annotate texts/XML/echo/de/Adams_1785_S7ECRGW8.xml @ 31:edf6e8fcf323 default tip

Removing DESpecs directory which deserted to git
author Klaus Thoden <kthoden@mpiwg-berlin.mpg.de>
date Wed, 29 Nov 2017 16:55:37 +0100
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1 <?xml version="1.0" encoding="utf-8"?><echo xmlns="http://www.mpiwg-berlin.mpg.de/ns/echo/1.0/" xmlns:de="http://www.mpiwg-berlin.mpg.de/ns/de/1.0/" xmlns:dcterms="http://purl.org/dc/terms" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:echo="http://www.mpiwg-berlin.mpg.de/ns/echo/1.0/" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.0RC">
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2 <metadata>
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3 <dcterms:identifier>ECHO:S7ECRGW8.xml</dcterms:identifier>
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4 <dcterms:creator identifier="GND:122668766">Adams, George</dcterms:creator>
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5 <dcterms:title xml:lang="de">Versuch über die Elektrizität, worinn Theorie und Ausübung dieser Wissenschaft durch eine Menge methodisch geordneter Experimente erläutert wird, nebst einem Versuch über den Magnet</dcterms:title>
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6 <dcterms:date xsi:type="dcterms:W3CDTF">1785</dcterms:date>
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7 <dcterms:language xsi:type="dcterms:ISO639-3">deu</dcterms:language>
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8 <dcterms:rights>CC-BY-SA</dcterms:rights>
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9 <dcterms:license xlink:href="http://creativecommons.org/licenses/by-sa/3.0/">CC-BY-SA</dcterms:license>
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10 <dcterms:rightsHolder xlink:href="http://www.mpiwg-berlin.mpg.de">Max Planck Institute for the History of Science, Library</dcterms:rightsHolder>
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11 <log>not valid, q again, and a note, changed q to quote and added an anchor for the note</log>
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12 </metadata>
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13 <text xml:lang="de" type="free">
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14 <div xml:id="echoid-div1" type="section" level="1" n="1"><pb file="0001" n="1"/>
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15 <pb file="0002" n="2"/>
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16 <handwritten/>
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17 <pb file="0003" n="3"/>
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18 <pb file="0004" n="4"/>
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19 <pb file="0005" n="5"/>
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20 </div>
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21 <div xml:id="echoid-div2" type="section" level="1" n="2">
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22 <head xml:id="echoid-head1" xml:space="preserve">Verſuch <lb/>über die <lb/>Elektricität, <lb/>worinn <lb/>Theorie und Ausübung <lb/>dieſer Wiſſenſchaft <lb/>durch <lb/>eine Menge methodiſch geordneter <lb/>Experimente <lb/>erläutert wird,</head>
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23 <head xml:id="echoid-head2" xml:space="preserve">nebſt einem <lb/>Verſuch über den Magnet <lb/>von <lb/>George Adams <lb/>königl. großbritanniſch. Mechanikuz. <lb/>Aus dem Engliſchen, mit ſechs Kupfertafeln. <lb/>Leipzig, <lb/>im Schwickertſchen Verla<unsure/>ge 1785.</head>
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24 <pb file="0006" n="6"/>
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25 <handwritten/>
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26 <p>
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27 <s xml:id="echoid-s1" xml:space="preserve">MAX-PLANCK-INSTITUT <lb/>FOR WIS@@NSCHAFT@@ESCHICHTE <lb/>Bibliothek</s>
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28 </p>
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29 <handwritten/>
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30 <pb file="0007" n="7"/>
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31 </div>
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32 <div xml:id="echoid-div3" type="section" level="1" n="3">
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33 <head xml:id="echoid-head3" xml:space="preserve"><emph style="bf">Vorrede.</emph></head>
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34 <p>
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35 <s xml:id="echoid-s2" xml:space="preserve">Schon die Aufſchrift dieſes Verſuchs zeigt, <lb/>daß man hier kein vollkommen ausge-<lb/>führtes Syſtem der Elektricität zu erwarten ha-<lb/>be. </s>
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36 <s xml:id="echoid-s3" xml:space="preserve">Eine ganz vollſtändige Abhandlung über <lb/>die Theorie und Praxis der Elektricität würde <lb/>ein weitläuftigeres Werk und mehr Zeit erfor-<lb/>dern, als ich darauf zu verwenden im Stande <lb/>bin.</s>
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37 <s xml:id="echoid-s4" xml:space="preserve"/>
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38 </p>
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39 <p>
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40 <s xml:id="echoid-s5" xml:space="preserve">Man iſt jetzt allgemein über den Nutzen und <lb/>die Wichtigkeit der Lehre von der Elektricität <lb/>einverſtanden; </s>
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41 <s xml:id="echoid-s6" xml:space="preserve">und man kann mit Grund ver-<lb/>muthen, daß man in den künftigen Zeitaltern <lb/>dieſe Lehre als die Quelle anſehen werde, von <lb/>welcher die erſten Grundſätze der Naturkunde <lb/>abfließen; </s>
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42 <s xml:id="echoid-s7" xml:space="preserve">ihre wiſſentſchaftliche Würde iſt daher <lb/>eben ſo groß, als ihr Nutzen für die Menſch-<lb/>heit.</s>
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43 <s xml:id="echoid-s8" xml:space="preserve"/>
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44 </p>
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45 <p>
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46 <s xml:id="echoid-s9" xml:space="preserve">Ich have es nicht unternommen, die Ge-<lb/>ſchichte dieſer Lehre von ihrem erſten rohen An-
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47 <pb file="0008" n="8" rhead="Vorrede."/>
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48 fange an zu beſchreiben, und dem menſchlichen <lb/>Verſtande auf den mannichfaltigen und unre-<lb/>gelmäßigen Wegen nachzugehen, auf welchen <lb/>er den Geſetzen und der Quelle der Elektricität <lb/>nachgeforſchet hat. </s>
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49 <s xml:id="echoid-s10" xml:space="preserve">Dies hat unſtreitig D. <lb/></s>
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50 <s xml:id="echoid-s11" xml:space="preserve">Prieſtley mit vieler Vortreflichkeit ausge-<lb/>führet. </s>
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51 <s xml:id="echoid-s12" xml:space="preserve">Unſere Kenntniſſe ſind noch ſo einge-<lb/>ſchränkt, und die Geheimniſſe der Natur ſo <lb/>tief verborgen, daß es ſchwer zu beſtimmen <lb/>bleibt, ob die angenommene Theorie in der <lb/>Wahrheit gegründet und der Natur gemäß ſey, <lb/>oder ob uns die Phyſiker der künftigen Zeit als <lb/>bloße Kinder anſehen werden, die ſich mit un-<lb/>vollkommenen Meinungen und ſchlecht überdach-<lb/>ten Hypotheſen befriediget haben.</s>
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52 <s xml:id="echoid-s13" xml:space="preserve"/>
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53 </p>
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54 <p>
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55 <s xml:id="echoid-s14" xml:space="preserve">Wenn man viele Dinge zuſammenmiſcht, <lb/>welche wenig oder gar keine Verbindung mit <lb/>eiander haben, ſo entſteht daraus natürlich Ver-<lb/>wirrung. </s>
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56 <s xml:id="echoid-s15" xml:space="preserve">Ich habe mich daher in dieſem Ver-<lb/>ſuche beſtrebt, die weſentlichen Theile der Elek-<lb/>tricität methodiſch und kurz zuſammenzufaſſen <lb/>und zu ordnen, um dadurch ihre Anwendung <lb/>leicht, angenehm und dem angehenden Prakti-<lb/>ker faßlich zu m@chen, und durch Zuſammen-<lb/>ſtellung aller Verſuche, welche zu einerley Fa-
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57 <pb file="0009" n="9" rhead="Vorrede."/>
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58 che gehören, wechſelſeitige Erläuterung des ei-<lb/>nen durch den andern zu bewirken, damit man <lb/>hierdurch die Stärke oder Schwäche der daraus <lb/>hergeleiteten Theorien deſto beſſer beurtheilen <lb/>könne. </s>
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59 <s xml:id="echoid-s16" xml:space="preserve">Und obgleich die Beſchaffenheit und <lb/>die engen Grenzen meines Plans keinen Reich-<lb/>thum an Bemerkungen und keine umſtändliche <lb/>Anführung aller Kleinigkeiten zuließen, ſo wird <lb/>doch, wie ich hoffe, wenig Brauchbares und <lb/>Wichtiges ganz übergangen worden ſeyn.</s>
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60 <s xml:id="echoid-s17" xml:space="preserve"/>
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61 </p>
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62 <p>
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63 <s xml:id="echoid-s18" xml:space="preserve">Da ich mich nicht gern eines Plagiats <lb/>beſchuldiget ſehen möchte, ſo bekenne ich mit <lb/>Vergnügen die Unterſtützung, welche mir ver-<lb/>ſchiedene über meinen Gegenſtand ausgearbeitete <lb/>Schriften gewährt habe. </s>
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64 <s xml:id="echoid-s19" xml:space="preserve">Mit uneingeſchränk-<lb/>ter Freyheit have ich aus dieſen Schriften <lb/>ausgewählt, was ich zu meiner Abſicht dien-<lb/>liches darinn gefunden habe Beſonders ha-<lb/>be ich Herrn Banks für die Gefälligkeit zu <lb/>danken, mit welcher er mir die Memoires de <lb/>l’Academie de Berlin vom Jahr 1780 zum <lb/>Gebrauch bey meiner Arbeit überlaſſen hat.</s>
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65 <s xml:id="echoid-s20" xml:space="preserve"/>
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66 </p>
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67 <p>
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68 <s xml:id="echoid-s21" xml:space="preserve">Die häufigen Abhaltungen und Störungen, <lb/>denen ich, als Handelsmann, unterworfen bin,
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69 <pb file="0010" n="10" rhead="Vorrede."/>
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70 werden mich hoffentlich entſchuldigen, wenn <lb/>meine Leſer einige Fehler entdecken ſollten, die <lb/>ſie ſelbſt gütigſt verbeſſern werden.</s>
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71 <s xml:id="echoid-s22" xml:space="preserve"/>
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72 </p>
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73 <p>
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74 <s xml:id="echoid-s23" xml:space="preserve">Es ſey mir noch erlaubt, bey dieſer Ge-<lb/>legenheit dem Publikum bekannt zu machen, <lb/>daß ich jetzt mit einem Werke beſchäftiget bin, <lb/>in welchem ich die mechaniſchen Theile der <lb/>mathematiſchen und phyſikaliſchen Wiſſenſchaf-<lb/>ten beſchreiben, und den mannigfaltigen Ge-<lb/>brauch der Inſtrumente mit ihren neueſten <lb/>Verbeſſerungen erklären will: </s>
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75 <s xml:id="echoid-s24" xml:space="preserve">welches, wie <lb/>ich hoffe, die Erlernung der Wiſſenſchaft er-<lb/>leichtern, und ihren Fortgang befördern ſoll. <lb/></s>
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76 <s xml:id="echoid-s25" xml:space="preserve">Ich werde bey dieſem Werke weder Mühe <lb/>noch Koſten ſcheuen.</s>
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77 <s xml:id="echoid-s26" xml:space="preserve"/>
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78 </p>
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79 <pb file="0011" n="11"/>
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80 <figure>
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81 <image file="0011-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0011-01"/>
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82 </figure>
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83 </div>
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84 <div xml:id="echoid-div4" type="section" level="1" n="4">
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85 <head xml:id="echoid-head4" xml:space="preserve">Innhalt.</head>
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86 <head xml:id="echoid-head5" xml:space="preserve">Erſtes Capitel.</head>
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87 <note position="right" xml:space="preserve"> <lb/># Von der Elektricität überhaupt. # Seite 1 <lb/>1. 2. Verſuch. Anziehen und Zurückſtoßen geriebnen <lb/># Glaſes und Siegellacks. # 2 <lb/># Definition der Elektricität. # 3 <lb/># Definition der Erregung der Elektricität. # ebend. <lb/># Elektriſche und nicht – elektriſche Körper. # ebend. <lb/>3. 4. — Erläuterung der Definition der Leiter und <lb/># Nicht-leiter. # 4 <lb/># Unterſchied zwiſchen erregter und mitgethcilter Elektri-<lb/># cität. # ebend. <lb/>5. 6. — Entgegengeſetzte Elektricitäten. # 5 <lb/># Verzeichniß leitender Subſtanzen. # 6 <lb/># — elektriſcher Körper. # 9 <lb/># Achard’s Meinung über den Unterſchied zwiſchen elek-<lb/># triſchen und nicht-elektriſchen Körpern. # ebend. <lb/># Verzeichniß elektriſcher Körper, welche verſchiedene <lb/># Elektricitäten hervorbringen. # 11 <lb/># Bergmanns Beobachtungen hierüber. # ebend. <lb/>Zweytes Capitel. <lb/>Von der Elektriſirmaſchine, nebſt Anweiſungen <lb/># zu ihrem Gebrauch. # 14 <lb/>Beſchreibung der Elektriſirmaſchine. # ebend. <lb/>7. Verſuch. Erregung poſitiver und negativer Elektrici-<lb/># tät. # 16 <lb/># Wirkung des Küſſens. # 18 <lb/>9. — Entgegengeſetzte Elektricitäten an einer zerbroche-<lb/># nen Siegellackſtange. # 22
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88 <pb file="0012" n="12" rhead="Innhalt."/>
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89 10 Verſuch. Elektriſche Erſcheinungen zwiſchen dem ne-<lb/># gativen und poſitiven Condu@r. # S. 22 <lb/>11. 12 — Wirkungen des iſolirten Küſſens, und D. <lb/># Franklin’s darauf gebaute Theorie. # 23 <lb/># Beſchreibung des Ausladers. # 25 <lb/># — des Ausladers mit Gelenk. # ebend. <lb/># — des allgemeinen Ausladers. # 26 <lb/># — einer hölzernen Preſſe. # ebend. <lb/># — des elektriſchen Luftthermometers von Rinners-<lb/># ley. # ebend. <lb/># — des Quadrantenelektrometers. # 27 <lb/># Townſhend’s Elektrometer # 28 <lb/>Drittes Capitel. <lb/>Die Eigenſchaften des elektriſchen Anziehens und <lb/># Zurückſtoßens, durch Verſuche mit leichten <lb/># Körpern erläutert. # 29 <lb/>Allgemeine Eigenſchaften des Anziehens und Zurück-<lb/># ſtoßens. # 30 <lb/>13 Verſuch. Der Federbuſch. # 31 <lb/>14 — Anziehen und Zurückſtoßen der Korkkugeln. # ebend. <lb/>15 — — — der Fäden. # 32 <lb/>16 — Nollets Reif mit Fäden. # ebend. <lb/>17. 18 — Tanzende Bilder. # 33 <lb/>19 — Das ſchwebende Goldblättchen. # 35 <lb/>20 — Das um eine Kugel bewegte Goldblättchen. # ebend. <lb/>21 — Elektriſcher Seiltänzer. # ebend. <lb/>22 — Elektriſcher Fiſch. # ebend. <lb/>23 — Die umlaufende Glaskugel. # 36 <lb/>24 — Elektriſches Glockenſpiel. # ebend. <lb/>25 — Elektriſches Sphäroid. # 37 <lb/>26 — Elektriſtrte Feder und Glasröhre. # 38 <lb/>27 — Kugeln unter dem Trinkglaſe. # ebend. <lb/>28. 29 — Daß die Anziehung durch elektriſche Körper <lb/># wirke. # 39 <lb/></note>
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90 <pb file="0013" n="13" rhead="Innhalt."/>
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91 </div>
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92 <div xml:id="echoid-div5" type="section" level="1" n="5">
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93 <head xml:id="echoid-head6" xml:space="preserve">Viertes Capitel.</head>
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94 <note position="right" xml:space="preserve"> <lb/>Das Anziehen und Zurückſtoßen in Abſicht auf die <lb/># entgegengeſetzten Elektricitäten. # S. 39 <lb/>30 — 39 Verſuch. Ueber die Wirkungen und die ent-<lb/># gegengeſetzte Beſchaffenheit der Elektricitäten. # 40 u. f. <lb/>40 — 42 — Ueber die abwechſelnden Zonen von po-<lb/># ſitiver und negativer Elektricität. # 43 u. f. <lb/>43 — Ueber die ſchwingende Bewegung zwiſchen der <lb/># Luft und der elektriſchen Materie. # 45 <lb/>44 — 52. Ueber das Anziehen, Zurückſtoßen und <lb/># Zuſammenhängen geriebner ſeidner Bänder. # 46 u. f. <lb/>Fünftes Capitel. <lb/>Vom elektriſchen Funken. # 50 <lb/>53 Verſuch. Das Funkenziehen. # ebend. <lb/># Ueber die Natur und Entſtehung des elektriſchen <lb/># Funkens. # ebend. <lb/>54 — Die leuchtende elfenbeinerne Kugel. # 52 <lb/>55 — Die leuchtende hölzerne Kugel. # ebend. <lb/>56 — Hawksbee’s Verſuch. # 53 <lb/>57 — D. Príeſtley’s Verſuch. # ebend. <lb/>58 — Leuchtendes Waſſer. # 54 <lb/>59 — Der grüne Funken. # ebend. <lb/>60 — Die Spiralröhre. # ebend. <lb/>61 — Leuchtende Buchſtaben. # 55 <lb/>62. 63 — Funken an Spitzen. # ebend. <lb/>64 — Funken von iſolirten Perſonen. # 56 <lb/>65 — Anzünden des Weingeiſts durch die Elektricität. # 57 <lb/>66. 67 — Phänomene des elektriſirten Dampfs. # ebend. <lb/>68 — Die Piſtole mit entzündbarer Luft. # 59 <lb/>Sechſtes Capitel. <lb/>Von elektriſirten Spitzen. # 61 <lb/>69 — 72 Verſuch. Erſcheinungen des Lichts an nega-<lb/># tiv oder poſitiv elektriſt<unsure/>rten Spitzen. # 61
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95 <pb file="0014" n="14" rhead="Innhalt."/>
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96 73. 74 — Wirkungen einer geriebenen Glasröhre auf <lb/># dieſe Erſcheinungen. # S. 62 <lb/>75 — Biegung einer Lichtflamme nach verſchiedentlich <lb/># elektriſirten Conductoren. # 63 <lb/>76 — Elektriſches Flugrad. # ebend. <lb/>77 — dergl. auf einer ſchiefen Fläche laufendes. # 64 <lb/>78 — Elektriſcher Krahn. # ebend. <lb/>79 — Verſchiedne Flugräder. # ebend. <lb/>Vom elektriſchen Winde. # ebend. <lb/>Siebentes Capitel. <lb/>Von der leidner Flaſche. # 65 <lb/>80 Verſuch. Ladung und Entladung der leidner Fla-<lb/># ſche. # 65 <lb/>81 — Elektriſcher Schlag. # 66 <lb/># Bemerkungen über die leidner Flaſche. # 67 <lb/># D. Franklin’s Theorie derſelben. # 68 <lb/>82 Verſuch. Eine iſolirte Flaſche kann nicht geladen <lb/># werden. # 69 <lb/>83. 84 — So viel Elektricität aus der äußern Seite <lb/># heraus geht, eben ſo viel geht in die innere hinein. # 70 <lb/>85 — Uebergang der Elektricität von einer Seite zur <lb/># andern. # 71 <lb/>86 — Zwo poſitiv geladene Flaſchen explodiren nicht. <lb/># ebend. <lb/>87 — Zwo verſchiedentlich geladene Flaſchen ſchlagen <lb/># gegen einander. # ebend. <lb/>88 — Eine negativ entladene Flaſche. # ebend. <lb/>89 — Zwo Flaſchen werden zugleich mit entgegenge-<lb/># ſetzten Kräften geladen. # 72 <lb/>90 — Eine Flaſche mit beweglichen Belegungen. # ebend. <lb/>91 — Eine fleckenweis belegte Flaſche. # ebend. <lb/>92 — Eine durch Schrot geladene Flaſche. # 73 <lb/>93 — Eine bloß inwendig belegte Flaſche. # ebend. <lb/>94 — Eine Flaſche mit der Kette. # ebend.
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97 <pb file="0015" n="15" rhead="Innhalt."/>
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98 95 Verſuch. Die doppelte Flaſche. # S. 74 <lb/>96. 97 — Kugeln durch die Belegung und den Knopf <lb/># einer Flaſche zu elektriſiren. # 75 <lb/>98 — Die zwiſchen zwo Flaſchen ſpielende Korkkugel. <lb/># ebend. <lb/>99 — Spiel der Korkkugel zwiſchen dem Knopf einer <lb/># Flaſche und einer mit der äußern Belegung verbun-<lb/># denen meſſingenen Kugel. # 76 <lb/>100 — Korkkugel zwiſchen zwo mit einerley Kraft ge-<lb/># ladenen Flaſchen. # ebend. <lb/>101 — Das umgedrehte Flugrad. # ebend. <lb/>102 — Die geriebene Glastafel. # 77 <lb/># Beſchreibung eines verbeſſerten Apparatus. # 78 <lb/>103 — 106 Verſuch. Erſcheinungen des Lichts an zu-<lb/># geſpitzten Dräthen beym Laden einer Flaſche. # 79 <lb/>107 — Die mit verſchiedenen Zonen belegte Flaſche. # 80 <lb/>108 — Erſcheinungen des Lichts. # 81 <lb/>109 — Geriebnes Glas am Knopfe einer Flaſche. # 82 <lb/>110 — Das Leidner Vacuum. # ebend. <lb/>111 — Der leuchtende Conductor. # ebend. <lb/>112 — Geladene Flaſche im luftleeren Raume. # 83 <lb/>113. 114 Verſuch mit einem Wachslichte. # ebend. <lb/>115 — Mit einer Karte. # 84 <lb/>116 — Mit vier Korkkugeln. # ebend. <lb/>117 — Mit einem gemahlten Kartenblatt. # ebend. <lb/>118 — 124. Verſuche, welche wider die angenom-<lb/># mene Theorie ſtreiten. # 85 <lb/>Achtes Capitel. <lb/>Von der elektriſchen Batterie. # 87 <lb/>125 Verſuch. Glühend gemachter Drath. # 89 <lb/>126 — Ein Buch Papier zu durchlöchern. # ebend. <lb/>127 — Mitgetheilter Magnetiſmus. # ebend. <lb/>128 — Aufgehobne Polarität des Magnets. # ebend. <lb/>129 — Schmelzen des Draths. # 90
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99 <pb file="0016" n="16" rhead="Innhalt."/>
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100 130 Verſuch. Schmelzung des Draths in einer Glas-<lb/># röhre. # S. 90 <lb/>131 — Merkmale, welche eine Kette zurückläßt. # 91 <lb/>132 — Goldblättchen zu ſchmelzen. # ebend. <lb/>133 — Glas zu zerbrechen # 92 <lb/>134 — Gewichte aufzuheben. # ebend. <lb/>135 — Beſchreibung der Lateral – exploſion. # 93 <lb/>136. 137 — Ueber die Lateral – exploſion. # 94 <lb/>138 — Exploſion durch eine Glasröhre mit Queckſil-<lb/># ber. # 95 <lb/>139 — – – – mit Waſſer. # 96 <lb/>140 — Künſtliches Erdbeben. # ebend. <lb/>141 — Verlängerter Drath. # 97 <lb/>142 — Schlag durch Waſſer. # ebend. <lb/>143 — Erzeugung prismatiſcher Farben. # 98 <lb/># D. Watſon’s Verſuche über die Diſtanz, bis auf <lb/># welche man den elektriſchen Schlag fortführen <lb/># kann. # ebend. <lb/># Volta’s Bemerkungen über Watſons Verſuche. # 99 <lb/># Hypotheſe. # 202 <lb/>Neuntes Capitel. <lb/>Ueber den Einfluß zugeſpitzter Ableiter an den <lb/># Gebäuden. # 103 <lb/>144 Verſuch. Das Donnerhaus. # 105 <lb/>145 — 148 — Entladungen durch Kugeln und Spi-<lb/># tzen. # 106 <lb/>149 — Die bewegliche Blaſe. # 107 <lb/>150 — Flocken von Baumwolle. # 108 <lb/>151 — Feine Fäden. # ebend. <lb/>152 — Das herabhängende Bret. # 109 <lb/># Wilſons gabelförmiger Apparatus und Verſuche <lb/># mit demſelben. # 110 <lb/># Beobachtungen über den Blitz und die Ableiter. # 114
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101 <pb file="0017" n="17" rhead="Innhalt."/>
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102 Zehntes Capitel. <lb/>Ladung einer Luftplatte. # S. 121 <lb/># Beſchreibung des Apparatus. # 122 <lb/>152 Verſuch. Schlag aus den Bretern. # ebend. <lb/>153 — Nachahmung des Blitzes. # 124 <lb/>154 — Mit Federn an den Bretern. # ebend. <lb/>155 — Mit Kleyen auf denſelben. # 125 <lb/>156 — Mit einem Lichte an dem einen Brete. # ebend. <lb/>Eilftes Capitel. <lb/>Vom Elektrophor. # 126 <lb/>157 — 168. Verſuche mit dem Elektrophor. # 127 <lb/>169 — Figuren des Harzſtaubs auf dem Elektro-<lb/># phor. # 133 <lb/>170. 171 — Elektriſcher Becher. # ebend. <lb/>172 Elektriſche Kanne und Kette. # 134 <lb/>173 — Ronayne’s Verſuch mit gerolltem Flanell. ebend. <lb/># Volta über das unvollkommne Iſoliren. # 135 <lb/># Beſchreibung des Condenſators oder Mikro – elektro-<lb/># meters. # ebend. <lb/># Gebrauch deſſelben. # 137 <lb/># Funken aus einer entladnen leidner Flaſche. # 139 <lb/># Funken aus einer Maſchine, welche vorher kein merk-<lb/># liches Zeichen einer Elektricität gab. # 140 <lb/>174 Verſuch, mit den Condenſatoren. # 142 <lb/>175 — mit dem Elektrophor. # 143 <lb/>176 — 178 mit den Condenſatoren. # 144 <lb/>179 — Zur Erläuterung eines Theils der Theorie. # 148 <lb/>Zwölftes Capitel. <lb/>Von der atmoſphäriſchen Elektricität. # 151 <lb/># Des p. Beccaria Apparatus. # 152 <lb/># Wirkungen der Feuchtigkeit in der Luft. # 153
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103 <pb file="0018" n="18" rhead="Innhalt."/>
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104 # Zeichen des ſtch aufklärenden Wetters. # S. 154 <lb/># Elektriſche Nebel. # 155 <lb/># Tägliche atmoſphäriſche Elektricität. # 157 <lb/># Elektricität des Abendthaues. # 158 <lb/>180 Verſuch. Erklärung der Elektricität des Thaues. # 159 <lb/># Bemerkungen über den elektriſchen Drachen und deſ-<lb/># ſen Zubereitung. # 160 <lb/># Flaſche, um eine Ladung auſzubewahren. # 162 <lb/># Atmoſphäriſches Elektrometer. # ebend. <lb/># Regenelektrometer. # 163 <lb/># Tragbares atmoſphäriſches Elektrometer. # 164 <lb/># Allgemeine Geſetze aus den Verſuchen mit dem elektri-<lb/># ſchen Drachen. # 166 <lb/># Achard von der elektriſchen Meteorologie. # 168 <lb/># Ebendeſſ. atmoſphäriſches Elektrometer. # 172 <lb/>Dreyzehntes Capitel. <lb/>Von der Verbreitung und Zertheilung der flüßigen <lb/># Materien durch die Elektricität. # 178 <lb/>181 Verſuch, mit einer Haarröhre. # 179 <lb/>182 — mit zwo Haarröhren an verſchiedentlich elek-<lb/># triſirten Conductoren. # ebend. <lb/>183 — Der leuchtende Waſſerſtrom. # 180 <lb/>184 — Der Feuerregen. # ebend. <lb/>185 — Ein Gefäß mit mehreren Haarröhren. # ebend. <lb/>186 — Anziehung eines Waſſertropfens. # ebend. <lb/>187 — Entladung einer Batterie durch einen Waſſer-<lb/># tropfen. # ebend. <lb/>188 — mit einem Waſſertropfen. # 181 <lb/>189 — Ein langer Funken aus Waſſer gezogen. # ebend. <lb/>190 — Feine Fäden aus Siegellak gezogen. # ebend. <lb/>191. 192 — Elektriſirter Waſſerſtral. # 182
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105 <pb file="0019" n="19" rhead="Innhalt."/>
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106 Vierzehntes Capitel. <lb/>Vom elektriſchen Lichte im luftleeren Raume. # S. 182 <lb/>193 Verſuch mit einer hohen Glocke. # ebend. <lb/># Beobachtung des Herrn Wilſon. # 183 <lb/>194 — Daß die Elektricität ſich ſelbſt nicht zurück-<lb/># ſtoße. # ebend. <lb/>195. 196 — Elektriſche Erſcheinungen im luftleeren <lb/># Raume. # 184 <lb/>197 — Nachahmung des Nordlichts. # 185 <lb/>198 — Leidner Flaſche im luftleeren Raume. # 186 <lb/>199 — Doppelbarometer. # ebend. <lb/>200 — Grüne Funken im luftleeren Raume. # 187. <lb/>Funfzehntes Capitel. <lb/>Von der mediciniſchen Elektricität. # 188 <lb/># Bemerkungen über die Wichtigkeit und den allgemei-<lb/># nen Einfluß der Elektricität. # 188 u. f. <lb/>201 Verſuch, mit einer Maus. # 194 <lb/>202 — Schlag durch verſchiedene Theile des menſch-<lb/># lichen Körpers. # ebend. <lb/>203 — Erregung der Elektricität durch Wärme und <lb/># Kälte. # 196 <lb/>204 — Das Thermometer ſteigt durch die Elektricität. # 197 <lb/># Apparatus zur mediciniſchen Elektricität und deſſen <lb/># Gebrauch. # 199 <lb/>Sechszehntes Capitel. <lb/>Vermiſchte Verſuche und Beobachtungen. # 206 <lb/>205 Verſuch im pantheon. # 207 <lb/>206 — Schießpulver zu zünden. # ebend. <lb/>207 — Beſchreibung einer pyramide. # 208 <lb/>208 — Kampher zu entzünden. # 209 <lb/>209 — Baumwolle anzuzünden. # ebend. <lb/># Volta’s Lampe mit entzündbarer’, Luft. # ebend.
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107 <pb file="0020" n="20" rhead="Innhalt."/>
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108 210 Verſuch mit Rinnersley’s Luftthermometer. # S. 210 <lb/>211 — Chryſtalliſtrtes Weinſteinöl. # 211 <lb/>212 — Ein ſehr langer Funken. # 212 <lb/>213 — 215. Mit phoſphorus. # ebend. <lb/>216 — von Herrn Achard. # 214 <lb/>217 — Eine Glasröhre zu durchbohren. # 216 <lb/>218 — Das Zaubergemälde. # 218 <lb/>219 — Mit Meſſingfeile. # 219 <lb/>220 — Ueber dem Rauch. # ebend. <lb/>221 — Die leuchtende Kette. # ebend. <lb/>222 — Der leuchtende Auslader. # 220 <lb/>223 — Leuchtende Röhren. # ebend. <lb/>224 — Die umlaufende Kugel. # 221 <lb/># Herrn Brooke’s Elektrometer. # ebend. <lb/>225 — Veränderung der Farbe vegetabiliſcher Säfte <lb/># 223 <lb/># Verſuche über verſchiedene elaſtiſche Fluida. # 224 <lb/>226 — von Herrn Marſham. # 229 <lb/># Ueber die Aehnlichkeit zwiſchen Wärme und Elektrici-<lb/># tät von Herrn Achard. # 230 <lb/>Verſuch über den Magnetiſmus, <lb/># worinn die Eigenſchaften des Magnets durch viele <lb/># merkwürdige Verſuche erläutert werden. # 237 <lb/></note>
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109 <pb file="0021" n="21"/>
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110 </div>
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111 <div xml:id="echoid-div6" type="section" level="1" n="6">
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112 <head xml:id="echoid-head7" xml:space="preserve"><emph style="bf">Verſuch</emph> <lb/>über die <lb/><emph style="bf">Elektricität.</emph></head>
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113 <head xml:id="echoid-head8" xml:space="preserve">Erſtes Capitel. <lb/>Von der Elektricität überhaupt.</head>
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114 <p>
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115 <s xml:id="echoid-s27" xml:space="preserve">Es muß jedem Forſcher nach Wahrheit auffallend und <lb/>befremdend ſcheinen, daß die Elektricität, dieſe <lb/>jetzt allgemein anerkannte Haupttriebfeder bey <lb/>Hervorbringung der Naturbegebenheiten, ſo lange Zeit <lb/>in Dunkel gehüllt und unbekannt geblieben iſt; </s>
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116 <s xml:id="echoid-s28" xml:space="preserve">denn kaum <lb/>wußten die Alten etwas von ihrem Daſeyn. </s>
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117 <s xml:id="echoid-s29" xml:space="preserve">Zwar waren <lb/>ihnen die beſondern Eigenſchaften dererjenigen Körper, <lb/>welche wir jetzt idioelektriſche (corpora per ſe ele-<lb/>ctrica) nennen, nicht gänzlich unbekannt; </s>
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118 <s xml:id="echoid-s30" xml:space="preserve">allein ihre <lb/>Kenntniſſe davon waren ſehr unbedeutend, und der Weg, <lb/>auf welchem ſie dazu gelangten, höchſt eingeſchränkt. </s>
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119 <s xml:id="echoid-s31" xml:space="preserve">Da-<lb/>her gewann dieſes Fach der Naturlehre ſehr wenigen Fort-<lb/>gang, bis endlich der glückliche Zeitpunkt erſchien, ſeit <lb/>welchem ſich die Naturforſcher von den Feſſeln der Hypo-<lb/>theſen losgeriſſen und von der Ungewißheit nichtiger Muth-<lb/>maſſungen befreyt haben.</s>
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120 <s xml:id="echoid-s32" xml:space="preserve"/>
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121 </p>
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122 <p>
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123 <s xml:id="echoid-s33" xml:space="preserve">Erſt damals ward das Daſeyn dieſer ſo feinen und in <lb/>den meiſten Fällen unſichtbaren Kraft erwieſen; </s>
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124 <s xml:id="echoid-s34" xml:space="preserve">man ent-<lb/>deckte viele ihrer Eigenſchaften, und fand, daß ihre Wirk-<lb/>ſamkeit allgemein, und ihr Einfluß uneingeſchränkt ſey.</s>
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125 <s xml:id="echoid-s35" xml:space="preserve"/>
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126 </p>
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127 <p>
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128 <s xml:id="echoid-s36" xml:space="preserve">Die Elektricität hat das beſondere Glück gehabt, <lb/>die Aufmerkſamkeit eines dortreflichen philoſophiſchen Ge-<lb/>ſchichtſchreibers auf ſich zu ziehen, der den Fortgang der
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129 <pb o="2" file="0022" n="22" rhead="Erſtes Capitel."/>
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130 Entdeckungen in dieſem Fach auf eine ſehr angenehme Art <lb/>beſchrieben, die verſchiedenen zu Erklärung der elektriſchen <lb/>Erſcheinungen erfundenen Theorien angezeigt, dem Pu-<lb/>blikum viele wichtige von ihm ſelbſt erdachte Verſuche mit-<lb/>getheilt, und das, was in dieſem weiten Felde noch zu <lb/>unterſuchen übrig bleibt, richtig angegeben hat <anchor type="note" xlink:href="" symbol="*)"/>.</s>
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131 <s xml:id="echoid-s37" xml:space="preserve"/>
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132 </p>
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133 <p>
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134 <s xml:id="echoid-s38" xml:space="preserve">Aber ſeit der Erſcheinung der <emph style="bf">prieſtleyiſchen</emph> Ge-<lb/>ſchichte der Elektricität iſt dennoch der elektriſche Appara-<lb/>tus aufs neue beträchtlich vermehrt, und eine Menge neuer <lb/>Verſuche angeſtellt worden. </s>
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135 <s xml:id="echoid-s39" xml:space="preserve">Dieſe Vermehrungen zu <lb/>beſchreiben, und dieſe Verſuche ſo zu ordnen, daß daraus <lb/>die Verbindung zwiſchen ihnen und der angenommenen <lb/>Theorie der Elektricität erhelle, dies war eine meiner vor-<lb/>nehmſten Abſichten bey der Ausarbeitung der gegenwärti-<lb/>gen Schrift. </s>
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136 <s xml:id="echoid-s40" xml:space="preserve">Auch wünſchte ich, meinen Bekannten ein <lb/>Werk in die Hände zu geben, wodurch ſie ſich in Stand <lb/>ſetzen könnten, die elektriſchen Maſchinen und Geräth-<lb/>ſchaften, die ich ihnen empfehle, mit Leichtigkeit und gu-<lb/>tem Erfolg zu gebrauchen.</s>
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137 <s xml:id="echoid-s41" xml:space="preserve"/>
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138 </p>
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139 <p>
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140 <s xml:id="echoid-s42" xml:space="preserve">Da die Lehre von der Elektricität, als Wiſſenſchaft <lb/>betrachtet, noch in ihrer erſten Kindheit iſt, ſo laſſen ſich <lb/>ihre Definitionen und Grundſätze freylich nicht mit geome-<lb/>tiſcher Strenge abfaſſen. </s>
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141 <s xml:id="echoid-s43" xml:space="preserve">Ich werde daher alle poſitive <lb/>und entſcheidende Ausſprüche, ſo viel möglich, vermeiden. <lb/></s>
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142 <s xml:id="echoid-s44" xml:space="preserve">Vielmehr wünſchte ich meine Leſer zu eigner Unterſuchung <lb/>und Vergleichung der Verſuche, und zu eigner Herleitung <lb/>der Folgerungen aus denſelben, zu ermuntern.</s>
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143 <s xml:id="echoid-s45" xml:space="preserve"/>
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144 </p>
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145 </div>
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146 <div xml:id="echoid-div7" type="section" level="1" n="7">
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147 <head xml:id="echoid-head9" xml:space="preserve">1. Verſuch.</head>
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148 <p>
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149 <s xml:id="echoid-s46" xml:space="preserve">Man reibe eine trockne Glasröhre mit trocknem Sei-<lb/>denzeuge, und bringe leichte Körper, z. </s>
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150 <s xml:id="echoid-s47" xml:space="preserve">V. </s>
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151 <s xml:id="echoid-s48" xml:space="preserve">Pflaumfe-<lb/>
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152 <anchor type="note" xlink:label="note-0022-01a" xlink:href="note-0022-01"/>
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153 <pb o="3" file="0023" n="23" rhead="Von der Elektricität überhaupt."/>
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154 dern, Kork – oder Holundermarkkügelchen gegen dieſelbe, <lb/>ſo werden dieſe Körper von der Röhre zuerſt angezogen, <lb/>und hernach zurückgeſtoſſen werden.</s>
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155 <s xml:id="echoid-s49" xml:space="preserve"/>
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156 </p>
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157 <div xml:id="echoid-div7" type="float" level="2" n="1">
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158 <note symbol="*)" position="foot" xlink:label="note-0022-01" xlink:href="note-0022-01a" xml:space="preserve">Der Verfaſſer redet von des D. Vrieſtley Hiſtory of <lb/>electricity, wovon die deutſche Ueberſetzung unter dem Titel: <lb/>Geſchichte und gegenwärtiger Zuſtand der Elektricität, aus <lb/>dem Engliſchen von D. I. G. Krünitz, Berlin und Stralſund <lb/>3772. 4. bekannt iſt. A. D. U.</note>
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159 </div>
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160 </div>
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161 <div xml:id="echoid-div9" type="section" level="1" n="8">
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162 <head xml:id="echoid-head10" xml:space="preserve">2. Verſuch.</head>
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163 <p>
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164 <s xml:id="echoid-s50" xml:space="preserve">Man reibe eine trockne Stange Siegellak, ſo wird <lb/>auch dieſe leichte Körper, die man dagegen hält, zuerſt <lb/>anziehen, und hernach zurückſtoßen.</s>
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165 <s xml:id="echoid-s51" xml:space="preserve"/>
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166 </p>
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167 <p>
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168 <s xml:id="echoid-s52" xml:space="preserve">Bey beyden vorſtehenden Verſuchen hat das Reiben <lb/>eine Kraft in Wirkſamkeit geſetzt, welche leichte Körper <lb/>anzieht und zurückſtößt; </s>
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169 <s xml:id="echoid-s53" xml:space="preserve">dieſe Kraft heißt Elektricität.</s>
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170 <s xml:id="echoid-s54" xml:space="preserve"/>
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171 </p>
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172 <p>
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173 <s xml:id="echoid-s55" xml:space="preserve">Man nimmt insgemein an, es ſey durch alle Körper <lb/>eine gewiſſe natürliche Menge oder ein natürliches Maaß <lb/>von elektriſcher Materie verbreitet, und in dieſem natürli-<lb/>chen Zuſtande wirkt dieſe Materi@ nicht auf unſere Sinne; <lb/></s>
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174 <s xml:id="echoid-s56" xml:space="preserve">wenn aber durch natürliche oder künſtliche Mittel dieſes <lb/>Gleichgewicht geſtöret, und in den Körper mehr oder <lb/>weniger gebracht wird, als das natürliche Ma@ß beträgt, <lb/>ſo entſtehen Wirkungen, die wir elektriſche nennen, und <lb/>man ſagt, der Körper ſey elektriſirt</s>
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175 </p>
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176 <p>
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177 <s xml:id="echoid-s57" xml:space="preserve">Von einem Körper, der durch Reiben vermögend <lb/>gemacht worden iſt, elektriſche Erſcheinungen hervorzu-<lb/>bringen, ſagt man, ſeine Elektricität ſey erreget, oder <lb/>er ſey u@ſprünglich elektriſt<unsure/>ret (excited).</s>
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178 <s xml:id="echoid-s58" xml:space="preserve"/>
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179 </p>
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180 <p>
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181 <s xml:id="echoid-s59" xml:space="preserve">Bernſtein, Seide, Harz, trocknes Holz und viele <lb/>andere Subſtanzen ziehen, gerieben, leichte Körper an und <lb/>ſtoſſen ſie wieder zurück; </s>
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182 <s xml:id="echoid-s60" xml:space="preserve">ſie heiſſen elektriſche, ur-<lb/>ſprünglich elektriſche @Körper (idio-electriea@, per <lb/>ſe electrica.) </s>
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183 <s xml:id="echoid-s61" xml:space="preserve">Subſtanzen, deren Reiben dieſes Anzie-<lb/>hen und Zurückſtoſſen nicht bewirkt, z. </s>
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184 <s xml:id="echoid-s62" xml:space="preserve">B. </s>
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185 <s xml:id="echoid-s63" xml:space="preserve">Metalle, Waſ-<lb/>ſer A. </s>
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186 <s xml:id="echoid-s64" xml:space="preserve">heiſſen nicht – elektriſche Körper (anelectrica.)</s>
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187 <s xml:id="echoid-s65" xml:space="preserve"/>
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188 </p>
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189 <p>
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190 <s xml:id="echoid-s66" xml:space="preserve">Iſt die geriebene Glasröhre oder Siegellackſtange in <lb/>gutem Stande, ſo<unsure/> ſtrömen freywillig Lichtbüſchel aus ihr, <lb/>welche ein ſehr ſchönes Schauſpiel darſtellen; </s>
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191 <s xml:id="echoid-s67" xml:space="preserve">auch hört man <lb/>bey Annäherung eines nicht – elektriſchen Körpers ein kni-<lb/>ſterndes Geräuſch.</s>
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192 <s xml:id="echoid-s68" xml:space="preserve"/>
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193 </p>
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194 <pb o="4" file="0024" n="24" rhead="Erſtes Capitel."/>
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195 </div>
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196 <div xml:id="echoid-div10" type="section" level="1" n="9">
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197 <head xml:id="echoid-head11" xml:space="preserve">3. Verſuch.</head>
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198 <p>
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199 <s xml:id="echoid-s69" xml:space="preserve">Man lege einen metallenen Cylinder auf ſeidene <lb/>Schnüre, oder ſetze ihn auf Glas, und bringe einen ge-<lb/>riebenen elektriſchen Körper gegen ihn, ſo werden alle Thei-<lb/>le des metallenen Cylinders leichte Körper eben ſo ſtark an-<lb/>ziehen und zurückſtoſſen, als der geriebene elektriſche Kör-<lb/>per ſelbſt.</s>
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200 <s xml:id="echoid-s70" xml:space="preserve"/>
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201 </p>
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202 </div>
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203 <div xml:id="echoid-div11" type="section" level="1" n="10">
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204 <head xml:id="echoid-head12" xml:space="preserve">4. Verſuch.</head>
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205 <p>
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206 <s xml:id="echoid-s71" xml:space="preserve">Man hänge eine trockene Glasſtange an ſeidene <lb/>Schnüre, oder ſtelle ſie auf Glas, und bringe einen gerie-<lb/>benen elektriſchen Körper dagegen, ſo wird ſich an dem <lb/>Glasſtabe kein Anziehen und Zurückſtoſſen zeigen; </s>
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207 <s xml:id="echoid-s72" xml:space="preserve">weil die <lb/>Elekricität nicht durch das Glas hindurchgehen kan.</s>
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208 <s xml:id="echoid-s73" xml:space="preserve"/>
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209 </p>
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210 <p>
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211 <s xml:id="echoid-s74" xml:space="preserve">Metalliſche und andere Körper, welche der Elektrici-<lb/>rät den Durchgang verſtatten, werden Leiter oder Ton-<lb/>duktoren genannt. </s>
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212 <s xml:id="echoid-s75" xml:space="preserve">Subſtanzen, durch welche die Elek-<lb/>tricität nicht dringen kan, heiſſen Nicht@Leiter.</s>
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213 <s xml:id="echoid-s76" xml:space="preserve"/>
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214 </p>
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215 <p>
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216 <s xml:id="echoid-s77" xml:space="preserve">Ein Körper, welcher mit lauter Nicht-Leitern um-<lb/>geben iſt, heißt iſolirt.</s>
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217 <s xml:id="echoid-s78" xml:space="preserve"/>
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218 </p>
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219 <p>
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220 <s xml:id="echoid-s79" xml:space="preserve">Hätte man dieſes Vermögen gewiſſer Körper, dem <lb/>Durchgange der Elektricität durch ihre Subſtanz und Zwi-<lb/>ſchenräume zu widerſtehen, nicht entdeckt, ſo würden die <lb/>wichtigſten und ſonderbarſten Wirkungen der Elektricität <lb/>unbekannt geblieben ſeyn. </s>
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221 <s xml:id="echoid-s80" xml:space="preserve">Faſt auf allen Seiten dieſes <lb/>Werks wird man Beweiſe von der Wahrheit dieſes Satzes <lb/>antreffen.</s>
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222 <s xml:id="echoid-s81" xml:space="preserve"/>
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223 </p>
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224 <p>
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225 <s xml:id="echoid-s82" xml:space="preserve">Wir ſehen aus dem 3ten und 4ten Verſuche, daß <lb/>man iſolirten leitenden Subſtanzen die elektriſche Kraft <lb/>durch geriebene elektriſche Körper mittheilen kan, und daß <lb/>ſie alsdann leichte Körpergen eben ſo, wie die elektriſchen <lb/>ſelbſt, anziehen und zurückſtoſſen. </s>
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226 <s xml:id="echoid-s83" xml:space="preserve">Nur findet ſich hiebey <lb/>der Unterſchied, daß ein Leiter, dem man die Elektricität <lb/>mitgetheilt hat, wenn er von einem andern mit der Erde <lb/>verbundenen Leiter berührt wird, dieſe Elektricität auf
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227 <pb o="5" file="0025" n="25" rhead="Von der Elektricität überhaupt."/>
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228 emmal ganz abgiebt, da hingegen ein elektriſcher Körper <lb/>unter eben den Umſtänden ſeine Elektricität nur zum Theil<unsure/> <lb/>verliert.</s>
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229 <s xml:id="echoid-s84" xml:space="preserve"/>
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230 </p>
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231 </div>
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232 <div xml:id="echoid-div12" type="section" level="1" n="11">
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233 <head xml:id="echoid-head13" xml:space="preserve">5. Verſuch.</head>
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234 <p>
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235 <s xml:id="echoid-s85" xml:space="preserve">Man elektriſire, mit geriebenen Glas oder Siegel@ <lb/>lak, zwo iſolirte Korkkugeln, welche an 6 Zoll langen Fä-<lb/>den hängen, ſo werden die Kugeln aus einander gehen@ <lb/>und ſich zurückſtoſſen.</s>
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236 <s xml:id="echoid-s86" xml:space="preserve"/>
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237 </p>
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238 </div>
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239 <div xml:id="echoid-div13" type="section" level="1" n="12">
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240 <head xml:id="echoid-head14" xml:space="preserve">6. Verſuch.</head>
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241 <p>
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242 <s xml:id="echoid-s87" xml:space="preserve">Man elektriſire die eine Kugel mit Glas, die andere <lb/>mit Siegellak, ſo werden ſie beyde einander anziehen.</s>
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243 <s xml:id="echoid-s88" xml:space="preserve"/>
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244 </p>
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245 <p>
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246 <s xml:id="echoid-s89" xml:space="preserve">Dieſe beyden ſo merklich verſchiedenen und entgegen-<lb/>geſetzten Wirkungen der anziehenden und zurückſtoſſenden <lb/>Kraft der Elektricität, ſind erſt in der neuſten Periode der<unsure/> <lb/>Geſchichte dieſer Wiſſenſchaft entdeckt worden.</s>
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247 <s xml:id="echoid-s90" xml:space="preserve"/>
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248 </p>
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249 <p>
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250 <s xml:id="echoid-s91" xml:space="preserve">Die durch Reiben des Glaſes erregte Elektricität wir@ <lb/>die poſitive, die durch Reiben des Siegellaks hervorge-<lb/>brachte hingegen die negative genannt. </s>
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251 <s xml:id="echoid-s92" xml:space="preserve">Man glaubte <lb/>anfänglich, der Unterſchied komme von dem elektriſchen <lb/>Körper her, und beyde Arten der Elektricität ſeyen weſent-<lb/>lich verſchieden; </s>
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252 <s xml:id="echoid-s93" xml:space="preserve">jetzt aber weiß man, daß ſich alle beyde <lb/>ſowohl durchs Reiben des Glaſes als des Siegellaks her-<lb/>vorbringen laſſen.</s>
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253 <s xml:id="echoid-s94" xml:space="preserve"/>
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254 </p>
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255 <p>
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256 <s xml:id="echoid-s95" xml:space="preserve">Die Entdeckung dieſer unterſchiedenen Kennzeichen <lb/>zwoer Arten von elektriſchen Körpern, veranlaßte die Na-<lb/>turforſcher, die elektriſchen Eigenſchaften der meiſten Kör-<lb/>per durch die Erfahrung zu unterſuchen, um zu beſtim-<lb/>men, welche Körper eine poſitive und welche eine negative <lb/>Elektricität hätten. </s>
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257 <s xml:id="echoid-s96" xml:space="preserve">Dadurch iſt die Anzahl der bekann-<lb/>ten elektriſchen Körper, welche ſonſt ſehr gering war, nun-<lb/>mehr auſſerordentlich angewachſen, wie folgende aus <lb/>Prieſtley’s Geſchichte der Elektricität und Tavallo’s
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258 <pb o="6" file="0026" n="26" rhead="Erſtes Capitel."/>
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259 vollſtändiger Abhandlung der Lehre von der <lb/>Elektricität <anchor type="note" xlink:href="" symbol="*)"/> genommene Tabelle zeigen wird.</s>
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260 <s xml:id="echoid-s97" xml:space="preserve"/>
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261 </p>
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262 </div>
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263 <div xml:id="echoid-div14" type="section" level="1" n="13">
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264 <head xml:id="echoid-head15" xml:space="preserve">Verzeichniß der leitenden Subſtanzen. <lb/>1. Steinartige Subſtanzen.</head>
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265 <p>
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266 <s xml:id="echoid-s98" xml:space="preserve">Steinartige Körper überhaupt leiten ſehr gut, wenn <lb/>ſie gleich trocken und warm ſind.</s>
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267 <s xml:id="echoid-s99" xml:space="preserve"/>
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268 </p>
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269 <p>
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270 <s xml:id="echoid-s100" xml:space="preserve">Kalkſtein und friſch gebrannter Kalk ſind beydes <lb/>ſchlechte Leiter.</s>
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271 <s xml:id="echoid-s101" xml:space="preserve"/>
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272 </p>
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273 <p>
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274 <s xml:id="echoid-s102" xml:space="preserve">Marmor leitet weit beſſer, als Sandſtein; </s>
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275 <s xml:id="echoid-s103" xml:space="preserve">auch hat <lb/>man unter den verſchiedenen Proben von Marmor, welche <lb/>man verſucht hat, ſehr wenig Unterſchied gefunden.</s>
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276 <s xml:id="echoid-s104" xml:space="preserve"/>
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277 </p>
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278 <p>
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279 <s xml:id="echoid-s105" xml:space="preserve">Ein großes Stück von weißem Spath, halbdurch-<lb/>ſichtig und ein wenig ins Blaue fallend, leitete kaum im <lb/>geringſten: </s>
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280 <s xml:id="echoid-s106" xml:space="preserve">man konnte aus dem erſten Leiter der Maſchi-<lb/>ne, während daß es an denſelben gehalten wurde, noch <lb/>immer ſehr ſtarke Funken ziehen.</s>
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281 <s xml:id="echoid-s107" xml:space="preserve"/>
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282 </p>
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283 <p>
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284 <s xml:id="echoid-s108" xml:space="preserve">Ein halb durchſichtiges Stück Achat nimmt den elek-<lb/>triſchen Funken in ſeine Subſtanz auf; </s>
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285 <s xml:id="echoid-s109" xml:space="preserve">doch geht derſelbe, <lb/>wenn er den Finger erreichen kan, auf {3/4} Zoll weit über <lb/>die Oberfläche dieſes Steins. </s>
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286 <s xml:id="echoid-s110" xml:space="preserve">Auch kan man dadurch eine <lb/>Batterie, wiewohl ſehr langſam, entladen.</s>
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287 <s xml:id="echoid-s111" xml:space="preserve"/>
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288 </p>
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289 <p>
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290 <s xml:id="echoid-s112" xml:space="preserve">Ein Stück Schiefer, dergleichen man gewöhnlich zu <lb/>Schreibtafeln gebraucht, iſt ein weit beſſerer Leiter als <lb/>Sandſtein, welcher nur ſchwach leitet.</s>
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291 <s xml:id="echoid-s113" xml:space="preserve"/>
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292 </p>
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293 <p>
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294 <s xml:id="echoid-s114" xml:space="preserve">Probirſtein leitet ſehr gut.</s>
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295 <s xml:id="echoid-s115" xml:space="preserve"/>
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296 </p>
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297 <p>
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298 <s xml:id="echoid-s116" xml:space="preserve">Gypsſtein und franzöſiſcher Alabaſter leiten ſehr gut; <lb/></s>
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299 <s xml:id="echoid-s117" xml:space="preserve">nur erhält der letztere einen ſtärkern Funken, weil er eine <lb/>glättere Oberfläche hat.</s>
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300 <s xml:id="echoid-s118" xml:space="preserve"/>
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301 </p>
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302 <note symbol="*)" position="foot" xml:space="preserve">Von Cavallo’s Compleat Treatiſe on Electricity, <lb/>London, 1778. 8 iſt die deutſche Ueberſetzung unter oben an-<lb/>gegebenem Titel Leipz<unsure/>ig 1779. 8. heraus gekommen und 1783 <lb/>mit einigen Zuſätzen vermehrt, wieder aufgelegt worden.</note>
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303 <pb o="7" file="0027" n="27" rhead="Von der Elektricität überhaupt."/>
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304 <p>
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305 <s xml:id="echoid-s119" xml:space="preserve">Schottiſcher Asbeſt, ſo wie er aus ſeinem Lager kömmt, <lb/>leitet nicht. </s>
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306 <s xml:id="echoid-s120" xml:space="preserve">Wenn man ihn an den Conduktor der Ma-<lb/>ſchine hält, ſo kan man währender Zeit bey ſehr mäßigem <lb/>Elektriſiren noch immer Funken von einem halben Zoll aus <lb/>dem Conduktor ziehen.</s>
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307 <s xml:id="echoid-s121" xml:space="preserve"/>
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308 </p>
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309 <p>
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310 <s xml:id="echoid-s122" xml:space="preserve">Spaniſche Kreide leitet eben ſo ſtark, als Marmor.</s>
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311 <s xml:id="echoid-s123" xml:space="preserve"/>
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312 </p>
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313 <p>
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314 <s xml:id="echoid-s124" xml:space="preserve">Egyptiſcher Granit leitet weit beſſer, als Sandſtein.</s>
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315 <s xml:id="echoid-s125" xml:space="preserve"/>
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316 </p>
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317 </div>
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318 <div xml:id="echoid-div15" type="section" level="1" n="14">
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319 <head xml:id="echoid-head16" xml:space="preserve">2. Salzige Subſtanzen.</head>
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320 <p>
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321 <s xml:id="echoid-s126" xml:space="preserve">Vitriolöl leitet fehr gut.</s>
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322 <s xml:id="echoid-s127" xml:space="preserve"/>
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323 </p>
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324 <p>
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325 <s xml:id="echoid-s128" xml:space="preserve">Die metalliſchen Salze leiten überhaupt beſſer, als <lb/>di<unsure/>e Mittelſalze.</s>
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326 <s xml:id="echoid-s129" xml:space="preserve"/>
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327 </p>
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328 <p>
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329 <s xml:id="echoid-s130" xml:space="preserve">Kupfer@ und Eiſenvitriol leiten ſehr gut, ob ſie gleich <lb/>den Schlag nicht durchlaſſen.</s>
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330 <s xml:id="echoid-s131" xml:space="preserve"/>
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331 </p>
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332 <p>
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333 <s xml:id="echoid-s132" xml:space="preserve">Vitrioliſirter Weinſtein giebt einen ſchwachen Fun-<lb/>ken.</s>
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334 <s xml:id="echoid-s133" xml:space="preserve"/>
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335 </p>
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336 <p>
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337 <s xml:id="echoid-s134" xml:space="preserve">Salpeter leitet nicht ſo gut, als Salmiak. </s>
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338 <s xml:id="echoid-s135" xml:space="preserve">Wenn <lb/>der elektriſche Schlag über ſeine Dberfläche geht, ſo zer-<lb/>ſchlägt er ſich mit beträchtlicher Gewalt nach allen Rich-<lb/>tungen in ſehr viele Stücken.</s>
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339 <s xml:id="echoid-s136" xml:space="preserve"/>
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340 </p>
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341 <p>
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342 <s xml:id="echoid-s137" xml:space="preserve">Der flüchtige Salmiak giebt einen ſchwachen Fun-<lb/>ken.</s>
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343 <s xml:id="echoid-s138" xml:space="preserve"/>
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344 </p>
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345 <p>
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346 <s xml:id="echoid-s139" xml:space="preserve">Steinſalz leitet, doch nicht völlig ſo gut, als Alaunz <lb/>der darauf ſchlagende Funken iſt ſehr roth.</s>
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347 <s xml:id="echoid-s140" xml:space="preserve"/>
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348 </p>
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349 <p>
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350 <s xml:id="echoid-s141" xml:space="preserve">Salmiak übertriſt an leitender Kraft das Steinſalz <lb/>und den Alaun, nimmt aber nicht den geringſten Funken <lb/>an. </s>
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351 <s xml:id="echoid-s142" xml:space="preserve">Er ſcheint alſo aus einer unzählbaren Menge der <lb/>feinſten Spitzen zu beſtehen.</s>
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352 <s xml:id="echoid-s143" xml:space="preserve"/>
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353 </p>
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354 <p>
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355 <s xml:id="echoid-s144" xml:space="preserve">Die ſelenitiſchen Salze leiten nur wenig.</s>
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356 <s xml:id="echoid-s145" xml:space="preserve"/>
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357 </p>
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358 <p>
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359 <s xml:id="echoid-s146" xml:space="preserve">Veym Alaun iſt der elektriſche Schlag mit einem <lb/>beſondern Laut, wie das Ziſchen einer Rackete, begleitet.</s>
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360 <s xml:id="echoid-s147" xml:space="preserve"/>
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361 </p>
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362 </div>
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363 <div xml:id="echoid-div16" type="section" level="1" n="15">
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364 <head xml:id="echoid-head17" xml:space="preserve">3. Brennbare Körper.</head>
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365 <p>
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366 <s xml:id="echoid-s148" xml:space="preserve">Ein Stück Kies von dunkler Farbe nimmt aus dem <lb/>erſten Leiter der Maſchine bis auf eine beträchtliche Weite
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367 <pb o="8" file="0028" n="28" rhead="Erſtes Capitel."/>
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368 Funken an, etwa ſo, wie die ſchlechtern Stücken der <lb/>Kohle.</s>
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369 <s xml:id="echoid-s149" xml:space="preserve"/>
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370 </p>
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371 <p>
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372 <s xml:id="echoid-s150" xml:space="preserve">Ein anderes Stück Kies, welches ein Theil einer <lb/>regelmäßig geſtalteten Kugel geweſen iſt, und einen me-<lb/>talliſchen Glanz hat, leitet nicht völlig ſo gut, doch weit <lb/>beſſer, als irgend eine andere ſteinartige Subſtanz. </s>
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373 <s xml:id="echoid-s151" xml:space="preserve">Es <lb/>hält das Mittel zwiſchen Stein und Metall.</s>
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374 <s xml:id="echoid-s152" xml:space="preserve"/>
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375 </p>
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376 <p>
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377 <s xml:id="echoid-s153" xml:space="preserve">Waſſerbley im Bleyſtift leitet den Schlag eben ſo <lb/>gut, als Metall und Kohle. </s>
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378 <s xml:id="echoid-s154" xml:space="preserve">Ein kleines Bleyſtift-<lb/>klümpgen zieht aus dem erſten Leiter einen eben ſo voll-<lb/>kommenen und ſtarken Funken, als ein meſſingener <lb/>Knopf.</s>
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379 <s xml:id="echoid-s155" xml:space="preserve"/>
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380 </p>
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381 </div>
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382 <div xml:id="echoid-div17" type="section" level="1" n="16">
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383 <head xml:id="echoid-head18" xml:space="preserve">4. Metalle und Minern.</head>
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384 <p>
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385 <s xml:id="echoid-s156" xml:space="preserve">Eine mexikanlſche Goldſtufe leitet ſo gut, daß man <lb/>kaum einen Unterſchied zwiſchen ihr und dem Golde ſelbſt <lb/>finden kann.</s>
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386 <s xml:id="echoid-s157" xml:space="preserve"/>
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387 </p>
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388 <p>
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389 <s xml:id="echoid-s158" xml:space="preserve">Eine Silberſtufe aus Potoſi leitet ſehr gut, ob ſie <lb/>gleich mit eingeſprengtem Kies vermiſcht iſt.</s>
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390 <s xml:id="echoid-s159" xml:space="preserve"/>
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391 </p>
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392 <p>
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393 <s xml:id="echoid-s160" xml:space="preserve">Zwo Stufen Kupfererz, die eine ſo reichhaltig, als <lb/>man nur irgend eine kennt, die andere nur halb ſo kupfer-<lb/>haltig, zeigen kaum den geringſten Unterſchied in ihrer <lb/>leitenden Kraft.</s>
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394 <s xml:id="echoid-s161" xml:space="preserve"/>
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395 </p>
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396 <p>
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397 <s xml:id="echoid-s162" xml:space="preserve">Blutſtein iſt ein ſehr guter Leiter.</s>
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398 <s xml:id="echoid-s163" xml:space="preserve"/>
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399 </p>
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400 <p>
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401 <s xml:id="echoid-s164" xml:space="preserve">Schwarzer Sand von den afrikaniſchen Küſten, der <lb/>ſehr eiſenhaltig iſt, und zum Theil vom Magnet eben ſo <lb/>ſtark, als Stahlfeile, angezogen wird, leitet zwar die <lb/>Elektricität, aber nicht den Schlag. </s>
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402 <s xml:id="echoid-s165" xml:space="preserve">Sondert man mit <lb/>dem Magnet alles das ab, was derſelbe leicht anzieht, ſo <lb/>leitet dieſes den Schlag ſehr gut; </s>
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403 <s xml:id="echoid-s166" xml:space="preserve">alles übrige leitet faſt <lb/>gar nicht.</s>
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404 <s xml:id="echoid-s167" xml:space="preserve"/>
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405 </p>
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406 <p>
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407 <s xml:id="echoid-s168" xml:space="preserve">Auch diejenigen Minern, in welchen die Metalle mit <lb/>Schwefel oder Arſenik vererzet ſind, z. </s>
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408 <s xml:id="echoid-s169" xml:space="preserve">B. </s>
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409 <s xml:id="echoid-s170" xml:space="preserve">Bley – und <lb/>Zinnerze, oder Zinnober, als das Queckſilbererz, ſind et-<lb/>was ſchlechtere Leiter, als Gold und Silberſtufen.</s>
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410 <s xml:id="echoid-s171" xml:space="preserve"/>
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411 </p>
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412 <pb o="9" file="0029" n="29" rhead="Von der Elektricität überhaupt."/>
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413 <p>
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414 <s xml:id="echoid-s172" xml:space="preserve">Mineralien, welche nichts weiter als metalliſche Er-<lb/>de enthalten, leiten wenig beſſer, als andere Steine.</s>
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415 <s xml:id="echoid-s173" xml:space="preserve"/>
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416 </p>
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417 <p>
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418 <s xml:id="echoid-s174" xml:space="preserve">Bley, Eiſen, Zinn, Meſſing, Kupfer, Silber und <lb/>Gold ſind die beſten Leiter.</s>
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419 <s xml:id="echoid-s175" xml:space="preserve"/>
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420 </p>
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421 </div>
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422 <div xml:id="echoid-div18" type="section" level="1" n="17">
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423 <head xml:id="echoid-head19" xml:space="preserve">5. Flüßige Materien.</head>
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424 <p>
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425 <s xml:id="echoid-s176" xml:space="preserve">Alle Säfte des thieriſchen Körpers.</s>
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426 <s xml:id="echoid-s177" xml:space="preserve"/>
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427 </p>
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428 <p>
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429 <s xml:id="echoid-s178" xml:space="preserve">Alle flüßige Materien, Luft und Oele ausgenom-<lb/>men.</s>
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430 <s xml:id="echoid-s179" xml:space="preserve"/>
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431 </p>
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432 <p>
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433 <s xml:id="echoid-s180" xml:space="preserve">Die Ausflüſſe brennender Körper</s>
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434 </p>
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435 <p>
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436 <s xml:id="echoid-s181" xml:space="preserve">Schnee, Rauch, Dämpfe des heißen Waſſers, das <lb/>Vakuum unter der Glocke der Luftpumpe, Kohlen A.</s>
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437 <s xml:id="echoid-s182" xml:space="preserve"/>
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438 </p>
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439 </div>
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440 <div xml:id="echoid-div19" type="section" level="1" n="18">
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441 <head xml:id="echoid-head20" xml:space="preserve">Elektriſche Körper.</head>
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442 <p>
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443 <s xml:id="echoid-s183" xml:space="preserve">Bernſtein, Glas, Pech und Schwefel; </s>
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444 <s xml:id="echoid-s184" xml:space="preserve">alle Edel-<lb/>geſteine, als Diamanten, Rubinen, Granaten, Topaſen, <lb/>Hyacinthen, Chryſolithen, Smaragden, Sapphyre, <lb/>Amethyſte, Opale und beſonbers die Turmalins: </s>
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445 <s xml:id="echoid-s185" xml:space="preserve">alle <lb/>Harze und harzige Compoſitionen, Wachs, Seide, Baum-<lb/>wolle; </s>
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446 <s xml:id="echoid-s186" xml:space="preserve">alle trockne thieriſche Subſtanzen, z. </s>
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447 <s xml:id="echoid-s187" xml:space="preserve">B. </s>
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448 <s xml:id="echoid-s188" xml:space="preserve">Federn, <lb/>Wolle, Haare A. </s>
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449 <s xml:id="echoid-s189" xml:space="preserve">Papier, Zucker, Luft, Del, Chocolat, <lb/>metalliſche Kalke, trockne Vegetabilien u. </s>
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450 <s xml:id="echoid-s190" xml:space="preserve">ſ w.</s>
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451 <s xml:id="echoid-s191" xml:space="preserve"/>
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452 </p>
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453 <p>
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454 <s xml:id="echoid-s192" xml:space="preserve">Der innere weſentliche Unterſchied zwiſchen elektri-<lb/>ſchen und nicht. </s>
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455 <s xml:id="echoid-s193" xml:space="preserve">elektriſchen Körpern gehört zu den noch <lb/>unentdeckten Geheimniſſen der Natur. </s>
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456 <s xml:id="echoid-s194" xml:space="preserve">Nur ſoviel iſt <lb/>ausgemacht, daß das leitende Vermögen der Körper eini-<lb/>germaßen von der Wärme abhängt, oder durch dieſelbe <lb/>verändert wird. </s>
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457 <s xml:id="echoid-s195" xml:space="preserve">Glas, Harz und viele andere elektriſche <lb/>Körper werden durch die Hitze in Leiter verwandlet; </s>
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458 <s xml:id="echoid-s196" xml:space="preserve">da <lb/>hingegen die Kälte, wenn nur keine Feuchtigkeit dabey <lb/>iſt, alle elektriſche Subſtanzen noch ſtärker elektriſch <lb/>macht.</s>
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459 <s xml:id="echoid-s197" xml:space="preserve"/>
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460 </p>
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461 <p>
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462 <s xml:id="echoid-s198" xml:space="preserve">Herr Achard in Berlin hat in Rozier’s Jonrnal <lb/>de phyſique eine ſehr lehrreiche Abhandlung hierüber mit-<lb/>getheilt, worinn er durch Verſuche erweiſet: </s>
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463 <s xml:id="echoid-s199" xml:space="preserve">1) daß ge-<lb/>wiſſe Umſtände einen Körper, der vorher ein Nicht-Leiter
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464 <pb o="10" file="0030" n="30" rhead="Erſtes Capitel."/>
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465 war, zu einem Leiter machen können. </s>
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466 <s xml:id="echoid-s200" xml:space="preserve">2) Daß dieſe Um-<lb/>ſtände nichts anders ſind, als die Grade der Hitze, wel-<lb/>chen dieſer Körper ausgeſetzt wird. </s>
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467 <s xml:id="echoid-s201" xml:space="preserve">Er bemüht ſich, zu <lb/>zeigen, daß die vornehmſten Veränderungen, welche bey <lb/>Verſtärkung der Hitze in den Körpern vorgehen, in Ver-<lb/>größerung der Zwiſchenräume und in Verſtärkung der <lb/>Geſchwindigkeit derer im Körper enthaltenen und auf ihn <lb/>wirkenden Feuertheilchen beſtehen. </s>
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468 <s xml:id="echoid-s202" xml:space="preserve">Hierauf beweiſet er, <lb/>daß der letztere Umſtand nichts zu Veränderung der elek-<lb/>triſchen Eigenſchaften beytrage, und ſchließt alſo, der <lb/>Euleriſchen Hypotheſe gemäß, daß der Hauptunterſchied <lb/>zwiſchen Leitern und Nicht – Leitern in der Größe der <lb/>Zwiſchenräume zwiſchen den Beſtandtheilen der Körper <lb/>beſtehe.</s>
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469 <s xml:id="echoid-s203" xml:space="preserve"/>
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470 </p>
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471 <p>
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472 <s xml:id="echoid-s204" xml:space="preserve">In einer andern wichtigen Abhandlung, welche ſich <lb/>in den Schriften der Berliner Akademie vom Jahre 1779 <lb/>befindet, zeigt Herr Achard die Aehnlichkeit zwiſchen der <lb/>Erregung und den Wirkungen der Elektricität und der <lb/>Wärme; </s>
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473 <s xml:id="echoid-s205" xml:space="preserve">ingleichen zwiſchen der leitenden Eigenſchaft der <lb/>Körper und ihrer Empfänglichkeit für die Hitze. </s>
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474 <s xml:id="echoid-s206" xml:space="preserve">Er be-<lb/>ſchreibt zugleich ein neues Werkzeug, wodurch man die <lb/>Menge von elektriſcher Materie beſtimmen kann, welche <lb/>von Körpern verſchiedener Art, unter übrigens gleichen <lb/>Umſtänden, fortgeleitet wird. </s>
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475 <s xml:id="echoid-s207" xml:space="preserve">Mit Hülfe dieſes Inſtru-<lb/>ments läßt sich mit großer Genauigkeit die Menge von <lb/>Elektricität beſtimmen, welche ein Körper in einer gegeb-<lb/>nen Zeit verliert, wenn er einen andern nicht elektriſirten <lb/>Körper berühret. </s>
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476 <s xml:id="echoid-s208" xml:space="preserve">Noch hat er den Erfolg ſeiner damit <lb/>angeſtellten Verſuche nicht bekannt gemacht; </s>
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477 <s xml:id="echoid-s209" xml:space="preserve">doch behaup-<lb/>tet er immer bemerkt zu haben, daß diejenigen Körper, <lb/>welche den jedesmaligen Grad der Wärme ſchwer anneh-<lb/>men und lang behalten, auch die Elektricität ſchwer an-<lb/>nehmen und verlieren. </s>
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478 <s xml:id="echoid-s210" xml:space="preserve">Die Beſchreibung des erwähnten <lb/>Inſtruments wird man weiter unten in dieſem Verſuche <lb/>finden.</s>
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479 <s xml:id="echoid-s211" xml:space="preserve"/>
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480 </p>
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481 <pb o="11" file="0031" n="31" rhead="Von der Elektricität überhaupt."/>
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482 </div>
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483 <div xml:id="echoid-div20" type="section" level="1" n="19">
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484 <head xml:id="echoid-head21" xml:space="preserve">Verzeichniß</head>
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485 <p>
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486 <s xml:id="echoid-s212" xml:space="preserve">elektriſcher Subſtanzen und der verſchiedenen Elek-<lb/>tricitäten, welche ſie beym Reiben erhalten.</s>
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487 <s xml:id="echoid-s213" xml:space="preserve"/>
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488 </p>
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489 <note position="right" xml:space="preserve"> <lb/>Katzenhaar # poſitiv # Jede Subſtanz, mit welcher \\ man bisher den Verſuch an- \\ geſtellet hat. <lb/>Glattes Glas # poſitiv # Jede Subſtanz, mit der man \\ es bisher verſucht hat, das \\ Katzenhaar ausgenommen. <lb/>Mattgeſchliffe- \\ nes Glas # poſitiv # Trockner Wachstaffet, Schwefel, \\ Metalle. <lb/># negativ # Wollenzeug, Federkiel, Holz, \\ Papier, Siegellak, weißes \\ Wachs, die Hand. <lb/>Turmalin – # poſitiv # Bernſtein, Luſt. <anchor type="note" xlink:href="" symbol="*)"/>
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490 # negativ # Diamant, die Hand. <lb/>Haſenfell – # poſitiv # Metalle, Seide, Magnetſtein, \\ Leder, die Hand, Papier, \\ g@dörrtes Holz. <lb/># negativ # Andere feinere Felle. <lb/>Weiße Seide # poſitiv # Schwarze Seide, Metalle, \\ ſchwarz Tuch. <lb/># negativ # Papier, die Hand, Haare, Wie- \\ ſelfell. <lb/></note>
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491 <note symbol="*)" position="foot" xml:space="preserve">D. h. wenn man mit Blaſebälgen barauf bläſet. <lb/>Durch dieſes Mittel läßt ſich in vielen Körpern die Elektrici-<lb/>tät erregen; bey einigen noch beſſer. wenn die darauf ge-<lb/>blaſene Luft warm iſt, ob man gleich allemahl nur eine ſehr <lb/>ſchwache Elektricität erhält.</note>
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492 <pb o="12" file="0032" n="32" rhead="Erſtes Capitel."/>
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493 <note position="right" xml:space="preserve"> <lb/>Schwarze Sei- \\ de # poſitiv # Siegellak. <lb/># negativ # Haſen – Wieſel – und Iltisfelle, \\ Magnetſtein, Meſſing, Sil- \\ ber, Eiſen, die Hand. <lb/>Siegellak – # poſitiv # Metalle. <lb/># negativ # Haſen – Wieſel – und Iltisfelle, \\ die Hand, Leder, wollen Zeug, \\ Papier. <lb/>Gedörrtes Holz # poſitiv # Seide. <lb/># negativ # Flanell. <lb/></note>
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494 <p>
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495 <s xml:id="echoid-s214" xml:space="preserve">Viele dem Anſcheine nach ganz unbedeutende Um-<lb/>ſtände machen Aenderungen in dieſen entgegengeſetzten <lb/>Elektricitäten. </s>
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496 <s xml:id="echoid-s215" xml:space="preserve">Man hat behauptet, daß beym Reiben <lb/>zwoer gleichartigen Subſtanzen diejenige die negative <lb/>Elektricität erhalte, welche am ſtärkſten gerieben, oder am <lb/>meiſten erwärmt wird. </s>
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497 <s xml:id="echoid-s216" xml:space="preserve">Dies trifft zwar in vielen Fällen, <lb/>beſonders in Abſicht auf ſeidne Bänder, wirklich zu. </s>
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498 <s xml:id="echoid-s217" xml:space="preserve">Den-<lb/>noch aber ſagt Herr Bergmann, ein ſchwarzes Band <lb/>werde nie poſitiv, wenn nicht das andere, an dem es ge-<lb/>rieben wird, ebenfalls ſchwarz ſey. </s>
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499 <s xml:id="echoid-s218" xml:space="preserve">Bey Glasſtücken iſt <lb/>die Wirkung gerade die entgegengeſetzte; </s>
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500 <s xml:id="echoid-s219" xml:space="preserve">denn wenn ſie <lb/>beyde gleich groß ſind, ſo wird das Stück, A, welches <lb/>über das andere unbewegliche B geführt wird, negativ; </s>
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501 <s xml:id="echoid-s220" xml:space="preserve">B <lb/>hingegen wird poſitiv, ob es gleich die ſtärkſte Reibung lei-<lb/>det. </s>
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502 <s xml:id="echoid-s221" xml:space="preserve">Erwärmung am Feuer thut eben die Wirkung, wie <lb/>ſtärkeres Reiben. </s>
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503 <s xml:id="echoid-s222" xml:space="preserve">Iſt ein Stück Glas dicker, als das <lb/>andere, ſo wird das dickere poſitiv, das dünnere negativ. <lb/></s>
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504 <s xml:id="echoid-s223" xml:space="preserve">Gefärbtes Glas wird, auch erwärmt, negativ, wenn es <lb/>an gemeinem weißen Glaſe gerieben wird. </s>
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505 <s xml:id="echoid-s224" xml:space="preserve">Reibt man <lb/>blaues Glas an grünem, ſo wird das blaue ſtark poſitiv 2c. </s>
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506 <s xml:id="echoid-s225" xml:space="preserve"><lb/>Man ſ. </s>
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507 <s xml:id="echoid-s226" xml:space="preserve">Bergmanns Abhandlung in den Schriften der <lb/>königl. </s>
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508 <s xml:id="echoid-s227" xml:space="preserve">ſchwediſchen Akademie der Wiſſenſchaft vom Iah-<lb/>re 1765.</s>
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509 <s xml:id="echoid-s228" xml:space="preserve"/>
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510 </p>
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511 <pb o="13" file="0033" n="33" rhead="Von der Elektricität überhaupt,"/>
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512 <p>
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513 <s xml:id="echoid-s229" xml:space="preserve">Wenn man Haar und Glas an einander reibt, ſo <lb/>ſcheinen die dadurch erzeugten Elektricitäten einander das <lb/>Gleichgewicht zu halten, und find alſo nach der verſchie-<lb/>denen Art des Reibens und nach der Beſchaffenheit des <lb/>Haares verſchieden.</s>
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514 <s xml:id="echoid-s230" xml:space="preserve"/>
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515 </p>
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516 <p>
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517 <s xml:id="echoid-s231" xml:space="preserve">Reibt man Haare eines lebenden Thieres, oder <lb/>friſch abgeſchnittene Haare mit einer Glasröhre der Länge <lb/>nach, ſo werden ſie poſitiv, und das Glas, welches hier <lb/>die ſtärkſte Reibung leidet, wird negativ. </s>
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518 <s xml:id="echoid-s232" xml:space="preserve">Wird aber <lb/>die Glasröhre queer über den Rücken des Thieres, oder <lb/>über ein friſches Fell g@zogen, ſo wird das Glas poſitiv. <lb/></s>
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519 <s xml:id="echoid-s233" xml:space="preserve">Altes trocknes Haar, an Glas oder an friſchem Haare ge-<lb/>rieben, wird allezeit negativ; </s>
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520 <s xml:id="echoid-s234" xml:space="preserve">wenn man es aber ein we-<lb/>nlg mit Talg beſtreicht, ſo thut es eben die Wirkung, wie <lb/>friſches Haar. </s>
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521 <s xml:id="echoid-s235" xml:space="preserve">Man ſ. </s>
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522 <s xml:id="echoid-s236" xml:space="preserve">Wilke in den Abh. </s>
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523 <s xml:id="echoid-s237" xml:space="preserve">der königl. </s>
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524 <s xml:id="echoid-s238" xml:space="preserve"><lb/>ſchwed. </s>
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525 <s xml:id="echoid-s239" xml:space="preserve">Akad. </s>
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526 <s xml:id="echoid-s240" xml:space="preserve">vom Jahre 1769.</s>
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527 <s xml:id="echoid-s241" xml:space="preserve"/>
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528 </p>
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529 <p>
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530 <s xml:id="echoid-s242" xml:space="preserve">Die elektriſchen Körper ſind in Abſicht auf die Leich-<lb/>tigkeit, mit welcher ſich ihre Elektricität erregen läßt, in-<lb/>gleichen in Abſicht auf die Stärke und Dauer ihrer Elek-<lb/>tricität ſehr von einander verſchieden.</s>
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531 <s xml:id="echoid-s243" xml:space="preserve"/>
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532 </p>
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533 <p>
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534 <s xml:id="echoid-s244" xml:space="preserve">Die Seide ſcheint in Rückſicht auf ihre lang anhal-<lb/>tende und ſtarke anziehende und zurückſtoßende Kraft den <lb/>Vorzug vor allen andern elektriſchen Körpern zu ver-<lb/>dienen.</s>
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535 <s xml:id="echoid-s245" xml:space="preserve"/>
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536 </p>
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537 <p>
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538 <s xml:id="echoid-s246" xml:space="preserve">Das Glas hat den Vortheil, daß es das elektriſche <lb/>Licht und das Anziehen und Zurückſtoßen in einem ſehr <lb/>ſchnellen Fortgange und ſtark zeiget, aber ohne lang an, <lb/>haltende Dauer.</s>
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539 <s xml:id="echoid-s247" xml:space="preserve"/>
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540 </p>
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541 <p>
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542 <s xml:id="echoid-s248" xml:space="preserve">Die negativen elektriſchen Körper, z. </s>
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543 <s xml:id="echoid-s249" xml:space="preserve">B. </s>
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544 <s xml:id="echoid-s250" xml:space="preserve">Bernſtein, <lb/>Gummilak, Schwefel, Harz und alle harzige Subſtan-<lb/>zen zeigen die elektriſchen Erſcheinungen am längſten und <lb/>anhaltendſten. </s>
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545 <s xml:id="echoid-s251" xml:space="preserve">Bey günſtigen Umſtänden iſt eine einzi-<lb/>ge Erregung auf viele Wochen hinreichend. </s>
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546 <s xml:id="echoid-s252" xml:space="preserve">Eben dieſe
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547 <pb o="14" file="0034" n="34" rhead="Zweytes Capitel."/>
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548 Körper ſind auch darum merkwürdig, weil ſie den Leitern, <lb/>die mit ihnen in Berührung kommen, eine ſehr ſtarke <lb/>elektriſche Kraft mittheilen, und auch dieſe Mittheilung <lb/>eine beträchtliche Zeit lang fortſetzen.</s>
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549 <s xml:id="echoid-s253" xml:space="preserve"/>
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550 </p>
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551 </div>
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552 <div xml:id="echoid-div21" type="section" level="1" n="20">
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553 <head xml:id="echoid-head22" xml:space="preserve">Zweytes Capitel. <lb/>Von den Elektriſirmaſchinen, nebſt Anweiſungen <lb/>zu ihrem Gebrauch.</head>
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554 <p>
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555 <s xml:id="echoid-s254" xml:space="preserve">Sobald man die Eigenſchaften der Elektricität nur ei-<lb/>nigermaßen entwickelt hatte, ſo beſtrebten ſich Na-<lb/>turforſcher und Künſtler, eine Menge Maſchinen zu Er-<lb/>regung und Anhäufung dieſer außerordentlichen Kraft an-<lb/>zugeben und zu verfertigen. </s>
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556 <s xml:id="echoid-s255" xml:space="preserve">Seitdem aber die Kennt-<lb/>niſſe der Elektricität zugenommen haben,@ und die Gren-<lb/>zen dieſer Wiſſenſchaft erweitert worden ſind, hat man <lb/>dieſe Maſchinen größtentheils wieder auf die Seite gelegt. <lb/></s>
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557 <s xml:id="echoid-s256" xml:space="preserve">Ich will daher nur diejenige Elektriſirmaſchine beſchrei-<lb/>ben, welche jetzt allgemein im Gebrauch iſt. </s>
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558 <s xml:id="echoid-s257" xml:space="preserve">Ihre Ein-<lb/>richtung iſt höchſt einfach, und ſehr wohl geſchickt, die <lb/>elektriſche Materie nicht allein in großer Menge zu erre-<lb/>gen, ſondern auch in einem ſtarken und anhaltenden <lb/>Strome in den erſten Leiter überzuführen.</s>
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559 <s xml:id="echoid-s258" xml:space="preserve"/>
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560 </p>
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561 <p>
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562 <s xml:id="echoid-s259" xml:space="preserve">Taf. </s>
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563 <s xml:id="echoid-s260" xml:space="preserve">I. </s>
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564 <s xml:id="echoid-s261" xml:space="preserve">Fig. </s>
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565 <s xml:id="echoid-s262" xml:space="preserve">1 und 2. </s>
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566 <s xml:id="echoid-s263" xml:space="preserve">ſtellen zwo nach dieſer allge-<lb/>mein beliebten Einrichtung gearbeitete Maſchinen vor. <lb/></s>
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567 <s xml:id="echoid-s264" xml:space="preserve">Beyde werden auf einerley Art aufgeſtellet und gebraucht; </s>
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568 <s xml:id="echoid-s265" xml:space="preserve"><lb/>ſie ſind bloß in Abſicht auf den Mechaniſmus unterſchie-<lb/>den, durch welchen der Cylinder in Bewegung geſetzt <lb/>wird.</s>
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569 <s xml:id="echoid-s266" xml:space="preserve"/>
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570 </p>
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571 <p>
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572 <s xml:id="echoid-s267" xml:space="preserve">In Fig. </s>
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573 <s xml:id="echoid-s268" xml:space="preserve">2. </s>
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574 <s xml:id="echoid-s269" xml:space="preserve">wird der Cylinder vermittelſt zweyer <lb/>Räder ab, cd umgedrehet, welche durch eine Schnur <lb/>verbunden ſind, von der man bey e und f einen Theil ſehen <lb/>kan; </s>
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575 <s xml:id="echoid-s270" xml:space="preserve">in Fig. </s>
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576 <s xml:id="echoid-s271" xml:space="preserve">1. </s>
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577 <s xml:id="echoid-s272" xml:space="preserve">hingegen wird er durch eine bloße Kurbel
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578 <pb o="15" file="0035" n="35" rhead="Von den Elektriſirmaſchinen."/>
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579 bewegt, welche Einrichtung einfacher iſt, und nicht ſo leicht <lb/>in Unordnung geräth. </s>
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580 <s xml:id="echoid-s273" xml:space="preserve">Dennoch ziehen viele praktiſche <lb/>Liebhaber der Elektricität eine Maſchine mit mehrern ver-<lb/>bundenen Rädern vor. </s>
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581 <s xml:id="echoid-s274" xml:space="preserve">Sie ſagen, der Operator werde <lb/>dadurch nicht ſo ſehr, als durch das Umdrehen der bloßen <lb/>Kurbel, ermüdet; </s>
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582 <s xml:id="echoid-s275" xml:space="preserve">und eine mäßige Verſtärkung der Ge-<lb/>ſchwindigkeit des Cylinders vermehre die Bewegung der <lb/>elektriſchen Materie, und bringe in eben derſelben Zeit <lb/>eine größere Menge Materie hervor, daher ſie das Küſſen <lb/>nicht ſo leicht einſchlucken könne.</s>
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583 <s xml:id="echoid-s276" xml:space="preserve"/>
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584 </p>
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585 <p>
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586 <s xml:id="echoid-s277" xml:space="preserve">Da beyde Maſchinen, Taf. </s>
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587 <s xml:id="echoid-s278" xml:space="preserve">I. </s>
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588 <s xml:id="echoid-s279" xml:space="preserve">Fig. </s>
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589 <s xml:id="echoid-s280" xml:space="preserve">1 und 2. </s>
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590 <s xml:id="echoid-s281" xml:space="preserve">ein-<lb/>ander ſo ähnlich ſind, ſo kann ich bey ihrer Beſchreibung für <lb/>beyde einerley Buchſtaben gebrauchen.</s>
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591 <s xml:id="echoid-s282" xml:space="preserve"/>
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592 </p>
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593 <p>
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594 <s xml:id="echoid-s283" xml:space="preserve">A B C iſt das Fußbret der Maſchine, auf welchem <lb/>die beyden Stützen D und E, die den gläſernen Cylinder <lb/>F G H I tragen, feſt aufſtehen. </s>
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595 <s xml:id="echoid-s284" xml:space="preserve">Die Axe, an welcher <lb/>der Cylinder gedrehet wird, iſt in zwo Hauben befeſtigt, <lb/>welche bisweilen von Meſſing, bisweilen von Holz, ge-<lb/>macht werden; </s>
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596 <s xml:id="echoid-s285" xml:space="preserve">an jedes Ende des Cylinders iſt eine von <lb/>dieſen Hauben angeküttet, die man in den Figuren bey <lb/>K ſiebet. </s>
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597 <s xml:id="echoid-s286" xml:space="preserve">Die in der Haube K befeſtigte Are geht durch <lb/>die Stütze D; </s>
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598 <s xml:id="echoid-s287" xml:space="preserve">ans Ende dieſer Are iſt entweder, wie in <lb/>Fig. </s>
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599 <s xml:id="echoid-s288" xml:space="preserve">1. </s>
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600 <s xml:id="echoid-s289" xml:space="preserve">eine bloße Kurbel, oder wie in Fig. </s>
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601 <s xml:id="echoid-s290" xml:space="preserve">2.</s>
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602 <s xml:id="echoid-s291" xml:space="preserve">, ein Wür-<lb/>tel angepaßt, Die Are der andern Haube läuft in einem <lb/>kleinen Zapfenloche im obern Theile der Stütze E. </s>
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603 <s xml:id="echoid-s292" xml:space="preserve">OP <lb/>iſt eine Glasſäule, welche das Küſſen trägt; </s>
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604 <s xml:id="echoid-s293" xml:space="preserve">T, eine <lb/>meſſingene Schraube am Fuße dieſer Säule, dient den <lb/>Druck des Küſſens gegen den Cylinder zu reguliren; </s>
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605 <s xml:id="echoid-s294" xml:space="preserve">g h i <lb/>ein Stück Seidenzeug, welches von dem untern Rande <lb/>des Küſſens aus, und über den Cylinder ſo weit hinweg-<lb/>geht, daß es faſt an den Collector, oder an die einſaugen-<lb/>den Spitzen des erſten Leiters anſtößt. </s>
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606 <s xml:id="echoid-s295" xml:space="preserve">Oben an der <lb/>Glasſäule O P befindet ſich ein hölzerner Arm, welcher <lb/>einen mit dem Küſſen verbundenen Conduktor, oder den <lb/>ſogenannten negativen Conduktor trägt. </s>
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607 <s xml:id="echoid-s296" xml:space="preserve">In beyden Fi-<lb/>guren wird derſelbe hart am Küſſen anliegend und mit
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608 <pb o="16" file="0036" n="36" rhead="Zweytes Capitel."/>
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609 dem Glascylinder parallel laufend vorgeſtellt. </s>
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610 <s xml:id="echoid-s297" xml:space="preserve">In Fig. </s>
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611 <s xml:id="echoid-s298" xml:space="preserve">1 <lb/>iſt er etwas zu weit vorwärts und der Kurbel zu nahe ge-<lb/>rückt, damit man bey R S etwas davon zu ſehen bekom-<lb/>me; </s>
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612 <s xml:id="echoid-s299" xml:space="preserve">in Fig. </s>
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613 <s xml:id="echoid-s300" xml:space="preserve">2. </s>
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614 <s xml:id="echoid-s301" xml:space="preserve">ſieht man bloß das Ende R S.</s>
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615 <s xml:id="echoid-s302" xml:space="preserve"/>
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616 </p>
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617 <p>
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618 <s xml:id="echoid-s303" xml:space="preserve">Y Z, Fig. </s>
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619 <s xml:id="echoid-s304" xml:space="preserve">1 und 2, iſt der poſitive erſte Leiter, oder <lb/>derjenige, welcher die Elektricität unmittelbar aus dem <lb/>Cylinder erhält, L M die Glasſäule, welche ihn trägt und <lb/>iſolirt, und V X der hölzerne Fuß dieſer Glasſäule. </s>
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620 <s xml:id="echoid-s305" xml:space="preserve">In <lb/>Fig. </s>
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621 <s xml:id="echoid-s306" xml:space="preserve">1 iſt dieſer Conduktor mit dem Glascylinder parallel <lb/>geſtellt; </s>
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622 <s xml:id="echoid-s307" xml:space="preserve">Fig. </s>
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623 <s xml:id="echoid-s308" xml:space="preserve">2 aber ſteht er gegen den Cylinder recht-<lb/>winklicht; </s>
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624 <s xml:id="echoid-s309" xml:space="preserve">man kan ihm nach Befinden der Umſtände, und <lb/>ſo, wie es dem Operator am bequemſten fällt, entweder <lb/>die eine, oder die andere Stellung geben.</s>
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625 <s xml:id="echoid-s310" xml:space="preserve"/>
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626 </p>
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627 <p>
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628 <s xml:id="echoid-s311" xml:space="preserve">Soll der negative Conduktor ebenfalls rechtwinklicht <lb/>gegen den Cylinder, und mit dem Conduktor Y Z, Fig. <lb/></s>
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629 <s xml:id="echoid-s312" xml:space="preserve">2, parallel ſtehen, ſo muß er auf ein iſolirendes Stativ <lb/>befeſtiget, und durch einen unter dem Cylinder hindurch-<lb/>gehenden Drath mit dem Küſſen verbunden werden.</s>
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630 <s xml:id="echoid-s313" xml:space="preserve"/>
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631 </p>
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632 </div>
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633 <div xml:id="echoid-div22" type="section" level="1" n="21">
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634 <head xml:id="echoid-head23" xml:space="preserve">7. Verſuch.</head>
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635 <p>
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636 <s xml:id="echoid-s314" xml:space="preserve">Man drehe die Maſchine, und verbinde das Küſſen <lb/>durch eine Kette mit dem Fußboden des Zimmers, ſo <lb/>werden die Körper, welche mit dem poſitiven Conduktor <lb/>verbunden ſind, poſitiv elektriſirt werden.</s>
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637 <s xml:id="echoid-s315" xml:space="preserve"/>
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638 </p>
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639 <p>
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640 <s xml:id="echoid-s316" xml:space="preserve">Verbindet man hingegen den poſitiven Conduktor <lb/>burch eine Kette mit der Erde, und nimmt die Kette vom <lb/>Küſſen hinweg, ſo werden die Körper, welche mit dem <lb/>negativen Conduktor verbunden ſind, negativ elektriſiret.</s>
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641 <s xml:id="echoid-s317" xml:space="preserve"/>
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642 </p>
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643 <p>
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644 <s xml:id="echoid-s318" xml:space="preserve">Die vornehmſten Theile einer Elektriſirmaſchine ſind <lb/>folgende:</s>
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645 <s xml:id="echoid-s319" xml:space="preserve"/>
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646 </p>
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647 <p>
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648 <s xml:id="echoid-s320" xml:space="preserve">1) Der elektriſche Körper, hier der Glascylinder.</s>
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649 <s xml:id="echoid-s321" xml:space="preserve"/>
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650 </p>
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651 <p>
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652 <s xml:id="echoid-s322" xml:space="preserve">2) Die mechaniſche Vorrichtung, durch welche der <lb/>Cylinder bewegt wird.</s>
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653 <s xml:id="echoid-s323" xml:space="preserve"/>
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654 </p>
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655 <p>
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656 <s xml:id="echoid-s324" xml:space="preserve">3) Das Küſſen nebſt Zubehör.</s>
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657 <s xml:id="echoid-s325" xml:space="preserve"/>
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658 </p>
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659 <p>
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660 <s xml:id="echoid-s326" xml:space="preserve">4) Die zween erſten Leiter.</s>
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661 <s xml:id="echoid-s327" xml:space="preserve"/>
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662 </p>
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663 <pb o="17" file="0037" n="37" rhead="Von den Elektriſtrmaſchinen."/>
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664 <p>
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665 <s xml:id="echoid-s328" xml:space="preserve">Ehe man die Elektriſirmaſchine drehet, unterſuche <lb/>man vorher diejenigen Theile, welche durch das Reiben <lb/>oder durch Schmuz und Sand zwiſchen den reibenden Flä-<lb/>chen beſchädigt werden könnten, beſonders die Aren, wel-<lb/>che in den hölzernen Stützen D und E umlaufen, und die <lb/>Zapfen des großen Rades c d Fig. </s>
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666 <s xml:id="echoid-s329" xml:space="preserve">2. </s>
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667 <s xml:id="echoid-s330" xml:space="preserve">Wenn man das <lb/>Küſſen wegnimmt, ſo muß der Cylinder vollkommen frey <lb/>umlaufen. </s>
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668 <s xml:id="echoid-s331" xml:space="preserve">Hört man beym Umdrehen deſſelben ein Kra-<lb/>tzen oder ein anderes unangenehmes Geräuſch, ſo ſuche <lb/>man die Stelle, von der es herkömmt, wiſche ſie rein ab, <lb/>und ſtreiche etwas ſehr weniges Unſchlitt darüb@r. </s>
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669 <s xml:id="echoid-s332" xml:space="preserve">Eben <lb/>ſo unterſuche man die Are des großen Rads c d Fig. </s>
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670 <s xml:id="echoid-s333" xml:space="preserve">2. <lb/></s>
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671 <s xml:id="echoid-s334" xml:space="preserve">Gelegentlich laſſe man einen Tropfen Oel auf die Are des <lb/>Cylinders fallen, unterſuche die Schrauben am Geſtell <lb/>und Cylinder, und ziehe ſie feſter an, wenn ſie locker ſind.</s>
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672 <s xml:id="echoid-s335" xml:space="preserve"/>
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673 </p>
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674 <p>
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675 <s xml:id="echoid-s336" xml:space="preserve">Den Glascylinder wiſche man ſorgfältig ab, um ihn <lb/>von der Feuchtigkeit zu befreyen, welche das Glas aus <lb/>der Luft an ſich nimmt; </s>
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676 <s xml:id="echoid-s337" xml:space="preserve">insbeſondere ſorge man dafür, <lb/>daß an den Enden des Cylinders nichts feuchtes bleibe. <lb/></s>
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677 <s xml:id="echoid-s338" xml:space="preserve">Iede daſelbſt zurückbleibende Näſſe leitet die Elektricität <lb/>aus dem Cylinder in die Stützen @c.</s>
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678 <s xml:id="echoid-s339" xml:space="preserve"/>
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679 </p>
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680 <p>
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681 <s xml:id="echoid-s340" xml:space="preserve">Man ſorge, daß kein Staub, keine Fäden oder Fa-<lb/>ſern auf dem Cylinder, dem Geſtell, den Leitern und den <lb/>iſolirenden Säulen bleiben; </s>
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682 <s xml:id="echoid-s341" xml:space="preserve">ſie würden die elektriſche Ma-<lb/>terie nach und nach zerſtreuen, und die Wirkung dec <lb/>Maſchine ſchwächen.</s>
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683 <s xml:id="echoid-s342" xml:space="preserve"/>
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684 </p>
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685 <p>
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686 <s xml:id="echoid-s343" xml:space="preserve">Man reibe den Cylinder zuerſt mit einem reinen <lb/>dichten, trocknen, warmen leinenen Tuche, oder mit <lb/>Waſchleder, und dann mit einem trocknen, warmen und <lb/>weichen Stück Seidenzeug; </s>
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687 <s xml:id="echoid-s344" xml:space="preserve">eben ſo verfahre man mit <lb/>allen gläſernen iſolirenden Säulen der Maſchine und des <lb/>übrigen Apparats: </s>
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688 <s xml:id="echoid-s345" xml:space="preserve">doch müſſen dieſe Säulen, weil ſie <lb/>überfirnißt ſind, gelinder als der Cylinder gerieben werden.</s>
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689 <s xml:id="echoid-s346" xml:space="preserve"/>
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690 </p>
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691 <p>
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692 <s xml:id="echoid-s347" xml:space="preserve">Bisweilen ſetzt man auch ein heißes Eiſen auf den <lb/>Fuß des Conductors, um die Feuchtigkeit abzudampfen, <lb/>welche den Verſuchen hinderlich ſeyn könnte.</s>
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693 <s xml:id="echoid-s348" xml:space="preserve"/>
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694 </p>
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695 <pb o="18" file="0038" n="38" rhead="Zweytes Capitel."/>
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696 <p>
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697 <s xml:id="echoid-s349" xml:space="preserve">Wenn man gute und wirkſame Mittel ausfindig <lb/>machen will, durch eine Elektriſirmaſchine die Elektricität <lb/>ſtark zu erregen@, ſo muß man ſich nothwendig Begriffe <lb/>von dem Mechaniſmus machen, durch welchen der Cylin-<lb/>der die elektriſche Materie aus dem Küſſen und den damit <lb/>verbundenen Körpern ausziehet. </s>
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698 <s xml:id="echoid-s350" xml:space="preserve">Ich will daher die <lb/>Muthmaßungen beyfügen, nach welchen ich ſelbſt gear-<lb/>beitet habe. </s>
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699 <s xml:id="echoid-s351" xml:space="preserve">Sie haben mich in Stand geſetzt, mit den <lb/>Maſchinen, welche durch meine Hände gegangen ſind, <lb/>allezeit eine ſehr ſtarke Elektricität zu erregen.</s>
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700 <s xml:id="echoid-s352" xml:space="preserve"/>
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701 </p>
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702 <p>
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703 <s xml:id="echoid-s353" xml:space="preserve">Ich halte dafür, daß da, wo das Küſſen genau an <lb/>den Cylinder anſchließt, der Widerſtand der Luft ge-<lb/>ſchwächt werde, oder eine Art von Vacuum entſtehe. <lb/></s>
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704 <s xml:id="echoid-s354" xml:space="preserve">Vermöge der Geſetze aller elaſtiſchen flüßigen Materien <lb/>dringt die elektriſche Materie dahin ein, wo ſie den we-<lb/>nigſten Widerſtand findet; </s>
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705 <s xml:id="echoid-s355" xml:space="preserve">in dem Augenblicke alſo, da <lb/>der Cylinder das Küſſen verläßt, ſtrömt elektriſche Ma-<lb/>terie in Menge aus. </s>
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706 <s xml:id="echoid-s356" xml:space="preserve">Je vollkommner nun die Berüh-<lb/>rung iſt, und je ſchneller ſie aufgehoben wird, deſto größer <lb/>iſt die Menge der aus dem Küſſen ausgehenden Materie. </s>
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707 <s xml:id="echoid-s357" xml:space="preserve"><lb/>Da aber die elektriſche Materie in dieſem Zuſtande begie-<lb/>rig in jede in der Nähe befindliche leitende Subſtanz ein-<lb/>dringt, ſo wird, wofern einiges Amalgama über der Stel-<lb/>le des Kiſſens liegt, die der Cylinder berührt, daſſelbe <lb/>einen Theil der elektriſchen Materie in ſich nehmen und in <lb/>das Behältniß, aus welchem er gekommen iſt, zurück-<lb/>führen.</s>
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708 <s xml:id="echoid-s358" xml:space="preserve"/>
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709 </p>
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710 <p>
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711 <s xml:id="echoid-s359" xml:space="preserve">Sind dieſe Muthmaßungen gegründet, ſo muß man, <lb/>um die Elektricität durch eine Maſchine ſtark zu erregen.</s>
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712 <s xml:id="echoid-s360" xml:space="preserve"/>
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713 </p>
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714 <p>
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715 <s xml:id="echoid-s361" xml:space="preserve">1) Die Theile des Küſſens ausſuchen, welche von <lb/>dem Glascylinder gedrückt werden.</s>
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716 <s xml:id="echoid-s362" xml:space="preserve"/>
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717 </p>
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718 <p>
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719 <s xml:id="echoid-s363" xml:space="preserve">2) Das Amalgama nur allein auf dieſe Theile <lb/>ſtreichen.</s>
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720 <s xml:id="echoid-s364" xml:space="preserve"/>
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721 </p>
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722 <p>
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723 <s xml:id="echoid-s365" xml:space="preserve">3) Die Berührungslinie zwiſchen dem Cylinder <lb/>und dem Küſſen ſo vollkommen, als möglich, machen.</s>
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724 <s xml:id="echoid-s366" xml:space="preserve"/>
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725 </p>
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726 <pb o="19" file="0039" n="39" rhead="Von den Elektriſirmaſchinen."/>
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727 <p>
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728 <s xml:id="echoid-s367" xml:space="preserve">4) Die geſammlete elektriſche Materie vor der Zer-<lb/>ſtreuung bewahren.</s>
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729 <s xml:id="echoid-s368" xml:space="preserve"/>
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730 </p>
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731 <p>
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732 <s xml:id="echoid-s369" xml:space="preserve">Um das Iahr 1772 verſuchte ich, auf die Vorder-<lb/>ſeite des Küſſens einen lockern ledernen Lappen zu legen; <lb/></s>
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733 <s xml:id="echoid-s370" xml:space="preserve">das Amalgama ward über den ganzen Lappen geſtrichen, <lb/>das Küſſen an den gehörigen Ort geſtellt, und der lederne <lb/>Lappen mehr oder weniger niederwärts oder vielmehr ein-<lb/>wärts gebogen, bis ich durch wiederholte Verſuche end-<lb/>lich die Stellung fand, in welcher die Wirkung am ſtärk-<lb/>ſten war; </s>
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734 <s xml:id="echoid-s371" xml:space="preserve">denn durch dieſes Mittel ward die Menge des <lb/>gegen den Cylinder wirkenden Amalgama vermindert. </s>
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735 <s xml:id="echoid-s372" xml:space="preserve">Na-<lb/>türlich führte mich dies darauf, die Breite des Küſſens zu <lb/>vermindern, und es ſo zu ſtellen, daß man es leicht erhö-<lb/>hen oder erniedrigen konnte.</s>
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736 <s xml:id="echoid-s373" xml:space="preserve"/>
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737 </p>
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738 <p>
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739 <s xml:id="echoid-s374" xml:space="preserve">Die Vortheile, welche ich durch dieſe Methode er-<lb/>hielt, wurden durch die Erfindung eines ſinnreichen Na-<lb/>turforſchers noch mehr vergrößert. </s>
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740 <s xml:id="echoid-s375" xml:space="preserve">Dieſer leimte ein <lb/>Stück Leder an ein großes Stück Kork, ſtrich ſein Amal-<lb/>gama auf das Leder, und rieb damit die Zone des Glas-<lb/>cylinders, welche gegen das Küſſen drückte. </s>
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741 <s xml:id="echoid-s376" xml:space="preserve">Durch dieſe <lb/>vortrefliche Erfindung wird die Berührungslinie zwiſchen <lb/>dem Cylinder und dem Küſſen ſehr vollkommen, die klei-<lb/>nern Zwiſchenräume des Glaſes werden mit dem Amal-<lb/>gama ausgefüllt, und die überflüßigen Theile deſſelben ſe-<lb/>tzen ſich an das Küſſen ab.</s>
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742 <s xml:id="echoid-s377" xml:space="preserve"/>
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743 </p>
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744 <p>
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745 <s xml:id="echoid-s378" xml:space="preserve">Beccaria giebt an, das ſo auf der Oberfläche des <lb/>Glaſes haftende Amalgama bilde eine ununterbrochene <lb/>Reihe von leitenden Theilchen, welche die elektriſche Ma-<lb/>terie in den erſten Leiter, und unter gewiſſen Umſtänden <lb/>wieder zurück in das Küſſen führten.</s>
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746 <s xml:id="echoid-s379" xml:space="preserve"/>
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747 </p>
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748 <p>
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749 <s xml:id="echoid-s380" xml:space="preserve">Ein anderer ſcharfſinniger Kenner der Elektricität <lb/>beſtimmt die Berührungslinie zwiſchen Cylinder und Küſ-<lb/>ſen dadurch, daß er mit aufgelöſeter weißer Farbe eine Li-<lb/>nie auf dem Cylinder zieht: </s>
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750 <s xml:id="echoid-s381" xml:space="preserve">beym Umdrehen ſetzt ſich dieſe <lb/>Farbe ans Küſſen ab, und bezeichnet die Stellen, welche ge-<lb/>gen den Cylinder drücken. </s>
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751 <s xml:id="echoid-s382" xml:space="preserve">Das Amalgama wird alsdann
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752 <pb o="20" file="0040" n="40" rhead="Zweytes Capitel."/>
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753 bloß an die Stellen geſtrichen, welche von der weißen Far-<lb/>be bezeichnet ſind.</s>
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754 <s xml:id="echoid-s383" xml:space="preserve"/>
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755 </p>
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756 <p>
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757 <s xml:id="echoid-s384" xml:space="preserve">Beyde Methoden führen zum Zweck. </s>
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758 <s xml:id="echoid-s385" xml:space="preserve">Wählt man <lb/>die erſte, ſo darf man kein Amalgama auf das Küſſen <lb/>ſtreichen; </s>
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759 <s xml:id="echoid-s386" xml:space="preserve">das auf den Cylinder geriebene und von demſel-<lb/>ben beym Umdrehen auf das Küſſen abgeſetzte, iſt ſchon <lb/>hinreichend, eine erſtaunliche Menge elektriſche Materie <lb/>hervorzubringen. </s>
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760 <s xml:id="echoid-s387" xml:space="preserve">Wenn man den Cylinder mit dem <lb/>amalgamirten Leder reiben will, ſo muß man das Stück <lb/>Wachstaffet oder ſchwarzen Taffet, welches über dem <lb/>Küſſen liegt, zurückſchlagen, und wenn zufälliger Weiſe <lb/>einige Theilchen Amalgama daran kleben, dieſelben ſorg-<lb/>fältig abwiſchen,</s>
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761 </p>
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762 <p>
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763 <s xml:id="echoid-s388" xml:space="preserve">Wenn die Elektricität des Cylinders ſchwächer wer-<lb/>den will, ſo kann man ſie leicht von neuem verſtärken, <lb/>wenn man den darüber liegenden Taffet zurückſchlägt, und <lb/>dann den Cylinder mit dem amalgamirten Leder reibt.</s>
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764 <s xml:id="echoid-s389" xml:space="preserve"/>
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765 </p>
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766 <p>
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767 <s xml:id="echoid-s390" xml:space="preserve">Ein wenig Unſchlitt über das Amalgama geſtrichen, <lb/>verſtärkt, wie man gefunden hat, das elektriſche Vermö-<lb/>gen des Cylinders.</s>
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768 <s xml:id="echoid-s391" xml:space="preserve"/>
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769 </p>
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770 </div>
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771 <div xml:id="echoid-div23" type="section" level="1" n="22">
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772 <head xml:id="echoid-head24" xml:space="preserve">8. Verſuch.</head>
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773 <p>
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774 <s xml:id="echoid-s392" xml:space="preserve">Wenn der Cylinder ſtark in Wirkung geſetzt iſt, ſo <lb/>geht eine Menge runder leuchtender Stralen aus dem <lb/>Küſſen; </s>
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775 <s xml:id="echoid-s393" xml:space="preserve">hält man aber eine Reihe metalliſcher Spitzen <lb/>dagegen, ſo verſchwinden ſie wieder. </s>
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776 <s xml:id="echoid-s394" xml:space="preserve">Die leitende Sub-<lb/>ſtanz des Metalls ſaugt die elektriſche Materie ein, noch <lb/>ehe ſie die Geſtalt dieſer Stralen annehmen, oder ſich in <lb/>die Luft zerſtreuen kann.</s>
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777 <s xml:id="echoid-s395" xml:space="preserve"/>
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778 </p>
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779 <p>
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780 <s xml:id="echoid-s396" xml:space="preserve">Wir ſehen hieraus, daß man, um den Verluſt der <lb/>erregten elektriſchen Materie zu verhüten, die Luft abhal-<lb/>ten müſſe, auf die Materie zu wirken, welche durch die <lb/>Erregung in Bewegung geſetzt wird. </s>
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781 <s xml:id="echoid-s397" xml:space="preserve">Denn die Luft wi-<lb/>derſteht nicht allein dem Ausgange der elektriſchen Mate-<lb/>rie, ſondern ſie zerſtreut auch die geſammlete Materie wie-
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782 <pb o="21" file="0041" n="41" rhead="Von den Elektriſirmaſchinen."/>
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783 der vermittelſt der leitenden Stäubgen, welche jederzeit <lb/>in ihr herumfliegen.</s>
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784 <s xml:id="echoid-s398" xml:space="preserve"/>
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785 </p>
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786 <p>
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787 <s xml:id="echoid-s399" xml:space="preserve">Dieſe Abſichten werden nun ſehr glücklich erreicht, <lb/>wenn man eine nicht leitende Subſtanz von der Berüh-<lb/>rungslinie an bis an die einſaugenden Spitzen des erſten <lb/>Leiters gehen läßt, und dieſe Spitzen in ihre Atmoſphäre <lb/>ſetzt. </s>
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788 <s xml:id="echoid-s400" xml:space="preserve">Iſt kein Amalgama auf das Küſſen geſtrichen, ſo <lb/>iſt ein bloßes Stück ſchwarzer Taffet, allenfalls ganz <lb/>leicht mit Wachs imprägnirt, hinreichend. </s>
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789 <s xml:id="echoid-s401" xml:space="preserve">Man befe-<lb/>ſtiget es an den untern Rand des Küſſens, und läßt es bis <lb/>an die einſaugenden Spitzen des Conduktors gehen. </s>
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790 <s xml:id="echoid-s402" xml:space="preserve">Iſt <lb/>aber das Amalgama auf dem Kiſſen, ſo thut ein Stück <lb/>Wachstaffet die beſten Dienſte.</s>
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791 <s xml:id="echoid-s403" xml:space="preserve"/>
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792 </p>
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793 <p>
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794 <s xml:id="echoid-s404" xml:space="preserve">Einer meiner Freunde erzählte mir, er habe vor ei-<lb/>nigen Iahren ein Stück ſchwarzen Seidenzeug gebraucht, <lb/>und daſſelbe über und über mit einem mit ein wenig <lb/>Wachs vermiſchten Amolgama imprägnirt, welches er <lb/>mit einem Schwamm in die Seide eingerieben habe. <lb/></s>
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795 <s xml:id="echoid-s405" xml:space="preserve">Sey die Kraft der Maſchine unter währendem Gebrauch <lb/>ſchwächer geworden, ſo habe er ſie dadurch wieder ver-<lb/>ſtärkt, daß er den amalgamirten Schwamm an den Cy-<lb/>linder gehalten und denſelben umgedrehet habe.</s>
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796 <s xml:id="echoid-s406" xml:space="preserve"/>
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797 </p>
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798 <p>
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799 <s xml:id="echoid-s407" xml:space="preserve">Oft iſt es ſehr vortheilhaft, den Wachstaffet oder <lb/>Seidenzeug vorher zu trocknen, ehe die Maſchine ge-<lb/>braucht wird.</s>
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800 <s xml:id="echoid-s408" xml:space="preserve"/>
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801 </p>
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802 <p>
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803 <s xml:id="echoid-s409" xml:space="preserve">Man muß nicht eher glauben, daß die Maſchine in <lb/>gutem Stande ſey, als bis ſie das elektriſche Licht in groſ-<lb/>ſer Menge ausſtrömt, und man aus dem Conductor ſtarke, <lb/>dichte und ſchnell auf einander folgende Funken erhält. <lb/></s>
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804 <s xml:id="echoid-s410" xml:space="preserve">Wird der Conductor weggenommen, ſo muß das Feuer <lb/>rund um den Cylinder leuchten und viele ſchöne leuchtende <lb/>Büſchel auswerfen.</s>
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805 <s xml:id="echoid-s411" xml:space="preserve"/>
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806 </p>
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807 <p>
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808 <s xml:id="echoid-s412" xml:space="preserve">Man ſchätzt gegenwärtig beſonders zwo Arten von <lb/>Amalgama. </s>
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809 <s xml:id="echoid-s413" xml:space="preserve">Die eine beſteht aus fünf Theilen Queckſil-<lb/>ber, und einem Theile Zink mit ein wenig Wachs zuſam-<lb/>mengeſchmolzen: </s>
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810 <s xml:id="echoid-s414" xml:space="preserve">die andere iſt das in den Kaufläden zu
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811 <pb o="22" file="0042" n="42" rhead="Zweytes Capitel."/>
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812 habende Aurum muſivum. </s>
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813 <s xml:id="echoid-s415" xml:space="preserve">Nach vielfältigen Proben <lb/>finde ich es dennoch ſchwer zu entſcheiden, welche Art die <lb/>beſte ſey.</s>
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814 <s xml:id="echoid-s416" xml:space="preserve"/>
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815 </p>
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816 <p>
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817 <s xml:id="echoid-s417" xml:space="preserve">Der nachfolgende Verſuch ſcheint die vorhergegange-<lb/>nen Muthmaßungen über den Mechaniſmus, durch wel-<lb/>chen die elektriſche Materie aus dem Küſſen und den da-<lb/>mit verbundenen Körpern gezogen wird, zu erläutern und <lb/>zu beſtätigen.</s>
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818 <s xml:id="echoid-s418" xml:space="preserve"/>
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819 </p>
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820 </div>
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821 <div xml:id="echoid-div24" type="section" level="1" n="23">
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822 <head xml:id="echoid-head25" xml:space="preserve">9. Verſuch.</head>
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823 <p>
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824 <s xml:id="echoid-s419" xml:space="preserve">Man zerbreche eine Stange Siegellak in zwey Stü-<lb/>cken; </s>
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825 <s xml:id="echoid-s420" xml:space="preserve">ſo werden die beyden Enden auf dem Bruche, die <lb/>ſich vorher berührten, entgegengeſetzte Elektricitäten zei-<lb/>gen; </s>
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826 <s xml:id="echoid-s421" xml:space="preserve">das eine wird poſitiv, das andere negativ elektriſirt <lb/>ſeyn.</s>
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827 <s xml:id="echoid-s422" xml:space="preserve"/>
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828 </p>
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829 <p>
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830 <s xml:id="echoid-s423" xml:space="preserve">Iede Elektriſirmaſchine muß mit einem iſolirten <lb/>Küſſen und mit zween Conductoren, einem zur poſitiven, <lb/>dem andern zur negativen Elektricität, verſehen ſeyn; </s>
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831 <s xml:id="echoid-s424" xml:space="preserve">auf <lb/>dieſe Art kann man beyde Elektricitäten nach Gefallen <lb/>hervorbringen, eine größere Anzahl Verſuche anſtellen, <lb/>und die Eigenſchaften der elektriſchen Materie leichter <lb/>erklären.</s>
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832 <s xml:id="echoid-s425" xml:space="preserve"/>
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833 </p>
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834 </div>
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835 <div xml:id="echoid-div25" type="section" level="1" n="24">
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836 <head xml:id="echoid-head26" xml:space="preserve">10. Verſuch.</head>
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837 <p>
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838 <s xml:id="echoid-s426" xml:space="preserve">Man verbinde den poſitiven Conductor durch eine <lb/>Kette mit dem Tiſche, und drehe den Cylinder, ſo wird <lb/>man das Küſſen negativ elektriſiret finden. </s>
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839 <s xml:id="echoid-s427" xml:space="preserve">Nun nehme <lb/>man die Kette von dem poſitiven Conductor hinweg, ſo <lb/>werden beyde, der Conductor und das Küſſen, Zeichen der <lb/>Elektricität von ſich geben; </s>
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840 <s xml:id="echoid-s428" xml:space="preserve">aber jeder elektriſirte Körper, <lb/>der von dem einen angezogen wird, wird von dem andern <lb/>zurückgeſtoßen werden. </s>
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841 <s xml:id="echoid-s429" xml:space="preserve">Bringt man beyde nahe genug <lb/>an einander, ſo werden Funken zwiſchen ihnen entſtehen, <lb/>und ſie werden auf einander ſelbſt ſtärker, als auf andere <lb/>Körper, wirken. </s>
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842 <s xml:id="echoid-s430" xml:space="preserve">Verbindet man ſie mit einander, ſo
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843 <pb o="23" file="0043" n="43" rhead="Von den Elektriſirmaſchinen."/>
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844 werden ſich beyder Elektricitäten unter einander aufheben; <lb/></s>
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845 <s xml:id="echoid-s431" xml:space="preserve">denn, obgleich die Elektricität aus dem Küſſen in den Con-<lb/>ductor überzugehen ſcheinet, ſo werden doch beyde, wenn <lb/>ſie verbunden ſind, kein Zeichen der Elektricität von ſich <lb/>geben, weil die elektriſche Materie beſtändig von einem <lb/>zum andern circuliret, und allezeit in eben demſelben <lb/>Zuſtande bleibt.</s>
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846 <s xml:id="echoid-s432" xml:space="preserve"/>
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847 </p>
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848 <p>
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849 <s xml:id="echoid-s433" xml:space="preserve">Wir ſehen aus dieſem Verſuche, daß die elektriſchen <lb/>Erſcheinungen ſowohl in dem elektriſchen Körper, welcher <lb/>gerieben wird, als auch in der Subſtanz, mit welcher <lb/>man ihn reibt, entſtehen, wofern nur dieſe Subſtanz iſo-<lb/>lirt iſt; </s>
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850 <s xml:id="echoid-s434" xml:space="preserve">aber beyder Elektricitäten ſind einander gerade <lb/>entgegengeſetzt, und geben ſich durch entgegengeſetzte Wir-<lb/>kungen zu erkennen.</s>
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851 <s xml:id="echoid-s435" xml:space="preserve"/>
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852 </p>
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853 </div>
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854 <div xml:id="echoid-div26" type="section" level="1" n="25">
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855 <head xml:id="echoid-head27" xml:space="preserve">11. Verſuch.</head>
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856 <p>
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857 <s xml:id="echoid-s436" xml:space="preserve">Sind der Conductor und das Kiſſen beyde iſolirt, ſo <lb/>erhält man deſto weniger elektriſche Materie, je vollkom-<lb/>mener die Iſolirung iſt.</s>
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858 <s xml:id="echoid-s437" xml:space="preserve"/>
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859 </p>
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860 <p>
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861 <s xml:id="echoid-s438" xml:space="preserve">Die Feuchtigkeit, welche ſich zu allen Zeiten in der <lb/>Luft befindet, und die ſeinen ſpitzigen Faſern, von welchen <lb/>man das Küſſen unmöglich ganz befreyen kan, laſſen keine <lb/>vollkommene Iſolirung des Küſſens zu, und machen, daß <lb/>der elektriſchen Materie immer noch einiger Zugang zu <lb/>demſelben übrig bleibt.</s>
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862 <s xml:id="echoid-s439" xml:space="preserve"/>
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863 </p>
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864 <p>
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865 <s xml:id="echoid-s440" xml:space="preserve">Wenn die Luſt und die andern Theile des Apparatus <lb/>ſehr trocken ſind, ſo wird man unter den oben beſchriebe-<lb/>nen Umſtänden wenig oder gar keine Elektricität erhalten.</s>
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866 <s xml:id="echoid-s441" xml:space="preserve"/>
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867 </p>
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868 <p>
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869 <s xml:id="echoid-s442" xml:space="preserve">Man hat aus dieſem Verſuche geſchloſſen, daß die <lb/>elektriſche Materie nicht blos in den elektriſchen Körpern <lb/>ſelbſt liege, ſondern durch das Reiben derſelben aus der <lb/>Erde gezogen werde; </s>
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870 <s xml:id="echoid-s443" xml:space="preserve">oder, daß die elektriſche Materie <lb/>des erſten Leiters nicht durch das Reiben des Cylinders am <lb/>Küſſen hervorgebracht, ſondern nur durch dieſe Ope-<lb/>ration aus dem Küſſen und den damit verbundenen Kör-<lb/>pern geſammlet werde.</s>
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871 <s xml:id="echoid-s444" xml:space="preserve"/>
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872 </p>
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873 <pb o="24" file="0044" n="44" rhead="Zweytes Capitel."/>
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874 <p>
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875 <s xml:id="echoid-s445" xml:space="preserve">Da D. </s>
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876 <s xml:id="echoid-s446" xml:space="preserve">Franklin dieſen Gedanken, daß die elektri-<lb/>ſche Materie aus der Erde geſammlet werde, zuerſt auf-<lb/>gebracht hat, ſo habe ich hier den Verſuch, der ihn auf <lb/>dieſe Schlußfolge leitete, nach ſeiner eignen Erzählung <lb/>beyfügen wollen.</s>
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877 <s xml:id="echoid-s447" xml:space="preserve"/>
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878 </p>
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879 </div>
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880 <div xml:id="echoid-div27" type="section" level="1" n="26">
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881 <head xml:id="echoid-head28" xml:space="preserve">12. Verſuch.</head>
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882 <p>
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883 <s xml:id="echoid-s448" xml:space="preserve">1) Man laſſe eine Perſon auf Pech treten und eine <lb/>Glasröhre reiben, eine andere aber, die ebenfalls auf <lb/>Pech ſtehet, einen Funken aus derſelben ziehen, ſo wer-<lb/>den beyde (wofern ſie nur nicht ſo nahe ſtehen, daß ſie <lb/>einander berühren) gegen eine dritte Perſon, welche auf <lb/>dem Boden des Zimmers ſtehet, Zeichen der Elektricität <lb/>von ſich geben. </s>
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884 <s xml:id="echoid-s449" xml:space="preserve">2) Wenn aber die auf Pech ſtehenden <lb/>Perſonen einander ſelbſt während des Reibens der Röhre <lb/>berühren, ſo findet ſich bey keiner von beyden ein Zei-<lb/>chen einer Elektricität. </s>
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885 <s xml:id="echoid-s450" xml:space="preserve">3) Wenn ſie einander nach dem <lb/>der Reiben der Röhre berühren, und wie vorher einen <lb/>Funken ausziehen, ſo wird der Funken zwiſchen ihnen <lb/>beyden ſtärker ſeyn, als der Funken zwiſchen einem von <lb/>ihnen und einer auf dem Boden ſtehenden Perſon. </s>
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886 <s xml:id="echoid-s451" xml:space="preserve">4) <lb/>Nach dieſem ſtarken Funken wird ſich an keinem von bey-<lb/>den weiter einige Elektricität zeigen.</s>
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887 <s xml:id="echoid-s452" xml:space="preserve"/>
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888 </p>
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889 <p>
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890 <s xml:id="echoid-s453" xml:space="preserve">Von dieſen Erſcheinungen giebt er folgende Erklä-<lb/>rung. </s>
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891 <s xml:id="echoid-s454" xml:space="preserve">Er nimmt an, die elektriſche Materie ſey ein ge-<lb/>meinſchaftliches Element, von welchem jede dieſer drey <lb/>Perſonen, ehe das Reiben der Nöhre anfieng, ein gleich <lb/>großes Maaß gehabt habe. </s>
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892 <s xml:id="echoid-s455" xml:space="preserve">A, welcher auf Pech ſteht, <lb/>und die Röhre reibt, giebt ſeine eigne elektriſche Materie <lb/>an das Glas ab, und da ſeine Verbindung mit der Erde <lb/>durch das Pech abgeſchnitten iſt, ſo wird dieſer Verluſt <lb/>ſeinem Körper nicht ſogleich wieder erſetzet. </s>
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893 <s xml:id="echoid-s456" xml:space="preserve">B, der eben-<lb/>falls auf Pech ſtehet, nimmt, indem er den Knöchel ſei-<lb/>nes Fingers längſt der Röhre hinführet, die aus dem Kör-<lb/>per des A geſammlete Materie an ſich, und behält dieſen <lb/>Ueberſchuß, weil er iſolirt iſt. </s>
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894 <s xml:id="echoid-s457" xml:space="preserve">C, der auf dem Boden
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895 <pb o="25" file="0045" n="45" rhead="Von den Elektriſirmaſchinen."/>
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896 ſteht, findet ſie alſo beyde elektriſiret; </s>
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897 <s xml:id="echoid-s458" xml:space="preserve">denn da er nur die <lb/>mittlere Quantität elektriſcher Materie in ſich hat, ſo er-<lb/>hält er einen Funken bey der Annäherung an B, welcher <lb/>Ueberſchuß hat, und giebt einen Funken an A, welcher <lb/>Mangel hat. </s>
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898 <s xml:id="echoid-s459" xml:space="preserve">Nähern ſich A und B einander ſelbſt, ſo iſt der <lb/>Funken ſtärker, weil der Unterſchied zwiſchen beyden größer <lb/>iſt. </s>
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899 <s xml:id="echoid-s460" xml:space="preserve">Nach der Berührung zeigen ſich keine Funken mehr <lb/>zwiſchen ihnen und C, weil die elektriſche Materie bey allen <lb/>wieder zu ihrer urſprünglichen Gleichheit zurückgekommen <lb/>iſt. </s>
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900 <s xml:id="echoid-s461" xml:space="preserve">Berühren ſie einander währendem Reiben, ſo wird <lb/>die Gleichheit nicht geſtört, die Materie geht nur aus dem <lb/>einen in den andern über. </s>
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901 <s xml:id="echoid-s462" xml:space="preserve">Man ſagt daher, B ſey poſi-<lb/>tiv, A negativ elektriſiret.</s>
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902 <s xml:id="echoid-s463" xml:space="preserve"/>
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903 </p>
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904 </div>
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905 <div xml:id="echoid-div28" type="section" level="1" n="27">
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906 <head xml:id="echoid-head29" xml:space="preserve">Beſchreibung <lb/>einiger Theile der elektriſchen Geräthſchaft.</head>
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907 <p>
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908 <s xml:id="echoid-s464" xml:space="preserve">Taf. </s>
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909 <s xml:id="echoid-s465" xml:space="preserve">II. </s>
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910 <s xml:id="echoid-s466" xml:space="preserve">Fig. </s>
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911 <s xml:id="echoid-s467" xml:space="preserve">1. </s>
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912 <s xml:id="echoid-s468" xml:space="preserve">zeigt den gewöhnlichen Auslader <lb/>(diſcharging rod, excitateur); </s>
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913 <s xml:id="echoid-s469" xml:space="preserve">er wird insgemein von <lb/>meßingenem Drath gemacht, und iſt an beyden Enden mit <lb/>Knöpfen oder Kugeln verſehen. </s>
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914 <s xml:id="echoid-s470" xml:space="preserve">Will man eine Leidner <lb/>Flaſche damit entladen, ſo nimmt man den halbkreisför-<lb/>migen Theil in die Hand, ſetzt die eine Kugel an die Be-<lb/>legung der Flaſche, und bringt die andere gegen den Knopf <lb/>des ins Innere der Flaſche gehenden Draths. </s>
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915 <s xml:id="echoid-s471" xml:space="preserve">Es wird <lb/>alsdann eine Exploſion entſtehen, und die Flaſche entladen <lb/>werden.</s>
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916 <s xml:id="echoid-s472" xml:space="preserve"/>
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917 </p>
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918 <p>
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919 <s xml:id="echoid-s473" xml:space="preserve">Taf. </s>
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920 <s xml:id="echoid-s474" xml:space="preserve">II. </s>
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921 <s xml:id="echoid-s475" xml:space="preserve">Fig. </s>
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922 <s xml:id="echoid-s476" xml:space="preserve">2 iſt ein Auslader mit einem Char-<lb/>nier und gläſernen Handgrif. </s>
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923 <s xml:id="echoid-s477" xml:space="preserve">Man kan vermittelſt des <lb/>Charniers C ſeine beyden Schenkel bewegen, und in jede <lb/>beliebige Entfernung ſtellen. </s>
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924 <s xml:id="echoid-s478" xml:space="preserve">Die Enden dieſer Schenkel <lb/>ſind ſpitzig; </s>
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925 <s xml:id="echoid-s479" xml:space="preserve">man kan aber die Kugeln a, b über die Spi-<lb/>tzen ſchrauben, und nach Gefallen wieder abnehmen; </s>
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926 <s xml:id="echoid-s480" xml:space="preserve">ſo <lb/>daß man, je nachdem es erforderlich iſt, entweder die Ku-<lb/>geln oder die Spitzen gebrauchen kan.</s>
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927 <s xml:id="echoid-s481" xml:space="preserve"/>
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928 </p>
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929 <pb o="26" file="0046" n="46" rhead="Zweytes Capitel."/>
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930 <p>
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931 <s xml:id="echoid-s482" xml:space="preserve">Taf. </s>
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932 <s xml:id="echoid-s483" xml:space="preserve">II. </s>
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933 <s xml:id="echoid-s484" xml:space="preserve">Fig. </s>
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934 <s xml:id="echoid-s485" xml:space="preserve">3. </s>
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935 <s xml:id="echoid-s486" xml:space="preserve">zeigt den allgemeinen Auslader, <lb/>ein Inſtrument von ſehr ausgebreitetem Nutzen, wenn man <lb/>Verbindungen machen will, um den elektriſchen Schlag <lb/>durch einen Theil eines gegebenen Körpers zu führen. </s>
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936 <s xml:id="echoid-s487" xml:space="preserve">Es <lb/>werden im folgenden viele Beyſpiele von dem Gebrauche <lb/>dieſes Werkz@ugs vorkommen. </s>
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937 <s xml:id="echoid-s488" xml:space="preserve">Wenn dieſer allgemeine <lb/>Auslader e@was groß gemacht wird, ſo übertrift er alle <lb/>andere Werkzeuge, die man bisher angegeben hat, um <lb/>ſich ſelbſt elektriſiren zu können. </s>
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938 <s xml:id="echoid-s489" xml:space="preserve">A B iſt der hölzerne Fuß <lb/>des Inſtruments; </s>
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939 <s xml:id="echoid-s490" xml:space="preserve">auf dieſem ſtehen zwo ſenkrechte Glas-<lb/>ſäulen C D, auf deren jede eine meßingene Kappe geküttet <lb/>iſt. </s>
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940 <s xml:id="echoid-s491" xml:space="preserve">An dieſen Kappen beſindet ſich ein doppeltes Char-<lb/>nier, das man ſowohl vertical als horizontal drehen kan; <lb/></s>
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941 <s xml:id="echoid-s492" xml:space="preserve">oben an jedem Gelenk iſt eine fe@ernde Röhre, in welche <lb/>man die Dräthe E T, E F ſtecken kan. </s>
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942 <s xml:id="echoid-s493" xml:space="preserve">Dieſe Dräthe <lb/>laſſen ſich in jede beliebige Entfernung von einander ſtel-<lb/>len, und nach allen Richtungen d@ehen. </s>
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943 <s xml:id="echoid-s494" xml:space="preserve">Ihre Enden <lb/>ſind zugeſpitzt, man kan aber an die Spitzen erforderlichen <lb/>Falls die meßingenen Kugeln ſtecken, welche durch eine <lb/>Feder mit einem Drucker daran befeſtiget werden. </s>
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944 <s xml:id="echoid-s495" xml:space="preserve">G H <lb/>iſt ein kleines hölzernes Tiſchgen, auf deſſen oberer Fläche <lb/>ein Streif Elfenbein eingelegt iſt: </s>
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945 <s xml:id="echoid-s496" xml:space="preserve">dieſes Tiſchgen hat <lb/>einen cylindriſchen Fuß, welcher in die Höhlung der Säule <lb/>I paſſet; </s>
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946 <s xml:id="echoid-s497" xml:space="preserve">man kann es nach Befinden der Umſtände höher <lb/>oder niedriger ſtellen, und in jeder Stellung durch die <lb/>Schraube K befeſtigen.</s>
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947 <s xml:id="echoid-s498" xml:space="preserve"/>
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948 </p>
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949 <p>
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950 <s xml:id="echoid-s499" xml:space="preserve">Taſ. </s>
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951 <s xml:id="echoid-s500" xml:space="preserve">II. </s>
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952 <s xml:id="echoid-s501" xml:space="preserve">Fig. </s>
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953 <s xml:id="echoid-s502" xml:space="preserve">4. </s>
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954 <s xml:id="echoid-s503" xml:space="preserve">iſt eine kleine hölzerne Preſſe, mit <lb/>einem Stiele verſehen, der in die Höhlung der Säule I <lb/>Fig. </s>
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955 <s xml:id="echoid-s504" xml:space="preserve">3. </s>
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956 <s xml:id="echoid-s505" xml:space="preserve">paſſet, und in dieſelbe geſteckt werden kann, wenn <lb/>man das Tiſchgen G H weggenommen hat. </s>
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957 <s xml:id="echoid-s506" xml:space="preserve">Die Preſſe <lb/>beſteht aus zwey Bretgen, welche durch die Schrauben a a <lb/>hart an einander ge@rückt werden.</s>
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958 <s xml:id="echoid-s507" xml:space="preserve"/>
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959 </p>
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960 <p>
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961 <s xml:id="echoid-s508" xml:space="preserve">Taf. </s>
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962 <s xml:id="echoid-s509" xml:space="preserve">II. </s>
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963 <s xml:id="echoid-s510" xml:space="preserve">Fig. </s>
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964 <s xml:id="echoid-s511" xml:space="preserve">5. </s>
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965 <s xml:id="echoid-s512" xml:space="preserve">iſt des Herrn Rinnersley elektri-<lb/>ſches Luftthermometer. </s>
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966 <s xml:id="echoid-s513" xml:space="preserve">a b iſt eine Glasröhre, an <lb/>jedem Ende mit einer angekütteten meßingenen Kappe ver-
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967 <pb o="27" file="0047" n="47" rhead="Von den Electriſirmaſchinen."/>
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968 ſehen; </s>
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969 <s xml:id="echoid-s514" xml:space="preserve">c d eine engere an beyden Enden offene Glasröhre, <lb/>welche durch die obere Platte hindurch geht, und bis nahe <lb/>an die untere Platte reicht; </s>
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970 <s xml:id="echoid-s515" xml:space="preserve">an den obern Theil dieſer Röh-<lb/>re iſt eine buchsbäumene Scale befeſtiget, und in Zolle <lb/>und Zehntheile getheilt; </s>
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971 <s xml:id="echoid-s516" xml:space="preserve">g iſt ein meßingener Stab mit <lb/>einem Knopfe, den man in die untere Platte einſchraubet. <lb/></s>
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972 <s xml:id="echoid-s517" xml:space="preserve">Ein anderer ähnlicher Stab f h geht vermittelſt eines <lb/>luftdichten Leders durch die obere Platte, und kan in jede <lb/>beliebige Entfernung von dem untern Stabe geſtellt wer-<lb/>den.</s>
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973 <s xml:id="echoid-s518" xml:space="preserve"/>
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974 </p>
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975 <p>
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976 <s xml:id="echoid-s519" xml:space="preserve">Die Liebhaber der Elektricität haben ſchon längſt ein <lb/>Inſtrument gewünſcht, wodurch man auf eine genaue <lb/>und beſtimmte Art den Grad der Stärke der Elektricität <lb/>bey jedem Verſuche finden könnte. </s>
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977 <s xml:id="echoid-s520" xml:space="preserve">Man hat in dieſer <lb/>Abſicht ſehr viele Vorſchläge gethan und ausgeführt, die <lb/>aber bey angeſtellten Proben alle mangelhaft befunden <lb/>worden ſind.</s>
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978 <s xml:id="echoid-s521" xml:space="preserve"/>
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979 </p>
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980 <p>
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981 <s xml:id="echoid-s522" xml:space="preserve">Herr Achard, der dieſe Materie ſehr aufmerkſam <lb/>unterſucht hat, verlangt von einem Elektrometer fol-<lb/>gende Eigenſchaften.</s>
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982 <s xml:id="echoid-s523" xml:space="preserve"/>
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983 </p>
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984 <p>
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985 <s xml:id="echoid-s524" xml:space="preserve">1) Daß es einfach und nicht aus vielen Theilen zu-<lb/>ſammengeſetzt ſey.</s>
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986 <s xml:id="echoid-s525" xml:space="preserve"/>
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987 </p>
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988 <p>
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989 <s xml:id="echoid-s526" xml:space="preserve">2) Daß die Veränderungen der Atmoſphäre nicht <lb/>darauf wirken.</s>
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990 <s xml:id="echoid-s527" xml:space="preserve"/>
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991 </p>
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992 <p>
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993 <s xml:id="echoid-s528" xml:space="preserve">3) Daß es eben ſowohl kleine als große Grade der <lb/>Elektricität anzeige.</s>
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994 <s xml:id="echoid-s529" xml:space="preserve"/>
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995 </p>
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996 <p>
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997 <s xml:id="echoid-s530" xml:space="preserve">4) Daß es ſich auf kein willkührliches Maaß beziehe.</s>
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998 <s xml:id="echoid-s531" xml:space="preserve"/>
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999 </p>
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1000 <p>
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1001 <s xml:id="echoid-s532" xml:space="preserve">5) Daß die Stärke der Elektricität durch eine be-<lb/>ſtimmte unveränderliche Kraft, z. </s>
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1002 <s xml:id="echoid-s533" xml:space="preserve">B. </s>
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1003 <s xml:id="echoid-s534" xml:space="preserve">durch die Schwere, <lb/>ausgedrückt werde.</s>
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1004 <s xml:id="echoid-s535" xml:space="preserve"/>
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1005 </p>
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1006 <p>
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1007 <s xml:id="echoid-s536" xml:space="preserve">6) Daß der Obſervator die Theilungen bis auf eine <lb/>gewiſſe Entfernung ſehen könne, wodurch verhindert wird, <lb/>daß er den Einfluß der Elektricität nicht durch die Annä-<lb/>herung ſeines Körpers ſchwächen kan.</s>
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1008 <s xml:id="echoid-s537" xml:space="preserve"/>
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1009 </p>
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1010 <p>
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1011 <s xml:id="echoid-s538" xml:space="preserve">Taf. </s>
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1012 <s xml:id="echoid-s539" xml:space="preserve">II. </s>
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1013 <s xml:id="echoid-s540" xml:space="preserve">Fig. </s>
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1014 <s xml:id="echoid-s541" xml:space="preserve">6 ſtellt das Duadranten-elektrome-<lb/>ter vor, welches unter den bisher erfundenen Inſtrumen-
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1015 <pb o="28" file="0048" n="48" rhead="Zweytes Capitel."/>
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1016 ten dieſer Art das brauchbarſte iſt, theils um den Grad <lb/>der Elektricität eines Körpers zu meſſen, theils die Stärke <lb/>der Ladung vor der Erploſion zu beſtimmen, theils auch <lb/>den Zeitpunkt genau zu bemerken, in welchem ſich die <lb/>Elektricität einer Flaſche verändert, wenn ſie ohne Explo-<lb/>ſion entladen wird, indem man ihr eine gewiſſe Quantität <lb/>von der entgegengeſetzten Elektricität mittheilet. </s>
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1017 <s xml:id="echoid-s542" xml:space="preserve">Die <lb/>Säule L M wird insgemein von Holz, der graduirte Bo-<lb/>gen N O P von Elfenb@in, der Stab R S aber von ſehr <lb/>leichtem Holze mit einer Holundermarkkugel am Ende, ge-<lb/>macht; </s>
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1018 <s xml:id="echoid-s543" xml:space="preserve">der letztere dreht ſich um den Mittelpunkt des <lb/>Halbkreiſes ſo, daß er allezeit nahe an der Oberfläche <lb/>deſſelben bleibt; </s>
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1019 <s xml:id="echoid-s544" xml:space="preserve">das Ende der Säule L M kann entweder <lb/>an den Conductor oder an den Knopf einer Flaſche ange-<lb/>paſſet werden. </s>
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1020 <s xml:id="echoid-s545" xml:space="preserve">Wenn der Apparatus elektriſirt iſt, ſo <lb/>wird der Stab von der Säule zurückgeſtoſſen, bewegt ſich <lb/>längſt am getheilten Bogen des Halbkreiſes hin, und be-<lb/>zeichnet den Grad, bis auf welchen der Conductor elektri-<lb/>ſiret, oder bis auf welchen die Ladung der Flaſche geſtie-<lb/>gen iſt.</s>
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1021 <s xml:id="echoid-s546" xml:space="preserve"/>
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1022 </p>
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1023 <p>
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1024 <s xml:id="echoid-s547" xml:space="preserve">Beccaria räth an, den Zeiger zwiſchen zween Halb-<lb/>kreiſen zu befeſtigen, weil er, wenn er nur an einem ein-<lb/>zigen Halbkreiſe gehe, von der Elektricität deſſelben zurück-<lb/>geſtoßen werde, und ſich nicht frey bewegen könne. </s>
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1025 <s xml:id="echoid-s548" xml:space="preserve">Noch <lb/>andere Verbeſſerungen und Veränderungen dieſes Inſtru-<lb/>ments werden wir unten beſchreiben.</s>
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1026 <s xml:id="echoid-s549" xml:space="preserve"/>
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1027 </p>
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1028 <p>
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1029 <s xml:id="echoid-s550" xml:space="preserve">Taf. </s>
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1030 <s xml:id="echoid-s551" xml:space="preserve">II. </s>
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1031 <s xml:id="echoid-s552" xml:space="preserve">Fig. </s>
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1032 <s xml:id="echoid-s553" xml:space="preserve">9 iſt ein ſchon vor vielen Jahren von <lb/>Herrn Townſhend erfundenes Elektrometer, um die <lb/>jedesmalige Stärke der elektriſchen Exploſion zu meſſen. <lb/></s>
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1033 <s xml:id="echoid-s554" xml:space="preserve">a b iſt eine kleine elfenbeinerne Platte, c ein locker geſtell-<lb/>ter elſenbeinerner Kegel, der auf die Platte a b geſetzt <lb/>wird; </s>
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1034 <s xml:id="echoid-s555" xml:space="preserve">e f g eine runde Scheibe, welche ſich ganz frey in <lb/>zwoen Spitzen drehen kan; </s>
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1035 <s xml:id="echoid-s556" xml:space="preserve">aus dieſer Scheibe geht der <lb/>hölzerne Arm d hervor, und liegt auf dem elfenbeinernen <lb/>Kegel c auf. </s>
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1036 <s xml:id="echoid-s557" xml:space="preserve">Man läßt den entladenden Schlag unter <lb/>@em Kegel durchgehen, ſo daß er den Arm d in die Höhe
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1037 <pb o="29" file="0049" n="49" rhead="Von den Elektriſirmaſchinen."/>
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1038 wirft; </s>
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1039 <s xml:id="echoid-s558" xml:space="preserve">der Zeiger h bemerkt die Höhe dieſes Wurfs. </s>
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1040 <s xml:id="echoid-s559" xml:space="preserve">An <lb/>dem einen Ende des Fußbrets i iſt eine ſeidne Schnur be-<lb/>feſtiget, welche über die Scheibe e f g geleitet, und am <lb/>andern Ende mit einem Gegengewichte k beſchweret iſt, <lb/>um die Friktion der Scheibe zu reguliren.</s>
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1041 <s xml:id="echoid-s560" xml:space="preserve"/>
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1042 </p>
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1043 <p>
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1044 <s xml:id="echoid-s561" xml:space="preserve">Fig. </s>
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1045 <s xml:id="echoid-s562" xml:space="preserve">8 iſt ein iſolirendes Stativ, deſſen Füſſe <lb/>von Glas ſind. </s>
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1046 <s xml:id="echoid-s563" xml:space="preserve">Beym Gebrauch wird die Iſo@irung voll-<lb/>kommener ſeyn, wenn man einen recht trocknen Bogen <lb/>Papier unter die Füſſe des Stativs leget.</s>
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1047 <s xml:id="echoid-s564" xml:space="preserve"/>
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1048 </p>
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1049 </div>
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1050 <div xml:id="echoid-div29" type="section" level="1" n="28">
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1051 <head xml:id="echoid-head30" xml:space="preserve">Drittes Capitel.</head>
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1052 <head xml:id="echoid-head31" xml:space="preserve">Eigenſchaften des elektriſchen Anziehens @nd Zu-<lb/>rückſtoßens, durch Verſuche mit leichten <lb/>Körpern erläutert.</head>
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1053 <p>
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1054 <s xml:id="echoid-s565" xml:space="preserve">Das ſtarke Anziehen und Zurückſtoſſen war das erſte, <lb/>was die Naturforſcher auf die Natur der Elektrici-<lb/>tät aufmerkſam machte. </s>
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1055 <s xml:id="echoid-s566" xml:space="preserve">Dieſe räthſelhaften Eigenſchaf-<lb/>ten veranlaſſen ſo mannigfaltige und ſo angenehme Er-<lb/>ſcheinungen, daß man ſich gleichſam durch eine Zauber-<lb/>kraft zu weitern Unterſuchungen fortgeriſſen fühlte, welche <lb/>auch durch die wichtigſten Entdeckungen hinreichend be-<lb/>lohnt wurden.</s>
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1056 <s xml:id="echoid-s567" xml:space="preserve"/>
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1057 </p>
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1058 <p>
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1059 <s xml:id="echoid-s568" xml:space="preserve">Man hat mit dem eifrigſten Beſtreben alle Kräfte <lb/>des Genies aufgeboten, um die Urſachen dieſer Eigen-<lb/>ſchaften zu entdecken; </s>
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1060 <s xml:id="echoid-s569" xml:space="preserve">allein wir müſſen leider bekennen, <lb/>daß ſie noch immer ins tieſſte Dunkel gehüllt bleiben, und <lb/>daß wir uns in Abſicht auf den Mechaniſmus, durch wel-<lb/>chen leichte Körper, wenn ſie elektriſiret werden, ſich ein-<lb/>ander nähern oder von einander entfernen, faſt gänzlich in <lb/>Unwiſſenheit befinden.</s>
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1061 <s xml:id="echoid-s570" xml:space="preserve"/>
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1062 </p>
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1063 <pb o="30" file="0050" n="50" rhead="Drittes Capitel."/>
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1064 <p>
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1065 <s xml:id="echoid-s571" xml:space="preserve">Eine Unterſuchung der Schwierigkeiten, in welche <lb/>dieſe Materie verwickelt iſt, würde mich zu weit von der <lb/>Abſicht des gegenwärtigen Werks entfernen; </s>
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1066 <s xml:id="echoid-s572" xml:space="preserve">ich gehe da-<lb/>her ſogleich zur Erzählung der allgemeinen Eigenſchaften <lb/>oder Wirkungsarten fort, welche man bey dem elektriſchen <lb/>Anziehen und Zurückſtoßen bemerkt, und werde hernach <lb/>die Verſuche beſchreiben, aus welchen man dieſe Eigen-<lb/>ſchaften hergeleitet hat, oder durch welche man ſie erläu-<lb/>tern kan.</s>
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1067 <s xml:id="echoid-s573" xml:space="preserve"/>
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1068 </p>
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1069 </div>
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1070 <div xml:id="echoid-div30" type="section" level="1" n="29">
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1071 <head xml:id="echoid-head32" xml:space="preserve">Allgemeine Eigenſchaften des elektriſchen Anziehens <lb/>und Zurückſtoßens.</head>
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1072 <p>
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1073 <s xml:id="echoid-s574" xml:space="preserve">1) Wenn die elektriſche Materie in Bewegung iſt, <lb/>ſo ſetzt ſie leichte Körper in diejenige Stellung, in welcher <lb/>ſie dieſelben am leichteſten und geſchwindeſten durchdringen <lb/>kann; </s>
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1074 <s xml:id="echoid-s575" xml:space="preserve">und dieß im Verhältniß des Gewichts der Körper, <lb/>ihrer leitenden Kraft und des Zuſtands der Luft.</s>
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1075 <s xml:id="echoid-s576" xml:space="preserve"/>
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1076 </p>
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1077 <p>
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1078 <s xml:id="echoid-s577" xml:space="preserve">2) Poſitiv elektriſirte Körper ſtoßen einander zurück.</s>
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1079 <s xml:id="echoid-s578" xml:space="preserve"/>
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1080 </p>
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1081 <p>
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1082 <s xml:id="echoid-s579" xml:space="preserve">3) Negativ elektriſirte Körper ſtoßen einander eben-<lb/>falls zurück.</s>
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1083 <s xml:id="echoid-s580" xml:space="preserve"/>
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1084 </p>
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1085 <p>
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1086 <s xml:id="echoid-s581" xml:space="preserve">4) Körper, welche auf entgegengeſetzte Art elektriſi-<lb/>ret ſind, ziehen einander ſtark an.</s>
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1087 <s xml:id="echoid-s582" xml:space="preserve"/>
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1088 </p>
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1089 <p>
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1090 <s xml:id="echoid-s583" xml:space="preserve">5) Elektriſirte Körper ziehen nichtelektriſirte Sub-<lb/>ſtanzen an.</s>
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1091 <s xml:id="echoid-s584" xml:space="preserve"/>
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1092 </p>
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1093 <p>
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1094 <s xml:id="echoid-s585" xml:space="preserve">6) Subſtanzen, welche in den Wirkungskreis elek-<lb/>triſirter Körper gebracht werden, erhalten die entgegenge-<lb/>ſetzte Elektricität. </s>
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1095 <s xml:id="echoid-s586" xml:space="preserve">Oder: </s>
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1096 <s xml:id="echoid-s587" xml:space="preserve">Elektriſirte Subſtanzen wirken <lb/>auf andere in ihrer Nachbarſchaft befindliche Körper und <lb/>bringen in ihnen diejenige Elektricität hervor, welche ihrer <lb/>eignen entgegengeſetzt iſt, ohne jedoch dadurch etwas von <lb/>ihrer eignen Elektricität zu verlieren. </s>
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1097 <s xml:id="echoid-s588" xml:space="preserve">Oder auch: </s>
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1098 <s xml:id="echoid-s589" xml:space="preserve">Kör-<lb/>per, welche in eine elektriſche Atmoſphäre kommen, erhal-<lb/>ten allezeit diejenige Elektricität, welche der Elektricität <lb/>des Körpers, in deſſen Atmoſphäre ſie ſich beſinden, ent-<lb/>gegengeſetzt iſt.</s>
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1099 <s xml:id="echoid-s590" xml:space="preserve"/>
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1100 </p>
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1101 <pb o="31" file="0051" n="51" rhead="Elektriſches Anziehen und Zurückſtoßen."/>
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1102 </div>
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1103 <div xml:id="echoid-div31" type="section" level="1" n="30">
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1104 <head xml:id="echoid-head33" xml:space="preserve">13. Verſuch.</head>
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1105 <p>
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1106 <s xml:id="echoid-s591" xml:space="preserve">Man ſtecke das Ende A des Draths A B, Fig. </s>
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1107 <s xml:id="echoid-s592" xml:space="preserve">10, <lb/>in die kleine Oeffnung, welche ſich am Ende des erſten <lb/>Conductors befindet, und drehe den Cylinder, ſo werden <lb/>ſich die Federn, welche durch leinene Fäden mit dem Dra-<lb/>the verbunden ſind, von einander trennen; </s>
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1108 <s xml:id="echoid-s593" xml:space="preserve">die ſaſerigten <lb/>Theile derſelben werden auffchwellen, und ſich auf eine an-<lb/>genehme Art nach allen Richtungen ausbreiten.</s>
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1109 <s xml:id="echoid-s594" xml:space="preserve"/>
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1110 </p>
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1111 <p>
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1112 <s xml:id="echoid-s595" xml:space="preserve">Man bringe nunmehr eine metalliſche Spitze, den <lb/>Finger, oder einen andern leitenden Körper gegen die Fe-<lb/>dern, ſo werden die faſerigten Theile derſelben ſogleich zu-<lb/>ſammenfallen, die Federn werden nicht mehr auseinander <lb/>gehen, ſondern zuſammenkommen und ſich an den leiten-<lb/>den Körper hängen.</s>
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1113 <s xml:id="echoid-s596" xml:space="preserve"/>
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1114 </p>
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1115 <p>
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1116 <s xml:id="echoid-s597" xml:space="preserve">Die Urſache dieſer Entfernung der Federn von ein-<lb/>ander und ihres Strebens gegen leitende Körper iſt das <lb/>Beſtreben der ihnen mitgetheilten Elektricität, ſich aus-<lb/>zubreiten, und der Widerſtand, den daſſelbe in der Luft <lb/>antrift.</s>
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1117 <s xml:id="echoid-s598" xml:space="preserve"/>
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1118 </p>
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1119 </div>
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1120 <div xml:id="echoid-div32" type="section" level="1" n="31">
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1121 <head xml:id="echoid-head34" xml:space="preserve">14. Verſuch.</head>
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1122 <p>
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1123 <s xml:id="echoid-s599" xml:space="preserve">Man ſtecke das Ende C des Draths C D, Fig. </s>
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1124 <s xml:id="echoid-s600" xml:space="preserve">11, <lb/>in die Oefnung am Ende des Conductors, und drehe die <lb/>Maſchine, ſo werden die beyden Kügelchen c d aus einan-<lb/>der gehen. </s>
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1125 <s xml:id="echoid-s601" xml:space="preserve">Man bringe einen leitenden Körper in ihren <lb/>Wirkungskreis, ſo werden ſie gegen denſelben fliegen. <lb/></s>
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1126 <s xml:id="echoid-s602" xml:space="preserve">Man berühre den Conductor mit einem leitenden Körper, <lb/>ſo werden ſie ſogleich zuſammen kommen.</s>
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1127 <s xml:id="echoid-s603" xml:space="preserve"/>
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1128 </p>
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1129 <p>
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1130 <s xml:id="echoid-s604" xml:space="preserve">Die Kugeln gehen nicht allezeit ſo weit aus einan-<lb/>der, als man von der Wirkung ihrer Atmoſphären erwar-<lb/>ten ſollte, weil die Atmoſphäre des Conductors Einfluß <lb/>auf ſie hat.</s>
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1131 <s xml:id="echoid-s605" xml:space="preserve"/>
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1132 </p>
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1133 <p>
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1134 <s xml:id="echoid-s606" xml:space="preserve">Die Kugeln und Federn werden die nämlichen Er-<lb/>ſcheinungen zeigen, wenn ſie mit einem negativ elektriſir-<lb/>ten Conductor verbunden werden.</s>
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1135 <s xml:id="echoid-s607" xml:space="preserve"/>
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1136 </p>
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1137 <pb o="32" file="0052" n="52" rhead="Drittes Capitel."/>
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1138 </div>
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1139 <div xml:id="echoid-div33" type="section" level="1" n="32">
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1140 <head xml:id="echoid-head35" xml:space="preserve">15. Verſuch.</head>
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1141 <p>
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1142 <s xml:id="echoid-s608" xml:space="preserve">Man halte einen feinen Faden gegen einen elek@ri-<lb/>ſirten Conductor; </s>
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1143 <s xml:id="echoid-s609" xml:space="preserve">wenn man in die gehörige Entfernung <lb/>kömmt, ſo wird der Faden gegen den Conductor fliegen, <lb/>an demſelben hängen bleiben und die elektriſche Materie <lb/>daraus in die Hand führen. </s>
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1144 <s xml:id="echoid-s610" xml:space="preserve">Man ziehe den Faden ein <lb/>wenig vom Conductor ab, ſo wird er ſehr ſchnell und auf <lb/>eine ſehr angenehme Art rückwärts und vorwärts fliegen. <lb/></s>
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1145 <s xml:id="echoid-s611" xml:space="preserve">Man halte eben dieſen Faden gegen einen andern, der <lb/>vom Conductor herabhängt, ſo werden beyde einander an-<lb/>ziehen und an einander hängen bleiben. </s>
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1146 <s xml:id="echoid-s612" xml:space="preserve">Man bringe <lb/>einen leitenden Körper, z. </s>
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1147 <s xml:id="echoid-s613" xml:space="preserve">B. </s>
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1148 <s xml:id="echoid-s614" xml:space="preserve">eine meſſingene Kugel, ge-<lb/>gen dieſe Fäden, ſo wird dieſe Kugel den mit der Hand <lb/>gehaltenen Faden zurückſtoßen, den am Conductor befe-<lb/>ſtigten aber anziehen. </s>
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1149 <s xml:id="echoid-s615" xml:space="preserve">Der obere Faden nämlich macht <lb/>die meſſingene Kugel negativ, und geht alſo auf ſie zu; </s>
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1150 <s xml:id="echoid-s616" xml:space="preserve"><lb/>der untere hingegen, der ebenfalls negativ iſt, wird von <lb/>ihr zurückgeſtoßen. </s>
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1151 <s xml:id="echoid-s617" xml:space="preserve">Bringt man die Kugel an den un-<lb/>tern Theil des untern Fadens, ſo wird dieſer von ihr an-<lb/>gezogen. </s>
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1152 <s xml:id="echoid-s618" xml:space="preserve">Das Anhängen beyder Fäden an einander <lb/>kömmt von dem Beſtreben der elektriſchen Materie, ſich <lb/>durch beyde zu verbreiten.</s>
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1153 <s xml:id="echoid-s619" xml:space="preserve"/>
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1154 </p>
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1155 </div>
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1156 <div xml:id="echoid-div34" type="section" level="1" n="33">
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1157 <head xml:id="echoid-head36" xml:space="preserve">16. Verſuch.</head>
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1158 <p>
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1159 <s xml:id="echoid-s620" xml:space="preserve">An dem innern Rande des meſſingenen Ringes b c d <lb/>Fig. </s>
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1160 <s xml:id="echoid-s621" xml:space="preserve">12.</s>
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1161 <s xml:id="echoid-s622" xml:space="preserve">, ſind in gleichen Entfernungen von einander, <lb/>ſechs bis ſieben Fäden, etwa vier Zoll lang befeſtiget; <lb/></s>
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1162 <s xml:id="echoid-s623" xml:space="preserve">unten an dem Ringe iſt ein Drath, der in die Höhlung <lb/>des Stativs D paſſet; </s>
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1163 <s xml:id="echoid-s624" xml:space="preserve">z e iſt ein meſſingener Stab, an <lb/>deſſen Ende einige kleine Fäden befeſtiget ſind. </s>
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1164 <s xml:id="echoid-s625" xml:space="preserve">Man ſte-<lb/>cke das andere Ende des Stabs in die am Ende des Con-<lb/>ductors befindliche Oefnung, ſtelle den Ring b c d recht-<lb/>winklicht gegen den Stab z e, und gerade über die Fä-<lb/>den am Ende z, und drehe die Maſchine, ſo werden die <lb/>am Ringe befindlichen Fäden von denen am Stabe z e
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1165 <pb o="33" file="0053" n="53" rhead="Elektriſches Anziehen und Zurückſtoßen."/>
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1166 befeſtigten angezogen werden, und beyde werden gegen <lb/>einander ſ@reben, und eben ſo viele Halbmeſſer des Cir-<lb/>kels, als Fäden ſind, vorſtellen. </s>
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1167 <s xml:id="echoid-s626" xml:space="preserve">Die elektriſche Materie <lb/>geht aus den Fäden des Stabs in die Fäden des Ringes <lb/>über, und veranlaßt auf dieſe Art das Phänomen der An-<lb/>ziehung zwiſchen beyden.</s>
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1168 <s xml:id="echoid-s627" xml:space="preserve"/>
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1169 </p>
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1170 </div>
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1171 <div xml:id="echoid-div35" type="section" level="1" n="34">
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1172 <head xml:id="echoid-head37" xml:space="preserve">17. Verſuch.</head>
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1173 <p>
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1174 <s xml:id="echoid-s628" xml:space="preserve">Man hänge die kleine Metallplatte F, Fig. </s>
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1175 <s xml:id="echoid-s629" xml:space="preserve">13, <lb/>mit dem Hacken H an den Conductor, ſetze das Stativ <lb/>I gerade darunter, und auf daſſelbe die größere Platte G; <lb/></s>
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1176 <s xml:id="echoid-s630" xml:space="preserve">der obere Theil des Stativs muß beweglich ſeyn, damit <lb/>man die Entfernung beyder Platten von einander nach <lb/>Befinden der Umſtände verändern könne. </s>
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1177 <s xml:id="echoid-s631" xml:space="preserve">Man lege klei-<lb/>ne Papierfiguren, oder andere leichte Körper auf die un-<lb/>tere Platte, und drehe die Maſchine, ſo werden dieſe Kör-<lb/>per wechſelsweiſe von beyden Platten angezogen und zu-<lb/>rückgeſtoßen, und bewegen ſich mit großer Geſchwindigkeit <lb/>von einer zur andern.</s>
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1178 <s xml:id="echoid-s632" xml:space="preserve"/>
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1179 </p>
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1180 <p>
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1181 <s xml:id="echoid-s633" xml:space="preserve">Die auf der untern Platte liegenden Körper erhal-<lb/>ten eine Elektricität, welche der Elektricität der obern <lb/>Platte entgegengeſetzt iſt; </s>
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1182 <s xml:id="echoid-s634" xml:space="preserve">ſie werden daher von der letz-<lb/>tern angezogen, und erhalten nun einerley Elektricität mit <lb/>ihr; </s>
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1183 <s xml:id="echoid-s635" xml:space="preserve">daher werden ſie wieder zurückgeſtoßen, geben dieſe <lb/>Elektricität an das Stativ ab, und werden alſo wiederum <lb/>in Stand geſetzt, von der obern Platte angezogen zu wer-<lb/>den. </s>
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1184 <s xml:id="echoid-s636" xml:space="preserve">Daß aber dieſe Körper nicht eher von der obern <lb/>Platte angezogen werden, als bis ſie die der ihrigen ent-<lb/>gegengeſetzte Elektricität erhalten haben, oder bis das <lb/>Gleichgewicht der elektriſchen Materie in ihnen geſtört iſt, <lb/>das wird aus folgendem Verſuche erhellen.</s>
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1185 <s xml:id="echoid-s637" xml:space="preserve"/>
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1186 </p>
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1187 </div>
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1188 <div xml:id="echoid-div36" type="section" level="1" n="35">
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1189 <head xml:id="echoid-head38" xml:space="preserve">18. Verſuch.</head>
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1190 <p>
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1191 <s xml:id="echoid-s638" xml:space="preserve">Man nehme die untere Platte und das Stativ hin-<lb/>weg, und halte ſtatt deſſelben eine Glastaſel, die man an
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1192 <pb o="34" file="0054" n="54" rhead="Drittes Capitel."/>
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1193 einer Ecke anfaſſen muß, unter, nachdem man ſie vorher <lb/>recht rein und trocken gemacht hat. </s>
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1194 <s xml:id="echoid-s639" xml:space="preserve">Da nun das Glas <lb/>keine Elektricität durchläßt, ſo können keine entgegenge-<lb/>ſetzten Elektricitäten im Conductor und den leichten Kör-<lb/>pergen entſtehen, daher zeigt ſich auch in dieſem Falle kein <lb/>Anziehen oder Zurückſtoßen.</s>
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1195 <s xml:id="echoid-s640" xml:space="preserve"/>
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1196 </p>
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1197 <p>
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1198 <s xml:id="echoid-s641" xml:space="preserve">Hält man einen Finger an die untere Seite der <lb/>Glastafel, ſo werden die leichten Körper angezogen und <lb/>zurückgeſtoßen; </s>
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1199 <s xml:id="echoid-s642" xml:space="preserve">die Urſache hievon wird ſich zeigen, wenn <lb/>wir die Natur der leidner Flaſche erklären werden.</s>
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1200 <s xml:id="echoid-s643" xml:space="preserve"/>
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1201 </p>
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1202 <p>
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1203 <s xml:id="echoid-s644" xml:space="preserve">Herr Eeles, der in ſeinen Philoſophical Eſſays <lb/>(S. </s>
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1204 <s xml:id="echoid-s645" xml:space="preserve">25@ der Vorrede) von dieſem abwechſelnden Anziehen <lb/>und Zurückſtoßen redet, führt an, daß man daſſe@be nach <lb/>Gefallen verändern könne, wenn man zu@rſt die Köpfe <lb/>der Papierfiguren, und wenn dieſe getrocknet, hernach <lb/>die Füße befeuchte.</s>
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1205 <s xml:id="echoid-s646" xml:space="preserve"/>
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1206 </p>
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1207 <p>
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1208 <s xml:id="echoid-s647" xml:space="preserve">“Wenn man den Kopf einer ſolchen Figur trocknet, <lb/>ſagt er, ſo kann die aus dem Conductor gehende Mate-<lb/>rie nicht mit eben der Leichtigkeit in die Figur eindrin-<lb/>gen, mit welcher die entgegengeſetzte Elektricität aus <lb/>der Platte in den Fuß eindringt, welcher nicht ſo trocken <lb/>iſt; </s>
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1209 <s xml:id="echoid-s648" xml:space="preserve">daher fährt die Figur an die obere Platte, und bleibt <lb/>an derſelben. </s>
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1210 <s xml:id="echoid-s649" xml:space="preserve">Man kehre den Verſuch um, @rockne den <lb/>Fuß und befeuchte den Kopf, ſo werden ſich die Figuren <lb/>an die untere Platte hängen. </s>
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1211 <s xml:id="echoid-s650" xml:space="preserve">Behält die Figur ſo viel <lb/>Ueberſchuß der anziehenden Kraft über ihr eignes Ge-<lb/>wicht, als der entgegengeſetzten von dem Conductor ab-<lb/>ſtoßenden Kraft gerade das Gleichgewicht halten kann, <lb/>ſo bleibt ſie zwiſchen beyden Platten in der Luft ſchweben.</s>
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1212 <s xml:id="echoid-s651" xml:space="preserve"/>
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1213 </p>
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1214 <p>
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1215 <s xml:id="echoid-s652" xml:space="preserve">“Dies kann man bewerkſtelligen, wenn man den <lb/>Kopf der Figur breit und rund macht, ſo daß er die <lb/>Elektricität nicht ſo leicht abgiebt, als der ſcharfe und <lb/>ſpitzige Fuß ſie annimmt; </s>
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1216 <s xml:id="echoid-s653" xml:space="preserve">die geringſte Veränderung <lb/>dieſes Umſtands macht, daß die Figuren entweder tan-<lb/>zen oder feſt an einer von beyden Platten hängen bleiben.</s>
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1217 <s xml:id="echoid-s654" xml:space="preserve"/>
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1218 </p>
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1219 <pb o="35" file="0055" n="55" rhead="Elektriſches Anziehen und Zurückſtoßen."/>
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1220 </div>
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1221 <div xml:id="echoid-div37" type="section" level="1" n="36">
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1222 <head xml:id="echoid-head39" xml:space="preserve">19. Verſuch.</head>
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1223 <p>
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1224 <s xml:id="echoid-s655" xml:space="preserve">Man lege ein viereckigtes Gold- oder Silberblätt-<lb/>chen auf die untere Platte, halte ſie parallel mit der obern <lb/>etwa fünf bis ſechs Zoll von derſelben entfernt, und drehe <lb/>die Maſchine, ſo wird ſich das Blättgen vertikal aufrich-<lb/>ten, und zwiſchen beyden Platten ſchwebend bleiben, ohne <lb/>eine von beyden zu berühren. </s>
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1225 <s xml:id="echoid-s656" xml:space="preserve">Man halte eine metallene <lb/>S@itze gegen das Blättgen, ſo wird es ſogleich herab-<lb/>fallen.</s>
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1226 <s xml:id="echoid-s657" xml:space="preserve"/>
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1227 </p>
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1228 </div>
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1229 <div xml:id="echoid-div38" type="section" level="1" n="37">
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1230 <head xml:id="echoid-head40" xml:space="preserve">20. Verſuch.</head>
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1231 <p>
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1232 <s xml:id="echoid-s658" xml:space="preserve">Man befeſtige bey K, Fig. </s>
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1233 <s xml:id="echoid-s659" xml:space="preserve">14, eine meſſingene <lb/>Kugel an das Ende des Conductors. </s>
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1234 <s xml:id="echoid-s660" xml:space="preserve">Wenn die Gold-<lb/>blättchen zwiſchen der Platte und der Kugel ſchweben, ſo <lb/>führe man die Platte rund um die Kugel herum, und das <lb/>Blättchen wird mit ihr zugleich rund herumgehen, ohne <lb/>die Kugel oder die Platte zu berühren.</s>
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1235 <s xml:id="echoid-s661" xml:space="preserve"/>
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1236 </p>
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1237 <p>
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1238 <s xml:id="echoid-s662" xml:space="preserve">Gelegentlich kann man einen Glascylinder zwiſchen <lb/>die beyden Metallplatten Fig. </s>
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1239 <s xml:id="echoid-s663" xml:space="preserve">13. </s>
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1240 <s xml:id="echoid-s664" xml:space="preserve">ſetzen, um zu verhü-<lb/>ten, daß die Kleyen, der Sand und andere leichte Sub-<lb/>ſtanzen nicht herausfliegen und verſtreut werden.</s>
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1241 <s xml:id="echoid-s665" xml:space="preserve"/>
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1242 </p>
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1243 </div>
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1244 <div xml:id="echoid-div39" type="section" level="1" n="38">
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1245 <head xml:id="echoid-head41" xml:space="preserve">21. Verſuch.</head>
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1246 <p>
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1247 <s xml:id="echoid-s666" xml:space="preserve">Man ſtelle zween Dräthe gerade unter einander und <lb/>parallel mit einander, hänge den einen an den Conductor <lb/>an, und verbinde den andern mit dem Tiſche, ſo wird eine <lb/>dazwiſchen geſtellte leichte Figur, wenn man den Conduc-<lb/>tor elektriſiret, eine Art von elektriſchem Seiltänzer vor-<lb/>ſtellen. </s>
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1248 <s xml:id="echoid-s667" xml:space="preserve">Man ſ. </s>
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1249 <s xml:id="echoid-s668" xml:space="preserve">Fig. </s>
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1250 <s xml:id="echoid-s669" xml:space="preserve">15.</s>
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1251 <s xml:id="echoid-s670" xml:space="preserve"/>
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1252 </p>
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1253 </div>
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1254 <div xml:id="echoid-div40" type="section" level="1" n="39">
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1255 <head xml:id="echoid-head42" xml:space="preserve">22. Verſuch.</head>
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1256 <p>
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1257 <s xml:id="echoid-s671" xml:space="preserve">Man ſchneide ein Goldblättchen ſo aus, daß das <lb/>eine Ende einen ſtumpfen, das andere einen ſehr ſpitzigen <lb/>Winkel bildet, halte das breite Ende gegen einen elektri-<lb/>ſitten Conductor, und laſſe das Blättchen loß, ſobald es
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1258 <pb o="36" file="0056" n="56" rhead="Drittes Capitel."/>
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1259 in die Atmoſphäre deſſelben kömmt, ſo wird es ſich mit <lb/>der Spitze ſeines ſtumpfen Winkels an den Conductor <lb/>hängen, und wegen ſeiner wellenförmigen Bewegung <lb/>gleichſam belebt ſcheinen.</s>
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1260 <s xml:id="echoid-s672" xml:space="preserve"/>
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1261 </p>
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1262 <p>
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1263 <s xml:id="echoid-s673" xml:space="preserve">Der nächſtfolgende Verſuch erſordert, wenn er ge-<lb/>lingen ſoll, ſehr viel Aufmerkſamkeit; </s>
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1264 <s xml:id="echoid-s674" xml:space="preserve">der geringſte Unter-<lb/>ſch@ed im Apparatus, oder in der Stärke der Maſchine <lb/>kann ihn mißlingen machen Gelingt er aber, ſo macht <lb/>er gemeiniglich den Zuſchauern viel Vergnügen und erregt <lb/>Bewunderung.</s>
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1265 <s xml:id="echoid-s675" xml:space="preserve"/>
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1266 </p>
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1267 </div>
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1268 <div xml:id="echoid-div41" type="section" level="1" n="40">
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1269 <head xml:id="echoid-head43" xml:space="preserve">23. Verſuch.</head>
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1270 <p>
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1271 <s xml:id="echoid-s676" xml:space="preserve">Man befeſtige den Ring, Fig. </s>
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1272 <s xml:id="echoid-s677" xml:space="preserve">16, an das Ende <lb/>des Conductors, ſtelle die Platte G, Fig. </s>
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1273 <s xml:id="echoid-s678" xml:space="preserve">13, mit ih-<lb/>rem Geſtell I darunter, und ſetze in geringer Entfernung <lb/>davon eine ſehr leichte hohle Glaskugel auf die Platte, <lb/>doch ſo, daß ſie innerhalb des Ringes ſteht. </s>
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1274 <s xml:id="echoid-s679" xml:space="preserve">Dreht man <lb/>nun die Maſchine, ſo wird die kleine Kugel im Kreiſe <lb/>um den Ring laufen, und ſich zugleich um ihre Are dre-<lb/>hen, ſo, daß die Are der Umdrehung auf der Ebne ihrer <lb/>Kreisbahn faſt ſenkrecht ſtehet.</s>
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1275 <s xml:id="echoid-s680" xml:space="preserve"/>
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1276 </p>
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1277 </div>
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1278 <div xml:id="echoid-div42" type="section" level="1" n="41">
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1279 <head xml:id="echoid-head44" xml:space="preserve">24. Verſuch.</head>
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1280 <p>
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1281 <s xml:id="echoid-s681" xml:space="preserve">Fig. </s>
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1282 <s xml:id="echoid-s682" xml:space="preserve">17. </s>
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1283 <s xml:id="echoid-s683" xml:space="preserve">ſieht man eine Reihe kleiner Glöckchen; </s>
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1284 <s xml:id="echoid-s684" xml:space="preserve">die <lb/>beyden äußerſten ſind durch eine meſſingene Kette mit <lb/>dem Drathe V Y verbunden, die mittelſte Glocke und die <lb/>Klöppel hängen an ſeidnen Fäden.</s>
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1285 <s xml:id="echoid-s685" xml:space="preserve"/>
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1286 </p>
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1287 <p>
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1288 <s xml:id="echoid-s686" xml:space="preserve">Man hänge alle dieſe Glocken mit dem Hacken R S <lb/>an den Conductor, laſſe die Kette aus der mittelſten Glo-<lb/>cke auf den Tiſch fallen und drehe den Cylinder, ſo wer-<lb/>den die Klöppel unaufhörlich von einer Glocke zur andern <lb/>fliegen, ſo lang die Elektricität dauret.</s>
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1289 <s xml:id="echoid-s687" xml:space="preserve"/>
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1290 </p>
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1291 <p>
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1292 <s xml:id="echoid-s688" xml:space="preserve">Die meſſingene Kette, welche die zwo äußerſten <lb/>Glocken mit dem Conductor verbindet, führt die elektri-<lb/>ſche Materie denſelben zu, daher ziehen ſie die Klöppel
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1293 <pb o="37" file="0057" n="57" rhead="Elektriſches Anziehen und Zurückſtoßen."/>
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1294 an; </s>
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1295 <s xml:id="echoid-s689" xml:space="preserve">wenn dieſe die elektriſche Materie ebenfalls angenom-<lb/>men haben, ſo werden ſie von den äußerſten Glocken zu-<lb/>rückgeſ@oſſen und von der mittelſten angezogen, an welche <lb/>ſie ihre Elektricität abgeben; </s>
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1296 <s xml:id="echoid-s690" xml:space="preserve">hierauf werden ſie wieder <lb/>von den äuſſerſten Glocken angezogen und zurückgeſtoſſen. <lb/></s>
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1297 <s xml:id="echoid-s691" xml:space="preserve">Hält man die Kette X, welche aus der mittelſten Glocke <lb/>hervorgehet, mit einem ſeidnen Faden in die Höhe, ſo <lb/>hört das Läuten auf, weil die mittelſte Glocke die von den <lb/>K@öppeln ihr mitgetheilte elektriſche Materie nicht in die <lb/>Erde abführen kan.</s>
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1298 <s xml:id="echoid-s692" xml:space="preserve"/>
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1299 </p>
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1300 <p>
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1301 <s xml:id="echoid-s693" xml:space="preserve">Fig. </s>
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1302 <s xml:id="echoid-s694" xml:space="preserve">18 ſtellt eine ſchönere Einrichtung dieſes Glo-<lb/>ckenſpiels vor. </s>
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1303 <s xml:id="echoid-s695" xml:space="preserve">Hiebey muß die Kugel a mit dem Con-<lb/>ductor verbunden werden.</s>
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1304 <s xml:id="echoid-s696" xml:space="preserve"/>
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1305 </p>
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1306 <p>
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1307 <s xml:id="echoid-s697" xml:space="preserve">Fig. </s>
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1308 <s xml:id="echoid-s698" xml:space="preserve">19 zeigt noch eine andere Art. </s>
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1309 <s xml:id="echoid-s699" xml:space="preserve">Hiebey hängt <lb/>der Klöppel an dem Flugrade b c d deſſen Are in einem <lb/>kleinen Zapfenloche der gläſernen Säule e f ruht; </s>
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1310 <s xml:id="echoid-s700" xml:space="preserve">der obere <lb/>Theil der Are geht durch ein Loch in dem meſſingenen <lb/>Stück g, worinn er ſich frey bewegen kan. </s>
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1311 <s xml:id="echoid-s701" xml:space="preserve">Das Fußbret <lb/>h i k wird ringsherum mit Glocken von verſchiedenen Tö-<lb/>nen beſetzt. </s>
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1312 <s xml:id="echoid-s702" xml:space="preserve">Man nehme den erſten Leiter von der Ma-<lb/>ſchine hinweg, und ſetze dieſen Apparatus an den Cylinder. <lb/></s>
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1313 <s xml:id="echoid-s703" xml:space="preserve">Wenn dieſer nun gedreht wird, ſo ſetzt er das Flugrad in <lb/>Bewegung, der Klöppel ſtreift bey ſeiner Umſchwingung <lb/>an alle Glocken, und bringt dadurch einen ſehr angeneh-<lb/>men und harmoniſchen Klang hervor.</s>
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1314 <s xml:id="echoid-s704" xml:space="preserve"/>
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1315 </p>
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1316 </div>
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1317 <div xml:id="echoid-div43" type="section" level="1" n="42">
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1318 <head xml:id="echoid-head45" xml:space="preserve">25. Verſuch.</head>
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1319 <p>
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1320 <s xml:id="echoid-s705" xml:space="preserve">Man nehme 10 bis 12 Stück Fäden, jeden etwa <lb/>10 Zoll lang, binde ſie oben und unten in Knoten zuſam-<lb/>men, wie bey Fig. </s>
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1321 <s xml:id="echoid-s706" xml:space="preserve">20, und hänge ſie an den Conductor; <lb/></s>
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1322 <s xml:id="echoid-s707" xml:space="preserve">ſo werden ſich die Fäden, wenn man elektriſiret, beſtreben <lb/>auseinander zu gehen, der untere Knoten wird bey zuneh-<lb/>mender Repulſion der Fäden in die Höhe gehen, und das <lb/>Ganze wird eine ſphäroidiſche Geſtalt annehmen.</s>
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1323 <s xml:id="echoid-s708" xml:space="preserve"/>
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1324 </p>
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1325 <pb o="38" file="0058" n="58" rhead="Drittes Capitel."/>
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1326 </div>
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1327 <div xml:id="echoid-div44" type="section" level="1" n="43">
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1328 <head xml:id="echoid-head46" xml:space="preserve">26. Verſuch.</head>
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1329 <p>
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1330 <s xml:id="echoid-s709" xml:space="preserve">Man bringe eine Pflaumſeder, oder eine Flocke <lb/>Baumwolle gegen das Ende einer geriebenen Glasröhre, <lb/>oder gegen den Knopf einer geladenen Leidner Flaſche, ſo <lb/>wird die Feder zuerſt gegen die Röhre fliegen, wenn ſie <lb/>aber mit elektriſcher Materie geſättiget iſt, wieder zurück-<lb/>gehen. </s>
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1331 <s xml:id="echoid-s710" xml:space="preserve">Man wird ſie alsdann mit einer geriebenen Glas-<lb/>röhre durch das Zimmer treiben können, bis ſie einen Lei-<lb/>ter antriſt, dem ſie ihre Elektricität mittheilen kan. </s>
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1332 <s xml:id="echoid-s711" xml:space="preserve">Es <lb/>kehrt ſich dabey beſtändig einerley Seite der Feder gegen <lb/>die Röhre, weil die von der Feder angenommene elektriſche <lb/>Materie durch die Wirkung der Röhre in die von der Röh-<lb/>re abgekehrte Seite getrieben, und daher die Feder zurück-<lb/>geſtoſſen wird.</s>
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1333 <s xml:id="echoid-s712" xml:space="preserve"/>
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1334 </p>
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1335 <p>
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1336 <s xml:id="echoid-s713" xml:space="preserve">Man ſieht aus dieſem und den vorhergehenden Ver-<lb/>ſuchen leicht, daß nicht blos die Materie angezogen werde, <lb/>ſondern daß die verſchiedenen Erſcheinungen durch den Zu-<lb/>ſtand der elektriſchen Materie in den Subſtanzen, auf wel-<lb/>che die Maſchine wirkt, veranlaſſet werden.</s>
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1337 <s xml:id="echoid-s714" xml:space="preserve"/>
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1338 </p>
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1339 </div>
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1340 <div xml:id="echoid-div45" type="section" level="1" n="44">
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1341 <head xml:id="echoid-head47" xml:space="preserve">27. Verſuch.</head>
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1342 <p>
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1343 <s xml:id="echoid-s715" xml:space="preserve">Man ſtecke einen zugeſpitzten Drath in eine von de-<lb/>nen am Ende des Conductors befindlichen Deſnungen, <lb/>halte ein Trinkglas über die Spitze@ elektriſ@re den Con-<lb/>ductor, und führe das Glas ſo in die Runde herum, daß <lb/>die ganze innere Fläche deſſelben elektriſche Materie aus <lb/>der Spitze erhalte. </s>
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1344 <s xml:id="echoid-s716" xml:space="preserve">Nunmehr lege man einige kleine Kork-<lb/>oder Holundermarkkügelchen auf den Tiſch, und decke das <lb/>Trinkglas darüber, ſo werden die Kügelgen ſogleich an-<lb/>fangen auf und nieder zu hüpfen, gleichſam als ob ſie leb-<lb/>ten, und dieſe Bewegung werden ſie eine lange Zeit fort-<lb/>ſetzen. </s>
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1345 <s xml:id="echoid-s717" xml:space="preserve">S. </s>
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1346 <s xml:id="echoid-s718" xml:space="preserve">Fig. </s>
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1347 <s xml:id="echoid-s719" xml:space="preserve">21.</s>
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1348 <s xml:id="echoid-s720" xml:space="preserve"/>
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1349 </p>
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1350 <p>
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1351 <s xml:id="echoid-s721" xml:space="preserve">Mit zwenen Trinkgläſern läßt ſich dieſer Ver-<lb/>ſuch auf eine ſehr angenehme Art verändern. </s>
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1352 <s xml:id="echoid-s722" xml:space="preserve">Man elek-<lb/>@iſire die innere Seite bey dem einen poſitiv, bey dem an-
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1353 <pb o="39" file="0059" n="59" rhead="Elektriſches Anziehen und Zurückſtoßen."/>
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1354 dern negativ, werfe die Kugeln in das eine Glas, und <lb/>halte beyde Gläſer mit ihren Oefnungen aneinander, ſo <lb/>werden die Kugeln aus einem Glaſe in das andere ſo lange <lb/>übergehen, bis die entgegengeſetzten Elektricitäten beyder <lb/>Gläſer ſich unter einander aufgehoben haben.</s>
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1355 <s xml:id="echoid-s723" xml:space="preserve"/>
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1356 </p>
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1357 <p>
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1358 <s xml:id="echoid-s724" xml:space="preserve">Eine elektriſche Subſtanz mit zw@en parallelen Flä-<lb/>chen, in welcher Stellung ſie ſich auch übrigens befinden <lb/>mag, heißt eine elektriſche Platte.</s>
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1359 <s xml:id="echoid-s725" xml:space="preserve"/>
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1360 </p>
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1361 </div>
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1362 <div xml:id="echoid-div46" type="section" level="1" n="45">
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1363 <head xml:id="echoid-head48" xml:space="preserve">28. Verſuch.</head>
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1364 <p>
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1365 <s xml:id="echoid-s726" xml:space="preserve">Elektriſirte Subſtanzen ziehen die nicht-elektriſirten <lb/>an, wenn ſich auch gleich zwiſchen beyden eine elektriſche <lb/>Platte befindet.</s>
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1366 <s xml:id="echoid-s727" xml:space="preserve"/>
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1367 </p>
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1368 </div>
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1369 <div xml:id="echoid-div47" type="section" level="1" n="46">
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1370 <head xml:id="echoid-head49" xml:space="preserve">29. Verſuch.</head>
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1371 <p>
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1372 <s xml:id="echoid-s728" xml:space="preserve">Körper, welche auf entgegengeſetzte Art elektriſirt <lb/>ſind, ziehen einander ſtark an, wenn ſich gleich eine elek-<lb/>triſche Platte dazwiſchen befindet.</s>
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1373 <s xml:id="echoid-s729" xml:space="preserve"/>
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1374 </p>
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1375 </div>
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1376 <div xml:id="echoid-div48" type="section" level="1" n="47">
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1377 <head xml:id="echoid-head50" xml:space="preserve"><emph style="bf">Viertes Capitel.</emph></head>
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1378 <head xml:id="echoid-head51" xml:space="preserve">Vom Anziehen und Zurückſtoßen in Rückſicht auf <lb/>die beyden entgegengeſetzten Elektricitäten.</head>
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1379 <p>
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1380 <s xml:id="echoid-s730" xml:space="preserve">Alle in dieſem Capitel beſchriebene Verſuche ſind einfach, <lb/>leicht anzuſtellen und von ſehr ſicherem Erfolg, und <lb/>ſo geringfügig ſie vielleicht auf den erſten Blick ſcheinen, <lb/>ſo findet man ſie doch bey genauerer Unterſuchung höchſt <lb/>wichtig. </s>
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1381 <s xml:id="echoid-s731" xml:space="preserve">Sie geben uns den Leitfaden zur Prüfung und <lb/>Erklärung vieler elektriſchen Phänomene, und ſetzen einige <lb/>von den entgegengeſetzten Wirkungen der negativen und <lb/>poſitiven Elektricität in ein vorzüglich helles Licht.</s>
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1382 <s xml:id="echoid-s732" xml:space="preserve"/>
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1383 </p>
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1384 <pb o="40" file="0060" n="60" rhead="Viertes Capitel."/>
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1385 <p>
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1386 <s xml:id="echoid-s733" xml:space="preserve">Man kan alle dieſe Verſuche mit einer einzigen ſehr <lb/>kleinen und leicht tragbaren Vorrichtung anſtellen. </s>
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1387 <s xml:id="echoid-s734" xml:space="preserve">Dieſe <lb/>beſteht insgemein aus zwoen meſſingenen Röhren wie A <lb/>und B, Fig. </s>
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1388 <s xml:id="echoid-s735" xml:space="preserve">22, deren jede auf einer gläſernen Säule G <lb/>ſtehet, w@lche in den hölzernen Fuß H eingeſchraubt iſt. <lb/></s>
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1389 <s xml:id="echoid-s736" xml:space="preserve">An jede dieſer Röhren ſind mit Hülfe eines kleinen meſſin-<lb/>genen Ringes ein paar kleine Korkkugeln an leinenen Fä-<lb/>den befeſtiget, wie I, K. </s>
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1390 <s xml:id="echoid-s737" xml:space="preserve">Dieſe Röhren nebſt einer Stan-<lb/>ge Siegellack oder einer Glasröhre ſind hinreichend, den <lb/>größten Theil der Verſuche dieſes Capitels anzuſtellen, <lb/>und einige der vornehmſten elektriſchen Erſcheinungen zu <lb/>erläutern.</s>
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1391 <s xml:id="echoid-s738" xml:space="preserve"/>
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1392 </p>
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1393 <p>
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1394 <s xml:id="echoid-s739" xml:space="preserve">Vollſtändiger wird dieſe Geräthſchaft, wenn man <lb/>noch zwo meſſigene Röhren mehr, nebſt den dazu gehöri-<lb/>gen Geſtellen, eine kleine leidner Flaſche, und ein Stück <lb/>gefirnißten Seidenzeug dazu nimmt. </s>
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1395 <s xml:id="echoid-s740" xml:space="preserve">Mit einem ſolchen <lb/>Apparatus hat Herr Wilſon in ſeiner vortreflichen Schrift: <lb/></s>
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1396 <s xml:id="echoid-s741" xml:space="preserve">A ſhort View of Electricity alle allgemeine Grundſätze <lb/>der Elektricität erkläret und erläutert.</s>
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1397 <s xml:id="echoid-s742" xml:space="preserve"/>
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1398 </p>
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1399 </div>
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1400 <div xml:id="echoid-div49" type="section" level="1" n="48">
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1401 <head xml:id="echoid-head52" xml:space="preserve">30. Verſuch.</head>
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1402 <p>
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1403 <s xml:id="echoid-s743" xml:space="preserve">Man berühre ein paar iſolirte Korkkugeln mit einer <lb/>geriebenen Glasröhre, ſo werden ſie elektriſiret werden, <lb/>und auseinander gehen. </s>
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1404 <s xml:id="echoid-s744" xml:space="preserve">Sie ſind poſitiv elektriſirt, und <lb/>werden daher von geriebenem Siegellack angezogen, und <lb/>von geriebenem Glas zurückgeſtoſſen.</s>
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1405 <s xml:id="echoid-s745" xml:space="preserve"/>
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1406 </p>
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1407 </div>
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1408 <div xml:id="echoid-div50" type="section" level="1" n="49">
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1409 <head xml:id="echoid-head53" xml:space="preserve">31. Verſuch.</head>
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1410 <p>
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1411 <s xml:id="echoid-s746" xml:space="preserve">Man halte eine geriebene Glasröhre über eine von <lb/>den vorerwähnten meſſingenen Röhren, jedoch in einiger <lb/>Entfernung von derſelben, ſo wird ein Theil der natürli-<lb/>chen Menge elektriſcher Materie, welche in der meſſinge-<lb/>nen Röhre enthalten iſt, durch die Wirkung der geriebe-<lb/>nen Glasröhre in die an der meſſingenen Röhre hängenden <lb/>Korkkugeln getrieben werden, und dieſe werden mit poſi-
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1412 <pb o="41" file="0061" n="61" rhead="Entgegengeſetzte Elektricitäten."/>
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1413 tiver Elektricität auseinander gehen; </s>
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1414 <s xml:id="echoid-s747" xml:space="preserve">man nehme die ge-<lb/>riebene Glasröhre hinweg, und die Kugeln werden wieder <lb/>in ihren natürlichen Zuſtand zurückkehren und zuſammen-<lb/>fallen.</s>
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1415 <s xml:id="echoid-s748" xml:space="preserve"/>
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1416 </p>
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1417 </div>
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1418 <div xml:id="echoid-div51" type="section" level="1" n="50">
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1419 <head xml:id="echoid-head54" xml:space="preserve">32. Verſuch.</head>
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1420 <p>
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1421 <s xml:id="echoid-s749" xml:space="preserve">Man elektriſire die Korkkugeln an der meſſingenen <lb/>Röhre A, Fig. </s>
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1422 <s xml:id="echoid-s750" xml:space="preserve">27, und bringe das Ende dieſer Röhre in <lb/>Berührung mit dem Ende der Röhre B, deren Korkku-<lb/>geln nicht elektriſiret ſind; </s>
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1423 <s xml:id="echoid-s751" xml:space="preserve">ſo wird ſich die der Röhre A <lb/>mitgetheilte Elektricität gleichförmig durch beyde Paare <lb/>Kugeln vertheilen; </s>
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1424 <s xml:id="echoid-s752" xml:space="preserve">die Kugeln an B werden auseinander, <lb/>die an A wieder ein wenig zuſammengehen.</s>
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1425 <s xml:id="echoid-s753" xml:space="preserve"/>
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1426 </p>
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1427 </div>
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1428 <div xml:id="echoid-div52" type="section" level="1" n="51">
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1429 <head xml:id="echoid-head55" xml:space="preserve">33. Verſuch.</head>
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1430 <p>
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1431 <s xml:id="echoid-s754" xml:space="preserve">Man elektriſire die Röhren A und B, Fig. </s>
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1432 <s xml:id="echoid-s755" xml:space="preserve">27, beyde <lb/>gleich ſtark und auf einerley Art, und ſetze die Enden bey-<lb/>der Röhren an einander, ſo wird ſich in der Divergenz der <lb/>Bälle keine Veränderung zeigen.</s>
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1433 <s xml:id="echoid-s756" xml:space="preserve"/>
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1434 </p>
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1435 </div>
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1436 <div xml:id="echoid-div53" type="section" level="1" n="52">
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1437 <head xml:id="echoid-head56" xml:space="preserve">34. Verſuch.</head>
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1438 <p>
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1439 <s xml:id="echoid-s757" xml:space="preserve">Man elektriſire die Röhren gleich ſtark, aber auf <lb/>entgegengeſetzte Art, die eine mit Glas, die andere mit <lb/>Siegellack, und bringe ihre Enden in Berührung, ſo <lb/>werden die Kugeln zuſammenfallen.</s>
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1440 <s xml:id="echoid-s758" xml:space="preserve"/>
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1441 </p>
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1442 <p>
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1443 <s xml:id="echoid-s759" xml:space="preserve">Wir ſehen aus dieſen Verſuchen, daß poſitive und <lb/>negative Elektricität einander entgegen wirken. </s>
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1444 <s xml:id="echoid-s760" xml:space="preserve">Wenn <lb/>daher beyde zugleich auf einen Körper wirken, ſo iſt die <lb/>Elektricität, die derſelbe erhält, bloß dem Unterſchiede <lb/>beyder gleich, und von der Art der ſtärkeren.</s>
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1445 <s xml:id="echoid-s761" xml:space="preserve"/>
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1446 </p>
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1447 </div>
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1448 <div xml:id="echoid-div54" type="section" level="1" n="53">
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1449 <head xml:id="echoid-head57" xml:space="preserve">35. Verſuch.</head>
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1450 <p>
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1451 <s xml:id="echoid-s762" xml:space="preserve">Man halte eine geriebene Glasröhre an eine der meſ-<lb/>ſingenen Röhren, und berühre ſogleich dieſe Röhre mit <lb/>dem Finger, ſo wird ein Theil der in der meſſingenen
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1452 <pb o="42" file="0062" n="62" rhead="Viertes Capitel."/>
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1453 Röhre von Natur befindlichen elektriſchen Materie durch <lb/>die Wirkung der geriebenen Glasröhre in den Finger ge-<lb/>trieben. </s>
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1454 <s xml:id="echoid-s763" xml:space="preserve">Nimmt man Finger und Glasröhre in einem <lb/>und demſelben Augenblicke hinweg, ſo bleibt die Röhre <lb/>negativ elektriſirt.</s>
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1455 <s xml:id="echoid-s764" xml:space="preserve"/>
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1456 </p>
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1457 </div>
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1458 <div xml:id="echoid-div55" type="section" level="1" n="54">
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1459 <head xml:id="echoid-head58" xml:space="preserve">36. Verſuch.</head>
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1460 <p>
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1461 <s xml:id="echoid-s765" xml:space="preserve">Man ſtelle die meſſingenen Röhren A und B, Fig. <lb/></s>
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1462 <s xml:id="echoid-s766" xml:space="preserve">22, in eine gerade Linie ſo, daß ihre Enden ſich berüh-<lb/>ren, und halte die geriebene Glasröhre über A, ſo wird <lb/>ein Theil der von Natur darinn befindlichen elektriſchen <lb/>Materie in B getrieben werden. </s>
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1463 <s xml:id="echoid-s767" xml:space="preserve">Man rücke nunmehr <lb/>beyde Röhren von einander, ſo werden die Kugeln an A <lb/>negativ, und die an B poſitiv ſeyn.</s>
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1464 <s xml:id="echoid-s768" xml:space="preserve"/>
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1465 </p>
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1466 </div>
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1467 <div xml:id="echoid-div56" type="section" level="1" n="55">
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1468 <head xml:id="echoid-head59" xml:space="preserve">37. Verſuch.</head>
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1469 <p>
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1470 <s xml:id="echoid-s769" xml:space="preserve">Man iſolire einen langen metallenen Stab, hänge <lb/>a<unsure/>n jedes Ende deſſelben ein paar Korkkugeln, ſtelle das <lb/>eine Ende ohngefehr zween Zoll weit von dem erſten Con-<lb/>ductor, das andere ſo weit davon, als möglich, und elek-<lb/>triſire den Conductor, ſo wird die elektriſche Materie in <lb/>dem Stabe in das vom Conductor entfernte Ende getrie-<lb/>ben werden, ſo daß das eine Ende des Stabs, wie die <lb/>Kugeln zeigen, negativ, daß andere poſitiv elektriſiret <lb/>ſeyn wird.</s>
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1471 <s xml:id="echoid-s770" xml:space="preserve"/>
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1472 </p>
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1473 </div>
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1474 <div xml:id="echoid-div57" type="section" level="1" n="56">
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1475 <head xml:id="echoid-head60" xml:space="preserve">38. Verſuch.</head>
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1476 <p>
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1477 <s xml:id="echoid-s771" xml:space="preserve">Man halte gegen die Röhre D Fig. </s>
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1478 <s xml:id="echoid-s772" xml:space="preserve">23, eine gerie-<lb/>bene Stange Siegellack, wie bey A, ſo werden die Ku-<lb/>geln, ſo lang das Siegellack in A bleibt, mit negativer <lb/>Elektricität auseinander gehen; </s>
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1479 <s xml:id="echoid-s773" xml:space="preserve">man halte das Siegellack <lb/>etwas höher, wie bey B, ſo werden ſie zuſammengehen; <lb/></s>
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1480 <s xml:id="echoid-s774" xml:space="preserve">man erhebe es noch weiter, ſo werden ſie mit poſitiver <lb/>Elektricität auseinander gehen.</s>
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1481 <s xml:id="echoid-s775" xml:space="preserve"/>
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1482 </p>
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1483 <pb o="43" file="0063" n="63" rhead="Entgegengeſetzte Elektricitäten."/>
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1484 </div>
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1485 <div xml:id="echoid-div58" type="section" level="1" n="57">
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1486 <head xml:id="echoid-head61" xml:space="preserve">39. Verſuch.</head>
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1487 <p>
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1488 <s xml:id="echoid-s776" xml:space="preserve">Wenn geriebenes Glas mitten über die Röhre A, <lb/>Fig. </s>
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1489 <s xml:id="echoid-s777" xml:space="preserve">24, gehalten wird, ſo wird ein Theil der natürlichen <lb/>Menge von Elektricität in A in die Kugeln, ein Theil <lb/>auch aus beyden Enden heraus in die Luft getrieben. <lb/></s>
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1490 <s xml:id="echoid-s778" xml:space="preserve">Während dieſes Verſuchs werden die Kugeln an A vom <lb/>Glaſe zurückgeſtoſſen, und ſind daher poſitiv. </s>
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1491 <s xml:id="echoid-s779" xml:space="preserve">Nimmt man <lb/>aber die geriebene Glasröhre hinweg, ſo gehen ſie in ſehr <lb/>kurzer Zeit in den negativen Zuſtand über, weil ein Theil <lb/>der natürlichen Menge von Elektricität durch die zuge-<lb/>ſpitzten Enden in die Luft übergegangen iſt, indem die <lb/>Glasröhre ſich noch über der metallenen Röhre befand; </s>
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1492 <s xml:id="echoid-s780" xml:space="preserve"><lb/>wird nun die Glasröhre weggenommen, ſo tritt zwar der <lb/>in den Kugeln enthaltene Ueberfluß von ſelbſt zurück, und <lb/>verbreitet ſich gleichförmig durch die Röhre, da aber der-<lb/>ſelbe nicht hinreichend iſt, den erhaltenen Verluſt zu er-<lb/>ſetzen, ſo bleiben Röhre, Fäden und Kugeln in negativem <lb/>Zuſtande zurück. </s>
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1493 <s xml:id="echoid-s781" xml:space="preserve"><anchor type="note" xlink:href="" symbol="*)"/></s>
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1494 </p>
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1495 </div>
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1496 <div xml:id="echoid-div59" type="section" level="1" n="58">
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1497 <head xml:id="echoid-head62" xml:space="preserve">40. Verſuch.</head>
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1498 <p>
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1499 <s xml:id="echoid-s782" xml:space="preserve">Stellt man drey Röhren A, B, C, Fig. </s>
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1500 <s xml:id="echoid-s783" xml:space="preserve">25, in eine <lb/>Linie und in Berührung mit einander, ſo wird ein über A <lb/>gehaltenes geriebenes Glas, einen Theil der in A befindli-<lb/>chen natürlichen Menge elektriſcher Materie in B und C <lb/>übertreiben. </s>
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1501 <s xml:id="echoid-s784" xml:space="preserve">Man rücke nun B und C von A ab; </s>
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1502 <s xml:id="echoid-s785" xml:space="preserve">ſo wird <lb/>man A negativ, B und C poſitiv finden. </s>
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1503 <s xml:id="echoid-s786" xml:space="preserve">Rückt man die <lb/>drey Röhren wieder zuſammen, ſo ſtellt ſich das Gleich-<lb/>gewicht wieder her, und die Kugeln fallen zuſammen. </s>
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1504 <s xml:id="echoid-s787" xml:space="preserve"><anchor type="note" xlink:href="" symbol="**)"/></s>
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1505 </p>
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1506 </div>
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1507 <div xml:id="echoid-div60" type="section" level="1" n="59">
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1508 <head xml:id="echoid-head63" xml:space="preserve">41. Verſuch.</head>
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1509 <p>
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1510 <s xml:id="echoid-s788" xml:space="preserve">Stellt man vier Röhren, wie A, B, C, D, Fig. </s>
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1511 <s xml:id="echoid-s789" xml:space="preserve">26, <lb/>in Berührung mit einander, ſo wird eine geriebene Glas-<lb/>röhre über A gehalten, einen Theil der in A enthaltenen <lb/>
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1512 <anchor type="note" xlink:label="note-0063-01a" xlink:href="note-0063-01"/>
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1513 <anchor type="note" xlink:label="note-0063-02a" xlink:href="note-0063-02"/>
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1514 <pb o="44" file="0064" n="64" rhead="Viertes Capitel."/>
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1515 Materie in B übertreiben, und dieſer in B übergegangene <lb/>Theil wird einen gewiſſen Theil aus C in D treiben. </s>
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1516 <s xml:id="echoid-s790" xml:space="preserve">Den <lb/>Augenblick vorher, ehe man die geriebene Glasröhre von <lb/>A wegnimmt, rücke man B und D von A und C ab, ſo <lb/>wird man A und C negativ, B und D aber poſitiv fin-<lb/>den. </s>
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1517 <s xml:id="echoid-s791" xml:space="preserve"><anchor type="note" xlink:href="" symbol="*)"/></s>
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1518 </p>
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1519 <div xml:id="echoid-div60" type="float" level="2" n="1">
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1520 <note symbol="*)" position="foot" xlink:label="note-0063-01" xlink:href="note-0063-01a" xml:space="preserve"> Man ſ. Wilſon’s ſhort View of Electricity, p. 7.</note>
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1521 <note symbol="**)" position="foot" xlink:label="note-0063-02" xlink:href="note-0063-02a" xml:space="preserve"> Eb@nd. p. 8.</note>
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1522 </div>
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1523 </div>
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1524 <div xml:id="echoid-div62" type="section" level="1" n="60">
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1525 <head xml:id="echoid-head64" xml:space="preserve">42. Verſuch.</head>
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1526 <p>
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1527 <s xml:id="echoid-s792" xml:space="preserve">Eine geriebene Glasröhre ohngefähr einen Zoll weit <lb/>von dem Ende B eines maſſiven ſechs Schuh langen und <lb/>etwa einen halben Zoll ſtarken Glascylinders B D, Fig. </s>
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1528 <s xml:id="echoid-s793" xml:space="preserve">28 <lb/>Taf. </s>
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1529 <s xml:id="echoid-s794" xml:space="preserve">III. </s>
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1530 <s xml:id="echoid-s795" xml:space="preserve">gehalten, treibt einen Theil der elektriſchen Ma-<lb/>terie am Ende B gegen das entfernte Ende D; </s>
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1531 <s xml:id="echoid-s796" xml:space="preserve">hiebey aber <lb/>leidet die natürliche Menge elektriſcher Materie im Glaſe <lb/>mancherley Veränderungen, welche ſich zu erkennen geben, <lb/>wenn man an die Korkkugeln, die, wie die Figur zeigt, <lb/>in gleichen Entfernungen von einander zwiſchen B und D <lb/>aufgehängt ſind, eine geriebene Glasröhre bringt; </s>
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1532 <s xml:id="echoid-s797" xml:space="preserve">in kur-<lb/>zer Zeit verändert ſich die Elektricität dieſer Korkkugeln; <lb/></s>
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1533 <s xml:id="echoid-s798" xml:space="preserve">die vorher poſitiv waren, werden negativ, die vorher ne-<lb/>gativ waren, poſitiv.</s>
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1534 <s xml:id="echoid-s799" xml:space="preserve"/>
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1535 </p>
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1536 <p>
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1537 <s xml:id="echoid-s800" xml:space="preserve">Hält man die geriebene Glasröhre in Berührung <lb/>mit dem Ende B. </s>
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1538 <s xml:id="echoid-s801" xml:space="preserve">ſo verurſacht der in B übergehende Zu-<lb/>ſatz von elektriſcher Materie wiederum verſchiedene Ver-<lb/>änderungen in der Dichtigkeit der elektriſchen Materie <lb/>zwiſchen B und D; </s>
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1539 <s xml:id="echoid-s802" xml:space="preserve">dieſe Veränderungen ſind den vorigen <lb/>gerade entgegengeſetzt, und kehren ſich nach kurzer Zeit <lb/>ebenfalls um.</s>
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1540 <s xml:id="echoid-s803" xml:space="preserve"/>
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1541 </p>
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1542 <p>
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1543 <s xml:id="echoid-s804" xml:space="preserve">Aus dieſen Verſuchen läßt ſich ſchließen, daß, wenn <lb/>die elektriſche Materie in einem Theile eines Körpers plötz-<lb/>lich dichter wird, die in dem benachbarten Theile dünner <lb/>werde, und umgekehrt. </s>
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1544 <s xml:id="echoid-s805" xml:space="preserve">Dieſe Abwechſelungen dünner <lb/>und dichter Zonen müſſen der Natur elaſtiſcher f@üßiger <lb/>Materien zufolge, eine lange Zeit hindurch mancherley <lb/>vorwärts und rückwärts gehende Schwingungen veranlaſ-<lb/>
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1545 <anchor type="note" xlink:label="note-0064-01a" xlink:href="note-0064-01"/>
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1546 <pb o="45" file="0065" n="65" rhead="Entgegengeſetzte Elektricitäten."/>
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1547 ſen, ehe die flüßige Materie in Ruhe kommen kann, ob-<lb/>gleich dieſe Schwingungen, wenn ſie bis auf einen gewiſ-<lb/>ſen Grad geſchwächt worden ſind, dem Beobachter endlich <lb/>unmerklich werden. </s>
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1548 <s xml:id="echoid-s806" xml:space="preserve"><anchor type="note" xlink:href="" symbol="*)"/></s>
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1549 </p>
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1550 <div xml:id="echoid-div62" type="float" level="2" n="1">
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1551 <note symbol="*)" position="foot" xlink:label="note-0064-01" xlink:href="note-0064-01a" xml:space="preserve"> Ebendaſ. p. 8.</note>
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1552 </div>
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1553 <p>
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1554 <s xml:id="echoid-s807" xml:space="preserve">Es iſt nicht unwahrſcheinlich, daß die anziehenden <lb/>und zurückſtoßenden Bewegungen elektriſirter Körper von <lb/>der abwechſelnden Verdichtung und Verdünnung der elek-<lb/>triſchen Materie an der Oberfläche dieſer Körper <gap/>kom-<lb/>men, da ſie natürlicher Weiſe dahin getrieben wer@en, wo <lb/>ſie den wenigſten Widerſtand finden.</s>
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1555 <s xml:id="echoid-s808" xml:space="preserve"/>
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1556 </p>
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1557 <p>
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1558 <s xml:id="echoid-s809" xml:space="preserve">Daß zwiſchen der in Wirkſamkeit geſetzten elektri-<lb/>ſchen Materie und der Luft, eine ſchwingende Bewegung und <lb/>eine Art von Kampf ſtatt finde, zeigt ſich deutlich aus der <lb/>Empfindung, welche man fühlt, wenn ein ſtark geriebener <lb/>elektriſcher Körper einem Theile des menſchlichen Körpers <lb/>genähert wird; </s>
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1559 <s xml:id="echoid-s810" xml:space="preserve">dies Gefühl iſt, als ob ein Spinnenge-<lb/>webe gelind über die Haut gezogen würde. </s>
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1560 <s xml:id="echoid-s811" xml:space="preserve">Noch deut-<lb/>licher zeigt ſich dieſes aus einem Verſuche, den D. </s>
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1561 <s xml:id="echoid-s812" xml:space="preserve">Prieſt-<lb/>ley in der Abſicht anſtellte, um zu entdecken, ob die Elek-<lb/>tricität beym Gefrieren des Waſſers mitwirke.</s>
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1562 <s xml:id="echoid-s813" xml:space="preserve"/>
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1563 </p>
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1564 </div>
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1565 <div xml:id="echoid-div64" type="section" level="1" n="61">
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1566 <head xml:id="echoid-head65" xml:space="preserve">43. Verſuch.</head>
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1567 <p>
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1568 <s xml:id="echoid-s814" xml:space="preserve"><emph style="bf">D. Prieſtley</emph> ſetzte zwo Schüſſeln mit Waſſer bey <lb/>ſtrenger Kälte der freyen Luft aus, deren eine er ſtark elek-<lb/>triſirt erhielt. </s>
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1569 <s xml:id="echoid-s815" xml:space="preserve">Er konnte zwiſchen beyden Schüſſeln in <lb/>der Zeit, wenn der Froſt anfieng, und in der Dicke des <lb/>Eiſes keinen Unterſchied bemerken: </s>
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1570 <s xml:id="echoid-s816" xml:space="preserve">wohl aber ſahe er an <lb/>beyden Seiten des elektriſirten Draths eben den zitternden <lb/>Dunſt, den man an heißen Tagen an der Oberfläche der <lb/>Erde, und überhaupt allemal an ſtark erhitzten Körpern <lb/>bemerkt.</s>
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1571 <s xml:id="echoid-s817" xml:space="preserve"/>
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1572 </p>
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1573 <p>
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1574 <s xml:id="echoid-s818" xml:space="preserve">Aus verſchiedenen Verſuchen des P. </s>
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1575 <s xml:id="echoid-s819" xml:space="preserve">Beccaria er-<lb/>hellet, daß in einer luftleeren gläſernen Glocke, das An-<lb/>ziehen und Zurückſtoßen elektriſirter Körper ſchwach wird, <lb/>und bald gänzlich aufhört.</s>
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1576 <s xml:id="echoid-s820" xml:space="preserve"/>
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1577 </p>
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1578 <note symbol="*)" position="foot" xml:space="preserve"> Ebendaſ. p. 18.</note>
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1579 <pb o="46" file="0066" n="66" rhead="Viertes Capitel."/>
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1580 </div>
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1581 <div xml:id="echoid-div65" type="section" level="1" n="62">
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1582 <head xml:id="echoid-head66" xml:space="preserve">Verſuche über das Anziehen und Zurückſtoßen <lb/>geriebener ſeidner Bänder.</head>
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1583 <head xml:id="echoid-head67" xml:space="preserve">44. Verſuch.</head>
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1584 <p>
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1585 <s xml:id="echoid-s821" xml:space="preserve">Man lege ein ſchwarzes und ein weißes Band zu-<lb/>ſammen, und ziehe beyde durch die Finger; </s>
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1586 <s xml:id="echoid-s822" xml:space="preserve">ſo wird da-<lb/>durch das weiße Band poſitiv und das ſchwarze negativ <lb/>elektriſiret; </s>
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1587 <s xml:id="echoid-s823" xml:space="preserve">beyde werden alſo einander ſtark anziehen.</s>
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1588 <s xml:id="echoid-s824" xml:space="preserve"/>
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1589 </p>
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1590 </div>
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1591 <div xml:id="echoid-div66" type="section" level="1" n="63">
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1592 <head xml:id="echoid-head68" xml:space="preserve">45. Verſuch.</head>
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1593 <p>
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1594 <s xml:id="echoid-s825" xml:space="preserve">Man lege beyde Bänder auf Papier und ſtreiche ſie <lb/>mit’<unsure/> Bernſtein, Siegellak oder einem andern negativ elek-<lb/>triſchen Körper, ſo werden ſie poſitiv elektriſch.</s>
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1595 <s xml:id="echoid-s826" xml:space="preserve"/>
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1596 </p>
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1597 <p>
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1598 <s xml:id="echoid-s827" xml:space="preserve">Reibt man die Bänder mit poſitiv elektriſchen Kör-<lb/>pern, ſo werden ſie negativ elektriſch.</s>
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1599 <s xml:id="echoid-s828" xml:space="preserve"/>
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1600 </p>
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1601 </div>
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1602 <div xml:id="echoid-div67" type="section" level="1" n="64">
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1603 <head xml:id="echoid-head69" xml:space="preserve">46. Verſuch.</head>
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1604 <p>
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1605 <s xml:id="echoid-s829" xml:space="preserve">Ein Stück Flanell und ein ſchwarzes Band werden <lb/>an einander gerieben eben ſo wohl elektriſch, als ein <lb/>ſchwarzes und ein weißes Band.</s>
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1606 <s xml:id="echoid-s830" xml:space="preserve"/>
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1607 </p>
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1608 </div>
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1609 <div xml:id="echoid-div68" type="section" level="1" n="65">
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1610 <head xml:id="echoid-head70" xml:space="preserve">47. Verſuch.</head>
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1611 <p>
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1612 <s xml:id="echoid-s831" xml:space="preserve">Man trockne zwey weiße ſeidne Bänder am Feuer, <lb/>breite ſie beyde über einander auf einer glatten Fläche aus, <lb/>und fahre mit der Kante eines ſcharfen elfenbeinernen Li-<lb/>neals darüber. </s>
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1613 <s xml:id="echoid-s832" xml:space="preserve">So lang ſie ſo auf der Fläche liegen blei-<lb/>ben, geben ſie kein Zeichen der Elektricität; </s>
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1614 <s xml:id="echoid-s833" xml:space="preserve">nimmt man <lb/>ſie aber, jedes beſonders, hinweg, ſo findet man ſie beyde <lb/>negativ elektriſiret, und ſie ſtoßen einander zurück.</s>
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1615 <s xml:id="echoid-s834" xml:space="preserve"/>
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1616 </p>
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1617 <p>
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1618 <s xml:id="echoid-s835" xml:space="preserve">Indem man ſie beyde von einander zieht, ſieht man <lb/>elektriſche Funken zwiſchen ihnen; </s>
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1619 <s xml:id="echoid-s836" xml:space="preserve">legt man ſie aber wie-<lb/>der zuſammen auf die Fläche, ſo bemerkt man kein Licht, <lb/>bis man ſie wieder gerieben hat.</s>
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1620 <s xml:id="echoid-s837" xml:space="preserve"/>
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1621 </p>
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1622 <pb o="47" file="0067" n="67" rhead="Verſuche mit ſeidnen Bändern."/>
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1623 </div>
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1624 <div xml:id="echoid-div69" type="section" level="1" n="66">
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1625 <head xml:id="echoid-head71" xml:space="preserve">48. Verſuch.</head>
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1626 <p>
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1627 <s xml:id="echoid-s838" xml:space="preserve">Man lege die Bänder auf eine rauhe leitende Sub-<lb/>ſtanz, und reibe ſie, wie vorher, ſo werden ſie, von ein-<lb/>a@d<unsure/>er getrennt, entgegengeſetzte Elektricitäten zeigen, we@-<lb/>che wieder verſchwinden, wenn ſie zuſammengelegt <lb/>werden.</s>
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1628 <s xml:id="echoid-s839" xml:space="preserve"/>
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1629 </p>
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1630 <p>
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1631 <s xml:id="echoid-s840" xml:space="preserve">Macht man zuerſt, daß die Bänder einander zurück-<lb/>ſtoßen, legt ſie darauf wieder zuſammen, und bringt <lb/>ſie auf die vorerwähnte rauhe Fläche, ſo ziehen ſie nach <lb/>wenig Minuten einander an; </s>
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1632 <s xml:id="echoid-s841" xml:space="preserve">das obere iſt poſitiv, das <lb/>untere negativ elektriſirt.</s>
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1633 <s xml:id="echoid-s842" xml:space="preserve"/>
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1634 </p>
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1635 <p>
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1636 <s xml:id="echoid-s843" xml:space="preserve">Werden zwey weiße Bänder an einer rauhen Fläche <lb/>gerieben, ſo erhalten ſie allezeit entgegengeſetzte Elektrici-<lb/>täten, das obere iſt negativ, das untere poſitiv.</s>
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1637 <s xml:id="echoid-s844" xml:space="preserve"/>
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1638 </p>
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1639 </div>
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1640 <div xml:id="echoid-div70" type="section" level="1" n="67">
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1641 <head xml:id="echoid-head72" xml:space="preserve">49. Verſuch.</head>
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1642 <p>
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1643 <s xml:id="echoid-s845" xml:space="preserve">Bringt man zwey Bänder in den Zuſtand, daß ſie <lb/>einander zurückſtoßen, und führt die Spitze einer Nadel <lb/>der Länge nach über das eine Band, ſo werden ſie beyde <lb/>zuſammenfahren.</s>
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1644 <s xml:id="echoid-s846" xml:space="preserve"/>
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1645 </p>
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1646 </div>
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1647 <div xml:id="echoid-div71" type="section" level="1" n="68">
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1648 <head xml:id="echoid-head73" xml:space="preserve">50. Verſuch.</head>
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1649 <p>
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1650 <s xml:id="echoid-s847" xml:space="preserve">Man bringe ein elektriſirtes Band gegen eine kleine <lb/>i<unsure/>ſolirte Metallplatte, ſo wird es von derſelben ſchwach an-<lb/>gezogen; </s>
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1651 <s xml:id="echoid-s848" xml:space="preserve">man bringe den Finger gegen die Platte, ſo <lb/>entſteht ein Funken zwiſchen beyden, obgleich Band und <lb/>Platte zuſammen kein Zeichen einiger Elektricität von ſich <lb/>geben; </s>
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1652 <s xml:id="echoid-s849" xml:space="preserve">zieht man das Band von der Platte ab, ſo ſind <lb/>beyde wieder elektriſirt, und es entſteht ein Funken zwi-<lb/>ſchen der Platte und dem Finger.</s>
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1653 <s xml:id="echoid-s850" xml:space="preserve"/>
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1654 </p>
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1655 </div>
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1656 <div xml:id="echoid-div72" type="section" level="1" n="69">
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1657 <head xml:id="echoid-head74" xml:space="preserve">51. Verſuch.</head>
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1658 <p>
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1659 <s xml:id="echoid-s851" xml:space="preserve">Man lege mehrere Bänder von gleicher Farbe über <lb/>einander auf eine rauhe leitende Subſtanz, fahre mit dem <lb/>elfenbeinernen Lineal darüber, und hebe jedes einzeln auf,
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1660 <pb o="48" file="0068" n="68" rhead="Viertes Capitel."/>
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1661 ſo wird jedes an der Stelle, wo es ſich von dem folgen-<lb/>den trennt, einen Funken geben, und das letzte wird eben <lb/>dies gegen die leitende Subſtanz thun; </s>
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1662 <s xml:id="echoid-s852" xml:space="preserve">alle Bänder ſind <lb/>negativ elektriſirt. </s>
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1663 <s xml:id="echoid-s853" xml:space="preserve">Man nehme ſie zuſammen von der <lb/>Fläche ab, ſo hängen ſie alle an einander, und machen <lb/>eine Maſſe aus, die auf beyden Seiten negativ elektri-<lb/>ſirt iſt.</s>
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1664 <s xml:id="echoid-s854" xml:space="preserve"/>
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1665 </p>
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1666 </div>
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1667 <div xml:id="echoid-div73" type="section" level="1" n="70">
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1668 <head xml:id="echoid-head75" xml:space="preserve">52. Verſuch.</head>
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1669 <p>
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1670 <s xml:id="echoid-s855" xml:space="preserve">Man lege ſie, wie vorher, auf eine rauhe leitende <lb/>Subſtanz, und nehme ſie einzeln ab, ſo daß man mit <lb/>dem unterſten den Anſang macht, ſo erſcheinen Funken, <lb/>wie vorher, aber alle Bänder werden poſitiv, nur das <lb/>oberſte ausgenommen. </s>
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1671 <s xml:id="echoid-s856" xml:space="preserve">Werden ſie auf dem rauhen lei-<lb/>tenden Körper gerieben, und alle auf einmal weggenom-<lb/>men, ſo erhalten alle in der Mitte liegende Bänder, wenn <lb/>man ſie trennt, die Elektricität des oberſten oder des un-<lb/>terſten, je nachdem man den Anfang der Trennung bey <lb/>dem oberſten oder bey dem unterſten gemacht hat.</s>
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1672 <s xml:id="echoid-s857" xml:space="preserve"/>
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1673 </p>
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1674 <p>
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1675 <s xml:id="echoid-s858" xml:space="preserve">Folgende ungemein merkwürdige Beobachtungen <lb/>und Verſuche ſind von Herrn Symmer zuerſt angeſtellt <lb/>worden. </s>
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1676 <s xml:id="echoid-s859" xml:space="preserve">Er trug gewöhnlich zwey Paar ſeidne Strüm-<lb/>pfe, ein paar weiße und ein paar ſchwarze. </s>
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1677 <s xml:id="echoid-s860" xml:space="preserve">Wenn er <lb/>dieſe zugleich und auf einmal auszog, ſo bemerkte er kein <lb/>Zeichen der Elektricität; </s>
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1678 <s xml:id="echoid-s861" xml:space="preserve">wenn er aber den ſchwarzen <lb/>Strumpf von dem weißen abzog, ſo hörte er ein kniſtern-<lb/>des Geräuſch, und ſahe im Dunklen Funken zwi-<lb/>ſchen beyden Strümpfen. </s>
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1679 <s xml:id="echoid-s862" xml:space="preserve">Um nun dieſe und die nachfol-<lb/>genden Erſcheinungen in gehöriger Vollkommenheit her-<lb/>vor zu bringen, durfte er nur mit ſeiner Hand einigemal <lb/>über den Schenkel, an welchem er die Strümpfe trug, hin <lb/>und her fahren.</s>
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1680 <s xml:id="echoid-s863" xml:space="preserve"/>
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1681 </p>
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1682 <p>
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1683 <s xml:id="echoid-s864" xml:space="preserve">Wenn die Strümpfe getrennt, und in einiger Ent-<lb/>fernung von einander gehalten wurden, ſo zeigten ſich <lb/>beyde ſtark elektriſch; </s>
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1684 <s xml:id="echoid-s865" xml:space="preserve">der weiße poſitiv, der ſchwarze ne-<lb/>gativ. </s>
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1685 <s xml:id="echoid-s866" xml:space="preserve">Während dieſer Zeit waren beyde ſo ſtark aufge-
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1686 <pb o="49" file="0069" n="69" rhead="Verſuche mit ſeidnen Bändern."/>
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1687 blaſen, daß ſie die ganze Geſtalt des Schenkels zeigten. <lb/></s>
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1688 <s xml:id="echoid-s867" xml:space="preserve">Hält man die beyden weißen oder die beyden ſchwarzen <lb/>Strümpfe in einer Hand, ſo ſtoßen ſie einander mit be-<lb/>trächtlicher Gewalt zurück. </s>
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1689 <s xml:id="echoid-s868" xml:space="preserve">Hält man einen weißen und <lb/>einen ſchwarzen Strumpf an einander, ſo ziehen ſie ſich <lb/>an, und fahren, wenn man es zuläßt, mit großer Ge-<lb/>walt zuſammen. </s>
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1690 <s xml:id="echoid-s869" xml:space="preserve">So wie ſie einander nahe kommen, hört <lb/>auch das Aufblaſen nach und nach auf, und ſie ziehen <lb/>fremde Gegenſtände weniger, ſich ſelbſt aber deſto ſtärker <lb/>an; </s>
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1691 <s xml:id="echoid-s870" xml:space="preserve">erreichen ſie einander wirklich, ſo werden ſie ganz <lb/>platt und legen ſich dicht zuſammen; </s>
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1692 <s xml:id="echoid-s871" xml:space="preserve">trennt man ſie wie-<lb/>der, ſo ſcheint ihre elektriſche Kraft durch das Zuſammen-<lb/>legen nicht im geringſten ſchwächer geworden zu ſeyn. </s>
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1693 <s xml:id="echoid-s872" xml:space="preserve"><lb/>Dieſe Erſcheinungen zeigen ſie eine ſehr lange Zeit hin-<lb/>durch.</s>
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1694 <s xml:id="echoid-s873" xml:space="preserve"/>
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1695 </p>
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1696 <p>
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1697 <s xml:id="echoid-s874" xml:space="preserve">Läßt man die Strümpfe zuſammen, ſo fahren ſie <lb/>mit beträchtlicher Gewalt an einander; </s>
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1698 <s xml:id="echoid-s875" xml:space="preserve">Herr Symmer <lb/>fand, daß bis auf 12 Unzen Gewicht nöthig war, um ſie <lb/>aus einander zu ziehen. </s>
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1699 <s xml:id="echoid-s876" xml:space="preserve">Ein andermal hielten ſie 17 <lb/>Unzen. </s>
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1700 <s xml:id="echoid-s877" xml:space="preserve">Neugefärbte ſchwarze Strümpfe, und neuge-<lb/>waſchene und geſchwefelte weiße ſo in einander geſteckt, <lb/>daß die rauhen Seiten zuſammen kamen, hielten 3 Pfund <lb/>und 3 Unzen, ehe ſie aus einander geriſſen wurden.</s>
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1701 <s xml:id="echoid-s878" xml:space="preserve"/>
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1702 </p>
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1703 <p>
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1704 <s xml:id="echoid-s879" xml:space="preserve">Wurde der weiße Strumpf ſo in den ſchwarzen ge-<lb/>ſteckt, daß die äußere Seite des weißen und die innere des <lb/>ſchwarzen einander berührten, ſo hielten ſie 9 Pfund we-<lb/>niger etliche Unzen; </s>
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1705 <s xml:id="echoid-s880" xml:space="preserve">kamen aber beyde rauhe Seiten zu-<lb/>ſammen, ſo hielten ſie 15 Pfund 1 {1/2} Pfenniggewicht.</s>
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1706 <s xml:id="echoid-s881" xml:space="preserve"/>
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1707 </p>
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1708 <pb o="50" file="0070" n="70" rhead="Fünftes Capitel."/>
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1709 </div>
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1710 <div xml:id="echoid-div74" type="section" level="1" n="71">
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1711 <head xml:id="echoid-head76" xml:space="preserve">Fünftes Capitel. <lb/>Vom elektriſchen Funken.</head>
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1712 <head xml:id="echoid-head77" xml:space="preserve">53. Verſuch.</head>
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1713 <p>
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1714 <s xml:id="echoid-s882" xml:space="preserve">Man befeſtige den Drath mit der Kugel B an das <lb/>Ende des Conductors, wie bey A, Fig. </s>
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1715 <s xml:id="echoid-s883" xml:space="preserve">29, drehe <lb/>den Cylinder, und bringe den Knöchel des Fingers oder <lb/>eine andere metallene Kugel, wie C, gegen B; </s>
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1716 <s xml:id="echoid-s884" xml:space="preserve">wenn <lb/>nun die Maſchine ſtark iſt, ſo wird ein langer, im Zikzak <lb/>gebrochener, glänzender elektriſcher Funken, wie ein Feuer, <lb/>mit einem kniſternden Geräuſch zwiſchen beyden Kugeln, <lb/>oder zwiſchen der Kugel und dem Knöchel entſtehen.</s>
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1717 <s xml:id="echoid-s885" xml:space="preserve"/>
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1718 </p>
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1719 <p>
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1720 <s xml:id="echoid-s886" xml:space="preserve">Die Verſuche des vorigen Capitels zeigen, daß die-<lb/>jenigen Subſtanzen, welche in den Wirkungskreis elck-<lb/>triſirter Körper kommen, eine entgegengeſetzte Elektricität <lb/>erhalten, und ſich folglich im Stande befinden, von dem <lb/>mit elektriſcher Materie angefüllten Körper einen Funken <lb/>zu erhalten. </s>
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1721 <s xml:id="echoid-s887" xml:space="preserve">Wenn ſie ihm nun nahe genug kommen, ſo <lb/>erhalten ſie die elektriſche Materie wirklich in Geſtalt eines <lb/>Funkens. </s>
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1722 <s xml:id="echoid-s888" xml:space="preserve">Iſt der Conductor negativ, ſo geht die elek-<lb/>triſche Materie aus dem angenäherten Körper in ihn über. <lb/></s>
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1723 <s xml:id="echoid-s889" xml:space="preserve">Der Funken bricht nicht eher auf die größte Weite in <lb/>einen gegebenen Körper aus, bis man ihn vorher in einer <lb/>geringern Weite hat ſchlagen laſſen, wodurch der Aus-<lb/>bruch gleichſam vorwärts gelocket wird.</s>
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1724 <s xml:id="echoid-s890" xml:space="preserve"/>
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1725 </p>
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1726 <p>
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1727 <s xml:id="echoid-s891" xml:space="preserve">Die längſten und ſtärkſten Funken kommen aus dem <lb/>vom Cylinder abgekehrten Ende des Conductors, ob man <lb/>gleich auch lange und krummlinigte Funken in der Nähe <lb/>der iſolirenden Säule, auf welcher der Conductor ruht, <lb/>herausziehen kann.</s>
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1728 <s xml:id="echoid-s892" xml:space="preserve"/>
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1729 </p>
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1730 <p>
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1731 <s xml:id="echoid-s893" xml:space="preserve">Der Funken, oder die ausbrechende Menge elektri-<lb/>ſcher Materie, ſteht ziemlich nahe im Verhältniß mit der <lb/>Größe des Conductors. </s>
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1732 <s xml:id="echoid-s894" xml:space="preserve">Hat der Conductor eine große
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1733 <pb o="51" file="0071" n="71" rhead="Vom elektriſchen Funken."/>
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1734 Oberfläche, ſo erhält man aus ihm ſtärkere und längere <lb/>Funken, als aus einem kleinern. </s>
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1735 <s xml:id="echoid-s895" xml:space="preserve">Man hat dies ſo weit <lb/>getrieben, daß die aus dem Conductor erhaltenen Funken <lb/>den Schlägen aus einer ziemlich großen Flaſche gleich ge-<lb/>weſen ſind.</s>
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1736 <s xml:id="echoid-s896" xml:space="preserve"/>
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1737 </p>
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1738 <p>
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1739 <s xml:id="echoid-s897" xml:space="preserve">Das Moment oder die Stärke der elektriſchen Ma-<lb/>terie ſcheint von dem Drucke der Atmoſphäre auf dieſelbe, <lb/>und von dem Drucke ihrer Theile ſelbſt gegen einander <lb/>abzuhängen, welcher ſehr groß ſeyn muß, wenn ſich ihre <lb/>Theile berühren, oder durch den unermeßlich weiten Raum <lb/>unmittelbar auf einander wirken.</s>
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1740 <s xml:id="echoid-s898" xml:space="preserve"/>
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1741 </p>
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1742 <p>
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1743 <s xml:id="echoid-s899" xml:space="preserve">Wenn die Elektricität ſchwach und nicht vermögend <lb/>iſt, bis auf eine große Weite zu ſchlagen, ſo iſt der Funken <lb/>geradlinicht; </s>
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1744 <s xml:id="echoid-s900" xml:space="preserve">iſt ſie hingegen ſtark, und ſchlägt ſie auf eine <lb/>größere Weite, ſo nimmt er ſeine Richtung im Zikzak; <lb/></s>
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1745 <s xml:id="echoid-s901" xml:space="preserve">und dies wahrſcheinlich darum, weil die @lüß@gere elektri-<lb/>ſche Materie ſehr ſchnell durch die dichtere und weniger <lb/>flüßige Atmoſphäre durchgehen muß, wobey beyde auf <lb/>einander wirken.</s>
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1746 <s xml:id="echoid-s902" xml:space="preserve"/>
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1747 </p>
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1748 <p>
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1749 <s xml:id="echoid-s903" xml:space="preserve">Man wird aus ſehr vielen Verſuchen ſehen, daß ſich <lb/>die elektriſche Materie zerſtreuer, wofern ihr nicht der <lb/>Druck der Atmoſphäre widerſtehet, der den Funken in <lb/>eine Maſſe zuſammenhält, und dadurch ſeine Stärke und <lb/>ſeinen Glanz vermehret. </s>
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1750 <s xml:id="echoid-s904" xml:space="preserve">Der in der Luft ausbrechende <lb/>Funken iſt lebhaft und dem Blitze ähnlich; </s>
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1751 <s xml:id="echoid-s905" xml:space="preserve">ſtellt man <lb/>aber den Verſuch im luftleeren Raume an, ſo erhält man <lb/>ſtatt des Funkens und der Exploſion bloß ein ſtilles, ſchwa-<lb/>ches und ſeines Ausſtrömen.</s>
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1752 <s xml:id="echoid-s906" xml:space="preserve"/>
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1753 </p>
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1754 <p>
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1755 <s xml:id="echoid-s907" xml:space="preserve"><emph style="bf">Beccaria</emph> ſagt, die Luft widerſtehe dem elektriſchen <lb/>Funken im Verhältniß ihrer Dichte, und der Dicke der <lb/>Schicht, die ſie dem Funken entgegenſetzt, oder der Länge <lb/>des Weges, den ſie dem Funken durch ihre Subſtanz öf-<lb/>net. </s>
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1756 <s xml:id="echoid-s908" xml:space="preserve">Er zeigt auch durch viele Verſuche, daß die Luft von <lb/>der elektriſchen Materie nach allen Richtungen ausgetrie-<lb/>ben wird, mit einer Gewalt, deren Wirtung nicht ſo-<lb/>gleich aufhöret.</s>
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1757 <s xml:id="echoid-s909" xml:space="preserve"/>
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1758 </p>
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1759 <pb o="52" file="0072" n="72" rhead="Fünftes Capitel."/>
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1760 <p>
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1761 <s xml:id="echoid-s910" xml:space="preserve">Die Farbe des elektriſchen Funkens iſt nach dem <lb/>Maaße ſeiner Dichtigkeit verſchieden: </s>
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1762 <s xml:id="echoid-s911" xml:space="preserve">iſt er dünn, ſo hat <lb/>er eine bläuliche, iſt er dichter, eine purpurrothe Farbe <lb/>und iſt er ſehr concentrit, ſo zeigt er ſich weiß und hell, <lb/>wie das Licht der Sonne.</s>
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1763 <s xml:id="echoid-s912" xml:space="preserve"/>
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1764 </p>
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1765 <p>
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1766 <s xml:id="echoid-s913" xml:space="preserve">Oft@ſcheint der mittlere Theil des elektriſchen Fun-<lb/>kens dünner, und fällt ins röthliche oder violetblaue, da <lb/>hingegen die Enden lebhafter und weiß ausſehen, wahr-<lb/>ſcheinlich darum, weil die elektriſche Materie den größten <lb/>Widerſtand bey ihrem Eingange und Ausgange findet.</s>
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1767 <s xml:id="echoid-s914" xml:space="preserve"/>
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1768 </p>
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1769 <p>
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1770 <s xml:id="echoid-s915" xml:space="preserve">Bisweilen theilt ſich der Funken, wie in Fig. </s>
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1771 <s xml:id="echoid-s916" xml:space="preserve">30, in <lb/>viele Theile. </s>
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1772 <s xml:id="echoid-s917" xml:space="preserve">Die Stralen des Büſchels vereinigen ſich <lb/>an dem Orte, wo ſie in die Kugel ſchlagen, wieder mit <lb/>einander, und bilden auf derſelben viele dichte und helle <lb/>Funken.</s>
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1773 <s xml:id="echoid-s918" xml:space="preserve"/>
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1774 </p>
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1775 </div>
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1776 <div xml:id="echoid-div75" type="section" level="1" n="72">
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1777 <head xml:id="echoid-head78" xml:space="preserve">54. Verſuch.</head>
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1778 <p>
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1779 <s xml:id="echoid-s919" xml:space="preserve">Man bringe eine elfenbeinerne Kugel an den Con-<lb/>ductor, und ziehe einen ſtarken Funken aus derſelben (oder <lb/>laſſe den Schlag einer leidner Flaſche durch ihren Mittel-<lb/>punkt gehen), ſo wird die Kugel durchaus leuchtend er-<lb/>ſcheinen. </s>
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1780 <s xml:id="echoid-s920" xml:space="preserve">Geht der Schlag nicht durch den Mittelpunkt, <lb/>ſo ſtreift er über die Oberfläche der Kugel, und greift <lb/>dieſelbe an.</s>
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1781 <s xml:id="echoid-s921" xml:space="preserve"/>
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1782 </p>
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1783 </div>
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1784 <div xml:id="echoid-div76" type="section" level="1" n="73">
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1785 <head xml:id="echoid-head79" xml:space="preserve">55. Verſuch.</head>
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1786 <p>
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1787 <s xml:id="echoid-s922" xml:space="preserve">Man laſſe einen Funken durch eine Kugel von <lb/>Buchsbaumholz gehen, ſo wird dieſelbe eine ſchöne carmin-<lb/>oder vielmehr ſcharlachrothe Farbe zeigen. </s>
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1788 <s xml:id="echoid-s923" xml:space="preserve">Man kann <lb/>auch den Schlag durch Stücken Holz von verſchiedner <lb/>Stärke und Dichtigkeit gehen laſſen, wodurch ſich ein wei-<lb/>tes Feld zu Beobachtungen und Verſuchen eröfnet.</s>
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1789 <s xml:id="echoid-s924" xml:space="preserve"/>
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1790 </p>
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1791 <p>
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1792 <s xml:id="echoid-s925" xml:space="preserve">Die beyden vorhergehenden Verſuche haben ſo viel <lb/>ähnliches mit dem berühmten Verſuche des Hawksbee, <lb/>und einigen andern ſeitdem angeſtellten, daß ich auch dieſe <lb/>noch beyfügen will, in Hofnung, daß ſie zu fernern Un-
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1793 <pb o="53" file="0073" n="73" rhead="Vom elektriſchen Funken."/>
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1794 terſuchungen dieſes merkwürdigen Gegenſtandes Anlaß ge-<lb/>ben werden.</s>
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1795 <s xml:id="echoid-s926" xml:space="preserve"/>
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1796 </p>
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1797 </div>
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1798 <div xml:id="echoid-div77" type="section" level="1" n="74">
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1799 <head xml:id="echoid-head80" xml:space="preserve">56. Verſuch.</head>
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1800 <p>
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1801 <s xml:id="echoid-s927" xml:space="preserve"><emph style="bf">Hawksbee</emph> beſtrich die innere Seite einer Glasku-<lb/>gel über die <emph style="bf">Helfte</emph> mit Siegellak, zog die Luft aus der <lb/>Kugel, und drehte ſie. </s>
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1802 <s xml:id="echoid-s928" xml:space="preserve">Als er nun, um ihre Elektricität <lb/>zu erregen, die Hand daran legte, ſo ſahe er die Geſtalt <lb/>und das Bild ſeiner Hand ſehr deutlich inwendig an der <lb/>hohlen Fläche des Siegellaks, als ob ſich zwiſchen ſeinem <lb/>Auge und der Hand nichts weiter, als Glas, befände. <lb/></s>
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1803 <s xml:id="echoid-s929" xml:space="preserve">Der Ueberzug von Siegellak war an den dünnſten Stellen <lb/>gerade ſo ſtark, daß man den Schein einer Lichtflamme <lb/>dadurch ſehen konnte. </s>
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1804 <s xml:id="echoid-s930" xml:space="preserve">An andern Stellen war das Sie-<lb/>gellak wenigſtens einen Achtel Zoll dick; </s>
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1805 <s xml:id="echoid-s931" xml:space="preserve">aber eben an die-<lb/>ſen Stellen war das Bild der Hand eben ſo deutlich, als <lb/>an den andern, zu erkennen.</s>
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1806 <s xml:id="echoid-s932" xml:space="preserve"/>
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1807 </p>
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1808 <p>
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1809 <s xml:id="echoid-s933" xml:space="preserve"><emph style="bf">Beccaria</emph> ließ einen elektriſchen Schlag durch et-<lb/>was feinen meſſingenen Feilſtaub durchgehen, der zwiſchen <lb/>zwo Platten Siegellak geſtreuet war; </s>
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1810 <s xml:id="echoid-s934" xml:space="preserve">dabey wurde alles <lb/>leuchtend und durchſichtig.</s>
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1811 <s xml:id="echoid-s935" xml:space="preserve"/>
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1812 </p>
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1813 </div>
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1814 <div xml:id="echoid-div78" type="section" level="1" n="75">
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1815 <head xml:id="echoid-head81" xml:space="preserve">57. Verſuch.</head>
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1816 <p>
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1817 <s xml:id="echoid-s936" xml:space="preserve"><emph style="bf">Dieſer von D. Prieſtley</emph> angeſtellte außerordentli-<lb/>che Verſuch wird von ihm ſelbſt ſo beſchrieben. </s>
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1818 <s xml:id="echoid-s937" xml:space="preserve">“Ich <lb/>legt eine Kette, die mit der äußern Seite einer Flaſche <lb/>verbunden war, ganz leicht an meinen Finger, und hielt <lb/>ſie bisweilen vermittelſt eines dünnen Stücks Glas nahe <lb/>an den Knopf. </s>
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1819 <s xml:id="echoid-s938" xml:space="preserve">Ließ ich nun den Schlag in der Ent-<lb/>fernung von ohngefähr drey Zollen hindurchgehen, <lb/>ſo war das elektriſche Licht an der Oberfläche des <lb/>Fingers ſichtbar, und gab demſe@ben eine plötzliche <lb/>Erſchütterung, welche dem Gefühl nach bis in das <lb/>innerſte Mark des Knochens drang: </s>
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1820 <s xml:id="echoid-s939" xml:space="preserve">geſchahe dies an <lb/>derjenigen Seite des Fingers, welche vom Auge abge-
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1821 <pb o="54" file="0074" n="74" rhead="Fünftes Capitel."/>
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1822 kehrt war, ſo ſchien im Dunklen der ganze Finger voll-<lb/>kommen durchſichtig.</s>
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1823 <s xml:id="echoid-s940" xml:space="preserve">֦</s>
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1824 </p>
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1825 </div>
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1826 <div xml:id="echoid-div79" type="section" level="1" n="76">
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1827 <head xml:id="echoid-head82" xml:space="preserve">58. Verſuch.</head>
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1828 <p>
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1829 <s xml:id="echoid-s941" xml:space="preserve">Man verbinde das eine Ende einer Kette mit der<unsure/> <lb/>äußern Seite einer geladenen Flaſche, und laſſe das an-<lb/>dere auf dem Tiſche liegen. </s>
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1830 <s xml:id="echoid-s942" xml:space="preserve">Man ſtelle das Ende einer <lb/>andern Kette ohngefähr einen Viertel Zoll weit von dem <lb/>erſten ab, ſeße ein Gefäß mit Waſſer auf dieſe neben ein-<lb/>ander liegende Enden, und entlade die Flaſche durch die <lb/>Kette, ſo wird das Waſſer vollkommen und ſehr ſchön er-<lb/>leuchtet ſcheinen. </s>
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1831 <s xml:id="echoid-s943" xml:space="preserve">Dieſen Verſuch habe ich von Herrn <lb/><emph style="bf">Haas</emph>, dem Erfinder einer verbeſſerten Luftpumpe, welche <lb/>die bisher gewöhnlichen ſehr weit übertrift.</s>
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1832 <s xml:id="echoid-s944" xml:space="preserve"/>
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1833 </p>
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1834 <p>
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1835 <s xml:id="echoid-s945" xml:space="preserve">Zeigen nicht dieſe Verſuche’<unsure/>, daß es ſowohl in elek-<lb/>triſchen als nichtelektriſchen Körpern eine feine Materie <lb/>giebt, w@lche die Körper durchſichtig macht, wenn ſie in <lb/>Bewegung geſetzt wird?</s>
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1836 <s xml:id="echoid-s946" xml:space="preserve"/>
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1837 </p>
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1838 </div>
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1839 <div xml:id="echoid-div80" type="section" level="1" n="77">
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1840 <head xml:id="echoid-head83" xml:space="preserve">59. Verſuch.</head>
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1841 <p>
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1842 <s xml:id="echoid-s947" xml:space="preserve">Wenn die Funken über ein Stück Silberpapier ge-<lb/>hen, ſo erhalten ſie eine grüne Farbe.</s>
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1843 <s xml:id="echoid-s948" xml:space="preserve"/>
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1844 </p>
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1845 </div>
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1846 <div xml:id="echoid-div81" type="section" level="1" n="78">
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1847 <head xml:id="echoid-head84" xml:space="preserve">60. Verſuch.</head>
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1848 <p>
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1849 <s xml:id="echoid-s949" xml:space="preserve">E F, Fig. </s>
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1850 <s xml:id="echoid-s950" xml:space="preserve">31, iſt eine Glasröhre, um welche her-<lb/>um von einem Ende zum andern, in kleinen, aber gleichen <lb/>Entfernungen von einander, Stücken Stanniol in einer <lb/>Spirallinie (daher ſie auch die Spiralröhre heißt) ge-<lb/>klebt ſind. </s>
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1851 <s xml:id="echoid-s951" xml:space="preserve">Dieſe Röhre ſteckt in einer größern, welche <lb/>letztere an beyden Enden in meſſingene Kappen gefaſſet <lb/>iſt, die mit dem Stanniol der innern Röhre in Verbin-<lb/>dung ſtehen. </s>
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1852 <s xml:id="echoid-s952" xml:space="preserve">Man halte das eine Ende in der Hand, <lb/>und bringe das andere ſo nahe an den erſten Leiter, daß <lb/>ein Funken entſtehen kann, ſo wird man an jedem Raume <lb/>zwiſchen zweyen neben einander liegenden Stanniolblätt-
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1853 <pb o="55" file="0075" n="75" rhead="Vom elektriſchen Funken."/>
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1854 chen einen ſchönen und hellen Funken ſehen; </s>
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1855 <s xml:id="echoid-s953" xml:space="preserve">dadurch wird <lb/>der aus dem Conductor gezogene Funken gleichſam ver-<lb/>vielfältiget, denn wäre keine Unterbrechung im Stanniol, <lb/>@o würde die elektriſche Materie unbemerkt übergehen.</s>
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1856 <s xml:id="echoid-s954" xml:space="preserve"/>
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1857 </p>
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1858 </div>
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1859 <div xml:id="echoid-div82" type="section" level="1" n="79">
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1860 <head xml:id="echoid-head85" xml:space="preserve">61. Verſuch.</head>
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1861 <head xml:id="echoid-head86" xml:space="preserve">Leuchtende Buchſtaben.</head>
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1862 <p>
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1863 <s xml:id="echoid-s955" xml:space="preserve">Dieſer Verſuch beruht auf einerley Grundſätzen mit <lb/>dem vorigen. </s>
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1864 <s xml:id="echoid-s956" xml:space="preserve">Die Buchſtaben werden durch die kleinen <lb/>Unterbrechungen gebildet, welche man in einem auf Glas <lb/>geklebten Stück Stanniol macht; </s>
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1865 <s xml:id="echoid-s957" xml:space="preserve">das Glas wird in einen <lb/>Rahmen von gedörrtem Holze befeſtiget, wie Fig. </s>
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1866 <s xml:id="echoid-s958" xml:space="preserve">32. <lb/></s>
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1867 <s xml:id="echoid-s959" xml:space="preserve">Um den Verſuch anzuſtellen, halte man den Rahmen in <lb/>der Hand, und nähere die Kugel G an den Conductor, <lb/>ſo wird der Funken aus demſelben in den Stanniol über-<lb/>gehen, und ihm durch alle ſeine Windungen folgen, bis <lb/>an den Haken h, der ihn durch eine angehangene Kette <lb/>in den Boden führt: </s>
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1868 <s xml:id="echoid-s960" xml:space="preserve">die bey jeder Unterbrechung entſte-<lb/>henden Funken bilden ein Wort mit leuchtenden Buch-<lb/>ſtaben.</s>
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1869 <s xml:id="echoid-s961" xml:space="preserve"/>
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1870 </p>
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1871 </div>
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1872 <div xml:id="echoid-div83" type="section" level="1" n="80">
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1873 <head xml:id="echoid-head87" xml:space="preserve">62. Verſuch.</head>
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1874 <p>
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1875 <s xml:id="echoid-s962" xml:space="preserve">Um einen Funken mit einer metallenen Spitze aus-<lb/>zuziehen, ſchraube man einen zugeſpitzten meſſingenen <lb/>Drath an das eine Ende einer Spiralröhre, und halte die-<lb/>felbe gegen den Conductor, indem die Maſchine gedrehet <lb/>wird, ſo wird zwiſchen dem Conductor und der Spitze ein <lb/>ſtarker Funken entſtehen.</s>
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1876 <s xml:id="echoid-s963" xml:space="preserve"/>
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1877 </p>
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1878 </div>
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1879 <div xml:id="echoid-div84" type="section" level="1" n="81">
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1880 <head xml:id="echoid-head88" xml:space="preserve">63. Verſuch.</head>
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1881 <p>
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1882 <s xml:id="echoid-s964" xml:space="preserve">Man nehme eine reine trockne Glasröhre, die im <lb/>Lichten ohngefähr einen Viertel Zoll weit iſt, ſtecke einen <lb/>zugeſpitzten Drath in dieſe Röhre, ſtelle das zugeſpitzte <lb/>Ende in einige Entfernung von dem Ende der Röhre, ver-<lb/>binde das andere Ende mit dem Boden, und bringe das
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1883 <pb o="56" file="0076" n="76" rhead="Fünftes Capitel."/>
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1884 vorgedachte Ende gegen den Conductor der Maſchine, ſo <lb/>werden ſich zwiſchen demſelben und der Spitze ſtarke im <lb/>Zikzak gehende Funken zeigen, und ein ſtarkes Geräuſch <lb/>verurſachen.</s>
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1885 <s xml:id="echoid-s965" xml:space="preserve"/>
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1886 </p>
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1887 <p>
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1888 <s xml:id="echoid-s966" xml:space="preserve">Im 62 ſten Verſuche macht die Trennung zwiſchen <lb/>den Stücken Stanniol einen Widerſtand, welcher den <lb/>unmittelbaren Uebergang der elektriſchen Materie hindert, <lb/>und auf dieſe Art die gewöhnliche Wirkung der Spitzen <lb/>auf den Conductor einigermaſſen verändert. </s>
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1889 <s xml:id="echoid-s967" xml:space="preserve">Oder mit <lb/>andern Worten: </s>
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1890 <s xml:id="echoid-s968" xml:space="preserve">das Vermögen der Spitzen, den Schlag <lb/>zu verhüten, hängt von der vollkommenen und unterbro-<lb/>chenen metalliſchen Verbindung derſelben mit der Erde <lb/>ab; </s>
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1891 <s xml:id="echoid-s969" xml:space="preserve">obgleich auch dieſe noch nicht ganz hinreichend iſt, wie <lb/>der 63 ſte Verſuch zeigt, wo die elektriſche Materie von <lb/>der nichtleitenden Subſtanz, welche die Spitze umringt, <lb/>concentriret und eingeſammlet wird.</s>
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1892 <s xml:id="echoid-s970" xml:space="preserve"/>
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1893 </p>
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1894 </div>
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1895 <div xml:id="echoid-div85" type="section" level="1" n="82">
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1896 <head xml:id="echoid-head89" xml:space="preserve">64. Verſuch.</head>
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1897 <p>
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1898 <s xml:id="echoid-s971" xml:space="preserve">Man ſtelle jemand auf<unsure/> den iſolirenden Stuhl, und <lb/>verbinde ihn durch einen Drath oder eine Kette mit dem <lb/>Conductor, ſo wird er eben dasjenige bewirken können, <lb/>was der Conductor thut; </s>
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1899 <s xml:id="echoid-s972" xml:space="preserve">er wird leichte Körper anziehen, <lb/>Funken geben u. </s>
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1900 <s xml:id="echoid-s973" xml:space="preserve">ſ. </s>
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1901 <s xml:id="echoid-s974" xml:space="preserve">w. </s>
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1902 <s xml:id="echoid-s975" xml:space="preserve">und ſo wird man eine Menge ſehr <lb/>angenehmer Verſuche anſtellen können. </s>
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1903 <s xml:id="echoid-s976" xml:space="preserve">Es iſt hiebey <lb/>ſchlechterdings nothwendig, wenn der Verſuch vollkom-<lb/>men gelingen ſoll, daß kein Theil der Kleidung den Bo-<lb/>den des Zimmers oder den Tiſch berühre, und daß die <lb/>G@asfüße des Stuhls ſehr trocken ſind. </s>
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1904 <s xml:id="echoid-s977" xml:space="preserve">Um die Iſoli-<lb/>rung deſto vollkommener zu machen, wird ein untergeleg-<lb/>ter trockner Bogen braun Papier ſehr gute Dienſte thun.</s>
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1905 <s xml:id="echoid-s978" xml:space="preserve"/>
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1906 </p>
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1907 <p>
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1908 <s xml:id="echoid-s979" xml:space="preserve">Legt die iſolirte Perſon ihre Hand auf die Kleidung <lb/>einer andern nicht iſolirten, ſo werden beyde, beſonders, <lb/>wenn die Kleidung von Wollenzeug iſt, eine Empfindung <lb/>fühlen, als ob ſie mit vielen Nadeln geſtochen würden, ſo <lb/>lang der Cylinder bewegt wird.</s>
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1909 <s xml:id="echoid-s980" xml:space="preserve"/>
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1910 </p>
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1911 <pb o="57" file="0077" n="77" rhead="Vom elektriſchen Funken."/>
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1912 </div>
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1913 <div xml:id="echoid-div86" type="section" level="1" n="83">
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1914 <head xml:id="echoid-head90" xml:space="preserve">65. Verſuch.</head>
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1915 <p>
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1916 <s xml:id="echoid-s981" xml:space="preserve">Um brennbare Geiſter mit dem elektriſchen Funken <lb/>zu entzünden, erwärme man den Löffel, Fig. </s>
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1917 <s xml:id="echoid-s982" xml:space="preserve">33, gieße <lb/>ein wenig Weingeiſt hinein, und befeſtige ihn mit dem <lb/>daran befindlichen Stiele an das Ende des erſten Leiters; <lb/></s>
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1918 <s xml:id="echoid-s983" xml:space="preserve">oder man zünde den Weingeiſt an, und blaſe die Flamme <lb/>kurz vor dem Berſuche wieder aus; </s>
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1919 <s xml:id="echoid-s984" xml:space="preserve">dann laſſe man ver-<lb/>mittelſt einer meſſingenen Kugel einen Funken mitten <lb/>durch den Löffel gehen, ſo wird derſelbe den Weingeiſt <lb/>entzünden.</s>
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1920 <s xml:id="echoid-s985" xml:space="preserve"/>
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1921 </p>
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1922 <p>
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1923 <s xml:id="echoid-s986" xml:space="preserve">Oder man laſfe jemand, der auf einem iſolirenden <lb/>Stuhle ſtehet und mit dem erſten Leiter verbunden iſt, den <lb/>Löffel mit dem Weingeiſte in der Hand halten, und eine <lb/>auf dem Boden des Zimmers ſtehende Perſon einen Fun-<lb/>ken daraus ziehen, ſo wird der Weingeiſt entzündet wer-<lb/>den. </s>
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1924 <s xml:id="echoid-s987" xml:space="preserve">Der Verſuch geht eben ſo wohl von ſtatten, wenn <lb/>die auf dem Boden ſtehende Perſon den Löffel hält, und <lb/>die iſolirte den Funken zieht.</s>
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1925 <s xml:id="echoid-s988" xml:space="preserve"/>
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1926 </p>
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1927 </div>
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1928 <div xml:id="echoid-div87" type="section" level="1" n="84">
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1929 <head xml:id="echoid-head91" xml:space="preserve">66. Verſuch.</head>
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1930 <p>
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1931 <s xml:id="echoid-s989" xml:space="preserve">Setzt man ein Gefäß mit angezündetem Terpentinöl <lb/>auf den Conductor, und läßt den Dampf davon an eine <lb/>Platte gehen, welche von einer iſolirten Perſon gehalten <lb/>wird, ſo wird dieſe dadurch elektriſiret werden und Wein-<lb/>geiſt anzünden können u. </s>
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1932 <s xml:id="echoid-s990" xml:space="preserve">ſ. </s>
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1933 <s xml:id="echoid-s991" xml:space="preserve">w. </s>
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1934 <s xml:id="echoid-s992" xml:space="preserve">Hält dieſe iſolirte Perſon <lb/>einen meſſingenen Drath an die Spitze der Flamme von <lb/>brennendem Weingeiſt, welcher mit dem Conductor ver-<lb/>bunden iſt, ſo wird ſie ebenfalls elektriſiret. </s>
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1935 <s xml:id="echoid-s993" xml:space="preserve">Wir ſehen <lb/>hieraus, daß ſowohl Rauch als Flamme Leiter der elektri-<lb/>ſchen Materie ſind.</s>
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1936 <s xml:id="echoid-s994" xml:space="preserve"/>
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1937 </p>
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1938 <p>
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1939 <s xml:id="echoid-s995" xml:space="preserve">Herr <emph style="bf">Volta</emph> hat auch aus dem bloßen Dampfe des <lb/>Waſſers und aus einigen chemiſchen Gährungen unbe-<lb/>zweifelte Zeichen der Elektricität erhalten.</s>
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1940 <s xml:id="echoid-s996" xml:space="preserve"/>
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1941 </p>
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1942 <pb o="58" file="0078" n="78" rhead="Fünftes Capitel."/>
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1943 </div>
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1944 <div xml:id="echoid-div88" type="section" level="1" n="85">
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1945 <head xml:id="echoid-head92" xml:space="preserve">67. Verſuch.</head>
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1946 <p>
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1947 <s xml:id="echoid-s997" xml:space="preserve">Man iſolire eine kleine Kohlenpfanne mit drey oder <lb/>vier glühenden Kohlen, und ſchütte einen Löffel voll Waſ-<lb/>ſer auf die Kohlen, ſo wird ein mit den Kohlen durch <lb/>einen Drath verbundenes Elektrometer in kurzer Zeit mit <lb/>negativer Elektricität aus einander gehen.</s>
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1948 <s xml:id="echoid-s998" xml:space="preserve"/>
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1949 </p>
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1950 <p>
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1951 <s xml:id="echoid-s999" xml:space="preserve">Man ſieht hieraus, daß die Dämpfe des Waſſers, <lb/>und überhaupt diejenigen Theile eines Körpers, welche <lb/>durch die Verflüchtigung getrennt werden, nicht nur einen <lb/>Theil des Elementarfeuers, ſondern auch einen Theil der <lb/>elektriſchen Materie mit ſich hinwegführen, ſo daß der <lb/>Körper, von welchem ſich dieſe verflüchtigten Theile ge-<lb/>trennt haben, nicht nur abgekühlt, ſondern auch negativ <lb/>elektriſirt wird, woraus zugleich erhellet, @aß bey der <lb/>Auflöſung der Körper in flüchtige elaſtiſche Materien ihre <lb/>Fähigkeit, Feuermatcrie und elektriſche Materie zu ent-<lb/>hallen, vermehrt wird.</s>
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1952 <s xml:id="echoid-s1000" xml:space="preserve"/>
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1953 </p>
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1954 <p>
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1955 <s xml:id="echoid-s1001" xml:space="preserve">Es giebt eine entzündbare Luftgattung@ welche ſich <lb/>ſehr oft in den Steinkohlenſchächten erzeuget: </s>
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1956 <s xml:id="echoid-s1002" xml:space="preserve">auch iſt die-<lb/>jenige Luft, welche man durch Stören im Schlamme der <lb/>ſtehenden Wäſſer erhält, entzündbar. </s>
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1957 <s xml:id="echoid-s1003" xml:space="preserve">Eben dieſe Luft <lb/>ſteigt aus faulenden thieriſchen Materien auf, wird auch <lb/>durch die Deſtillation aus Wachs, Pech, Bernſtein, Koh-<lb/>len und andern phlogiſtiſchen Subſtanzen erhalten. </s>
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1958 <s xml:id="echoid-s1004" xml:space="preserve">Die <lb/>bequemſte Methode, ſ@e zu erhalten, iſt folgende. </s>
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1959 <s xml:id="echoid-s1005" xml:space="preserve">Man <lb/>ſchütte kleine Nägel oder etwas Eiſenfeile in die Flaſche r <lb/>Fig. </s>
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1960 <s xml:id="echoid-s1006" xml:space="preserve">38, gieße ſo viel Waſſer darauf, als ſie gerade be-<lb/>deckt, und thue ohngefähr den vierten Theil Vitriolöl <lb/>hinzu, ſtecke das untere Ende der gebognen Röhre s in <lb/>den Hals der Flaſche, und bringe das andere Ende durch <lb/>das Waſſer des Beckens T in den Hals der Flaſche K, <lb/>welche mit Waſſer gefüllt iſt und im Becken umgekehrt <lb/>ſtehet, auch während der Operation gehalten werden muß: <lb/></s>
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1961 <s xml:id="echoid-s1007" xml:space="preserve">ſo wird die Miſchung in r in kurzer Zeit aufbrauſen, und <lb/>eine flüßige Materie aufſteigen laſſen, welche durch die
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1962 <pb o="59" file="0079" n="79" rhead="Vom elektriſchen Funken."/>
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1963 gebogne Röhre in die Flaſche K übergehen, das Waſſer <lb/>aus derſelben heraus treiben, und ſie endlich ganz anfüllen <lb/>wird. </s>
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1964 <s xml:id="echoid-s1008" xml:space="preserve">Alsdenn nimmt man die Flaſche hinweg, und ver-<lb/>ſtopſt ſie ſo geſchwind, als möglich.</s>
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1965 <s xml:id="echoid-s1009" xml:space="preserve"/>
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1966 </p>
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1967 <p>
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1968 <s xml:id="echoid-s1010" xml:space="preserve">Fig. </s>
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1969 <s xml:id="echoid-s1011" xml:space="preserve">39. </s>
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1970 <s xml:id="echoid-s1012" xml:space="preserve">ſtellt eine me ſſingene Piſtole zum Abfeu-<lb/>ern der entzündbaren Luft vor; </s>
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1971 <s xml:id="echoid-s1013" xml:space="preserve">a b iſt eine meſſingene Kam-<lb/>mer, in deren Oefnung a c ein Korkſtöpſel eingepaſſet iſt; <lb/></s>
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1972 <s xml:id="echoid-s1014" xml:space="preserve">an den Boden dieſer Kammer iſt ein durchbohrtes Stück <lb/>Meſſing angeſchraubt, (welches Fig. </s>
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1973 <s xml:id="echoid-s1015" xml:space="preserve">40. </s>
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1974 <s xml:id="echoid-s1016" xml:space="preserve">für ſich allein <lb/>vorgeſtellt iſt) in die Höhlung deſſelben iſt eine gläſerne <lb/>Röhre, und in dieſe wiederum ein meſſingener Drath ein-<lb/>geküttet. </s>
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1975 <s xml:id="echoid-s1017" xml:space="preserve">Das eine Ende dieſes Draths iſt mit einem <lb/>meſſingenen Knopfe verſehen, das andere Ende aber ſo <lb/>gebogen, daß es ohngefähr einen Zehntel Zoll von dem meſ-<lb/>ſingenen Stück abſtehet. </s>
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1976 <s xml:id="echoid-s1018" xml:space="preserve">Fig. </s>
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1977 <s xml:id="echoid-s1019" xml:space="preserve">41. </s>
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1978 <s xml:id="echoid-s1020" xml:space="preserve">iſt eine m@ſſingene <lb/>Haube, welche man an die Piſtole ſchrauben kann, um <lb/>die Glasröhre für dem Zerbrechen zu ſichern. </s>
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1979 <s xml:id="echoid-s1021" xml:space="preserve">Die Luſ<unsure/>t, <lb/>womit die Piſtole geladen werden ſoll, muß man in einer <lb/>verſtopften Flaſche aufbewahren. </s>
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1980 <s xml:id="echoid-s1022" xml:space="preserve">Man ziehe den Stöp-<lb/>ſel heraus, und bringe in demſelben Augenblicke die Oef-<lb/>nung der Piſtole an den Mund der Flaſche, ſo werden <lb/>ſich die gemeine und die entzündbare Luft mit einander ver-<lb/>miſchen, weil die erſtere leichter als die letztere iſt, und <lb/>alſo natürlicher Weiſe herunter ſinken muß. </s>
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1981 <s xml:id="echoid-s1023" xml:space="preserve">Man halte <lb/>die Piſtole etwa 15 Secunden lang in dieſer Stellung, <lb/>nehme ſie alsdann hinweg, und verſtopfe Flaſche und Pi-<lb/>ſtole mit der möglichſten Geſchwindigkeit.</s>
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1982 <s xml:id="echoid-s1024" xml:space="preserve"/>
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1983 </p>
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1984 <p>
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1985 <s xml:id="echoid-s1025" xml:space="preserve">Hält man die Piſtole allzulang über die Flaſche, ſo <lb/>daß ſie ſich ganz mit entzündbarer Luft anfüllt, ſo wird <lb/>ſ<unsure/>ie nicht explodiren.</s>
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1986 <s xml:id="echoid-s1026" xml:space="preserve"/>
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1987 </p>
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1988 </div>
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1989 <div xml:id="echoid-div89" type="section" level="1" n="86">
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1990 <head xml:id="echoid-head93" xml:space="preserve">68. Verſuch.</head>
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1991 <p>
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1992 <s xml:id="echoid-s1027" xml:space="preserve">Man bringe die Kugel der mit brennbarer Luft gela-<lb/>denen Piſtole gegen den Conductor, oder gegen den Knopf <lb/>@iner geladenen Flaſche, ſo wird der Funken, welcher zwi-
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1993 <pb o="60" file="0080" n="80" rhead="Fünftes Capitel."/>
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1994 ſchen dem Ende des Draths f und dem Stück g Fig. </s>
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1995 <s xml:id="echoid-s1028" xml:space="preserve">40 <lb/>entſteht, die brennbare Luft entzünden, und den Kork-<lb/>ſtöpſel bis auf eine beträchtliche Weite heraustreiben. <lb/></s>
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1996 <s xml:id="echoid-s1029" xml:space="preserve">Dieſe Luftgattung erfordert, wenn ſie ſich entzünden ſoll, <lb/>ſo wie überhaupt alle Körper, die Gegenwart der gemei-<lb/>nen Luft oder der Salpeterſäure; </s>
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1997 <s xml:id="echoid-s1030" xml:space="preserve">wenn man ſie aber mit <lb/>etwas gemeiner Luft vermiſchet, ſo wird ſie durch den elek-<lb/>triſchen Funken entzündet, und macht eine Erploſion.</s>
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1998 <s xml:id="echoid-s1031" xml:space="preserve"/>
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1999 </p>
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2000 <p>
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2001 <s xml:id="echoid-s1032" xml:space="preserve">Herr Cavallo empfiehlt denjenigen, welche mit <lb/>entzündbarer und dephlogiſticirter Luft oder mit gegebnen <lb/>Quantitäten von gemeiner und entzündbarer Luft Verſuche <lb/>anſtellen wollen@ eine Piſtole von anderer@ Art. </s>
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2002 <s xml:id="echoid-s1033" xml:space="preserve">Sie beſteht aus <lb/>einer 6 Zoll langen und 1 Zoll weiten meſſingenen Röhre, <lb/>an deren Ende ein durchgebohrtes Stück Holz ſehr ſicher <lb/>befeſtiget iſt; </s>
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2003 <s xml:id="echoid-s1034" xml:space="preserve">ein meſſingner etwa 4 Zoll langer Drath <lb/>iſt ſeiner ganzen Länge nach, ausgenommen an den Enden, <lb/>mit Siegellack, dann mit umgewundener Seide, und dann <lb/>wieder mit Siegellack überzogen. </s>
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2004 <s xml:id="echoid-s1035" xml:space="preserve">Dieſer Drath wird in <lb/>die Oefnung des hölzernen Stücks eingeküttet, ſo daß er <lb/>etwa zween Zoll weit in die Röhre hineinreichet, der übrige <lb/>Theil bleibt auſſerhalb der Röhre; </s>
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2005 <s xml:id="echoid-s1036" xml:space="preserve">der in die Röhre hin-<lb/>eingehende Theil des Draths wird ſo umgebogen, daß er <lb/>von der innern Seite der Röhre nur etwa @ einen Zehntel <lb/>Zoll weit abſteht. </s>
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2006 <s xml:id="echoid-s1037" xml:space="preserve"><anchor type="note" xlink:href="" symbol="*)"/></s>
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2007 </p>
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2008 <p>
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2009 <s xml:id="echoid-s1038" xml:space="preserve">Will man dieſe Piſtole gebrauchen, ſo fülle man ſie <lb/>mit Waſſer, und kehre ſie alsdann in einem Becken mit <lb/>Waſſer um; </s>
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2010 <s xml:id="echoid-s1039" xml:space="preserve">die erforderliche Miſchung von brennbarer <lb/>und gemeiner Luft mache man in einem andern Gefäße, in-<lb/>dem man bekannte und gehörig proportionirte Maaße von <lb/>benden Luftgattungen hineinläßt; </s>
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2011 <s xml:id="echoid-s1040" xml:space="preserve">man laſſe hierauf dieſe <lb/>Miſchung in die Piſtole, verſtopfe ſie mit einem Kork. <lb/></s>
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2012 <s xml:id="echoid-s1041" xml:space="preserve">
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2013 <anchor type="note" xlink:label="note-0080-01a" xlink:href="note-0080-01"/>
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2014 <pb o="61" file="0081" n="81" rhead="Vom elektriſchen Funken."/>
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2015 ſtöpſel, nehme ſie aus dem Waſſer und laſſe auf die ge-<lb/>wöhnliche Art den Schlag einer geladenen Flaſche hin-<lb/>durchgehen, ſo wird ſich die brennbare Luft entzünden.</s>
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2016 <s xml:id="echoid-s1042" xml:space="preserve"/>
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2017 </p>
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2018 <div xml:id="echoid-div89" type="float" level="2" n="1">
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2019 <note symbol="*)" position="foot" xlink:label="note-0080-01" xlink:href="note-0080-01a" xml:space="preserve"> Man ſ. Cavallo Abhandlung von den verſchiedenen <lb/>Gattungen der Luft und anderer beſtändig elaſtiſchen Mate-<lb/>rien, aus dem Engl. überſetzt. Leipzig, 1783, 8. S. 274. u. f.</note>
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2020 </div>
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2021 <p>
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2022 <s xml:id="echoid-s1043" xml:space="preserve">Die Inſtrumente zur Entzündung der brennbaren <lb/>Luft mit dem elektriſchen Funken werden oft auch in Ge-<lb/>ſtalt einer Canone gemacht.</s>
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2023 <s xml:id="echoid-s1044" xml:space="preserve"/>
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2024 </p>
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2025 </div>
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2026 <div xml:id="echoid-div91" type="section" level="1" n="87">
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2027 <head xml:id="echoid-head94" xml:space="preserve">Sechſtes Capitel.</head>
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2028 <head xml:id="echoid-head95" xml:space="preserve">Von elektriſirten Spitzen.</head>
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2029 <head xml:id="echoid-head96" xml:space="preserve">69. Verſuch.</head>
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2030 <p>
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2031 <s xml:id="echoid-s1045" xml:space="preserve">Man halte das zugeſpitzte Ende eines Draths gegen <lb/>einen poſitiv elektriſirten Conductor, ſo wird an <lb/>der Spitze ein heller runder Punkt oder Stern erſcheinen, <lb/>und die elektriſche Materie wird augenſcheinlich aus dem <lb/>Conductor fortgeführt und zerſtreuet werden.</s>
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2032 <s xml:id="echoid-s1046" xml:space="preserve"/>
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2033 </p>
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2034 </div>
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2035 <div xml:id="echoid-div92" type="section" level="1" n="88">
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2036 <head xml:id="echoid-head97" xml:space="preserve">70. Verſuch.</head>
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2037 <p>
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2038 <s xml:id="echoid-s1047" xml:space="preserve">Man halte den zugeſpitzten Drath gegen einen nega-<lb/>tiv elektriſirten Conductor; </s>
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2039 <s xml:id="echoid-s1048" xml:space="preserve">ſo wird man einen aus der <lb/>Spitze ausſ@römenden hellen Stralenkegel oder Stralen-<lb/>büſchel ſehen, und die Menge der elektriſchen Materie <lb/>wird zunehmen.</s>
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2040 <s xml:id="echoid-s1049" xml:space="preserve"/>
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2041 </p>
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2042 </div>
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2043 <div xml:id="echoid-div93" type="section" level="1" n="89">
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2044 <head xml:id="echoid-head98" xml:space="preserve">71. Verſuch.</head>
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2045 <p>
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2046 <s xml:id="echoid-s1050" xml:space="preserve">An den einſaugenden Spitzen (Collector) am poſitiven <lb/>Conductor ſieht man den leuchtenden Punkt; </s>
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2047 <s xml:id="echoid-s1051" xml:space="preserve">an einer ans <lb/>Ende des Conductors angeſteckten Spitze aber zeigt ſich <lb/>ein divergirender Stralenkegel.</s>
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2048 <s xml:id="echoid-s1052" xml:space="preserve"/>
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2049 </p>
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2050 </div>
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2051 <div xml:id="echoid-div94" type="section" level="1" n="90">
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2052 <head xml:id="echoid-head99" xml:space="preserve">72. Verſuch.</head>
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2053 <p>
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2054 <s xml:id="echoid-s1053" xml:space="preserve">Am Collector des negativen Conductors zeigt ſich der <lb/>Stralenkegel; </s>
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2055 <s xml:id="echoid-s1054" xml:space="preserve">an einer ans Ende des Conductors befeſtig-<lb/>ten Spitze hingegen der leuchtende Punkt.</s>
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2056 <s xml:id="echoid-s1055" xml:space="preserve"/>
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2057 </p>
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2058 <pb o="62" file="0082" n="82" rhead="Sechſtes Capitel."/>
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2059 <p>
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2060 <s xml:id="echoid-s1056" xml:space="preserve">Die Leichtigkeit, mit welcher die Spitzen die elektri-<lb/>ſche Materie annehmen und mittheilen, und die verſchie-<lb/>denen Erſcheinungen des Lichts an den Spitzen in verſchie-<lb/>denen Verſuchen, haben vielen Phyſikern Anlaß gegeben <lb/>zu glauben, daß dieſe Erſcheinungen die Richtungen der <lb/>elektriſchen Materie auf eine ganz entſcheidende Art bewie-<lb/>ſen. </s>
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2061 <s xml:id="echoid-s1057" xml:space="preserve">Sie nehmen an, die Erſcheinung des runden Lichts <lb/>oder Sterns ſey ein Zeichen, daß die elektr@ſche Materie <lb/>in die Spitze eindringe, aus derjenigen Spitze hingegen, <lb/>an welcher der helle Kegel oder Büſchel erſcheint, ſtröme <lb/>die Materie aus. </s>
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2062 <s xml:id="echoid-s1058" xml:space="preserve">Dieſe Meinung beſtätiget ſich dadurch, <lb/>daß dieſe Erſcheinungen den Geſetzen der Bewegung an-<lb/>derer flüſſiger Materien gemäß ſind, welche beym Aus-<lb/>ſtrömen durch den Widerſtand der Luft eben ſo divergent <lb/>gemacht werden, wie die elektriſche Materie, welche aus <lb/>einer am Ende des poſitiven Conductors befeſtigten Spitze <lb/>ausſtrömt. </s>
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2063 <s xml:id="echoid-s1059" xml:space="preserve">Man hat zwar den Einwurf gemacht, daß <lb/>man die Stralen auch ſo anſehen könne, als ob ſie aus <lb/>eben ſo vielen Punkten der umliegenden Luft gegen die me-<lb/>talliſche Spitze zuſtrömten. </s>
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2064 <s xml:id="echoid-s1060" xml:space="preserve">Es iſt aber ſchwer anzuge-<lb/>ben, warum ein ſichtbarer Stral eher aus einem Punkte <lb/>der Atmoſphäre ausbrechen ſollte, als aus einem andern, <lb/>da doch die Luft dem Durchgange der elektriſchen Materie <lb/>aller Wahrſcheinlichkeit nach überall gleichförmig wider-<lb/>ſteht, und alſo dieſe Materie aus der Luft gegen die Spitze <lb/>nicht anders als langſam, unmerklich und auf allen Sei-<lb/>ten gleichförmig hinzudringen kan, bis ſie ihr ſo nahe <lb/>kömmt, daß ſie ſich einen Weg durch den Zwiſchenraum <lb/>durchbrechen, und an die Spitze ſelbſt kommen kan, wo <lb/>ſie ſich als ein leuchtendes Kügelchen zeiget.</s>
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2065 <s xml:id="echoid-s1061" xml:space="preserve"/>
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2066 </p>
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2067 </div>
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2068 <div xml:id="echoid-div95" type="section" level="1" n="91">
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2069 <head xml:id="echoid-head100" xml:space="preserve">73. Verſuch.</head>
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2070 <p>
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2071 <s xml:id="echoid-s1062" xml:space="preserve">Man bringe eine geriebene Glasröhre nahe an eine <lb/>am Ende eines poſitiv elektriſirten Conductors befeſtigte <lb/>Spitze, ſo wird der leuchtende Büſchel durch die Wirkung <lb/>@er geriebenen Röhre gebogen und aus dem Wege gelen-
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2072 <pb o="63" file="0083" n="83" rhead="Wirkungen der Spitzen."/>
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2073 ket werden. </s>
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2074 <s xml:id="echoid-s1063" xml:space="preserve">Hält man die Röhre der Spitze gerade ent <lb/>gegen, ſo verſchwindet der Vüſchel.</s>
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2075 <s xml:id="echoid-s1064" xml:space="preserve"/>
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2076 </p>
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2077 </div>
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2078 <div xml:id="echoid-div96" type="section" level="1" n="92">
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2079 <head xml:id="echoid-head101" xml:space="preserve">74. Verſuch.</head>
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2080 <p>
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2081 <s xml:id="echoid-s1065" xml:space="preserve">Man befeſtige die Spitze an das Ende eines negati-<lb/>ven Conductors, ſo wird ſich der leuchtende Stern gegen <lb/>die geriebene Glasröhre zu kehren.</s>
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2082 <s xml:id="echoid-s1066" xml:space="preserve"/>
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2083 </p>
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2084 <p>
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2085 <s xml:id="echoid-s1067" xml:space="preserve">Dieſe beyden Verſuche kommen mit dem 69 – 72 ſten <lb/>überein, und führen auf eben dieſelbe Schlußfolge, daß <lb/>nämlich der Stralenbüſchel ein Zeichen der poſitiven, und <lb/>der Stern ein Zeichen der negativen Elektricität ſey, wel-<lb/>ches folgende Verſuche noch mehr beſtätigen.</s>
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2086 <s xml:id="echoid-s1068" xml:space="preserve"/>
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2087 </p>
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2088 </div>
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2089 <div xml:id="echoid-div97" type="section" level="1" n="93">
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2090 <head xml:id="echoid-head102" xml:space="preserve">75. Verſuch.</head>
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2091 <p>
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2092 <s xml:id="echoid-s1069" xml:space="preserve">Man ſtecke einen Drath, an deſſen Ende ſich eine <lb/>Kugel befindet, in die Oeſnung am Ende eines poſit@ven <lb/>Conductors, ſtelle ein angezündetes Licht ſo, daß die Mitte <lb/>der Flamme der Mitte der Kugel gerade gegen über kömmt, <lb/>und etwa einen Zoll weit davon abſteht, und drehe die <lb/>Maſchine, ſo wird die Flamme von der Kugel hinwegge-<lb/>trieben. </s>
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2093 <s xml:id="echoid-s1070" xml:space="preserve">Man ſtecke eben dieſen Drath an das Ende des <lb/>negativen Conductors, ſo wird ſich die Erſcheinung um-<lb/>kehren, die Lichtflamme wird gegen die Kugel getrieben, <lb/>und die letztere dadurch in kurzer Zeit erhitzt werden.</s>
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2094 <s xml:id="echoid-s1071" xml:space="preserve"/>
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2095 </p>
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2096 </div>
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2097 <div xml:id="echoid-div98" type="section" level="1" n="94">
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2098 <head xml:id="echoid-head103" xml:space="preserve">76. Verſuch.</head>
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2099 <p>
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2100 <s xml:id="echoid-s1072" xml:space="preserve">Man befeſtige einen zugeſpitzten Drath in der Oef-<lb/>nung der obern Seite des Conductors, und ſtelle auf die <lb/>Spitze den Mit@elpunkt des meſſingenen Kreuzes k, Fig. <lb/></s>
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2101 <s xml:id="echoid-s1073" xml:space="preserve">34, deſſen Enden alle nach einerley Richtung umgebogen <lb/>ſind; </s>
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2102 <s xml:id="echoid-s1074" xml:space="preserve">man elektriſire den Conductor, ſo wird ſich das Kreuz <lb/>ſehr ſchnell um den Mittelpunkt drehen. </s>
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2103 <s xml:id="echoid-s1075" xml:space="preserve">Iſt das Zimmer <lb/>dunkel, ſo wird die elektriſche Materie an den umlaufen-<lb/>den Spitzen der Dräthe einen hellen Cirkel bilden. </s>
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2104 <s xml:id="echoid-s1076" xml:space="preserve">Es iſt <lb/>der Widerſtand der Luft gegen die divergirenden Büſchel
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2105 <pb o="64" file="0084" n="84" rhead="Sechſtes Capitel."/>
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2106 der elektriſchen Materie, welcher den Spitzen der Dräthe <lb/>eine rückgängige Bewegung giebt.</s>
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2107 <s xml:id="echoid-s1077" xml:space="preserve"/>
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2108 </p>
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2109 <p>
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2110 <s xml:id="echoid-s1078" xml:space="preserve">Das Kreuz dreht ſich immer nach eben derſelben <lb/>Richtung, es mag nun poſitiv oder negativ elektriſirt ſeyn; <lb/></s>
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2111 <s xml:id="echoid-s1079" xml:space="preserve">im luftleeren Raume aber bewegt es ſich gar nicht, wo-<lb/>fern man nicht den Finger oder einen andern Leiter an die <lb/>Glocke, einer der Spitzen gegen über, hält, in welchem <lb/>Falle es anfängt ſich zu bewegen, und mit großer Ge-<lb/>ſchwindigkeit ſo lange fortfährt bis das Glas geladen iſt.</s>
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2112 <s xml:id="echoid-s1080" xml:space="preserve"/>
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2113 </p>
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2114 </div>
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2115 <div xml:id="echoid-div99" type="section" level="1" n="95">
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2116 <head xml:id="echoid-head104" xml:space="preserve">77. Verſuch.</head>
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2117 <p>
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2118 <s xml:id="echoid-s1081" xml:space="preserve">Man elektriſire die beyden iſolirten Dräthe M N, <lb/>o P, Fig. </s>
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2119 <s xml:id="echoid-s1082" xml:space="preserve">35, ſo wird der Widerſtand der Luft gegen den <lb/>elektriſchen Strom aus den Spitzen des Flugrads L (deſ-<lb/>ſen Are auf Rollen auf den Dräthen läuft) das Flugrad <lb/>auf der ſchiefen Fläche M N o P aufwärts treiben.</s>
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2120 <s xml:id="echoid-s1083" xml:space="preserve"/>
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2121 </p>
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2122 </div>
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2123 <div xml:id="echoid-div100" type="section" level="1" n="96">
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2124 <head xml:id="echoid-head105" xml:space="preserve">78. Verſuch.</head>
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2125 <p>
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2126 <s xml:id="echoid-s1084" xml:space="preserve">Fig. </s>
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2127 <s xml:id="echoid-s1085" xml:space="preserve">36 ſtellt einen kleinen Krahn vor, der aus gle@-<lb/>cher Urſache mit dem vorherbeſchriebenen Rade umläuft, <lb/>und ein kleines Gewicht in die Höhe hebt.</s>
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2128 <s xml:id="echoid-s1086" xml:space="preserve"/>
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2129 </p>
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2130 </div>
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2131 <div xml:id="echoid-div101" type="section" level="1" n="97">
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2132 <head xml:id="echoid-head106" xml:space="preserve">79. Verſuch.</head>
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2133 <p>
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2134 <s xml:id="echoid-s1087" xml:space="preserve">Man kan, wie bey Fig. </s>
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2135 <s xml:id="echoid-s1088" xml:space="preserve">37 mehrere Flugräder zu-<lb/>gleich umlaufen laſſen, und nach dieſer Anleitung man-<lb/>cherley angenehme Verſuche veranſtalten.</s>
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2136 <s xml:id="echoid-s1089" xml:space="preserve"/>
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2137 </p>
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2138 <p>
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2139 <s xml:id="echoid-s1090" xml:space="preserve">Wenn die elektriſche Materie aus einer hölzernen <lb/>Spitze ausſtrömt, ſo ſcheint der Strom oder Büſchel <lb/>dünner, und in gewiſſer Maaße dem purpurfarbnen elek-<lb/>triſchen Lichte im leeren Raume ähnlich. </s>
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2140 <s xml:id="echoid-s1091" xml:space="preserve">Die Wirkung <lb/>der elektriſchen Materie auf die Luft, an einer elektriſirten <lb/>Spitze, bringt einen merklichen Wind oder ein Blaſen her-<lb/>vor, welches, wie man oben geſehen hat, ſtark genug iſt, <lb/>um leichte Körper zu bewegen, eine Lichtflamme zu ſtören, <lb/>oder flüſſige Materien in eine wellenförmige Bewegung zu
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2141 <pb o="65" file="0085" n="85" rhead="Wirkungen der Spitzen."/>
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2142 ſetzen. </s>
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2143 <s xml:id="echoid-s1092" xml:space="preserve">Die Wirkung der elektriſchen Materie wird durch <lb/>Spitzen ſo gemäßiget, daß ſie eine angenehme Empfin-<lb/>dung, gleich einem gelinden Anhauchen, hervorbringt; <lb/></s>
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2144 <s xml:id="echoid-s1093" xml:space="preserve">dieſe Empfindung kan mehr oder weniger reizend ſeyn, je <lb/>nachdem die Materie@bey ihrer Wirkung auf den menſch-<lb/>lichen Körper mehr oder weniger Widerſtand antrift, wor-<lb/>aus man bey der mediciniſchen Elektricität große Vortheile <lb/>ziehet.</s>
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2145 <s xml:id="echoid-s1094" xml:space="preserve"/>
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2146 </p>
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2147 </div>
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2148 <div xml:id="echoid-div102" type="section" level="1" n="98">
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2149 <head xml:id="echoid-head107" xml:space="preserve">Siebentes Capitel.</head>
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2150 <head xml:id="echoid-head108" xml:space="preserve">Von der leidner Flaſche.</head>
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2151 <p>
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2152 <s xml:id="echoid-s1095" xml:space="preserve">Die Verſuche mit der Leidner Flaſche gehören unter die <lb/>wichtigſten in der Lehre von der Elektricität; </s>
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2153 <s xml:id="echoid-s1096" xml:space="preserve">ſie <lb/>haben mehr, als alle andere, die Aufmerkſamkeit der <lb/>Naturforſcher auf dieſen Gegenſtand gelenkt, und ſind <lb/>jederzeit mit Bewunderung und Erſtaunen betrachtet <lb/>worden.</s>
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2154 <s xml:id="echoid-s1097" xml:space="preserve"/>
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2155 </p>
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2156 <p>
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2157 <s xml:id="echoid-s1098" xml:space="preserve">Die Erſcheinungen dieſer höchſt auſſerordentlichen <lb/>Verſuche ſchienen ganz unerklärbar, bis die ſinnreiche <lb/>Theorie des D. </s>
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2158 <s xml:id="echoid-s1099" xml:space="preserve">Franklin einiges Licht darüber zu ver-<lb/>breiten anfieng. </s>
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2159 <s xml:id="echoid-s1100" xml:space="preserve">Dieſe Theorie erklärt die meiſten Schwie-<lb/>rigkeiten in dieſem verwickelten Fache der Elektricität auf <lb/>eine einfache und deutliche Art, und läßt ſich ſo leicht und ſo <lb/>befriedigend auf eine Menge von Erſcheinungen anwenden, <lb/>daß wir darüber die Einwendungen gegen dieſ@lbe faſt ganz <lb/>aus dem Geſichte verlieren.</s>
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2160 <s xml:id="echoid-s1101" xml:space="preserve"/>
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2161 </p>
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2162 </div>
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2163 <div xml:id="echoid-div103" type="section" level="1" n="99">
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2164 <head xml:id="echoid-head109" xml:space="preserve">80. Verſuch.</head>
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2165 <p>
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2166 <s xml:id="echoid-s1102" xml:space="preserve">Man bringe die meſſingene Kugel einer belegten <lb/>Flaſche in Berührung mit dem erſten Leiter, indem die <lb/>äußere Seite der Flaſche mit dem Tiſche verbunden iſt.</s>
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2167 <s xml:id="echoid-s1103" xml:space="preserve">
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2168 <pb o="66" file="0086" n="86" rhead="Siebentes Capitel."/>
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2169 Dreht man nun den Cylinder, ſo wird die Flaſche in kur-<lb/>zer Zeit geladen, d. </s>
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2170 <s xml:id="echoid-s1104" xml:space="preserve">i. </s>
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2171 <s xml:id="echoid-s1105" xml:space="preserve">die elektriſche Materie wird darinn <lb/>auf eine beſondere Art modificiret. </s>
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2172 <s xml:id="echoid-s1106" xml:space="preserve">Um die Flaſche zu <lb/>entladen, oder wiederum in ihren natürlichen Zuſtand zu <lb/>ſetzen, bringe man das eine Ende eines leitenden Körpers <lb/>in Berührung mit der äuſſern Belegung, und nähere das <lb/>andere Ende dem Knopfe der Flaſche, welcher mit der in-<lb/>nern Belegung in Verbindung ſteht, ſo wird eine ſtarke <lb/>Exploſion mit einem hellen elektriſchen Funken und einem <lb/>beträchtlichen Schalle entſtehen.</s>
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2173 <s xml:id="echoid-s1107" xml:space="preserve"/>
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2174 </p>
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2175 </div>
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2176 <div xml:id="echoid-div104" type="section" level="1" n="100">
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2177 <head xml:id="echoid-head110" xml:space="preserve">81. Verſuch.</head>
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2178 <p>
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2179 <s xml:id="echoid-s1108" xml:space="preserve">Man lade die Leidner Flaſche, berühre die äußere <lb/>Belegung mit einer, und den Knopf mit der andern Hand, <lb/>ſo wird die Flaſche entladen werden, und man wird eine <lb/>plötzliche und ſonderbare Empfindung fühlen. </s>
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2180 <s xml:id="echoid-s1109" xml:space="preserve">Dies heiſt <lb/>der elektriſche Schlag, und trift, wenn es auf die <lb/>beſchriebene Art angeſtellt wird, gemeiniglich die Gelenke <lb/>der Hand und des Arms nebſt der Bruſt; </s>
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2181 <s xml:id="echoid-s1110" xml:space="preserve">iſt aber der <lb/>Schlag ſtark, ſo trift er den ganzen Körper. </s>
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2182 <s xml:id="echoid-s1111" xml:space="preserve">Wahr-<lb/>ſcheinlich rührt dieſe beſondere Empfindung von der plötzli-<lb/>chen doppelten Wirkung der elektriſchen Materie her, wel-<lb/>che in den Körper und in die verſchiedenen dabey betroffe-<lb/>nen Theile deſſelben zu gleicher Zeit ein- und ausgehet. <lb/></s>
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2183 <s xml:id="echoid-s1112" xml:space="preserve">Man hat auch bemerkt, daß die Natur in allen Körpern <lb/>auf der Erde ein gewiſſes Gleichgewicht der elektriſchen <lb/>Materie feſtgeſetzt hat, welches wir bey unſern Verſuchen <lb/>ſtören. </s>
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2184 <s xml:id="echoid-s1113" xml:space="preserve">Iſt dieſe Störung gering, ſo wirken die Kräfte <lb/>der Natur nur ganz gelind, um die veranlaſſete Unord-<lb/>nung aufzuheben; </s>
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2185 <s xml:id="echoid-s1114" xml:space="preserve">iſt hingegen die Abweichung beträcht-<lb/>lich, ſo ſtellt die Natur das urſprüngliche Gleichgewicht <lb/>mit der äuſſerſten Gewalt wieder her.</s>
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2186 <s xml:id="echoid-s1115" xml:space="preserve"/>
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2187 </p>
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2188 <p>
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2189 <s xml:id="echoid-s1116" xml:space="preserve">Geben mehrere Perſonen einander die Hände, und <lb/>berührt die erſte die äuſſere Seite der Flaſche, die letzte <lb/>aber den Knopf, ſo wird die Flaſche entladen, und alle <lb/>fühlen den Schlag in einem Augenblicke; </s>
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2190 <s xml:id="echoid-s1117" xml:space="preserve">je größer aber
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2191 <pb o="67" file="0087" n="87" rhead="Die leidner Flaſche."/>
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2192 die Anzahl der Perſonen iſt, welche ſich die Hände geben, <lb/>deſto ſchwächer iſt der Schlag.</s>
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2193 <s xml:id="echoid-s1118" xml:space="preserve"/>
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2194 </p>
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2195 <p>
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2196 <s xml:id="echoid-s1119" xml:space="preserve">Die Stärke des Schlags kömmt auf die Quantität <lb/>von belegter Fläche, auf die Dünne des Glaſes und auf das <lb/>Vermögen der Maſchine an; </s>
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2197 <s xml:id="echoid-s1120" xml:space="preserve">oder die Wirkung der leid-<lb/>ner Flaſche wird in eben dem Verhältniſſe ſtärker, in wel-<lb/>chem das Gleichgewicht der Oberf@ächen geſtöret wird.</s>
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2198 <s xml:id="echoid-s1121" xml:space="preserve"/>
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2199 </p>
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2200 <p>
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2201 <s xml:id="echoid-s1122" xml:space="preserve">Iſt eine geladene Flaſche allzuhoch belegt, ſo entla-<lb/>det ſie ſich ſelbſt, noch ehe ſie die Ladung erhält, welche <lb/>ſie hätte ertragen können, wenn die Belegung niedriger <lb/>geweſen wäre. </s>
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2202 <s xml:id="echoid-s1123" xml:space="preserve">Iſt die Belegung ſehr niedrig, ſo kan <lb/>zwar der belegte Theil der Oberfläche ſehr ſtark geladen <lb/>werden, aber ein beträchtlicher Theil des Glaſes wird gar <lb/>nicht geladen.</s>
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2203 <s xml:id="echoid-s1124" xml:space="preserve"/>
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2204 </p>
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2205 <p>
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2206 <s xml:id="echoid-s1125" xml:space="preserve">Iſt eine Flaſche ſehr ſtark geladen, ſo entladet ſie <lb/>ſich oft von ſelbſt über das Glas hinweg, von einer beleg-<lb/>ten Oberfläche bis zur andern, oder bricht, wenn das <lb/>Glas dünn iſt, ein Loch hindurch, treibt die Belegung an <lb/>beyden Seiten in die Höhe, zerſchmettert das Glas in <lb/>dem Loche zu Pulver, und macht ſehr oft eine Menge <lb/>Riſſe, welche in verſchiedenen Richtungen von dem Loche <lb/>ausgehen.</s>
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2207 <s xml:id="echoid-s1126" xml:space="preserve"/>
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2208 </p>
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2209 <p>
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2210 <s xml:id="echoid-s1127" xml:space="preserve">Oft erhält eine leidner Flaſche nach der Entladung <lb/>einen geringen Theil ihrer Elektricität wieder; </s>
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2211 <s xml:id="echoid-s1128" xml:space="preserve">dieſer zwey-<lb/>te Schlag wird der Ueberreſ@ der Ladung genannt.</s>
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2212 <s xml:id="echoid-s1129" xml:space="preserve"/>
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2213 </p>
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2214 <p>
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2215 <s xml:id="echoid-s1130" xml:space="preserve">Die Geſtalt oder Größe des Glaſes hat keinen Ein-<lb/>fluß auf die Entſtehung des Schlags.</s>
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2216 <s xml:id="echoid-s1131" xml:space="preserve"/>
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2217 </p>
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2218 <p>
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2219 <s xml:id="echoid-s1132" xml:space="preserve">Will man keinen Schlag erhalten, ſo muß man ſich <lb/>ſorgfältig hüten, weder den Knopf und die Auſſenſeite der <lb/>Flaſche zu gleicher Zeit zu berühren, noch auch in irgend <lb/>eine zwiſchen der äuſſern und innern Seite der Flaſche ge-<lb/>machte Verbindung zu kommen. </s>
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2220 <s xml:id="echoid-s1133" xml:space="preserve">Beobachtet man dies, <lb/>ſo kan man Flaſchen von jeder Größe ſehr ſicher behan-<lb/>deln. </s>
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2221 <s xml:id="echoid-s1134" xml:space="preserve">Zwar thut auch der menſchliche Körper dem freye<unsure/>n <lb/>Durchgange der feinen elektriſchen Materie ſo wenig Wi-<lb/>verſtand, daß man von einem Schlage aus einer gewöhn-
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2222 <pb o="68" file="0088" n="88" rhead="Siebentes Capitel."/>
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2223 lichen Flaſche keinen weitern Schaden, als eine vorüber-<lb/>gehende unangenehme Empſindung, erhält.</s>
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2224 <s xml:id="echoid-s1135" xml:space="preserve"/>
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2225 </p>
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2226 <p>
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2227 <s xml:id="echoid-s1136" xml:space="preserve">Man berühre den Knopf einer geladenen Flaſche, ſo <lb/>erfolgt kein Schlag; </s>
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2228 <s xml:id="echoid-s1137" xml:space="preserve">aber der Finger oder der berührende <lb/>Theil fühlt eine ſ@echende Empfindung, als wenn er von <lb/>einer Nadelſpitze berührt würde.</s>
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2229 <s xml:id="echoid-s1138" xml:space="preserve"/>
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2230 </p>
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2231 <p>
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2232 <s xml:id="echoid-s1139" xml:space="preserve">Man kan eine geladene Flaſche, wenn ſie auf idio-<lb/>elektriſchen Subſtanzen ſteht, ohne Gefahr bey der Be-<lb/>legung oder an dem Drathe anfaſſen und aufheben; </s>
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2233 <s xml:id="echoid-s1140" xml:space="preserve">nur <lb/>erhält man einen ſehr kleinen Funken daraus.</s>
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2234 <s xml:id="echoid-s1141" xml:space="preserve"/>
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2235 </p>
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2236 </div>
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2237 <div xml:id="echoid-div105" type="section" level="1" n="101">
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2238 <head xml:id="echoid-head111" xml:space="preserve">D. Franklin’s Theorie der leidner <lb/>Flaſche.</head>
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2239 <p>
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2240 <s xml:id="echoid-s1142" xml:space="preserve">Man nimmt an, das Glas enthalte zu jeder Zeit an <lb/>ſeinen beyden Oberflächen eine beträchtliche Menge elek-<lb/>triſcher Materie, und dieſe ſey ſo eingetheilet, daß, wenn <lb/>die eine Seite poſitiv iſt, die andere negativ ſeyn muß. <lb/></s>
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2241 <s xml:id="echoid-s1143" xml:space="preserve">Da nun in die eine Seite nicht mehr elektriſche Materie <lb/>hineingedrängt werden kan, als aus der andern heraus-<lb/>geht, ſo iſt nach geſchehener Ladung nicht mehr in der <lb/>Flaſche, als vorher; </s>
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2242 <s xml:id="echoid-s1144" xml:space="preserve">die Menge der elektriſchen Materie <lb/>wird im Ganzen weder vermehrt noch verringert, ſie ver-<lb/>ändert nur ihren Ort und ihre Stellung; </s>
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2243 <s xml:id="echoid-s1145" xml:space="preserve">d. </s>
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2244 <s xml:id="echoid-s1146" xml:space="preserve">i. </s>
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2245 <s xml:id="echoid-s1147" xml:space="preserve">man kan <lb/>nur alsdann einen Zuſatz in die eine Seite bringen, wenn <lb/>zugleich eine eben ſo große Menge aus der andern Seite <lb/>herausgehen kan. </s>
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2246 <s xml:id="echoid-s1148" xml:space="preserve">Dieſe Veränderung wird dadurch be-<lb/>wirkt, daß man beyde Flächen des Glaſes zum Theil mit <lb/>einer leitenden Subſtanz belegt. </s>
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2247 <s xml:id="echoid-s1149" xml:space="preserve">Durch dieſes Mittel <lb/>wird die elektriſche Materie auf jeden phyſikaliſchen Punkt <lb/>der zu ladenden Oberfläche geführt, wo ſie ihre Wirkung <lb/>dadurch äuſſert, daß ſ@e die von Natur in der andern Seite <lb/>befindlichen elektriſchen Theile austreibt, welche durch die <lb/>mit der Fläche in Berührung ſtehende Belegung ſehr gut <lb/>ausweichen können, daher dieſe Belegung mit der Erde <lb/>verbunden werden muß. </s>
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2248 <s xml:id="echoid-s1150" xml:space="preserve">Wenn nun aus der einen Fläche
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2249 <pb o="69" file="0089" n="89" rhead="Die leidner Flaſche."/>
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2250 die ganze elektriſche Materie herausgegangen, in die an-<lb/>dere aber eben ſo viel hineingekommen iſt, ſo iſt die Fla-<lb/>ſche ſo ſtark, als möglich, geladen. </s>
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2251 <s xml:id="echoid-s1151" xml:space="preserve">Beyde Flächen ſind <lb/>alsdann in einem gewaltſamen Zuſtande; </s>
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2252 <s xml:id="echoid-s1152" xml:space="preserve">die innere oder <lb/>poſitive Seite iſt ſtark geneigt, ihren Ueberſchuß von elek@ <lb/>triſcher Materie abzugeben; </s>
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2253 <s xml:id="echoid-s1153" xml:space="preserve">die äußere oder negative <lb/>Seite hingegen ſtrebt eben ſo ſtark, dasjenige wieder an <lb/>ſich zu nehmen, was ſie verlohren hat; </s>
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2254 <s xml:id="echoid-s1154" xml:space="preserve">keine von beyden <lb/>aber kan ihren Zuſtand verändern, ohne eine gleichgroße <lb/>und gleichzeitige Theilnehmung der andern. </s>
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2255 <s xml:id="echoid-s1155" xml:space="preserve">Man nimmt <lb/>ferner an, daß ohngeachtet der geringen Entfernung bey-<lb/>der Flächen, und des ſtarken Beſtrebens der elektriſchen <lb/>Materie, auf der einen Seite den Ueberfluß abzuge@en, <lb/>und auf der andern das ermangelnde wieder anzunehmen, <lb/>ſich dennoch zwiſchen beyden ein undurchdringliches Hin-<lb/>derniß befinde; </s>
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2256 <s xml:id="echoid-s1156" xml:space="preserve">weil nämlich das Glas für die elektriſche <lb/>Materie undurchdringlich iſt (ob es gleich nicht hindert, <lb/>daß eine Seite auf die andere wirken kan), und alſo bey-<lb/>de Flächen ſo lange in dieſem entgegengeſetzten Zuſtande <lb/>bleiben, bis man durch einen oder mehrere Leiter zwiſchen <lb/>beyden eine Verbindung von auſſen macht, da ſich als-<lb/>dann das Gleichgewicht plötzlich und gewaltſam wieder-<lb/>herſtellet, und die elektriſche Materie auf beyden Seiten <lb/>des Glaſes zu ihrer urſprünglichen Gleichheit zurückkehrt.</s>
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2257 <s xml:id="echoid-s1157" xml:space="preserve"/>
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2258 </p>
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2259 </div>
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2260 <div xml:id="echoid-div106" type="section" level="1" n="102">
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2261 <head xml:id="echoid-head112" xml:space="preserve">Verſuche über die Ladung und Entladung der leid-<lb/>ner Flaſche, zu Erläuterung und Beſtätigung <lb/>der Theorie des Dr. Franklin.</head>
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2262 <head xml:id="echoid-head113" xml:space="preserve">82. Verſuch.</head>
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2263 <p>
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2264 <s xml:id="echoid-s1158" xml:space="preserve">Man ſchraube eine leidner Flaſche, deren Belegung <lb/>ganz frey von Spitzen iſt, auſ ein iſolirtes Geſtell, und <lb/>ſetze ſie ſo, daß ihr Knopf den Conductor berührt (wob<unsure/>ey <lb/>man auch verhüten muß, daß ſich keine leitende Subſtanz <lb/>in der Nähe der Belegung befinde); </s>
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2265 <s xml:id="echoid-s1159" xml:space="preserve">man drehe nun den
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2266 <pb o="70" file="0090" n="90" rhead="Siebentes Capitel."/>
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2267 Cylinder ſo vielmal herum, als ſonſt nöthig iſt, um die <lb/>Flaſche zu laden, und unterſuche ſie dann mit einem Aus-<lb/>lader, ſo wird man finden, daß ſie keine Ladung erhalten <lb/>habe; </s>
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2268 <s xml:id="echoid-s1160" xml:space="preserve">woraus ſich deutlich zeigt, daß die eine Seite der <lb/>Flaſche keine elektriſche Materie annehmen könne, wenn <lb/>dieſe Materie nicht aus der andern Seite herausgehen kan.</s>
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2269 <s xml:id="echoid-s1161" xml:space="preserve"/>
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2270 </p>
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2271 </div>
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2272 <div xml:id="echoid-div107" type="section" level="1" n="103">
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2273 <head xml:id="echoid-head114" xml:space="preserve">83. Verſuch.</head>
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2274 <p>
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2275 <s xml:id="echoid-s1162" xml:space="preserve">Man ſtelle eben dieſe iſolirte Flaſche ſo, daß ihr <lb/>Knopf ohngefähr einen halben Zoll vom Conductor ab-<lb/>ſteht, und halte während der Umdrehung des Cylinders <lb/>eine meſſingene Kugel nahe an die Belegung der Flaſche, <lb/>ſo wird bey jedem Funken, der aus dem Conductor in <lb/>den Knopf übergeht, ein anderer Funken zwiſchen der Be-<lb/>legung und der Kugel entſtehen, und die Flaſche wird in <lb/>kurzer Zeit geladen ſeyn, indem die Elektricität in die eine <lb/>Seite hinein, und aus der andern herausgeht.</s>
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2276 <s xml:id="echoid-s1163" xml:space="preserve"/>
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2277 </p>
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2278 </div>
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2279 <div xml:id="echoid-div108" type="section" level="1" n="104">
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2280 <head xml:id="echoid-head115" xml:space="preserve">84. Verſuch.</head>
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2281 <p>
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2282 <s xml:id="echoid-s1164" xml:space="preserve">Man ſchraube die Flaſche a, Fig. </s>
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2283 <s xml:id="echoid-s1165" xml:space="preserve">42, auf den iſo-<lb/>lirten Fuß d, und bringe ihren Knopf in Berührung mit <lb/>dem Conductor; </s>
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2284 <s xml:id="echoid-s1166" xml:space="preserve">halte dann eine andere Flaſche c von glei-<lb/>cher Größe mit a ſo, daß ihr Knopf die äußere Belegung <lb/>der Flaſche a berührt, drehe den Cylinder, und ſtelle, <lb/>wenn die Flaſche a geladen iſt, c auf den Tiſch, ſchraube <lb/>a von dem Fuße ab, und ſtelle ſie ebenfalls auf den Tiſch <lb/>in einiger Entfernung von c. </s>
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2285 <s xml:id="echoid-s1167" xml:space="preserve">Man ſtecke eine meſſingene <lb/>Kugel an den Stiel eines Quadrantenelektrometers, und <lb/>halte es mit einer ſeidnen Schnur ſo, daß die meſſingene <lb/>Kugel den Knopf der Flaſche berührt. </s>
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2286 <s xml:id="echoid-s1168" xml:space="preserve">Man bemerke in <lb/>dieſer Stellung den Stand des Zeigers am Elektrometer, <lb/>und bringe daſſelbe nunmehr an die andere Flaſche, wo <lb/>der Zeiger auf eben dem Grade ſtehen wird. </s>
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2287 <s xml:id="echoid-s1169" xml:space="preserve">Hieraus er-<lb/>hellet ſehr deutlich, daß die Flaſche aus ihrer äußern Seite
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2288 <pb o="71" file="0091" n="91" rhead="Die leidner Flaſche."/>
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2289 eben ſoviel Elektricität ausgeſtoßen habe, als ſie mit der <lb/>innern aufgenommen hat.</s>
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2290 <s xml:id="echoid-s1170" xml:space="preserve"/>
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2291 </p>
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2292 </div>
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2293 <div xml:id="echoid-div109" type="section" level="1" n="105">
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2294 <head xml:id="echoid-head116" xml:space="preserve">85. Verſuch.</head>
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2295 <p>
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2296 <s xml:id="echoid-s1171" xml:space="preserve">Man bringe den Knopf einer iſolirten Flaſche in <lb/>Berührung mit einem poſitiven Conductor, verbinde die <lb/>äußere Belegung mit dem Küſſen oder mit einem negati-<lb/>ven Conductor, und drehe den Cylinder, ſo wird die Fla-<lb/>ſche mit ihrer eignen Elektricität geladen, und die elektri-<lb/>ſche Materie wird aus der äußern Belegung in die innere <lb/>übergeführt.</s>
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2297 <s xml:id="echoid-s1172" xml:space="preserve"/>
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2298 </p>
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2299 </div>
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2300 <div xml:id="echoid-div110" type="section" level="1" n="106">
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2301 <head xml:id="echoid-head117" xml:space="preserve">86. Verſuch.</head>
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2302 <p>
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2303 <s xml:id="echoid-s1173" xml:space="preserve">Man lade die beyden Flaſchen, Fig. </s>
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2304 <s xml:id="echoid-s1174" xml:space="preserve">43, poſitiv; <lb/></s>
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2305 <s xml:id="echoid-s1175" xml:space="preserve">verbinde ihre äußern Belegungen durch einen Drath oder <lb/>eine Kette, und bringe ihre Knöpfe an einander, ſo wird <lb/>kein Funken dazwiſchen entſtehen, und die Flaſchen wer-<lb/>den nicht entladen werden, weil keine Seite der andern <lb/>etwas abzugeben hat.</s>
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2306 <s xml:id="echoid-s1176" xml:space="preserve"/>
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2307 </p>
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2308 </div>
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2309 <div xml:id="echoid-div111" type="section" level="1" n="107">
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2310 <head xml:id="echoid-head118" xml:space="preserve">87. Verſuch.</head>
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2311 <p>
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2312 <s xml:id="echoid-s1177" xml:space="preserve">Man lade die iſolirte Flaſche, Fig. </s>
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2313 <s xml:id="echoid-s1178" xml:space="preserve">43, negativ, <lb/>und die andere poſitiv, verbinde die Belegungen mit einer <lb/>Kette, und bringe die Knöpfe zuſammen, ſo wird ein <lb/>Schlag entſtehen, und die Flaſchen werden entladen wer-<lb/>den. </s>
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2314 <s xml:id="echoid-s1179" xml:space="preserve">Stellt man ein brennendes licht zwiſche beyde Knö-<lb/>pfe, ſo wird der Schlag auf eine ſehr angenehme Art, und <lb/>auf eine Entfernung von einigen Zollen durch die Flamme <lb/>gehen. </s>
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2315 <s xml:id="echoid-s1180" xml:space="preserve">Man ſ. </s>
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2316 <s xml:id="echoid-s1181" xml:space="preserve">Fig. </s>
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2317 <s xml:id="echoid-s1182" xml:space="preserve">44.</s>
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2318 <s xml:id="echoid-s1183" xml:space="preserve"/>
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2319 </p>
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2320 </div>
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2321 <div xml:id="echoid-div112" type="section" level="1" n="108">
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2322 <head xml:id="echoid-head119" xml:space="preserve">88. Verſuch.</head>
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2323 <p>
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2324 <s xml:id="echoid-s1184" xml:space="preserve">Man befeſtige ein Quadrantenelektrometer auf den <lb/>Knopf einer Leidner Flaſche, und lade dieſelbe negativ; <lb/></s>
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2325 <s xml:id="echoid-s1185" xml:space="preserve">wenn ſie die völlige Ladung erhalten hat, ſo wird der Zei-<lb/>ger auf dem 90ſten Grade ſtehen. </s>
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2326 <s xml:id="echoid-s1186" xml:space="preserve">Man ſetze nun die <lb/>Flaſche mit dem Elektrometer an einen poſitiven Condu-
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2327 <pb o="72" file="0092" n="92" rhead="Siebentes Capitel."/>
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2328 ctor, und drehe den Cylinder, ſo wird der Zeiger wieder <lb/>fallen, und die Flaſche wird durch die entgegengeſetzte <lb/>Elektricität ihre Ladung verlieren.</s>
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2329 <s xml:id="echoid-s1187" xml:space="preserve"/>
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2330 </p>
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2331 </div>
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2332 <div xml:id="echoid-div113" type="section" level="1" n="109">
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2333 <head xml:id="echoid-head120" xml:space="preserve">89. Verſuch.</head>
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2334 <p>
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2335 <s xml:id="echoid-s1188" xml:space="preserve">Man iſolire zwo leidner Flaſchen, bringe ihre Ve-<lb/>legungen in Berührung, lade die innere Seite der einen <lb/>poſitiv, und laſſe währender Zeit eine auf dem Boden <lb/>ſtehende Perſon den Finger auf den Knopf der andern <lb/>Flaſche halten, ſo wird die letztere negativ geladen werden</s>
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2336 </p>
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2337 </div>
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2338 <div xml:id="echoid-div114" type="section" level="1" n="110">
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2339 <head xml:id="echoid-head121" xml:space="preserve">90. Verſuch.</head>
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2340 <p>
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2341 <s xml:id="echoid-s1189" xml:space="preserve">L M, Fig. </s>
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2342 <s xml:id="echoid-s1190" xml:space="preserve">45, iſt eine leidner Flaſche mit beweg-<lb/>lichen Stanniolbelegungen; </s>
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2343 <s xml:id="echoid-s1191" xml:space="preserve">die innere Belegung N kan <lb/>durch die ſeidnen Schnüre f, g, h, abgenommen wer-<lb/>den, aus der äußern Belegung kan man die Flaſche her-<lb/>ausheben.</s>
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2344 <s xml:id="echoid-s1192" xml:space="preserve"/>
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2345 </p>
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2346 <p>
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2347 <s xml:id="echoid-s1193" xml:space="preserve">Ladet man nun die Flaſche, nimmt die Belegungen <lb/>hinweg, und bringt ein paar Korkkugeln an das Glas, <lb/>ſo werden ſie von demſelben ſehr ſtark angezogen; </s>
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2348 <s xml:id="echoid-s1194" xml:space="preserve">legt man <lb/>die Belegungen wieder an, ſo giebt die Flaſche noch im-<lb/>mer einen beträchtlichen Schlag; </s>
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2349 <s xml:id="echoid-s1195" xml:space="preserve">woraus erhellet, daß <lb/>die Kraft im Glaſe, nicht in den Belegungen, hafte.</s>
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2350 <s xml:id="echoid-s1196" xml:space="preserve"/>
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2351 </p>
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2352 </div>
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2353 <div xml:id="echoid-div115" type="section" level="1" n="111">
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2354 <head xml:id="echoid-head122" xml:space="preserve">91. Verſuch.</head>
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2355 <p>
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2356 <s xml:id="echoid-s1197" xml:space="preserve">T V, Fig. </s>
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2357 <s xml:id="echoid-s1198" xml:space="preserve">46, iſt eine Flaſche, deren äußere Be-<lb/>legung aus kleinen, nicht weit aus einander ſtehenden, <lb/>Stücken Stanniol beſtehet. </s>
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2358 <s xml:id="echoid-s1199" xml:space="preserve">Ladet man dieſe Flaſche auf <lb/>die gewöhnliche Art, ſo werden ſtarke elektriſche Funken <lb/>nach mancherley Richtungen von einem Stück Stanniol <lb/>zum andern gehen; </s>
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2359 <s xml:id="echoid-s1200" xml:space="preserve">denn die Unterbrechung des Stanniols <lb/>macht den Uebergang der Materie von der äußern Seite <lb/>in den Tiſch merklich. </s>
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2360 <s xml:id="echoid-s1201" xml:space="preserve">Entladet man dieſe Flaſche durch <lb/>einen zugeſpitzten Drath, den man allmählig dem Knopfe <lb/>nähert, ſo werden die unbelegten Theile des Glaſes zwi-
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2361 <pb o="73" file="0093" n="93" rhead="Die leidner Flaſche."/>
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2362 ſchen dem Stanniol ſehr ſchön erleuchtet erſcheinen, und <lb/>man wird ein Geräuſch, wie von angezündeten kleinen <lb/>Schwärmern, hören. </s>
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2363 <s xml:id="echoid-s1202" xml:space="preserve">Entladet man die Flaſche plötzlich, <lb/>ſo erſcheint die ganze äußere Fläche erleuchtet. </s>
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2364 <s xml:id="echoid-s1203" xml:space="preserve">Zu dieſem <lb/>Verſuche muß das Glas ſehr trocken ſeyn.</s>
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2365 <s xml:id="echoid-s1204" xml:space="preserve"/>
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2366 </p>
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2367 </div>
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2368 <div xml:id="echoid-div116" type="section" level="1" n="112">
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2369 <head xml:id="echoid-head123" xml:space="preserve">92. Verſuch.</head>
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2370 <p>
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2371 <s xml:id="echoid-s1205" xml:space="preserve">Man reihe eine Anzahl Schrotkörner an einen ſeid-<lb/>nen Faden, und laſſe zwischen jeden zwey Körnern einen <lb/>kleinen Zwiſchenraum; </s>
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2372 <s xml:id="echoid-s1206" xml:space="preserve">hänge dieſe Schnur an den Con-<lb/>ductor ſo, daß ſie bis an den Boden einer belegten Flaſche <lb/>herabreicht, die auf einem iſolirten Fuße ſteht; </s>
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2373 <s xml:id="echoid-s1207" xml:space="preserve">eine an-<lb/>dere dergleichen Schnur von Schrotkörnern hänge man an <lb/>den Boden der Flaſche, verbinde ſie mit dem Tiſche, und <lb/>drehe die Maſchine, ſo wird ſich zwiſchen allen Schrotkör-<lb/>nern ein lebhafter Funken zeigen, ſowohl in als außer der <lb/>Flaſche, gerade als ob das Feuer durch das Glas hin-<lb/>durchgienge.</s>
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2374 <s xml:id="echoid-s1208" xml:space="preserve"/>
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2375 </p>
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2376 </div>
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2377 <div xml:id="echoid-div117" type="section" level="1" n="113">
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2378 <head xml:id="echoid-head124" xml:space="preserve">93. Verſuch.</head>
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2379 <p>
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2380 <s xml:id="echoid-s1209" xml:space="preserve">Man halte eine Flaſche, welche auswendig keine Be-<lb/>legung hat, in der Hand, und bringe ihren Knopf gegen <lb/>einen elektriſirten Conductor; </s>
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2381 <s xml:id="echoid-s1210" xml:space="preserve">ſo wird das Feuer, indem <lb/>die Flaſche geladen wird, auf eine ſehr angenehme Art aus <lb/>der äußern Seite in die Hand übergehen; </s>
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2382 <s xml:id="echoid-s1211" xml:space="preserve">beym Entla-<lb/>den werden von dem an der Auſſenſeite anliegenden Kno-<lb/>pfe des Ausladers die ſchönſten leuchtenden Aeſte ausge-<lb/>hen, und ſich über die ganze Flaſche verbreiten.</s>
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2383 <s xml:id="echoid-s1212" xml:space="preserve"/>
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2384 </p>
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2385 </div>
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2386 <div xml:id="echoid-div118" type="section" level="1" n="114">
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2387 <head xml:id="echoid-head125" xml:space="preserve">94. Verſuch.</head>
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2388 <p>
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2389 <s xml:id="echoid-s1213" xml:space="preserve">Man hänge eine Kette an den Conductor, und laſſe <lb/>ſie in eine unbelegte Flaſche ſo herabgehen, daß ſie den <lb/>Boden derſelben nicht berührt; </s>
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2390 <s xml:id="echoid-s1214" xml:space="preserve">dreht man nun die Ma-<lb/>ſchine, ſo wird ſich die Kette in die Runde herum bewe-<lb/>gen, gleichſam als ob ſie die elektriſche Materie über die
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2391 <pb o="74" file="0094" n="94" rhead="Siebentes Capitel."/>
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2392 innere Seite des Glaſes verbreiten, und ſo daſſelbe nach <lb/>und nach laden wollte.</s>
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2393 <s xml:id="echoid-s1215" xml:space="preserve"/>
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2394 </p>
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2395 </div>
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2396 <div xml:id="echoid-div119" type="section" level="1" n="115">
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2397 <head xml:id="echoid-head126" xml:space="preserve">95. Verſuch.</head>
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2398 <p>
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2399 <s xml:id="echoid-s1216" xml:space="preserve">Fig. </s>
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2400 <s xml:id="echoid-s1217" xml:space="preserve">47 zeigt zwo übereinander geſtellte leidner Fla-<lb/>ſchen. </s>
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2401 <s xml:id="echoid-s1218" xml:space="preserve">Man kan mit dieſer doppelten Flaſche viele Ver-<lb/>ſuche anſtellen, welche ſehr beluſtigend ſind, und die an-<lb/>genommene Theorie ungemein erläutern.</s>
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2402 <s xml:id="echoid-s1219" xml:space="preserve"/>
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2403 </p>
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2404 <p>
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2405 <s xml:id="echoid-s1220" xml:space="preserve">Man bringe die äußere Belegung der Flaſche A in <lb/>Berührung mit dem erſten Leiter, drehe die Maſchine, bis <lb/>die Flaſche geladen iſt, ſtelle den einen Knopf des Ausla-<lb/>ders auf die Belegung von B, und berühre mit dem an-<lb/>dern den Knopf der Flaſche A, ſo wird eine Exploſion <lb/>entſtehen. </s>
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2406 <s xml:id="echoid-s1221" xml:space="preserve">Nunmehr ſtelle man einen Knopf des Ausla-<lb/>ders auf den Knopf von A, und bringe den andern an die <lb/>Belegung von A, ſo wird ein zweyter Schlag erfolgen. <lb/></s>
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2407 <s xml:id="echoid-s1222" xml:space="preserve">Bringt man wiederum einen Knopf des Ausladers an die <lb/>Belegung von A, ſo entſteht eine dritte Erploſion. </s>
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2408 <s xml:id="echoid-s1223" xml:space="preserve">Man <lb/>erhält noch eine vierte, wenn man den Schlag aus der Be-<lb/>legung von A in den Knopf dieſer Flaſche gehen läßt.</s>
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2409 <s xml:id="echoid-s1224" xml:space="preserve"/>
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2410 </p>
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2411 <p>
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2412 <s xml:id="echoid-s1225" xml:space="preserve">Die äußere Belegung der obern Flaſche ſteht in Ver-<lb/>bindung mit der innern Seite der untern, und führt die <lb/>elektriſche Materie aus dem Conductor in die untere große <lb/>Flaſche, welche daher poſitiv geladen wird; </s>
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2413 <s xml:id="echoid-s1226" xml:space="preserve">die obere <lb/>wird nicht geladen, weil die innere Seite nichts von ihrer <lb/>elektriſchen Materie mittheilen kan. </s>
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2414 <s xml:id="echoid-s1227" xml:space="preserve">Macht man aber eine <lb/>Verbindung zwiſchen der innern Seite von A und der <lb/>äußern von B, ſo wird ein Theil der Materie aus der in-<lb/>nern Seite von A in die negative Belegung von B über-<lb/>geführt, und die Flaſche B entladen. </s>
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2415 <s xml:id="echoid-s1228" xml:space="preserve">Die zwote Erplo-<lb/>ſion entſteht durch die Entladung der Flaſche A; </s>
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2416 <s xml:id="echoid-s1229" xml:space="preserve">da aber <lb/>dieſer Flaſche äußere Seite durch leitende Subſtanzen mit <lb/>der poſitiven innern Seite der Flaſche B verbunden iſt, ſo <lb/>darf der Knopf des Ausladers nur noch die geringſte Zeit <lb/>über nach der Entladung am Knopfe von A verweilen, und <lb/>es wird ſogleich ein Theil von der Materie der innern Seite
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2417 <pb o="75" file="0095" n="95" rhead="Die leidner Flaſche."/>
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2418 von A herausgehen, und durch eine aus B kommende <lb/>Quantität an der äußern Seite erſetzt werden, wodurch <lb/>A zum zweytenmale geladen wird. </s>
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2419 <s xml:id="echoid-s1230" xml:space="preserve">Die Entladung von <lb/>A veranlaſſet den dritten, und die von B den vierten <lb/>Schlag.</s>
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2420 <s xml:id="echoid-s1231" xml:space="preserve"/>
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2421 </p>
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2422 </div>
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2423 <div xml:id="echoid-div120" type="section" level="1" n="116">
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2424 <head xml:id="echoid-head127" xml:space="preserve">Beweis, daß die beyden Seiten einer geladenen <lb/>Flaſche entgegengeſetzte Elektricitäten haben, <lb/>durch ihr Anziehen und Zurückſtoßen.</head>
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2425 <head xml:id="echoid-head128" xml:space="preserve">96. Verſuch.</head>
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2426 <p>
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2427 <s xml:id="echoid-s1232" xml:space="preserve">Man ſchraube die Flaſche H, Fig. </s>
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2428 <s xml:id="echoid-s1233" xml:space="preserve">49, mit dem <lb/>daran befindlichen Ringe ſeitwärts auf das iſolirende Sta-<lb/>tiv, wie in Fig. </s>
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2429 <s xml:id="echoid-s1234" xml:space="preserve">48, und lade ſie poſitiv, berühre hier-<lb/>auf den Knopf mit ein paar Korkkugeln, ſo werden dieſe <lb/>mit poſitiver Elektricität aus einander gehen. </s>
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2430 <s xml:id="echoid-s1235" xml:space="preserve">Man halte <lb/>ein paar andere an die Belegung, ſo werden ſie ſich mit <lb/>negativer Elektricität trennen.</s>
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2431 <s xml:id="echoid-s1236" xml:space="preserve"/>
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2432 </p>
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2433 </div>
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2434 <div xml:id="echoid-div121" type="section" level="1" n="117">
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2435 <head xml:id="echoid-head129" xml:space="preserve">97. Verſuch.</head>
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2436 <p>
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2437 <s xml:id="echoid-s1237" xml:space="preserve">Man elektriſire zwey paar Korkkugeln an meſſinge-<lb/>nen Röhren, wie Taf. </s>
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2438 <s xml:id="echoid-s1238" xml:space="preserve">11. </s>
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2439 <s xml:id="echoid-s1239" xml:space="preserve">Fig. </s>
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2440 <s xml:id="echoid-s1240" xml:space="preserve">22, durch den Knopf ei-<lb/>ner poſitiv geladenen Flaſche, ſtelle ſie in geringer Entfer-<lb/>nung aus einander, und ſchiebe dann die Röhren zuſam-<lb/>men, daß ſich ihre Enden berühren, ſo bleiben die Ku-<lb/>geln in eben dem Zuſtande, in welchem ſie ſich vor der <lb/>Berührung der Röhren befanden, weil ihre Elektricität <lb/>von gleicher Art iſt. </s>
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2441 <s xml:id="echoid-s1241" xml:space="preserve">Eben dies erfolgt, wenn beyde <lb/>Paare an der Belegung elektriſiret werden; </s>
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2442 <s xml:id="echoid-s1242" xml:space="preserve">wird aber ein <lb/>Paar an der Belegung und das andere an dem Knopfe <lb/>elektriſiret, ſo fallen ſie, ſobald ſie an einander gebracht <lb/>werden, ſogleich zuſammen.</s>
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2443 <s xml:id="echoid-s1243" xml:space="preserve"/>
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2444 </p>
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2445 </div>
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2446 <div xml:id="echoid-div122" type="section" level="1" n="118">
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2447 <head xml:id="echoid-head130" xml:space="preserve">98. Verſuch.</head>
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2448 <p>
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2449 <s xml:id="echoid-s1244" xml:space="preserve">Eine Korkkugel, oder eine künſtliche Spinne von <lb/>gebranntem Kork, mit Füßen von leinenen Fäden, an
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2450 <pb o="76" file="0096" n="96" rhead="Siebentes Capitel."/>
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2451 einem ſeidnen Faden aufgehangen, wird zwiſchen den <lb/>Knöpfen zwoer Flaſchen, deren eine poſitiv, die andere <lb/>negativ geladen iſt, hin und her ſpielen, und die Flaſchen <lb/>werden dadurch in kurzer Zeit entladen werden.</s>
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2452 <s xml:id="echoid-s1245" xml:space="preserve"/>
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2453 </p>
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2454 </div>
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2455 <div xml:id="echoid-div123" type="section" level="1" n="119">
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2456 <head xml:id="echoid-head131" xml:space="preserve">99. Verſuch.</head>
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2457 <p>
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2458 <s xml:id="echoid-s1246" xml:space="preserve">Eine an Seide aufgehangene Kugel, zwiſchen zwo <lb/>meſſingenen Knöpfen, deren einer von der äußern, der an-<lb/>dere von der innern Seite einer leidner Flaſche hervor-<lb/>geht, wird, wenn die Flaſche geladen iſt, von einem Knopf <lb/>zum andern fliegen, und auf dieſe Art die Flaſche entla-<lb/>den, indem ſie die elektriſche Materie aus der innern Seite <lb/>in die äußere führt.</s>
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2459 <s xml:id="echoid-s1247" xml:space="preserve"/>
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2460 </p>
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2461 </div>
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2462 <div xml:id="echoid-div124" type="section" level="1" n="120">
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2463 <head xml:id="echoid-head132" xml:space="preserve">100. Verſuch.</head>
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2464 <p>
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2465 <s xml:id="echoid-s1248" xml:space="preserve">Zwiſchen zwo Flaſchen, welche auf einerley Art ge-<lb/>laden ſind, wird eine iſolirte Korkkugel, wenn ſie einmal <lb/>einen Funken erhalten hat, nicht hin und her gehen, ſon-<lb/>dern von beyden Flaſchen gleich ſtark zurückgeſtoßen <lb/>werden.</s>
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2466 <s xml:id="echoid-s1249" xml:space="preserve"/>
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2467 </p>
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2468 </div>
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2469 <div xml:id="echoid-div125" type="section" level="1" n="121">
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2470 <head xml:id="echoid-head133" xml:space="preserve">101. Verſuch.</head>
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2471 <p>
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2472 <s xml:id="echoid-s1250" xml:space="preserve">In Fig. </s>
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2473 <s xml:id="echoid-s1251" xml:space="preserve">58. </s>
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2474 <s xml:id="echoid-s1252" xml:space="preserve">iſt an den untern Theil einer iſolirten <lb/>belegten Flaſche ein Drath befeſtiget, auf welchem ein an-<lb/>derer Drath b c rechtwinklicht aufſteht, auf der Spitze <lb/>des letztern ſteht ein meſſingenes Kreuz. </s>
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2475 <s xml:id="echoid-s1253" xml:space="preserve">Ladet man die <lb/>Flaſche, ſo wird das Kreuz während der Ladung umlau-<lb/>fen, wenn aber die Flaſche geladen iſt, ſtillſtehen. </s>
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2476 <s xml:id="echoid-s1254" xml:space="preserve">Man <lb/>berühre den Knopf der Flaſche mit dem Finger oder einem <lb/>andern leitenden Körper, ſo wird ſich das Kreuz wieder <lb/>ſo lang drehen, bis die Flaſche entladen iſt. </s>
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2477 <s xml:id="echoid-s1255" xml:space="preserve">Ein paar <lb/>Korkkugeln werden von dem Kreuze während der Ladung <lb/>poſitiv, und während der Entladung negativ elektriſirt.</s>
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2478 <s xml:id="echoid-s1256" xml:space="preserve"/>
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2479 </p>
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2480 <pb o="77" file="0097" n="97" rhead="Die leidner Flaſche."/>
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2481 </div>
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2482 <div xml:id="echoid-div126" type="section" level="1" n="122">
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2483 <head xml:id="echoid-head134" xml:space="preserve">102. Verſuch.</head>
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2484 <p>
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2485 <s xml:id="echoid-s1257" xml:space="preserve">Man lege eine reine und trockne geriebene Glastafel, <lb/>etwa einen Quadratſchuh groß, auf ein iſolirtes Käſtgen <lb/>mit Korkkugeln, ſo werden die Kugeln mit poſitiver Elek-<lb/>tricität aus einander gehen, und in trockner Luft wohl vier <lb/>Stunden lang fortfahren einander aufwärts zurückzu-<lb/>ſtoßen. </s>
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2486 <s xml:id="echoid-s1258" xml:space="preserve">Wenn die Kugeln endlich zuſammen kommen, <lb/>nehme man das Glas hinweg, ſo werden ſie mit negati-<lb/>ver Elektricität aus einander gehen; </s>
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2487 <s xml:id="echoid-s1259" xml:space="preserve">man lege das Glas <lb/>wieder darauf, ſo werden ſie zuſammenfallen; </s>
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2488 <s xml:id="echoid-s1260" xml:space="preserve">man neh-<lb/>me es hinweg, ſo werden ſie aus einander gehen; </s>
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2489 <s xml:id="echoid-s1261" xml:space="preserve">dieſe <lb/>Abwechſelung dauret ſo lange fort, als noch einige Elek-<lb/>tricität im Glaſe iſt.</s>
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2490 <s xml:id="echoid-s1262" xml:space="preserve"/>
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2491 </p>
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2492 <p>
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2493 <s xml:id="echoid-s1263" xml:space="preserve">Wird die Glastafel in einen hölzernen Rahmen ge-<lb/>faßt, und eine leichte Korkkugel auf ihre Oberfläche ge-<lb/>legt, ſo wird die Kugel, wenn man den Finger oder eine <lb/>Nadelſpitze dagegen bringt, mit einer ſehr ſchnellen Be-<lb/>wegung davon zurückfliegen, und kann ſo auf der ganzen <lb/>Oberfläche des Glaſes, wie eine Feder in der Luft durch <lb/>eine geriebene Röhre, herumgetrieben werden. </s>
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2494 <s xml:id="echoid-s1264" xml:space="preserve">Denn da <lb/>die Kugel durch die Nadel ihrer Elektricität beraubt wird, <lb/>ſo fliegt ſie augenblicklich nach demjenigen Theile des Gla-<lb/>ſes, der ſie am ſtärkſten anzieht.</s>
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2495 <s xml:id="echoid-s1265" xml:space="preserve"/>
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2496 </p>
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2497 <p>
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2498 <s xml:id="echoid-s1266" xml:space="preserve">Um die Elektricität der Glastafel zu erregen, lege <lb/>man dieſelbe auf einen trocknen Bogen Papier, und reibe <lb/>ſie mit reinem trocknen Flanell.</s>
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2499 <s xml:id="echoid-s1267" xml:space="preserve"/>
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2500 </p>
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2501 </div>
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2502 <div xml:id="echoid-div127" type="section" level="1" n="123">
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2503 <head xml:id="echoid-head135" xml:space="preserve">Beweiſe der entgegengeſetzten Elektricitäten beyder <lb/>Seiten der leidner Flaſche, und der Richtung der <lb/>elektriſchen Materie beym Laden und Entla-<lb/>den, durch die Erſcheinungen des elek-<lb/>triſchen Lichts.</head>
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2504 <p>
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2505 <s xml:id="echoid-s1268" xml:space="preserve">Wir haben bereits im 6ten Capitel bemerkt, daß <lb/>man die verſchiedenen Erſcheinungen des Lichts an elektri-
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2506 <pb o="78" file="0098" n="98" rhead="Siebentes Capitel."/>
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2507 ſirten Spitzen für ein Kennzeichen der Richtung der elek-<lb/>triſchen Materie halte, indem der leuchtende Stern oder <lb/>Punkt zeigt, daß die Spitze elektriſche Materie annehme, <lb/>da hingegen der helle Kegel oder Stralenbüſchel ein Aus-<lb/>gehen der Materie aus der Spitze andeutet. </s>
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2508 <s xml:id="echoid-s1269" xml:space="preserve">Wir wol-<lb/>len jetzt durch dieſe Erſcheinung den Zuſtand beyder Sei-<lb/>ten der leidner Flaſche unterſuchen. </s>
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2509 <s xml:id="echoid-s1270" xml:space="preserve">Hiezu ſo wohl, als <lb/>auch zu vielen andern Abſichten, wird man die Fig. </s>
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2510 <s xml:id="echoid-s1271" xml:space="preserve">49. <lb/></s>
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2511 <s xml:id="echoid-s1272" xml:space="preserve">vorgeſtellte Geräthſchaft ſehr bequem finden; </s>
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2512 <s xml:id="echoid-s1273" xml:space="preserve">ich habe die <lb/>Theile derſelben ſo zu verbinden geſucht, daß das Ganze <lb/>dadurch zu ſehr vielen Zwecken brauchbar wird, ohne doch <lb/>ſehr zuſammengeſetzt zu ſeyn. </s>
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2513 <s xml:id="echoid-s1274" xml:space="preserve">A iſt eine iſolirende Glas-<lb/>ſäule, auf den hölzernen Fuß B geſchraubt; </s>
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2514 <s xml:id="echoid-s1275" xml:space="preserve">alle übrigen <lb/>Theile der Geräthſchaft laſſen ſich auf dieſe Säule ſchrau-<lb/>ben. </s>
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2515 <s xml:id="echoid-s1276" xml:space="preserve">C iſt eine luftleere Glasröhre, an beyden Enden in <lb/>meſſingene Hauben gefaſſet; </s>
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2516 <s xml:id="echoid-s1277" xml:space="preserve">am Ende D iſt ein Ventil <lb/>gehörig unter der meſſingenen Platte angebracht; </s>
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2517 <s xml:id="echoid-s1278" xml:space="preserve">aus der <lb/>obern Haube geht ein meſſingener Drath mit einer Kugel, <lb/>aus der untern Platte ein zugeſpitzter Drath hervor; </s>
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2518 <s xml:id="echoid-s1279" xml:space="preserve">dieſe <lb/>Röhre heiſt der leuchtende Conductor. </s>
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2519 <s xml:id="echoid-s1280" xml:space="preserve">Die bey E <lb/>vorgeſtellte Flaſche heiſt das leidner Vacuum. </s>
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2520 <s xml:id="echoid-s1281" xml:space="preserve">Sie <lb/>hat unter der Kugel E ein Ventil; </s>
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2521 <s xml:id="echoid-s1282" xml:space="preserve">man kann die Kugel <lb/>abſchrauben, um leichter zum Ventile zu kommen; </s>
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2522 <s xml:id="echoid-s1283" xml:space="preserve">ein <lb/>ſtumpfgeendeter Drath geht bis ein wenig unter den Hals <lb/>der Flaſche herab; </s>
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2523 <s xml:id="echoid-s1284" xml:space="preserve">der Boden der Flaſche iſt mit Stan-<lb/>niol belegt, und auswendig eine Schraubenmutter ange-<lb/>küttet, um ſie an die Glasſäule A zu ſchrauben.</s>
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2524 <s xml:id="echoid-s1285" xml:space="preserve"/>
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2525 </p>
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2526 <p>
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2527 <s xml:id="echoid-s1286" xml:space="preserve">F iſt eine kleine Pumpe, mit welcher man die Luft <lb/>nach Erfordern entweder aus dem leuchtenden Conductor <lb/>oder aus dem leidner Vacuum ziehen kann. </s>
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2528 <s xml:id="echoid-s1287" xml:space="preserve">In dieſer <lb/>Abſicht ſchraubt man von dem leidner Vacuum die Kugel, <lb/>oder von dem leuchtenden Conductor die Platte ab, <lb/>ſchraubt an deren Stelle die Pumpe an, ſorgt dafür, daß <lb/>die Schraubenmutter G feſt an das Leder bey a b, c d an-<lb/>ſchließe, und arbeitet mit der Pumpe, ſo werden die Glä-
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2529 <pb o="79" file="0099" n="99" rhead="Die leidner Flaſche."/>
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2530 ſer in wenigen Minuten hinlänglich ausgepumpt ſeyn. </s>
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2531 <s xml:id="echoid-s1288" xml:space="preserve">H <lb/>und I ſind zwo leidner Flaſchen, deren jede eine Schrau-<lb/>benmutter am Boden hat, um ſich gelegentlich an die <lb/>Säule A anſchrauben zu laſſen. </s>
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2532 <s xml:id="echoid-s1289" xml:space="preserve">Die Flaſche H iſt mit <lb/>einem Ringe verſehen, damit man ſie ſeitwärts an die <lb/>Säule A anſchrauben könne. </s>
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2533 <s xml:id="echoid-s1290" xml:space="preserve">K und L ſind zween dünne <lb/>Dräthe, welche man gelegentlich in die Kugel E, in die <lb/>Knöpfe e und f, in die Haube C, oder in g an die Glas-<lb/>ſäule ſchrauben kann. </s>
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2534 <s xml:id="echoid-s1291" xml:space="preserve">Die Kugeln laſſen ſich von dieſen <lb/>Dräthen abſchrauben, und alsdann haben ſie ſtumpfe <lb/>Spitzen. </s>
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2535 <s xml:id="echoid-s1292" xml:space="preserve">M iſt ein hölzernes Täfelchen, das man gele-<lb/>gentlich auf die Glasſäule ſchrauben kann.</s>
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2536 <s xml:id="echoid-s1293" xml:space="preserve"/>
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2537 </p>
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2538 </div>
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2539 <div xml:id="echoid-div128" type="section" level="1" n="124">
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2540 <head xml:id="echoid-head136" xml:space="preserve">103. Verſuch.</head>
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2541 <p>
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2542 <s xml:id="echoid-s1294" xml:space="preserve">Schraubt man die Flaſche I auf die iſolirende Säu-<lb/>le, und den zugeſpitzten Drath in das Loch g, befeſtiget <lb/>einen andern ſpitzigen Drath an das Ende des Condu-<lb/>ctors, bringt den Knopf der Flaſche gegen dieſen Drath, <lb/>und drehet die Maſchine, ſo wird aus dem ſpitzigen Drathe <lb/>am Conductor ein Stralenbüſchel gegen den Knopf der <lb/>Flaſche gehen, und zugleich wird ein anderer Stralenbü-<lb/>ſchel aus der Spitze am Boden der Flaſche in die Luft <lb/>ausfahren, Man ſ. </s>
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2543 <s xml:id="echoid-s1295" xml:space="preserve">Fig. </s>
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2544 <s xml:id="echoid-s1296" xml:space="preserve">50.</s>
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2545 <s xml:id="echoid-s1297" xml:space="preserve"/>
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2546 </p>
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2547 <p>
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2548 <s xml:id="echoid-s1298" xml:space="preserve">Man wiederhole dieſen Verſuch mit dem negativen <lb/>Conductor, ſo wird am Ende beyder Dräthe ein leuchten-<lb/>der Stern erſcheinen.</s>
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2549 <s xml:id="echoid-s1299" xml:space="preserve"/>
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2550 </p>
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2551 </div>
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2552 <div xml:id="echoid-div129" type="section" level="1" n="125">
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2553 <head xml:id="echoid-head137" xml:space="preserve">104. Verſuch.</head>
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2554 <p>
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2555 <s xml:id="echoid-s1300" xml:space="preserve">Man ſchraube einen ſpitzigen Drath in den Knopf <lb/>der Flaſche (ſ. </s>
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2556 <s xml:id="echoid-s1301" xml:space="preserve">Fig. </s>
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2557 <s xml:id="echoid-s1302" xml:space="preserve">51.)</s>
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2558 <s xml:id="echoid-s1303" xml:space="preserve">, und lade ſie poſitiv, ſo wird <lb/>der ſpitzige Drath die elektriſche Materie aus dem Con-<lb/>ductor in ſich nehmen; </s>
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2559 <s xml:id="echoid-s1304" xml:space="preserve">dieſe wird alſo als ein leuchtender <lb/>Stern erſcheinen, indeß der Drath an der äußern Seite <lb/>der Flaſche einen divergirenden Stralenkegel ausſendet.</s>
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2560 <s xml:id="echoid-s1305" xml:space="preserve"/>
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2561 </p>
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2562 <pb o="80" file="0100" n="100" rhead="Siebentes Capitel."/>
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2563 <p>
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2564 <s xml:id="echoid-s1306" xml:space="preserve">Fig. </s>
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2565 <s xml:id="echoid-s1307" xml:space="preserve">52. </s>
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2566 <s xml:id="echoid-s1308" xml:space="preserve">zeigt die vorigen Erſcheinungen umgekehrt, <lb/>wenn man nämlich die Flaſche am poſitiven Conductor <lb/>negativ ladet.</s>
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2567 <s xml:id="echoid-s1309" xml:space="preserve"/>
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2568 </p>
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2569 <p>
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2570 <s xml:id="echoid-s1310" xml:space="preserve">Man kann dieſen Verſuch noch weiter abändern, <lb/>wenn man die Flaſche an einem negativen Conductor <lb/>ladet.</s>
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2571 <s xml:id="echoid-s1311" xml:space="preserve"/>
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2572 </p>
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2573 </div>
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2574 <div xml:id="echoid-div130" type="section" level="1" n="126">
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2575 <head xml:id="echoid-head138" xml:space="preserve">105. Verſuch.</head>
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2576 <p>
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2577 <s xml:id="echoid-s1312" xml:space="preserve">Wenn die Flaſche, wie in den vorigen Verſuchen, <lb/>geladen iſt, ſo drehe man den Drath, der ſich vorhin ge-<lb/>gen den Cylinder zukehrte, nunmehr von demſelben ab, <lb/>und drehe die Maſchine, ſo wird der Zu- und Abfluß noch <lb/>deutlicher, als vorher, erſcheinen: </s>
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2578 <s xml:id="echoid-s1313" xml:space="preserve">indem die elektriſche <lb/>Materie mit der größten Heftigkeit von der einen Spitze <lb/>eingeſogen, und von der andern ausgeſtoßen wird, wo-<lb/>durch ſich die Flaſche in kurzer Zeit entladet.</s>
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2579 <s xml:id="echoid-s1314" xml:space="preserve"/>
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2580 </p>
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2581 </div>
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2582 <div xml:id="echoid-div131" type="section" level="1" n="127">
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2583 <head xml:id="echoid-head139" xml:space="preserve">106. Verſuch.</head>
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2584 <p>
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2585 <s xml:id="echoid-s1315" xml:space="preserve">Man lade die Flaſche, wie vorher, und berühre <lb/>dann den mit der negativen Seite verbundenen Drath, ſo <lb/>wird der entgegengeſetzte Drath einen divergir@nden Stra-<lb/>lenkegel ausſenden; </s>
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2586 <s xml:id="echoid-s1316" xml:space="preserve">wird hingegen die poſitive Seite be-<lb/>rührt, ſo zeigt ſich bloß ein leuchtender Punkt an dem an-<lb/>dern Drathe.</s>
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2587 <s xml:id="echoid-s1317" xml:space="preserve"/>
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2588 </p>
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2589 </div>
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2590 <div xml:id="echoid-div132" type="section" level="1" n="128">
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2591 <head xml:id="echoid-head140" xml:space="preserve">107. Verſuch.</head>
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2592 <p>
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2593 <s xml:id="echoid-s1318" xml:space="preserve">Fig. </s>
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2594 <s xml:id="echoid-s1319" xml:space="preserve">53. </s>
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2595 <s xml:id="echoid-s1320" xml:space="preserve">iſt eine elektriſche Flaſche, B B die Stan-<lb/>niolbelegung, C ein Stativ, welches die Flaſche trägt, <lb/>D eine metallene Tülle, auf welcher die Glasſäule E ſte-<lb/>het; </s>
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2596 <s xml:id="echoid-s1321" xml:space="preserve">ein gebogner und an beyden Enden zugeſpitzter me-<lb/>talliſcher Drath F iſt an das Ende des Stabes G befeſti-<lb/>get, welcher Stab ſich nach Gefallen in der federnden <lb/>Röhre N verſchieben läßt. </s>
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2597 <s xml:id="echoid-s1322" xml:space="preserve">Dieſe Röhre iſt auf die Glas-<lb/>ſäule E befeſtiget; </s>
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2598 <s xml:id="echoid-s1323" xml:space="preserve">der zur Ladung dienende Stab aber iſt <lb/>mit den verſchiedenen Abtheilungen der innern Belegung <lb/>der Flaſche durch horizontale Dräthe verbunden.</s>
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2599 <s xml:id="echoid-s1324" xml:space="preserve"/>
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2600 </p>
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2601 <pb o="81" file="0101" n="101" rhead="Die leidner Flaſche."/>
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2602 <p>
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2603 <s xml:id="echoid-s1325" xml:space="preserve">Man ſtelle die Flaſche, wie gewöhnlich, und ſetze <lb/>die Maſchine in Bewegung, ſo wird ſich an der obern <lb/>Spitze des Draths F ein kleiner leuchtender Punkt zeigen <lb/>(ein deutliches Zeichen, daß die Spitze alsdann aus dem <lb/>obern Ringe der äußern Belegung Elektricität in ſich <lb/>nimmt), zugleich wird aus der untern Spitze des Draths <lb/>F ein ſehr ſchöner feiner Stralenkegel gegen die unterſte <lb/>Zone der Belegung zu ſchießen. </s>
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2604 <s xml:id="echoid-s1326" xml:space="preserve">Wenn dieſe Erſcheinun-<lb/>gen aufhören, welches geſchieht, ſobald die Flaſche gela-<lb/>den iſt, bringe man einen zugeſpitzten Drath gegen den <lb/>erſten Leiter; </s>
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2605 <s xml:id="echoid-s1327" xml:space="preserve">dieſer wird die Flaſche ſtillſchweigend entla-<lb/>den, und während dieſer Entladung wird die untere Spitze <lb/>mit einem kleinen Funken erleuchtet ſeyn, die obere hinge-<lb/>gen wird einen Stralenbüſchel ausſenden, welcher gegen <lb/>die obere Zone der Belegung zu divergiret.</s>
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2606 <s xml:id="echoid-s1328" xml:space="preserve"/>
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2607 </p>
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2608 </div>
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2609 <div xml:id="echoid-div133" type="section" level="1" n="129">
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2610 <head xml:id="echoid-head141" xml:space="preserve">108. Verſuch.</head>
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2611 <p>
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2612 <s xml:id="echoid-s1329" xml:space="preserve">Man nehme eine leidner Flaſche, deren Hals nicht <lb/>ſehr breit iſt, ſtelle ihre Belegung an den Conductor, und <lb/>lade ſie negativ. </s>
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2613 <s xml:id="echoid-s1330" xml:space="preserve">Es wird alsdann, wenn die Flaſche <lb/>nicht allzutrocken iſt, der obere Rand der Belegung einen <lb/>oder mehrere Lichtbüſchel in die Luft ausſenden, welche ſich <lb/>ſehr merklich gegen den ladenden Drath in der Mitte der <lb/>Flaſche beugen, und bisweilen denſelben wirklich erreichen <lb/>werden. </s>
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2614 <s xml:id="echoid-s1331" xml:space="preserve">Man halte den Knopf an den erſten Leiter, und <lb/>lade die Flaſche poſitiv, ſo wird anfänglich nach einigen <lb/>Umdrehungen des Cylinders ein kleiner leuchtender Funken <lb/>am Rande des Korkes im Halſe der Flaſche erſcheinen; <lb/></s>
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2615 <s xml:id="echoid-s1332" xml:space="preserve">dieſer Funken verwandlet ſich in einen Stralenbüſchel, der <lb/>vom Korke ausgeht, und ſich nach und nach in einen Bo-<lb/>gen verlängert, deſſen Ende ſich niederwärts bis an den <lb/>Rand der Belegung erſtrecket. </s>
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2616 <s xml:id="echoid-s1333" xml:space="preserve">Iſt die Flaſche trocken, <lb/>ſo entladet ſie ſich in beyden Fällen freywillig. </s>
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2617 <s xml:id="echoid-s1334" xml:space="preserve">Man <lb/>ſ. </s>
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2618 <s xml:id="echoid-s1335" xml:space="preserve">Fig. </s>
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2619 <s xml:id="echoid-s1336" xml:space="preserve">54 und 55.</s>
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2620 <s xml:id="echoid-s1337" xml:space="preserve"/>
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2621 </p>
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2622 <pb o="82" file="0102" n="102" rhead="Siebentes Capitel."/>
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2623 </div>
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2624 <div xml:id="echoid-div134" type="section" level="1" n="130">
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2625 <head xml:id="echoid-head142" xml:space="preserve">109. Verſuch.</head>
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2626 <p>
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2627 <s xml:id="echoid-s1338" xml:space="preserve">Eine iſolirte poſitiv geladene Flaſche giebt einer ge-<lb/>riebenen Stange Siegellak aus ihrem Knopfe einen Fun-<lb/>ken; </s>
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2628 <s xml:id="echoid-s1339" xml:space="preserve">da hingegen zwiſchen demſelben und einer geriebe-<lb/>nen Glasröhre kein Funken entſteht.</s>
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2629 <s xml:id="echoid-s1340" xml:space="preserve"/>
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2630 </p>
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2631 </div>
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2632 <div xml:id="echoid-div135" type="section" level="1" n="131">
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2633 <head xml:id="echoid-head143" xml:space="preserve">110. Verſuch.</head>
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2634 <head xml:id="echoid-head144" xml:space="preserve">Zergliederung der leidner Flaſche durch das <lb/>leidner Vacuum E, Fig. 49.</head>
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2635 <p>
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2636 <s xml:id="echoid-s1341" xml:space="preserve">Man ſchraube das leidner Vacuum auf den iſoliren-<lb/>den Fuß, mit dem zugeſpitzten Drathe am Boden. </s>
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2637 <s xml:id="echoid-s1342" xml:space="preserve">Fig. <lb/></s>
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2638 <s xml:id="echoid-s1343" xml:space="preserve">56. </s>
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2639 <s xml:id="echoid-s1344" xml:space="preserve">z igt die Erſcheinungen der elektriſchen Materie an <lb/>den Spitzen, wenn die Flaſche an einem poſitiven Con-<lb/>ductor negativ geladen wird.</s>
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2640 <s xml:id="echoid-s1345" xml:space="preserve"/>
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2641 </p>
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2642 <p>
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2643 <s xml:id="echoid-s1346" xml:space="preserve">Fig. </s>
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2644 <s xml:id="echoid-s1347" xml:space="preserve">57. </s>
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2645 <s xml:id="echoid-s1348" xml:space="preserve">zeigt die Erſcheinungen, wenn die Flaſche <lb/>an eben demſelben Conductor poſitiv geladen wird.</s>
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2646 <s xml:id="echoid-s1349" xml:space="preserve"/>
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2647 </p>
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2648 <p>
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2649 <s xml:id="echoid-s1350" xml:space="preserve">Fig. </s>
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2650 <s xml:id="echoid-s1351" xml:space="preserve">59. </s>
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2651 <s xml:id="echoid-s1352" xml:space="preserve">wird dieſelbe Flaſche am negativen Con-<lb/>ductor poſitiv, und Fig. </s>
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2652 <s xml:id="echoid-s1353" xml:space="preserve">60. </s>
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2653 <s xml:id="echoid-s1354" xml:space="preserve">an eben demſelben negativ <lb/>geladen.</s>
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2654 <s xml:id="echoid-s1355" xml:space="preserve"/>
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2655 </p>
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2656 </div>
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2657 <div xml:id="echoid-div136" type="section" level="1" n="132">
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2658 <head xml:id="echoid-head145" xml:space="preserve">111. Verſuch.</head>
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2659 <p>
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2660 <s xml:id="echoid-s1356" xml:space="preserve">Fig. </s>
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2661 <s xml:id="echoid-s1357" xml:space="preserve">61. </s>
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2662 <s xml:id="echoid-s1358" xml:space="preserve">ſtellt den leuchtenden Conductor auf dem <lb/>iſolirten Fuße vor. </s>
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2663 <s xml:id="echoid-s1359" xml:space="preserve">Man ſetze die einſaugende Spitze <lb/>nahe an den Cylinder, bringe den Knopf einer ungelade-<lb/>nen Flaſche in Berührung mit der Kugel, oder laſſe eine <lb/>Kette von derſelben auf den Tiſch herabhängen, und drehe <lb/>die Maſchine, ſo wird ſich die Kugel in eine dichte elek-<lb/>triſche Atmoſphäre hüllen. </s>
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2664 <s xml:id="echoid-s1360" xml:space="preserve">Wird die Spitze an ein iſo-<lb/>lirtes Küſſen gebracht, und die Kugel mit dem Tiſche ver-<lb/>bunden, ſo wird ſich die Atmoſphäre an der in der Röhre <lb/>befindlichen Spitze zeigen. </s>
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2665 <s xml:id="echoid-s1361" xml:space="preserve">Bringt man eine poſitiv ge-<lb/>ladene Flaſche dagegen, ſo ſind die Erſcheinungen in der <lb/>Röhre, wie bey Fig. </s>
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2666 <s xml:id="echoid-s1362" xml:space="preserve">62. </s>
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2667 <s xml:id="echoid-s1363" xml:space="preserve">Wird aber eine negativ gela-<lb/>dene Flaſche dagegen gehalten, ſo ſind ſie, wie Fig. </s>
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2668 <s xml:id="echoid-s1364" xml:space="preserve">61.</s>
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2669 <s xml:id="echoid-s1365" xml:space="preserve"/>
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2670 </p>
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2671 <pb o="83" file="0103" n="103" rhead="Die leidner Flaſche."/>
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2672 <p>
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2673 <s xml:id="echoid-s1366" xml:space="preserve">Man kan dieſe Röhre, wenn ſie auf dem iſolirenden <lb/>Fuße ſtehet, anſtatt des erſten Leiters gebrauchen, und alle <lb/>gewöhnliche Verſuche damit anſtellen; </s>
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2674 <s xml:id="echoid-s1367" xml:space="preserve">ſie leuchtet wäh-<lb/>rend der Operation unaufhörlich.</s>
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2675 <s xml:id="echoid-s1368" xml:space="preserve"/>
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2676 </p>
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2677 </div>
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2678 <div xml:id="echoid-div137" type="section" level="1" n="133">
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2679 <head xml:id="echoid-head146" xml:space="preserve">Von der Richtung der elektriſchen Materie beym <lb/>Entladen der leidner Flaſche.</head>
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2680 <head xml:id="echoid-head147" xml:space="preserve">112. Verſuch.</head>
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2681 <p>
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2682 <s xml:id="echoid-s1369" xml:space="preserve">Man ſtelle eine geladene Flaſche auf einem kleinen <lb/>gläſernen Stativ unter die Glocke einer Luftpumpe; </s>
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2683 <s xml:id="echoid-s1370" xml:space="preserve">ſo <lb/>wie nun die Glocke ausgeleeret wird, ſo wird die elektriſche <lb/>Muterie in Geſtalt eines ſehr hellen Stralenkegels aus <lb/>dem Drathe der Flaſche herausgehen, und nach der Be-<lb/>legung zu ſtrömen, bis die Luft völlig ausgeleert iſt. </s>
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2684 <s xml:id="echoid-s1371" xml:space="preserve">Als-<lb/>dann wird man auch die Flaſche entladen finden.</s>
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2685 <s xml:id="echoid-s1372" xml:space="preserve"/>
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2686 </p>
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2687 <p>
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2688 <s xml:id="echoid-s1373" xml:space="preserve">Iſt die Flaſche negativ geladen, ſo wird der leuch-<lb/>tende Strom gerade die entgegengeſetzte Richtung von der <lb/>vorigen nehmen.</s>
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2689 <s xml:id="echoid-s1374" xml:space="preserve"/>
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2690 </p>
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2691 <p>
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2692 <s xml:id="echoid-s1375" xml:space="preserve">Man kan aus dieſem Verſuche die Wirkung des Drucks <lb/>der Atmoſphäre auf die leidner Flaſche beurtheilen, und ſehen, <lb/>daß dieſer Druck die natürliche Grenze jeder Ladung mit <lb/>Elektricität beſtimme, und daß alſo eine Flaſche in einer <lb/>doppelt ſo dichten Luſt eine doppelt ſo ſtarke Ladung halte, <lb/>als in der gemeinen atmoſphäriſchen Luft, indem die Stär-<lb/>ke der elektriſchen Atmoſphäre durch den Druck der Luft <lb/>vergrößert wird.</s>
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2693 <s xml:id="echoid-s1376" xml:space="preserve"/>
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2694 </p>
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2695 </div>
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2696 <div xml:id="echoid-div138" type="section" level="1" n="134">
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2697 <head xml:id="echoid-head148" xml:space="preserve">113. Verſuch.</head>
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2698 <p>
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2699 <s xml:id="echoid-s1377" xml:space="preserve">Man ſetze ein kleines angezündetes Wachslicht zwi-<lb/>ſchen die beyden Knöpfe des allgemeinen Ausladers, und <lb/>laſſe eine ſehr ſchwache Ladung einer poſitiven Flaſche hin-<lb/>durchgehen, ſo wird die Flamme des Wachslichts nach der <lb/>Richtung der elektriſchen Materie gegen die Belegung zu, <lb/>angezogen werden. </s>
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2700 <s xml:id="echoid-s1378" xml:space="preserve">Man ſ. </s>
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2701 <s xml:id="echoid-s1379" xml:space="preserve">Fig. </s>
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2702 <s xml:id="echoid-s1380" xml:space="preserve">63.</s>
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2703 <s xml:id="echoid-s1381" xml:space="preserve"/>
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2704 </p>
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2705 <pb o="84" file="0104" n="104" rhead="Siebentes Capitel."/>
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2706 </div>
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2707 <div xml:id="echoid-div139" type="section" level="1" n="135">
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2708 <head xml:id="echoid-head149" xml:space="preserve">114. Verſuch.</head>
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2709 <p>
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2710 <s xml:id="echoid-s1382" xml:space="preserve">Iſt eben dieſe ſchwache Ladung einer negativen Fla-<lb/>ſche gegeben, ſo wird die Erſcheinung gerade die umge-<lb/>kehrte ſeyn.</s>
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2711 <s xml:id="echoid-s1383" xml:space="preserve"/>
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2712 </p>
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2713 <p>
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2714 <s xml:id="echoid-s1384" xml:space="preserve">Bey beyden Verſuchen muß man die Ladung ſo <lb/>ſchwach, als möglich, geben, ſo daß ſie nur gerade hin-<lb/>reichend iſt, über die Unterbrechung in der Verbindung <lb/>zu ſchlagen.</s>
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2715 <s xml:id="echoid-s1385" xml:space="preserve"/>
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2716 </p>
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2717 </div>
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2718 <div xml:id="echoid-div140" type="section" level="1" n="136">
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2719 <head xml:id="echoid-head150" xml:space="preserve">115. Verſuch.</head>
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2720 <p>
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2721 <s xml:id="echoid-s1386" xml:space="preserve">Man lege ein Kartenblatt auf das Tiſchgen des all-<lb/>gemeinen Ausladers, bringe das Ende des einen Draths <lb/>unter das Kartenblatt, und verbinde es mit der Belegung <lb/>einer poſitiv geladenen Flaſche, das Ende des andern <lb/>Draths lege man oben auf das Kartenblatt etwa andert-<lb/>halb Zoll weit von dem vorigen entfernt; </s>
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2722 <s xml:id="echoid-s1387" xml:space="preserve">man mache hier-<lb/>auf die Verbindung vollſtändig, indem man den Ausla-<lb/>der an den letzten Drath und an den Knopf der Flaſche <lb/>bringt, ſo wird die elektriſche Materie durch den obern <lb/>Drath längſt der Oberfläche des Kartenblatts hingehen, <lb/>bis ſie an das unter der Karte befindliche Ende des <lb/>andern Draths kömmt. </s>
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2723 <s xml:id="echoid-s1388" xml:space="preserve">Hier wird ſie ein Loch durch das <lb/>Kartenblatt bohren, und durch den Drath in die Bele-<lb/>gung der Flaſche übergehen. </s>
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2724 <s xml:id="echoid-s1389" xml:space="preserve">Man ſ. </s>
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2725 <s xml:id="echoid-s1390" xml:space="preserve">Fig. </s>
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2726 <s xml:id="echoid-s1391" xml:space="preserve">64.</s>
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2727 <s xml:id="echoid-s1392" xml:space="preserve"/>
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2728 </p>
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2729 </div>
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2730 <div xml:id="echoid-div141" type="section" level="1" n="137">
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2731 <head xml:id="echoid-head151" xml:space="preserve">116. Verſuch.</head>
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2732 <p>
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2733 <s xml:id="echoid-s1393" xml:space="preserve">Wenn man vier Korkkugeln A, B, C, D in glei-<lb/>chen Entfernungen von einander, zwiſchen den Knopf des <lb/>Ausladers und die Belegung einer poſitiv geladenen Fla-<lb/>ſche ſtellt, und nun die Flaſche entladet, ſo wird die Ku-<lb/>gel A, die dem Auslader am nächſten liegt, gegen B, und <lb/>B gegen C geſtoßen, C bleibt unbewegt, und D fliegt ge-<lb/>gen die Belegung der Flaſche.</s>
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2734 <s xml:id="echoid-s1394" xml:space="preserve"/>
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2735 </p>
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2736 <pb o="85" file="0105" n="105" rhead="Die leidner Flaſche."/>
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2737 </div>
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2738 <div xml:id="echoid-div142" type="section" level="1" n="138">
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2739 <head xml:id="echoid-head152" xml:space="preserve">117. Verſuch.</head>
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2740 <p>
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2741 <s xml:id="echoid-s1395" xml:space="preserve">Man mache auf beyde Seiten eines Kartenblatts <lb/>einen fingerbreiten Strich mit Zinnober, befeſtige dieſes <lb/>Blatt mit ein wenig Wachs vertikal auf das Tiſchgen des <lb/>allgemeinen Ausladers, laſſe das Ende des einen Draths <lb/>die eine, und das Ende des andern Draths die entgegen-<lb/>geſetzte Seite berühren; </s>
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2742 <s xml:id="echoid-s1396" xml:space="preserve">die Entfernung beyder Enden von <lb/>einander muß mit der Stärke der Ladung im Verhältniß <lb/>ſtehen. </s>
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2743 <s xml:id="echoid-s1397" xml:space="preserve">Entladet man nun die Flaſche durch die Dräthe, <lb/>ſo zeigt der ſchwarze Streif, den die Exploſion auf dem <lb/>mit Zinnober gefärbten Striche zurückläßt, daß die elek-<lb/>triſche Materie von dem Drathe, der mit der innern Seite <lb/>der Flaſche in Verbindung ſteht, in denjenigen überge-<lb/>gangen ſey, welcher mit der äußern Seite verbunden iſt, <lb/>gegen welchen letztern ſie ein Loch ſchlägt.</s>
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2744 <s xml:id="echoid-s1398" xml:space="preserve"/>
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2745 </p>
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2746 </div>
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2747 <div xml:id="echoid-div143" type="section" level="1" n="139">
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2748 <head xml:id="echoid-head153" xml:space="preserve">Verſuche, welche gegen die angenommene Theorie <lb/>der Elektricität zu ſtreiten ſcheinen.</head>
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2749 <head xml:id="echoid-head154" xml:space="preserve">118. Verſuch.</head>
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2750 <p>
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2751 <s xml:id="echoid-s1399" xml:space="preserve">Man lade die Oberflächen einer elektriſchen Platte <lb/>ganz gelind, iſolire ſie, und mache eine unterbrochene Ver-<lb/>bindung, ſo werden beyde Kräfte ſichtbar werden, und <lb/>die an der unterbrochenen Verbindung befindlichen Spitzen <lb/>erleuchten: </s>
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2752 <s xml:id="echoid-s1400" xml:space="preserve">jede Kraft wird ſich von der Oberfläche, von <lb/>welcher ſie ausgeht, immer weiter erſtrecken, je ſtärker <lb/>die Platte geladen wird; </s>
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2753 <s xml:id="echoid-s1401" xml:space="preserve">wenn aber die Erleuchtungen <lb/>von beyden Seiten einander begegnen, ſo wird ſogleich eine <lb/>Exploſion der ganzen Ladung erfolgen.</s>
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2754 <s xml:id="echoid-s1402" xml:space="preserve"/>
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2755 </p>
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2756 </div>
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2757 <div xml:id="echoid-div144" type="section" level="1" n="140">
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2758 <head xml:id="echoid-head155" xml:space="preserve">119. Verſuch.</head>
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2759 <p>
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2760 <s xml:id="echoid-s1403" xml:space="preserve">Wenn man eine cylindriſche Luſtplatte unter der <lb/>Glocke einer Luftpumpe ladet, ſo werden ſich beyde Kräfte <lb/>deſto leichter vereinigen, je mehr Luft zwiſchen beyden <lb/>Flächen weggepumpet wird.</s>
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2761 <s xml:id="echoid-s1404" xml:space="preserve"/>
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2762 </p>
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2763 <pb o="86" file="0106" n="106" rhead="Siebentes Capitel."/>
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2764 </div>
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2765 <div xml:id="echoid-div145" type="section" level="1" n="141">
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2766 <head xml:id="echoid-head156" xml:space="preserve">120. Verſuch.</head>
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2767 <p>
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2768 <s xml:id="echoid-s1405" xml:space="preserve">Wenn eine luftleere Glocke zum Theile einer elektri-<lb/>ſchen Verbindung gemacht wird, und die Ladung nicht <lb/>hinreichend iſt, einen Schlag zu verurſachen, ſo wird man <lb/>ein elektriſches Licht in entgegengeſetzten Richtungen aus <lb/>den Theilen hervorgehen ſehen, welche mit der poſitiven <lb/>und negativen Fläche verbunden ſind.</s>
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2769 <s xml:id="echoid-s1406" xml:space="preserve"/>
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2770 </p>
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2771 </div>
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2772 <div xml:id="echoid-div146" type="section" level="1" n="142">
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2773 <head xml:id="echoid-head157" xml:space="preserve">121. Verſuch.</head>
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2774 <p>
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2775 <s xml:id="echoid-s1407" xml:space="preserve">Man ſetze eine belegte Flaſche auf ein iſolirendes <lb/>Stativ, und berühre ihren Knopf mit dem Knopfe einer <lb/>andern negativ geladenen Flaſche, ſo wird man zwiſchen <lb/>beyden einen kleinen Funken ſehen, und beyde Seiten der <lb/>iſolirten Flaſche werden ſogleich negativ elektriſiret ſeyn.</s>
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2776 <s xml:id="echoid-s1408" xml:space="preserve"/>
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2777 </p>
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2778 </div>
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2779 <div xml:id="echoid-div147" type="section" level="1" n="143">
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2780 <head xml:id="echoid-head158" xml:space="preserve">122. Verſuch.</head>
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2781 <p>
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2782 <s xml:id="echoid-s1409" xml:space="preserve">Man befeſtige ein Elektrometer von Korkkugeln mit <lb/>ein wenig Wachs an die äußere Belegung einer Flaſche, <lb/>lade die Flaſche ganz gelind poſitiv, und ſetze ſie auf ein iſo-<lb/>lirendes Stativ, ſo werden die Kugeln entweder gar nicht <lb/>oder nur ſehr wenig aus einander gehen. </s>
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2783 <s xml:id="echoid-s1410" xml:space="preserve">Man bringe den <lb/>Knopf einer ſtark poſitiv geladenen Flaſche an den Knopf <lb/>der vorigen, ſo werden die Bälle mit poſitiver Elektricität <lb/>aus einander gehen.</s>
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2784 <s xml:id="echoid-s1411" xml:space="preserve"/>
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2785 </p>
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2786 </div>
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2787 <div xml:id="echoid-div148" type="section" level="1" n="144">
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2788 <head xml:id="echoid-head159" xml:space="preserve">123. Verſuch.</head>
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2789 <p>
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2790 <s xml:id="echoid-s1412" xml:space="preserve">Man lade eben dieſe Flaſche mit den an ihre äußere <lb/>Belegung befeſtigten Korkkugeln, gelind negativ, iſolire <lb/>ſie hierauf, und bringe den Knopf einer ſtark negativ ge-<lb/>ladenen Flaſche an den Knopf der iſolirten, ſo werden die <lb/>Kugeln mit negativer Elektricität aus einander gehen.</s>
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2791 <s xml:id="echoid-s1413" xml:space="preserve"/>
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2792 </p>
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2793 </div>
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2794 <div xml:id="echoid-div149" type="section" level="1" n="145">
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2795 <head xml:id="echoid-head160" xml:space="preserve">124. Verſuch.</head>
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2796 <p>
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2797 <s xml:id="echoid-s1414" xml:space="preserve">Man lade eine Flaſche poſitiv, iſolire ſie, lade eine <lb/>andere ſehr ſtark negativ, und bringe den Knopf der ne-
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2798 <pb o="87" file="0107" n="107" rhead="Die leidner Flaſche."/>
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2799 gativen nahe an den Knopf der poſitiven, ſo wird <lb/>ein Faden zwiſchen beyden hin und her ſpielen; <lb/></s>
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2800 <s xml:id="echoid-s1415" xml:space="preserve">wenn aber die Knöpfe einander berühren, ſo werden <lb/>die Fäden zuerſt angezogen, und dann von beyden <lb/>zurückgeſtoßen. </s>
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2801 <s xml:id="echoid-s1416" xml:space="preserve">Die negative Elektricität tritt gleich-<lb/>ſam @an die Stelle der poſitiven, und, wenn man <lb/>beyde wieder von einander trennt, ſo ſind ſie einige <lb/>Minuten lang beyde negativ; </s>
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2802 <s xml:id="echoid-s1417" xml:space="preserve">wenn man aber dem Kno-<lb/>pfe der Flaſche, in welche die negative Elektricität ge-<lb/>bracht wurde, den Finger nähert, ſo zerſtreut ſich dieſe <lb/>Elektricität augenblicklich, der Finger erhält einen ſchwa-<lb/>chen Funken, und die Flaſche iſt wieder poſitiv geladen, <lb/>wie vorher.</s>
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2803 <s xml:id="echoid-s1418" xml:space="preserve"/>
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2804 </p>
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2805 </div>
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2806 <div xml:id="echoid-div150" type="section" level="1" n="146">
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2807 <head xml:id="echoid-head161" xml:space="preserve"><emph style="bf">Achtes Capitel.</emph></head>
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2808 <head xml:id="echoid-head162" xml:space="preserve">Von der elektriſchen Batterie, und der Lateral-<lb/>exploſion geladener Flaſchen.</head>
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2809 <p>
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2810 <s xml:id="echoid-s1419" xml:space="preserve">Zu Verſtärkung der elektriſchen Exploſion pflegt man <lb/>mehrere leidner Flaſchen mit einander in einem Ka-<lb/>ſten zu verbinden, und dieſe Geräthſchaft eine elektriſche <lb/>Batterie zu nennen. </s>
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2811 <s xml:id="echoid-s1420" xml:space="preserve">Fig. </s>
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2812 <s xml:id="echoid-s1421" xml:space="preserve">65. </s>
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2813 <s xml:id="echoid-s1422" xml:space="preserve">ſtellt eine der beliebte-<lb/>ſten Einrichtungen derſelben vor.</s>
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2814 <s xml:id="echoid-s1423" xml:space="preserve"/>
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2815 </p>
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2816 <p>
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2817 <s xml:id="echoid-s1424" xml:space="preserve">Der Boden des Kaſtens iſt mit Stanniol überlegt, <lb/>um die äußern Belegungen der Flaſchen mit einander zu <lb/>verbinden. </s>
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2818 <s xml:id="echoid-s1425" xml:space="preserve">Die innern ſind durch die Dräthe b, c, d, e, f, g <lb/>verbunden, welche ſich in die große Kugel A vereinigen; <lb/></s>
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2819 <s xml:id="echoid-s1426" xml:space="preserve">C iſt ein Hacken a<unsure/>m Boden des Kaſtens, durch welchen <lb/>man etwas mit der äußern Belegung der Flaſchen verbin-<lb/>den kann; </s>
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2820 <s xml:id="echoid-s1427" xml:space="preserve">von der innern Seite geht die Kugel B hervor-<lb/>durch welche die Verbindung gelegentlich vollſtändig ge-<lb/>macht werden kann. </s>
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2821 <s xml:id="echoid-s1428" xml:space="preserve">Beym Gebrauch der elektriſchen <lb/>Batterie ſind folgende Vorſichtsregeln in Acht zu nehmen.</s>
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2822 <s xml:id="echoid-s1429" xml:space="preserve"/>
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2823 </p>
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diff changeset
2824 <pb o="88" file="0108" n="108" rhead="Achtes Capitel."/>
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diff changeset
2825 <p>
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2826 <s xml:id="echoid-s1430" xml:space="preserve">Den obern unbelegten Theil der Flaſchen muß man <lb/>trocken und rein vom Staub halten, und nach der Explo-<lb/>ſion einen Drath vom Hacken bis an die Kugel gehen laſ-<lb/>ſen, welcher in dieſer Lage bleiben muß, bis man die Bat-<lb/>terie wieder laden will. </s>
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diff changeset
2827 <s xml:id="echoid-s1431" xml:space="preserve">Dadurch wird man allen Scha-<lb/>den, welcher ſonſt aus dem Ueberreſte der Ladung entſte-<lb/>hen könnte, gänzlich vermeiden.</s>
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diff changeset
2828 <s xml:id="echoid-s1432" xml:space="preserve"/>
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diff changeset
2829 </p>
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diff changeset
2830 <p>
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diff changeset
2831 <s xml:id="echoid-s1433" xml:space="preserve">Wenn eine Flaſche in der Batterie zerbrochen iſt, ſo <lb/>iſt es unmöglich, die übrigen zu laden, bis die zerbroche-<lb/>ne weggenommen iſt.</s>
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diff changeset
2832 <s xml:id="echoid-s1434" xml:space="preserve"/>
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diff changeset
2833 </p>
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diff changeset
2834 <p>
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diff changeset
2835 <s xml:id="echoid-s1435" xml:space="preserve">Um die Flaſchen einer großen Batterie vor dem <lb/>Zerbrechen beym Schlage zu bewahren, hat man angera-<lb/>then, keine Batterie durch einen guten Leiter zu entladen, <lb/>wofern nicht die Verbindung aufs wenigſte fünf Schuh <lb/>lang ſey. </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
2836 <s xml:id="echoid-s1436" xml:space="preserve">Aber was man durch dieſe Methode auf der <lb/>einen Seite gewinnt, das verliert man auf der andern <lb/>wieder; </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
2837 <s xml:id="echoid-s1437" xml:space="preserve">denn durch Verlängerung der Verbindung wird <lb/>die Stärke des Schlags verhältnißmäßig vermindert.</s>
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diff changeset
2838 <s xml:id="echoid-s1438" xml:space="preserve"/>
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diff changeset
2839 </p>
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diff changeset
2840 <p>
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diff changeset
2841 <s xml:id="echoid-s1439" xml:space="preserve">Man hat mir geſagt, daß die zu Newcaſtle ver-<lb/>fertigten Flaſchen von grünem Glas nicht leicht von einer <lb/>Exploſion zerbrächen; </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
2842 <s xml:id="echoid-s1440" xml:space="preserve">allein ich habe nicht Gelegenheit <lb/>gehabt, mit dergleichen Glaſe ſelbſt Verſuche anzuſtellen.</s>
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diff changeset
2843 <s xml:id="echoid-s1441" xml:space="preserve"/>
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diff changeset
2844 </p>
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diff changeset
2845 <p>
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diff changeset
2846 <s xml:id="echoid-s1442" xml:space="preserve">Dle Stärke einer Batterie wird beträchtlich ver-<lb/>mehrt, wenn man den Schlag bey der Exploſion concen-<lb/>triret, welches geſchiehet, wenn man ihn durch kleine Ver-<lb/>bindungen nicht-leitender Subſtanzen gehen läßt. </s>
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2847 <s xml:id="echoid-s1443" xml:space="preserve">Hie-<lb/>durch kann das widerſtehende Mittel, durch welches der <lb/>Funken gehen muß, ſo zubereitet werden, daß es die Stär-<lb/>ke deſſelben vermehret. </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
2848 <s xml:id="echoid-s1444" xml:space="preserve">Läßt man ihn durch eine ein <lb/>Zwölftel oder ein Sechstel Zoll weite Oefnung in einer <lb/>Glasplatte gehen, ſo wird er weniger zerſtreut, compa-<lb/>cter und kräftiger. </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
2849 <s xml:id="echoid-s1445" xml:space="preserve">Wird die Stelle um die Oefnung <lb/>herum mit ein wenig Waſſer angefeuchtet, ſo wird der <lb/>Funken, der dieſes Waſſer in Dämpfe verwandlet, auf <lb/>eine größere Weite fortgeführet, ſeine Geſchwindigkeit ver-<lb/>größert, und der Schall iſt lauter, als gewöhnlich.</s>
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diff changeset
2850 <s xml:id="echoid-s1446" xml:space="preserve"/>
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diff changeset
2851 </p>
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diff changeset
2852 <pb o="89" file="0109" n="109" rhead="Elektriſche Batterie und Lateralexploſion."/>
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diff changeset
2853 <p>
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2854 <s xml:id="echoid-s1447" xml:space="preserve">Durch dieſe und einige andere Mittel hat Herr <lb/>Morgan mit ganz kleinen Flaſchen Drath geſchmolzen <lb/>u. </s>
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2855 <s xml:id="echoid-s1448" xml:space="preserve">dgl. </s>
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2856 <s xml:id="echoid-s1449" xml:space="preserve">Vielleicht wird er dieſe und ſeine übrigen wichti-<lb/>gen Entdeckungen dem Publikum bald mittheilen.</s>
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2857 <s xml:id="echoid-s1450" xml:space="preserve"/>
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diff changeset
2858 </p>
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diff changeset
2859 </div>
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2860 <div xml:id="echoid-div151" type="section" level="1" n="147">
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2861 <head xml:id="echoid-head163" xml:space="preserve">125. Verſuch.</head>
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2862 <p>
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2863 <s xml:id="echoid-s1451" xml:space="preserve">Man laſſe die Ladung einer ſtarken Batterie durch <lb/>2 – 3 Zoll dünnen Drath gehen, ſo wird derſelbe biswei-<lb/>len glühend werden, zuerſt auf der poſitiven Seite, und <lb/>in der Regel wird das Glühen nach dem andern Ende zu <lb/>fortgehen.</s>
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diff changeset
2864 <s xml:id="echoid-s1452" xml:space="preserve"/>
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diff changeset
2865 </p>
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diff changeset
2866 </div>
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2867 <div xml:id="echoid-div152" type="section" level="1" n="148">
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2868 <head xml:id="echoid-head164" xml:space="preserve">126. Verſuch.</head>
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diff changeset
2869 <p>
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diff changeset
2870 <s xml:id="echoid-s1453" xml:space="preserve">Man entlade eine Batterie durch ein Buch Papier, <lb/>ſo wird ſie ein Loch durch daſſelbe ſchlagen; </s>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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2871 <s xml:id="echoid-s1454" xml:space="preserve">jedes Blatt <lb/>wird durch den Schlag von der Mitte aus gegen die auſ-<lb/>ſen anliegenden Blätter zu durchbrochen, gerade als ob der <lb/>Schlag von ſeinem Innern aus auf beyde Seiten ausge-<lb/>brochen wäre. </s>
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2872 <s xml:id="echoid-s1455" xml:space="preserve">Iſt das papier ſehr trocken, ſo findet die <lb/>elektriſche Materie in ihrem Uebergange mehr Widerſtand, <lb/>und das Loch iſt klein. </s>
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diff changeset
2873 <s xml:id="echoid-s1456" xml:space="preserve">Iſt der Theil des Papiers, durch <lb/>welchen die Eploſion geht, feucht, ſo iſt das Loch größer, <lb/>das Licht lebhafter und der Schlag lauter.</s>
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diff changeset
2874 <s xml:id="echoid-s1457" xml:space="preserve"/>
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diff changeset
2875 </p>
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diff changeset
2876 </div>
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2877 <div xml:id="echoid-div153" type="section" level="1" n="149">
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2878 <head xml:id="echoid-head165" xml:space="preserve">127. Verſuch.</head>
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2879 <p>
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2880 <s xml:id="echoid-s1458" xml:space="preserve">Die Entladung einer Batterie durch eine kleine ſtäh-<lb/>lerne Nadel wird, wenn die Ladung ſtark genug iſt, die <lb/>Nadel magnetiſch machen.</s>
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2881 <s xml:id="echoid-s1459" xml:space="preserve"/>
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diff changeset
2882 </p>
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diff changeset
2883 </div>
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2884 <div xml:id="echoid-div154" type="section" level="1" n="150">
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2885 <head xml:id="echoid-head166" xml:space="preserve">128. Verſuch.</head>
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2886 <p>
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2887 <s xml:id="echoid-s1460" xml:space="preserve">Die Entladung einer Batterie durch eine kleine und <lb/>dünne Magnetnadel wird ihr gemeiniglich die magnetiſche <lb/>Eigenſchaft ganz benehmen, bisweilen aber auch ihre Pole <lb/>umkehren. </s>
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2888 <s xml:id="echoid-s1461" xml:space="preserve">Soll dieſer Verſuch gelingen, ſo iſt es oft <lb/>nöthig, mehrere ſtarke Schläge durch die Nadel gehen
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2889 <pb o="90" file="0110" n="110" rhead="Achtes Capitel."/>
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diff changeset
2890 zu laſſen, ehe man ſie aus der Verbindung hinweg <lb/>nimmt.</s>
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2891 <s xml:id="echoid-s1462" xml:space="preserve"/>
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2892 </p>
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2893 <p>
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2894 <s xml:id="echoid-s1463" xml:space="preserve">Aus des P. </s>
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2895 <s xml:id="echoid-s1464" xml:space="preserve">Beccaria Verſuchen erhellet, daß die <lb/>magnetiſche Richtung, welche eine Nadel durch die Elek-<lb/>tricität erhält, von der Lage der Nadel beym Schlage ab-<lb/>hängt, und nicht auf die Richtung der elektriſchen Mate-<lb/>rie beym Eingange in die Nadel ankömmt.</s>
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2896 <s xml:id="echoid-s1465" xml:space="preserve"/>
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2897 </p>
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diff changeset
2898 </div>
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2899 <div xml:id="echoid-div155" type="section" level="1" n="151">
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2900 <head xml:id="echoid-head167" xml:space="preserve">129. Verſuch.</head>
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2901 <p>
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2902 <s xml:id="echoid-s1466" xml:space="preserve">Man entlade eine Batterie durch einen dünnen <lb/>Drath, der z. </s>
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2903 <s xml:id="echoid-s1467" xml:space="preserve">B. </s>
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2904 <s xml:id="echoid-s1468" xml:space="preserve">ein Funfzigtheilchen eines Zolles im <lb/>Durchmeſſer hat, ſo wird der Drath in Stücken zerbrochen <lb/>oder geſchmolzen werden, ſo daß er in glühenden Kügel-<lb/>chen herabfällt.</s>
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2905 <s xml:id="echoid-s1469" xml:space="preserve"/>
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2906 </p>
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2907 <p>
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2908 <s xml:id="echoid-s1470" xml:space="preserve">Wenn ein Drath auf dieſe Art geſchmolzen wird, ſo <lb/>fliegen häufige Funken bis auf eine beträchtliche Entfer-<lb/>nung herum, indem ſie durch die Exploſion nach allen <lb/>Richtungen ausgeworfen werden.</s>
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2909 <s xml:id="echoid-s1471" xml:space="preserve"/>
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2910 </p>
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2911 <p>
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2912 <s xml:id="echoid-s1472" xml:space="preserve">Iſt die Kraft der Batterie ſehr groß, ſo wird der <lb/>Drath durch die Stärke der Exploſion gänzlich zerſtreut. <lb/></s>
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2913 <s xml:id="echoid-s1473" xml:space="preserve">Kleine Stückchen ſolcher Subſtanzen, die ſich nicht leicht <lb/>in einen Drath ausziehen laſſen, als Platina, Goldkör-<lb/>ner, Erze @. </s>
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2914 <s xml:id="echoid-s1474" xml:space="preserve">kann man in Wachs drücken, und ſo in die <lb/>Verbindung bringen; </s>
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2915 <s xml:id="echoid-s1475" xml:space="preserve">geht nun ein Schlag von genugſa-<lb/>mer Stärke hindurch, ſo werden ſie geſchmolzen.</s>
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2916 <s xml:id="echoid-s1476" xml:space="preserve"/>
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2917 </p>
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2918 <p>
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2919 <s xml:id="echoid-s1477" xml:space="preserve">Die Kraft einer Batterie, Dräthe zu ſchmelzen, <lb/>ändert ſich mit der Länge der Verbindung, weil die elek-<lb/>triſche Materie deſto mehr Widerſtand antrift, je länger <lb/>der Weg iſt, durch welchen ſie gehen muß. </s>
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2920 <s xml:id="echoid-s1478" xml:space="preserve">D. </s>
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2921 <s xml:id="echoid-s1479" xml:space="preserve">prieſt-<lb/>ley konnte 9 Zoll dünnen eiſernen Drath in einer Entfer-<lb/>nung von 15 Fuß ſchmelzen, aber in der Entfernung von <lb/>20 Fuß konnte er nur 6 Zoll davon glühend machen.</s>
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2922 <s xml:id="echoid-s1480" xml:space="preserve"/>
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2923 </p>
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2924 </div>
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2925 <div xml:id="echoid-div156" type="section" level="1" n="152">
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2926 <head xml:id="echoid-head168" xml:space="preserve">130. Verſuch.</head>
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2927 <p>
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2928 <s xml:id="echoid-s1481" xml:space="preserve">Man ſchließe einen ſehr dünnen Drath in eine Glas-<lb/>@öhre ein, und entlade eine Batterie durch denſelben, ſo
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2929 <pb o="91" file="0111" n="111" rhead="Elektriſche Batterie und Lateralexploſion."/>
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2930 wird er in Kügelchen von verſchiedener Größe zertheilt, <lb/>welche man von der innern Fläche der Glasröhre zuſam-<lb/>menleſen kann. </s>
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2931 <s xml:id="echoid-s1482" xml:space="preserve">Man findet ſie oft hohl, und ſie ſind dann <lb/>nicht viel mehr, als eine Metallſchlacke.</s>
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2932 <s xml:id="echoid-s1483" xml:space="preserve"/>
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2933 </p>
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2934 <p>
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2935 <s xml:id="echoid-s1484" xml:space="preserve">Man hat viele Verſuche angeſtellt, um die verſchie-<lb/>denen leitenden Kräfte der Metalle durch den hindurchge-<lb/>laſſenen Schlag einer Batterie zu unterſuchen; </s>
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2936 <s xml:id="echoid-s1485" xml:space="preserve">allein man <lb/>hat noch nicht beſtimmen können, ob die größere Leichtig-<lb/>keit, mit welcher einige Metalle explodiren, von der Leich-<lb/>tigkeit des Durchgangs der elektriſchen Materie, oder von <lb/>dem Grade des Widerſtands, welchen ſie dem Durchgan-<lb/>ge dieſer Materie entgegenſetzen, oder von einem Mangel <lb/>an Ductilität, wodurch ſie der Ausdehnung unfähiger <lb/>werden, herkomme.</s>
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2937 <s xml:id="echoid-s1486" xml:space="preserve"/>
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2938 </p>
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2939 </div>
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2940 <div xml:id="echoid-div157" type="section" level="1" n="153">
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2941 <head xml:id="echoid-head169" xml:space="preserve">131. Verſuch.</head>
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2942 <p>
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2943 <s xml:id="echoid-s1487" xml:space="preserve">Man entlade eine Batterie durch eine Kette, wel-<lb/>che auf Papier liegt, ſo werden an den Stellen, wo die <lb/>Glieder der Kette einander berühren, ſchwarze Flecken auf <lb/>dem Papiere zurückbleiben; </s>
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2944 <s xml:id="echoid-s1488" xml:space="preserve">auch werden die Glieder an <lb/>dieſen Stellen mehr oder weniger geſchmolzen werden.</s>
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2945 <s xml:id="echoid-s1489" xml:space="preserve"/>
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2946 </p>
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2947 </div>
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2948 <div xml:id="echoid-div158" type="section" level="1" n="154">
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2949 <head xml:id="echoid-head170" xml:space="preserve">132. Verſuch.</head>
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2950 <p>
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2951 <s xml:id="echoid-s1490" xml:space="preserve">Man nehme zwey Stücken Fenſterglas, etwa 3 Zoll <lb/>lang und 2 Zoll breit, lege einen Streif Meſſing- oder <lb/>Goldblättchen zwiſchen beyde und laſſe die Blättchen auf <lb/>beyden Seiten vor dem Glaſe hervorragen; </s>
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2952 <s xml:id="echoid-s1491" xml:space="preserve">ſtelle die bey-<lb/>den Stücken Glas in die Preſſe des allgemeinen Ausla-<lb/>ders, bringe die beyden Enden der Dräthe E T, E F. <lb/></s>
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2953 <s xml:id="echoid-s1492" xml:space="preserve">Fig. </s>
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2954 <s xml:id="echoid-s1493" xml:space="preserve">33. </s>
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2955 <s xml:id="echoid-s1494" xml:space="preserve">an die Enden der Metallblättchen, und laſſe den <lb/>Schlag durch dieſelben gehen, ſo wird dieſer einen Theil <lb/>des Metalls in das Glas hineintreiben, und die Farbe deſ-<lb/>ſelben in etwas verändern. </s>
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2956 <s xml:id="echoid-s1495" xml:space="preserve">Das Metallblättchen muß in <lb/>der Mitte am ſchmälſten ſeyn, weil die Stärke der elek-<lb/>triſchen Materie ſich wie ihre Dichtigkeit verhält, welche
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2957 <pb o="92" file="0112" n="112" rhead="Achtes Capitel."/>
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2958 zunimmt, wenn eben dieſelbe Menge von Materie durch <lb/>weniger leitende Theile hindurchgedrängt wird.</s>
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2959 <s xml:id="echoid-s1496" xml:space="preserve"/>
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2960 </p>
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2961 <p>
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2962 <s xml:id="echoid-s1497" xml:space="preserve">Wenn die Streifen von Goldblättchen durch die <lb/>Exploſion geſchmolzen ſind, ſo werden ſie dadurch nicht-<lb/>leitend, und verlieren die Fähigkeit, nach dem erſten <lb/>Schlage noch einen zweyten durchzulaſſen. </s>
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2963 <s xml:id="echoid-s1498" xml:space="preserve">Einige Theil-<lb/>chen des Metalls werden in das Glas getrieben, welches <lb/>dadurch wirklich geſchmolzen wird; </s>
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2964 <s xml:id="echoid-s1499" xml:space="preserve">die am Glaſe anlie-<lb/>genden Theile des Metalls werden am vollkommenſten ge-<lb/>ſchnolzen. </s>
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2965 <s xml:id="echoid-s1500" xml:space="preserve">Die Stücken Glas, welche das Metallblätt-<lb/>chen bedecken, werden durch den Auslader gemeiniglich in <lb/>Stücken zerbrochen.</s>
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2966 <s xml:id="echoid-s1501" xml:space="preserve"/>
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2967 </p>
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2968 </div>
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2969 <div xml:id="echoid-div159" type="section" level="1" n="155">
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2970 <head xml:id="echoid-head171" xml:space="preserve">133. Verſuch.</head>
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2971 <p>
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2972 <s xml:id="echoid-s1502" xml:space="preserve">Man lege ein ſtarkes Stück Glas auf die elfenbei-<lb/>nerne Platte des allgemeinen Ausladers Taf. </s>
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2973 <s xml:id="echoid-s1503" xml:space="preserve">11. </s>
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2974 <s xml:id="echoid-s1504" xml:space="preserve">Fig. </s>
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2975 <s xml:id="echoid-s1505" xml:space="preserve">3, <lb/>auf das Glas ein ſtarkes Stück Elfenbein, und auf dieſes <lb/>ein Gewicht von 1 — 7 Pfund; </s>
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2976 <s xml:id="echoid-s1506" xml:space="preserve">bringe die Enden der <lb/>Dräthe E F, E T gegen den Rand des Glaſes, und laſſe den <lb/>Schlag durch die Dräthe gehen, indem man den einen derſel-<lb/>ben, z. </s>
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2977 <s xml:id="echoid-s1507" xml:space="preserve">B. </s>
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2978 <s xml:id="echoid-s1508" xml:space="preserve">E F, mit dem Hacken der Batterie C, Taf. </s>
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2979 <s xml:id="echoid-s1509" xml:space="preserve">IV. </s>
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2980 <s xml:id="echoid-s1510" xml:space="preserve">Fig. <lb/></s>
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2981 <s xml:id="echoid-s1511" xml:space="preserve">65, verbindet, und nach geladener Batterie eine Verbindung <lb/>zwiſchen der Kugel und dem Drathe E T macht, ſo wird <lb/>das Glas zerbrochen, und ein Theil davon in ein feines <lb/>Pulver zermalmet werden. </s>
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2982 <s xml:id="echoid-s1512" xml:space="preserve">Iſt das Glas ſtark genug, <lb/>dem Schlage zu widerſtehen, ſo wird es oft mit den ſchön-<lb/>ſten und lebhafteſten Farben bezeichnet. </s>
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2983 <s xml:id="echoid-s1513" xml:space="preserve">Herr Morgan <lb/>hat mich verſichert, daß die Wirkung eben dieſelbe ſey, <lb/>wenn das Glas von unten angeküttet wird; </s>
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2984 <s xml:id="echoid-s1514" xml:space="preserve">welche Me-<lb/>thode bey verſchiedenen Verſuchen noch ſchicklicher iſt.</s>
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2985 <s xml:id="echoid-s1515" xml:space="preserve"/>
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2986 </p>
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2987 </div>
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2988 <div xml:id="echoid-div160" type="section" level="1" n="156">
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2989 <head xml:id="echoid-head172" xml:space="preserve">134. Verſuch.</head>
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2990 <p>
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2991 <s xml:id="echoid-s1516" xml:space="preserve">Geht der Schlag unter dem Elfenbein mit den Ge-<lb/>wichten durch, ohne daß noch ein Glas zwiſchen demſel-<lb/>ben und der Tafel des allgemeinen Ausladers G H liegt, <lb/>ſo werden die Gewichte durch die Lateralkraft des Schla-
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2992 <pb o="93" file="0113" n="113" rhead="Elektriſche Batterie und Lateralexploſion."/>
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2993 ges auſgehoben. </s>
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2994 <s xml:id="echoid-s1517" xml:space="preserve">Die Anzahl der Gewichte muß mit der <lb/>Stärke der Exploſion im Verhältniß ſtehen.</s>
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2995 <s xml:id="echoid-s1518" xml:space="preserve"/>
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2996 </p>
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2997 </div>
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2998 <div xml:id="echoid-div161" type="section" level="1" n="157">
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2999 <head xml:id="echoid-head173" xml:space="preserve">135. Verſuch.</head>
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3000 <p>
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3001 <s xml:id="echoid-s1519" xml:space="preserve">Fig. </s>
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3002 <s xml:id="echoid-s1520" xml:space="preserve">66. </s>
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3003 <s xml:id="echoid-s1521" xml:space="preserve">a iſt ein iſolirter Stab, der eine geladene <lb/>Flaſche d beynahe berühret, b ein anderer iſolirter Stab, <lb/>nahe an den vorigen und in gerader Linie mit demſelben <lb/>geſtellet. </s>
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3004 <s xml:id="echoid-s1522" xml:space="preserve">Man entlade die Flaſche durch den Auslader <lb/>e, von welchem eine Kette herabhängt, welche den Boden <lb/>der Flaſche nicht berühret, ſo wird der Stab b einen elek-<lb/>triſchen Funken erhalten, welcher ihn aber faſt in eben <lb/>demſelben Augenblicke wieder verläßt, indem auch die <lb/>feinſten daran gehangenen Fäden durch dieſen Funken <lb/>nicht elektriſiret werden.</s>
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3005 <s xml:id="echoid-s1523" xml:space="preserve"/>
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3006 </p>
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3007 <p>
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3008 <s xml:id="echoid-s1524" xml:space="preserve">Dieſe elektriſche Erſcheinung, welche ſich ganz auſ-<lb/>ſerhalb der Verbindung der entladenen Flaſche äußert, <lb/>heiſt die Lateralerploſion.</s>
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3009 <s xml:id="echoid-s1525" xml:space="preserve"/>
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3010 </p>
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3011 <p>
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3012 <s xml:id="echoid-s1526" xml:space="preserve">Wenn man kleine Stücken Kork oder andere leichte <lb/>Körper in die Nähe einer geladenen Flaſche oder Batterie <lb/>bringet, ſo werden ſie bey der Entladung nach allen Rich-<lb/>tungen vom Mittelpunkte der Exploſion aus von ihrer <lb/>Stelle getrieben werden; </s>
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3013 <s xml:id="echoid-s1527" xml:space="preserve">und je ſtärker die Exploſion iſt, <lb/>deſto weiter werden ſie verſchoben. </s>
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3014 <s xml:id="echoid-s1528" xml:space="preserve">Es iſt daher nicht zu <lb/>verwundern, daß ſchwere Körper durch ſtarke Blitze bis <lb/>auf beträchtliche Entfernungen fortgeſchoben werden. </s>
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3015 <s xml:id="echoid-s1529" xml:space="preserve">D. <lb/></s>
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3016 <s xml:id="echoid-s1530" xml:space="preserve">prieſtley vermuthet, daß dieſe Art von Lateralwirkung <lb/>durch die Luft verurſachet werde, welche aus der Stelle, <lb/>durch die der elektriſche Schlag gehet, vertrieben wird.</s>
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3017 <s xml:id="echoid-s1531" xml:space="preserve"/>
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3018 </p>
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3019 <p>
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3020 <s xml:id="echoid-s1532" xml:space="preserve">Dieſe Lateralwirkung in der Nachbarſchaft eines <lb/>Schlags äußert ſich nicht allein, wenn der Schlag zwi-<lb/>ſchen zweyen Stücken Metall in freyer Luft entſtehet, ſon-<lb/>dern auch, wenn er durch Drath gehet, der nicht ſtark ge-<lb/>nug iſt, ihn vollkommen zu leiten. </s>
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3021 <s xml:id="echoid-s1533" xml:space="preserve">Je dünner der Drath, <lb/>und je ſtärker die Schmelzung iſt, deſto heftiger iſt auch <lb/>die Zerſtreuung leichter Körper um denſelben herum.</s>
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3022 <s xml:id="echoid-s1534" xml:space="preserve"/>
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3023 </p>
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3024 <pb o="94" file="0114" n="114" rhead="Achtes Capitel."/>
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3025 </div>
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3026 <div xml:id="echoid-div162" type="section" level="1" n="158">
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3027 <head xml:id="echoid-head174" xml:space="preserve">136. Verſuch.</head>
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3028 <p>
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3029 <s xml:id="echoid-s1535" xml:space="preserve">1. </s>
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3030 <s xml:id="echoid-s1536" xml:space="preserve">Wenn zwiſchen den beyden geladenen Flächen <lb/>einer elektriſchen Platte mehrere Verbindungen von ver-<lb/>ſchiedener Länge und aus verſchiedenen Materien gemacht <lb/>werden; </s>
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3031 <s xml:id="echoid-s1537" xml:space="preserve">ſo geht der Schlag durch diejenige Verbindung, <lb/>weiche aus den beſten Leitern beſteht, wie lang oder kurz <lb/>auch die übrigen ſeyn mögen.</s>
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3032 <s xml:id="echoid-s1538" xml:space="preserve"/>
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3033 </p>
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3034 <p>
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3035 <s xml:id="echoid-s1539" xml:space="preserve">2. </s>
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3036 <s xml:id="echoid-s1540" xml:space="preserve">Werden mehrere Verbindungen von einerley Ma-<lb/>terien, aber von verſchiedener Länge, gemacht, ſo geht der <lb/>Schlag durch die kürzeſte derſelben.</s>
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3037 <s xml:id="echoid-s1541" xml:space="preserve"/>
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3038 </p>
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3039 <p>
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3040 <s xml:id="echoid-s1542" xml:space="preserve">3. </s>
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3041 <s xml:id="echoid-s1543" xml:space="preserve">Sind die Verbindungen in aller Abſicht elnan-<lb/>der gleich, ſo geht der Schlag durch mehrere zu gleicher <lb/>Zeit.</s>
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3042 <s xml:id="echoid-s1544" xml:space="preserve"/>
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3043 </p>
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3044 <p>
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3045 <s xml:id="echoid-s1545" xml:space="preserve">Einer meiner Freunde hat mir erzählt, er habe oft <lb/>mehrere Verbindungen zu gleicher Zeit gemacht, um große <lb/>Flaſchen oder Batterien zu entladen. </s>
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3046 <s xml:id="echoid-s1546" xml:space="preserve">Wenn deren eine hin-<lb/>reichende Anzahl geweſen, ſo habe er ſich ſelbſt in eine der-<lb/>ſelben hineinſtellen, und ohne den geringſten Schaden An-<lb/>theil am Schlage nehmen können; </s>
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3047 <s xml:id="echoid-s1547" xml:space="preserve">die Empfindung ſey <lb/>ſogar nicht unangenehm geweſen, und er habe ſie durch <lb/>dieſes Mittel faſt bis zum Unmerklichen ſchwächen können.</s>
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3048 <s xml:id="echoid-s1548" xml:space="preserve"/>
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3049 </p>
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3050 </div>
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3051 <div xml:id="echoid-div163" type="section" level="1" n="159">
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3052 <head xml:id="echoid-head175" xml:space="preserve">137. Verſuch.</head>
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3053 <p>
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3054 <s xml:id="echoid-s1549" xml:space="preserve">Herr Henly machte eine doppelte Verbindung, die <lb/>erſte durch einen eiſernen Stab, der ein und einen halben <lb/>Zoll breit und einen halben Zoll dick war; </s>
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3055 <s xml:id="echoid-s1550" xml:space="preserve">die andere <lb/>durch eine vier und einen halben Schuh lange dünne Kette. <lb/></s>
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3056 <s xml:id="echoid-s1551" xml:space="preserve">Bey Entladung einer Flaſche von 500 Quadratzoll be-<lb/>legter Fläche gieng die Elektricität durch beyde Verbin-<lb/>dungen, und man ſahe an vielen Stellen der Kette Fun-<lb/>ken. </s>
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3057 <s xml:id="echoid-s1552" xml:space="preserve">Er entlud ferner drey Flaſchen, welche zuſammen <lb/>16 Quadratſchuh belegte Fläche enthielten, durch drey ver-<lb/>ſchiedene Ketten auf einmal, wie bey Fig. </s>
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3058 <s xml:id="echoid-s1553" xml:space="preserve">67, und man <lb/>ſahe in allen Ketten helle Funken. </s>
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diff changeset
3059 <s xml:id="echoid-s1554" xml:space="preserve">Die Ketten waren <lb/>von Eiſen und Meſſing, von ſehr verſchiedenen Längen;</s>
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3060 <s xml:id="echoid-s1555" xml:space="preserve">
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diff changeset
3061 <pb o="95" file="0115" n="115" rhead="Elektriſche Batterie uud Lateralexploſion."/>
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diff changeset
3062 die kürzeſte 10 — 12 Zoll, die längſte mehrere Schuhe lang. <lb/></s>
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3063 <s xml:id="echoid-s1556" xml:space="preserve">Wenn dieſe Flaſchen durch den vorerwähnten eiſernen <lb/>Stab, und zugleich durch eine dünne drey Viertel Yards <lb/>lange Kette entladen wurden, ſo war die ganze Kette er-<lb/>leuchtet, und durchaus mit den ſchönſten Stralen, wie mit <lb/>Borſten, oder mit goldnen Haaren, bedeckt. </s>
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3064 <s xml:id="echoid-s1557" xml:space="preserve">Er hatte <lb/>eine große Flaſche mit dem erſten Leiter in Berührung ge-<lb/>bracht, und eine eiſerne Kette an ihre Belegung gehangen, <lb/>welche mit einer Metallplatte verbunden war, in welche <lb/>der Schlag durch den Auslader übergieng; </s>
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3065 <s xml:id="echoid-s1558" xml:space="preserve">er hieng hier-<lb/>auf eine weit längere meſſingene Kette an die entgegenge-<lb/>ſetzte Seite der Flaſche, und ſtellte ihr Ende acht und <lb/>einen halben Zoll weit von der Metallplatte ab. </s>
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3066 <s xml:id="echoid-s1559" xml:space="preserve">An die-<lb/>ſes Ende legte er ein dünnes 8 Zoll langes Stäbgen von <lb/>Eichenholz, und beſtreute daſſelbe mit tannenen Sägſpä-<lb/>nen. </s>
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3067 <s xml:id="echoid-s1560" xml:space="preserve">Wenn er nun die Flaſchen durch die Platte entlud, <lb/>ſo leuchteten beyde Ketten ihrer ganzen Länge nach, ſo wie <lb/>auch die Sägſpäne, welche mit einem leuchtenden Streif <lb/>bedeckt waren, der ein ſehr ſchönes Schauſpiel darſtellte.</s>
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3068 <s xml:id="echoid-s1561" xml:space="preserve"/>
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3069 </p>
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3070 <p>
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3071 <s xml:id="echoid-s1562" xml:space="preserve">In den Glashütten findet man gemeiniglich eine <lb/>große Anzahl maſſiver Glasſtangen, die ohngefähr einen <lb/>Viertel Zoll im Durchmeſſer halten. </s>
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3072 <s xml:id="echoid-s1563" xml:space="preserve">Wenn man dieſe <lb/>Stangen genau unterſucht, ſo wird man viele davon durch <lb/>einen beträchtlichen Theil ihrer Länge hohl finden; </s>
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3073 <s xml:id="echoid-s1564" xml:space="preserve">doch <lb/>macht der Durchmeſſer der Höhlung ſelten mehr als ein <lb/>Zweyhunderttheilchen eines Zolles aus. </s>
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3074 <s xml:id="echoid-s1565" xml:space="preserve">Man ſondere den <lb/>hohlen Theil ab, und fülle ihn durch Saugen mit Queckſil-<lb/>ber, verhüte aber, daß vorher keine Feuchtigkeit hinein-<lb/>komme; </s>
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3075 <s xml:id="echoid-s1566" xml:space="preserve">ſo iſt die Röhre zu folgendem Verſuche zube-<lb/>reitet.</s>
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3076 <s xml:id="echoid-s1567" xml:space="preserve"/>
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3077 </p>
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3078 </div>
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3079 <div xml:id="echoid-div164" type="section" level="1" n="160">
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3080 <head xml:id="echoid-head176" xml:space="preserve">138. Verſuch.</head>
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3081 <p>
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3082 <s xml:id="echoid-s1568" xml:space="preserve">Man laſſe den elektriſchen Schlag durch dieſen <lb/>ſchmalen Queckſilberfaden gehen, ſo wird derſelbe augen-<lb/>blicklich zertheilet, und zerſchmettert oder ſplittert die Glas-<lb/>röhre auf eine ſonderbare Art.</s>
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3083 <s xml:id="echoid-s1569" xml:space="preserve"/>
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3084 </p>
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3085 <pb o="96" file="0116" n="116" rhead="Achtes Capitel."/>
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3086 </div>
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3087 <div xml:id="echoid-div165" type="section" level="1" n="161">
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3088 <head xml:id="echoid-head177" xml:space="preserve">139. Verſuch.</head>
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3089 <p>
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3090 <s xml:id="echoid-s1570" xml:space="preserve">Man nehme eine Glasröhre, deren Weite im Lich-<lb/>ten etwa einen Viertel Zoll beträgt, fülle ſie mit Waſſer, <lb/>verſtopfe die Enden mit Kork, ſtecke durch die Korke <lb/>zween Dräthe in die Röhre, ſo daß ihre Enden beynahe <lb/>zuſammen kommen, und bringe die äußern Enden derſelben <lb/>in die Verbindung beyder Seiten einer Batterie; </s>
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3091 <s xml:id="echoid-s1571" xml:space="preserve">ſo wird <lb/>ſich bey der Entladung das Waſſer nach allen Richtun-<lb/>gen zerſtreuen, und die Röhre durch den Schlag in Stü-<lb/>cken zerbrochen werden.</s>
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3092 <s xml:id="echoid-s1572" xml:space="preserve"/>
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3093 </p>
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3094 <p>
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3095 <s xml:id="echoid-s1573" xml:space="preserve">Die elektriſche Materie verwandlet eben ſo, wie das <lb/>gemeine Feuer, das Waſſer in einen höchſt elaſtiſchen <lb/>Dampf. </s>
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3096 <s xml:id="echoid-s1574" xml:space="preserve">D. </s>
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3097 <s xml:id="echoid-s1575" xml:space="preserve">Franklin, der obigen Verſuch mit Dinte <lb/>anſtellte, konnte nicht den geringſten Flecken auf dem Pa-<lb/>piere wahrnehmen, auf welchem die Röhre gelegen hatte. <lb/></s>
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3098 <s xml:id="echoid-s1576" xml:space="preserve">Beccaria ließ den Schlag durch einen Waſſertropfen ge-<lb/>hen, der mitten in einer ſtarken gläſernen Kugel zwiſchen <lb/>den Enden zweener eiſernen Dräthe ſchwebte, und die <lb/>Kugel ward durch die Exploſion in Stücken zerbrochen. </s>
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3099 <s xml:id="echoid-s1577" xml:space="preserve">Er <lb/>baute auf dieſen Grund die Erfindung des ſogenannten <lb/>elektriſchen Mörſers, welcher eine kleine Bleykugel auf <lb/>20 Schuh weit forttreibt. </s>
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3100 <s xml:id="echoid-s1578" xml:space="preserve">Aus verſchiedenen der vori-<lb/>gen Verſuche erhellet, daß die elektriſche Materie die <lb/>Theile der widerſtehenden Subſtanzen, durch welche ſie <lb/>gehet, nach allen Richtungen zu zerſtreuen ſucht.</s>
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3101 <s xml:id="echoid-s1579" xml:space="preserve"/>
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3102 </p>
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3103 </div>
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3104 <div xml:id="echoid-div166" type="section" level="1" n="162">
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3105 <head xml:id="echoid-head178" xml:space="preserve">140. Verſuch.</head>
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3106 <p>
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3107 <s xml:id="echoid-s1580" xml:space="preserve">Man ſtelle ein Haus, aus kleinen Hölzern locker er-<lb/>baut, auf einem feuchten Brete mitten in ein großes Ge-<lb/>fäß voll Waſſer, und laſſe den elektriſchen Schlag einer <lb/>Batterie über das Bret, oder über das Waſſer, oder <lb/>über beyde, gehen, ſo wird das Waſſer ſtark in Bewe-<lb/>gung gerathen, und das Haus umgeworfen werden. </s>
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3108 <s xml:id="echoid-s1581" xml:space="preserve">Auch <lb/>iſt der Schall ſtärker, als wenn die Exploſion bloß durch <lb/>die Luft gehet. </s>
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3109 <s xml:id="echoid-s1582" xml:space="preserve">Die elektriſche Materie ſtrebt nahe an
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3110 <pb o="97" file="0117" n="117" rhead="Elektriſche Batterie und Lateralexploſion."/>
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3111 der Oberfläche des Waſſers hinzugehen, wo ſie mehr Wi-<lb/>derſtand antrift, als wenn ſie durch das Waſſer wäre hin-<lb/>durchgetrieben worden. </s>
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3112 <s xml:id="echoid-s1583" xml:space="preserve">Dies kömmt zum Theil auch da-<lb/>von her, daß die elektriſche Materie ein Vermögen beſitzt, <lb/>einen elaſtiſchen Dampf aus dem Waſſer zu erzeugen, der <lb/>die umliegende Luft aus der Stelle treibt.</s>
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3113 <s xml:id="echoid-s1584" xml:space="preserve"/>
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3114 </p>
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3115 <p>
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3116 <s xml:id="echoid-s1585" xml:space="preserve">Ein über ein Stück Eis geleiteter Schlag läßt auf <lb/>demſelben kleine ungleiche Löcher zurück, als ob eine er-<lb/>wärmte Kette darauf wäre gelegt worden.</s>
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3117 <s xml:id="echoid-s1586" xml:space="preserve"/>
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3118 </p>
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3119 <p>
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3120 <s xml:id="echoid-s1587" xml:space="preserve">Ein Schlag, der durch ein grünes Blatt gehet, zer-<lb/>reißt die Oberfläche deſſelben in verſchiedenen Richtungen, <lb/>und ſtellt mancherley Wirkungen des Blitzes im Kleinen <lb/>dar. </s>
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3121 <s xml:id="echoid-s1588" xml:space="preserve">Ueber Weingeiſt geht der Schlag bis auf eine ge-<lb/>wiſſe Weite, ohne ihn zu entzünden; </s>
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3122 <s xml:id="echoid-s1589" xml:space="preserve">wird aber die Weite <lb/>größer, ſo ſetzt @@ ihn in Flammen. </s>
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3123 <s xml:id="echoid-s1590" xml:space="preserve">Man ſieht hieraus, <lb/>daß die Leichtigkeit, mit welcher ſich die elektriſche Mate-<lb/>rie über die Oberfläche feuchter Körper leiten läßt, von <lb/>ihrer Fähigkeit in Dünſte verwandelt zu werden, abhängt.</s>
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3124 <s xml:id="echoid-s1591" xml:space="preserve"/>
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3125 </p>
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3126 <p>
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3127 <s xml:id="echoid-s1592" xml:space="preserve">Wenn der Schlag die Theilchen der Metalle ſchmel-<lb/>zet, ſo treibt er die leitenden Dämpfe, welche von ihnen <lb/>aufſteigen, mit ſich fort; </s>
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3128 <s xml:id="echoid-s1593" xml:space="preserve">und je leichter ſich die Theile <lb/>eines Körpers in Dampf oder Staub verwandeln laſſen, <lb/>deſto weiter geht der Schlag.</s>
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3129 <s xml:id="echoid-s1594" xml:space="preserve"/>
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3130 </p>
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3131 </div>
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3132 <div xml:id="echoid-div167" type="section" level="1" n="163">
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3133 <head xml:id="echoid-head179" xml:space="preserve">141. Verſuch.</head>
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3134 <p>
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3135 <s xml:id="echoid-s1595" xml:space="preserve">Wenn ein Drath durch Gewichte ausgedehnt, und <lb/>durch einen elektriſchen Schlag glühend gemacht wird, ſo <lb/>findet man ihn nach dem Schlage beträchtlich verlängert. <lb/></s>
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3136 <s xml:id="echoid-s1596" xml:space="preserve">Iſt der Drath locker, ſo ſoll er, wie man behaupten will, <lb/>durch den Schlag verkürzt werden.</s>
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3137 <s xml:id="echoid-s1597" xml:space="preserve"/>
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3138 </p>
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3139 </div>
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3140 <div xml:id="echoid-div168" type="section" level="1" n="164">
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3141 <head xml:id="echoid-head180" xml:space="preserve">142. Verſuch.</head>
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3142 <p>
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3143 <s xml:id="echoid-s1598" xml:space="preserve">Wenn man ein langes und enges Gefäß mit Waſſer <lb/>zu einem Theile der Verbindung bey dem Entladen einer <lb/>Batterie macht, und jemand ſeine Hand während der
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3144 <pb o="98" file="0118" n="118" rhead="Achtes Capitel."/>
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3145 Exploſion unter das Waſſer taucht, ſo wird er eine ſon-<lb/>derbare Erſchütterung im Waſſer fühlen, die von der <lb/>Empfindung des elektriſchen Schlages ſehr verſchieden iſt. <lb/></s>
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3146 <s xml:id="echoid-s1599" xml:space="preserve">Der ſchnelle Stoß von dem Zurückprallen der Luft und des <lb/>Dampfes theilet ſich durch das Waſſer der Hand mit, und <lb/>ſie erhält daher eine Erſchütterung, welche derjenigen ähn-<lb/>lich iſt, die ein Schiff auf der See bey einem Erdbeben <lb/>empfindet.</s>
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3147 <s xml:id="echoid-s1600" xml:space="preserve"/>
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3148 </p>
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3149 </div>
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3150 <div xml:id="echoid-div169" type="section" level="1" n="165">
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3151 <head xml:id="echoid-head181" xml:space="preserve">143. Verſuch.</head>
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3152 <p>
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3153 <s xml:id="echoid-s1601" xml:space="preserve">Man ſtelle ein plattes Stück Metall zwiſchen die <lb/>Spitzen des allgemeinen Ausladers, und laſſe mehrere <lb/>Schläge aus einer Batterie durch die Dräthe gehen, ſo <lb/>werden ſie nach und nach auf dem Metalle verſchiedene <lb/>Kreiſe bilden, welche die ſchönſten priſmatiſchen Farben <lb/>zeigen. </s>
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3154 <s xml:id="echoid-s1602" xml:space="preserve">Dieſe Kreiſe erſcheinen deſto eher und ſtehen de-<lb/>ſto dichter an einander, je näher die Spitze an der Ober-<lb/>fläche des Metalls ſtehet. </s>
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3155 <s xml:id="echoid-s1603" xml:space="preserve">Die Anzahl der Ringe oder <lb/>Kreiſe, hängt von der Schärfe der Spitze ab; </s>
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3156 <s xml:id="echoid-s1604" xml:space="preserve">deswegen <lb/>geht der Verſuch beſſer von ſtatten, wenn man an die eine <lb/>Spitze des Ausladers eine ſpitzige Nadel befeſtiget.</s>
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3157 <s xml:id="echoid-s1605" xml:space="preserve"/>
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3158 </p>
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3159 <p>
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3160 <s xml:id="echoid-s1606" xml:space="preserve">D. </s>
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3161 <s xml:id="echoid-s1607" xml:space="preserve">Watſon und andere haben viele ſehr merkwür-<lb/>dige Verſuche angeſtellt, um die Entfernung, bis auf <lb/>welche der elektriſche Schlag geführt werden kan, und die <lb/>Geſchwindigkeit, mit welcher er ſich bewegt, zu beſtim-<lb/>men. </s>
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3162 <s xml:id="echoid-s1608" xml:space="preserve">Bey Watſons erſtem Verſuche ward durch elek-<lb/>triſche Materie, welche durch die Themſe geführt war, ein <lb/>Schlag gegeben und Weingeiſt angezündet. </s>
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3163 <s xml:id="echoid-s1609" xml:space="preserve">Beym fol-<lb/>genden Verſuche leitete man die elektriſche Materie durch <lb/>eine Verbindung von zwo Meilen, welche den New-river <lb/>zweymal kreuzte, und über viele Sandgruben und weite <lb/>Felder gieng. </s>
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3164 <s xml:id="echoid-s1610" xml:space="preserve">Er ward hierauf durch eine vier Meilen <lb/>lange Verbindung geleitet. </s>
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3165 <s xml:id="echoid-s1611" xml:space="preserve">Durch dieſe Räume gieng <lb/>er, ſo viel man bemerken konnte, in einem Augenblicke. <lb/></s>
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3166 <s xml:id="echoid-s1612" xml:space="preserve">Dieſe augenblickliche Entladung ward dadurch auſſer allen <lb/>Zweifel geſetzt, daß ein Beobachter, der ſich mit der ge-
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3167 <pb o="99" file="0119" n="119" rhead="Elektriſche Batterie und Lateralexploſion."/>
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3168 ladenen Flaſche in einerley Zimmer, zugleich aber in der <lb/>Mitte einer Verbindung von zwo Meilen befand, denSchlag <lb/>in eben dem Augenblicke empfand, in welchem er die Fla-<lb/>ſche ſich entladen ſahe.</s>
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3169 <s xml:id="echoid-s1613" xml:space="preserve"/>
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3170 </p>
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3171 <p>
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3172 <s xml:id="echoid-s1614" xml:space="preserve">Dieſer erſtaunenswürdigen Geſchwindigkeit ungeach-<lb/>tet, iſt es doch gewiß, daß man beyde Seiten einer gelade-<lb/>nen Flaſche, ſogar durch die beſten Leiter, ſo ſchnell be-<lb/>rühren kan, daß nicht alle elektriſche Materie Zeit hat, den <lb/>Umlauf zu macheu, und die Flaſche nur halb entladen <lb/>wird. </s>
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3173 <s xml:id="echoid-s1615" xml:space="preserve">Es giebt auch verſchiedene Beyſpiele, in welchen <lb/>die Bewegung langſam ſcheint, welches ſich mit jener un-<lb/>ermeßlichen Geſchwindigkeit nicht leicht vereinigen läßt; <lb/></s>
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3174 <s xml:id="echoid-s1616" xml:space="preserve">es iſt alſo gewiß, daß die elektriſche Materie bey ihrent <lb/>Durchgange durch oder über die Körper, Widerſtand <lb/>leidet.</s>
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3175 <s xml:id="echoid-s1617" xml:space="preserve"/>
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3176 </p>
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3177 <p>
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3178 <s xml:id="echoid-s1618" xml:space="preserve">Dennoch verſchwindet das Unbegreifliche der erzähl-<lb/>ten Verſuche gänzlich, wenn wir den Gedanken des Herrn <lb/>Volta über dieſe Materie Beyfall geben. </s>
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3179 <s xml:id="echoid-s1619" xml:space="preserve">Man wird <lb/>auch die Muthmaſſungen dieſes Gelehrten durch den 118. <lb/></s>
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3180 <s xml:id="echoid-s1620" xml:space="preserve">119. </s>
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3181 <s xml:id="echoid-s1621" xml:space="preserve">und 120. </s>
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3182 <s xml:id="echoid-s1622" xml:space="preserve">Verſuch beſtätiget finden, welche ſich ur-<lb/>ſprünglich vom Herrn Atwood herſchreiben; </s>
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3183 <s xml:id="echoid-s1623" xml:space="preserve">ob man <lb/>gleich geſtehen muß, daß dieſe Verſuche noch viel weiter <lb/>führen, und von der Richtung der elektriſchen Materie bey <lb/>der Entladung der leidner Flaſche einen Begriff geben, <lb/>der von der angenommenen Theorie gänzlich verſchieden iſt.</s>
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3184 <s xml:id="echoid-s1624" xml:space="preserve"/>
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3185 </p>
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3186 <p>
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3187 <s xml:id="echoid-s1625" xml:space="preserve">Folgendes iſt ein Auszug aus einer ſehr weitläufti-<lb/>gen Abhandlung des Herrn Volta, im Journal de phy-<lb/>ſique vom Jahre 1779.</s>
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3188 <s xml:id="echoid-s1626" xml:space="preserve"/>
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3189 </p>
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3190 <p>
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3191 <s xml:id="echoid-s1627" xml:space="preserve">Man nehine an, daß a, b, c, d, e, f, g, h, i, <lb/>k, l, m, n, o die Hände zuſammen geben, daß a die äußere <lb/>Seite einer geladenen leidner Flaſche, und o ihren Knopf <lb/>berühre. </s>
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3192 <s xml:id="echoid-s1628" xml:space="preserve">In dem Augenblicke, in welchem o die elektri-<lb/>ſche Materie aus der innern Seite durch den Knopf erhält, <lb/>wird a der äuſſern Seite etwas von ſeinem natürlichen <lb/>Vorrathe abgeben, ohne erſt zu erwarten, bis die aus <lb/>der innern Seite kommende Materie von o, durch n, m
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3193 <pb o="100" file="0120" n="120" rhead="Achtes Capitel."/>
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3194 u. </s>
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3195 <s xml:id="echoid-s1629" xml:space="preserve">ſ. </s>
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3196 <s xml:id="echoid-s1630" xml:space="preserve">w. </s>
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3197 <s xml:id="echoid-s1631" xml:space="preserve">zu ihm komme. </s>
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3198 <s xml:id="echoid-s1632" xml:space="preserve">Mittlerweile wird der Verluſt, <lb/>den a leidet, von b erſetzt, b erhält wiederum Materie <lb/>von c u. </s>
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3199 <s xml:id="echoid-s1633" xml:space="preserve">ſ. </s>
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3200 <s xml:id="echoid-s1634" xml:space="preserve">w. </s>
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3201 <s xml:id="echoid-s1635" xml:space="preserve">Zwar iſt es, wenn wir blos auf die Rich-<lb/>tung der Materie ſehen, immer nur ein einziger Strom, der <lb/>an beyden Enden zugleich entſteht, und ſich in eben den-<lb/>ſelben Zeitmomenten fortbewegt; </s>
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3202 <s xml:id="echoid-s1636" xml:space="preserve">obgleich derſelbe, wenn <lb/>man ſich genauer ausdrücken will, aus zween in einen ver-<lb/>einigten Strömen beſteht. </s>
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3203 <s xml:id="echoid-s1637" xml:space="preserve">Wenn die auſſerordentliche <lb/>Geſchwindigkeit, mit welcher die Materie fortgeht, uns <lb/>nicht verhinderte, die Zeitfolge der Erſchütterungen bey den <lb/>verſchiedenen Perſonen, welche die Kette machen, zu be-<lb/>merken, ſo würden wir finden, daß dieſe Erſchütterungen <lb/>nicht in der Ordnung o, n, l, m fortgehen, ſondern <lb/>daß ſie zu gleicher Zeit, zuerſt an den beyden Enden o und <lb/>a, dann bey n und b, hierauf bey m und c u. </s>
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3204 <s xml:id="echoid-s1638" xml:space="preserve">ſ. </s>
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3205 <s xml:id="echoid-s1639" xml:space="preserve">f. </s>
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3206 <s xml:id="echoid-s1640" xml:space="preserve">gefühlt <lb/>werden, und immer mehr nach dem Mittel der Kette zu <lb/>gehen. </s>
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3207 <s xml:id="echoid-s1641" xml:space="preserve">Dem zu folge fühlen bey einer kleinen Flaſche die-<lb/>jenigen, welche am weitſten von den Enden abſtehen, den <lb/>Schlag deſto ſchwächer, je länger die gemachte Verbin-<lb/>dung iſt.</s>
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3208 <s xml:id="echoid-s1642" xml:space="preserve"/>
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3209 </p>
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3210 <p>
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3211 <s xml:id="echoid-s1643" xml:space="preserve">Um dieſe Erklärung deutlicher zu machen, trenne <lb/>man die Kette, und mache auf einem trocknen Boden zwo <lb/>Reihen, a, b, c, d — e, f, g, h, welche in der <lb/>Mitte unterbrochen ſind; </s>
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3212 <s xml:id="echoid-s1644" xml:space="preserve">d berühre die Flaſche an der <lb/>äußern Seite, und e errege den Schlag durch Berührung <lb/>des Knopfs. </s>
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3213 <s xml:id="echoid-s1645" xml:space="preserve">Wenn nun die elektriſche Materie den kür-<lb/>zeſten Weg nehmen ſollte, um in die äußere negative Flä-<lb/>che zu gelangen, ſo müßte ſie in den Fuß der Perſon e her-<lb/>ab, über den Boden in den Fuß von d, und durch des <lb/>letztern Körper in die äußere Seite kommen, ohne auf f, <lb/>g, h zu wirken, welche alsdann ganz außer der Verbin-<lb/>dung ſtehen würden. </s>
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3214 <s xml:id="echoid-s1646" xml:space="preserve">Allein ſie geht, dieſer Voraus-<lb/>ſetzung ganz entgegen, aus dieſem geraden Wege heraus, <lb/>und folgt der Ordnung der leitenden Perſonen, die ihr <lb/>einen ſchicklichen Leitfaden giebt, um durch einen andern <lb/>Weg in die äußere Seite zu kom@en. </s>
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3215 <s xml:id="echoid-s1647" xml:space="preserve">Die von der in-
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3216 <pb o="101" file="0121" n="121" rhead="Elektriſche Batterie und Lateralexploſion."/>
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3217 nern Seite von e durch f, g, h gehende Materie giebt <lb/>dieſen Perſonen einen merklichen Schlag in den Händen <lb/>und Knöcheln, zeigt ſich, wenn die Hände und Füße ein <lb/>wenig vo@ einander abſtehen, durch einen Funken, und zer-<lb/>ſtreut ſich endlich in die Erde, als das allgemeine Behält-<lb/>niß der elektriſchen Materie. </s>
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3218 <s xml:id="echoid-s1648" xml:space="preserve">Eben ſo erhält d, welcher <lb/>die Materie zuerſt an die äußere Seite abgiebt, ſeinen <lb/>Verluſt durch c, b, a wieder, welche ihren Erſatz aus <lb/>dem Boden erhalten. </s>
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3219 <s xml:id="echoid-s1649" xml:space="preserve">Der Strom alſo, welcher aus dem <lb/>Knopfe der Flaſche kömmt, geht durch die leitenden Kör-<lb/>per, und verliert ſich in dem Erdboden; </s>
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3220 <s xml:id="echoid-s1650" xml:space="preserve">aus dieſem hin-<lb/>gegen kömmt eine zureichende Menge neuer elektriſcher <lb/>Materie hervor, und erſetzt den in der äußern Fläche be-<lb/>findlichen Mangel.</s>
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3221 <s xml:id="echoid-s1651" xml:space="preserve"/>
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3222 </p>
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3223 <p>
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3224 <s xml:id="echoid-s1652" xml:space="preserve">Wenn f, g, h keine Kette machen, ſondern ſich <lb/>ohne regelmäßige Ordnung um e herumſtellen, ſo ſieht <lb/>man den poſitiven Theil des Stroms ſich auf verſchiedene <lb/>Seiten verbreiten, und den Boden, in mehrere Ströme <lb/>vertheilt, erreichen. </s>
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3225 <s xml:id="echoid-s1653" xml:space="preserve">Auf eben dieſe Art geht die elektri-<lb/>ſche Materie aus dem Boden in d über, wenn a, b und e <lb/>unregelmäßig um d herumgeſtellt ſind; </s>
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3226 <s xml:id="echoid-s1654" xml:space="preserve">daß alſo jede Flä-<lb/>che ihren eignen Strom erregt, von welchen der eine in die <lb/>Flaſche hinein, der andere aus derſelben herausgeht. </s>
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3227 <s xml:id="echoid-s1655" xml:space="preserve">Eben <lb/>ſo war es bey dem vorhererwähnten Verſuche des D. <lb/></s>
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3228 <s xml:id="echoid-s1656" xml:space="preserve">Watſon, wobey man ſonſt annahm, daß die elektriſche <lb/>Materie die erſtaunenswürdigſten Umwege, durch Flüſſe, <lb/>über Felder u. </s>
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3229 <s xml:id="echoid-s1657" xml:space="preserve">dgl. </s>
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3230 <s xml:id="echoid-s1658" xml:space="preserve">nehme. </s>
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3231 <s xml:id="echoid-s1659" xml:space="preserve">Die Materie aus der innern <lb/>Seite zerſtreute ſich durch den Fluß in dem Augenblicke, <lb/>in welchem die äußere Seite aus eben dieſer Quelle den <lb/>Vorrath zog, der ihren Mangel erſetzen mußte.</s>
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3232 <s xml:id="echoid-s1660" xml:space="preserve"/>
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3233 </p>
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3234 <p>
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3235 <s xml:id="echoid-s1661" xml:space="preserve">Man ſieht auch aus andern Verſuchen, daß die eine <lb/>Seite eines geladenen elektriſchen Körpers mehr von der <lb/>einen Kraft enthalten könne, als gerade hinreichend iſt, <lb/>um der entgegengeſetzten Kraft auf der andern Seite das <lb/>Gleichgewicht zu halten. </s>
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3236 <s xml:id="echoid-s1662" xml:space="preserve">Denn, wenn eine geladene Fla-<lb/>ſche iſoliret, und durch einen Auslader mit einem gläſer-
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3237 <pb o="102" file="0122" n="122" rhead="Achtes Capitel."/>
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3238 nen Handgriff entladen wird, ſo werden, nach dem Schla-<lb/>ge, der Auslader und beyde Seiten der Flaſche die entge-<lb/>gengeſetzte Kraft von derjenigen haben, welche an der vor <lb/>dem Schlage zuletzt berührten Seite der Flaſche ſtatt fand.</s>
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3239 <s xml:id="echoid-s1663" xml:space="preserve"/>
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3240 </p>
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3241 <p>
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3242 <s xml:id="echoid-s1664" xml:space="preserve">Es wird nicht unſchicklich ſeyn, hier eine Hypotheſe <lb/>einzuſchalten, welche man dem Publikum anſtatt der an-<lb/>genommenen Theorie hat vorſchlagen wollen.</s>
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3243 <s xml:id="echoid-s1665" xml:space="preserve"/>
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3244 </p>
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3245 </div>
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3246 <div xml:id="echoid-div170" type="section" level="1" n="166">
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3247 <head xml:id="echoid-head182" xml:space="preserve">Hypotheſe.</head>
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3248 <p>
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3249 <s xml:id="echoid-s1666" xml:space="preserve">1) In allen Körpern ſind beyde elektriſche Kräfte <lb/>zugleich vorhanden.</s>
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3250 <s xml:id="echoid-s1667" xml:space="preserve"/>
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3251 </p>
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3252 <p>
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3253 <s xml:id="echoid-s1668" xml:space="preserve">2) Da ſie in dieſer Verbindung einander aufheben, <lb/>ſo kan man ſie den Sinnen nicht anders fühlbar machen, <lb/>als durch ihre Trennung.</s>
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3254 <s xml:id="echoid-s1669" xml:space="preserve"/>
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3255 </p>
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3256 <p>
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3257 <s xml:id="echoid-s1670" xml:space="preserve">3) In nicht – elektriſchen Körpern werden dieſe bey-<lb/>den Kräfte durch das Reiben an elektriſchen Körpern, oder <lb/>durch die Verbindung mit geriebenen elektriſchen getrennt.</s>
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3258 <s xml:id="echoid-s1671" xml:space="preserve"/>
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3259 </p>
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3260 <p>
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3261 <s xml:id="echoid-s1672" xml:space="preserve">4) In elektriſchen Körpern können dieſe Kräfte nicht <lb/>getrennt werden.</s>
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3262 <s xml:id="echoid-s1673" xml:space="preserve"/>
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3263 </p>
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3264 <p>
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3265 <s xml:id="echoid-s1674" xml:space="preserve">5) Die beyden Elektricitäten ziehen einander durch <lb/>die Subſtanz elektriſcher Körper ſtark an.</s>
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3266 <s xml:id="echoid-s1675" xml:space="preserve"/>
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3267 </p>
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3268 <p>
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3269 <s xml:id="echoid-s1676" xml:space="preserve">6) Elektriſche Körper laſſen ſich von den beyden <lb/>Elektricitäten nicht durchdringen.</s>
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3270 <s xml:id="echoid-s1677" xml:space="preserve"/>
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3271 </p>
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3272 <p>
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3273 <s xml:id="echoid-s1678" xml:space="preserve">7) Beyde Kräfte, wenn ſie an elektriſirte Körper <lb/>gebracht werden, ſtoßen die Kräfte von eben derſelben Art <lb/>zurück, und ziehen die entgegengeſetzten Kräfte an.</s>
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3274 <s xml:id="echoid-s1679" xml:space="preserve"/>
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3275 </p>
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3276 <pb o="103" file="0123" n="123"/>
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3277 </div>
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3278 <div xml:id="echoid-div171" type="section" level="1" n="167">
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3279 <head xml:id="echoid-head183" xml:space="preserve">Neuntes Capitel.</head>
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3280 <head xml:id="echoid-head184" xml:space="preserve">Von der Wirkung der zugeſpitzten Ableiter an den <lb/>Gebäuden.</head>
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3281 <p>
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3282 <s xml:id="echoid-s1680" xml:space="preserve">Die Wichtigkeit und der große Einfluß der Elektricität <lb/>zeigt ſich immer mehr, je näher wir mit ihr bekannt <lb/>werden. </s>
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3283 <s xml:id="echoid-s1681" xml:space="preserve">Wir finden keinen Körper in der Natur, auf <lb/>den ſie nicht, entweder als auf einen Leiter, oder als auf <lb/>einen elektriſchen Körper, wirkte; </s>
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3284 <s xml:id="echoid-s1682" xml:space="preserve">und wir entdecken, daß <lb/>die erſtaunenswürdigen Phänomene des Donners und Bli-<lb/>tzes aus ihr entſtehen, und mit ihr von einerley Natur ſind. <lb/></s>
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3285 <s xml:id="echoid-s1683" xml:space="preserve">Man hatte noch ſehr wenig Fortgang in der Lehre von der <lb/>Elektricität gemacht, als die Aehnlichkeit zwiſchen dem <lb/>elektriſchen Funken und dem Blitze entdeckt ward; </s>
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3286 <s xml:id="echoid-s1684" xml:space="preserve">der <lb/>große Gedanke, dieſe Muthmaßungen auszuführen und zu <lb/>beweiſen, daß das Feuer, welches vom Himmel herab-<lb/>blitzt, eben dasjenige ſey, welches bey unſern Verſuchen <lb/>die Exploſion und den Schlag verurſacht, entſtand bey <lb/>dem D. </s>
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3287 <s xml:id="echoid-s1685" xml:space="preserve">Franklin, der auch zuerſt den Nutzen der zuge-<lb/>ſpitzten metalliſchen Ableiter zur Beſchützung der Gebäu-<lb/>de vor den fürchterlichen Wirkungen des Blitzes, angab; </s>
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3288 <s xml:id="echoid-s1686" xml:space="preserve"><lb/>einen Gedanken, der mit allgemeinem Beyfall und Bewun-<lb/>derung aufgenommen wurde. </s>
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3289 <s xml:id="echoid-s1687" xml:space="preserve">Es haben ſich aber ſeit die-<lb/>ſer Zeit viele Naturforſcher verleiten laſſen, ihre Meinung <lb/>von dem Nutzen dieſer Ableiter zu ändern; </s>
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3290 <s xml:id="echoid-s1688" xml:space="preserve">und unter den <lb/>Kennern iſt geſtritten worden, ob man den zugeſpitzten <lb/>oder den ſtumpfgeendeten Ableitern den Vorzug zu geben <lb/>habe.</s>
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3291 <s xml:id="echoid-s1689" xml:space="preserve"/>
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3292 </p>
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3293 <p>
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3294 <s xml:id="echoid-s1690" xml:space="preserve">Die Verſuche, welche man hierüber angeſtellt hak, <lb/>ſind zwar ſehr zahlreich, ſie ſcheinen mir aber größtentheils <lb/>nicht viel zu beweiſen, und zeigen die Sache nur aus einem <lb/>ſehr eingeſchränkten Geſichtspunkte.</s>
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3295 <s xml:id="echoid-s1691" xml:space="preserve"/>
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3296 </p>
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3297 <pb o="104" file="0124" n="124" rhead="Neuntes Capitel."/>
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3298 <p>
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3299 <s xml:id="echoid-s1692" xml:space="preserve">Ein zugeſpitzter und mit der Erde verbundener Ab-<lb/>leiter hat nicht etwa eine beſondere Kraft, die Elektricität <lb/>an ſich zu ziehen, ſondern er wirkt blos wie jede andere <lb/>leitende Subſtanz, welche dem Durchgange der elektriſchen <lb/>Materie nicht widerſteht.</s>
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3300 <s xml:id="echoid-s1693" xml:space="preserve"/>
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3301 </p>
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3302 <p>
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3303 <s xml:id="echoid-s1694" xml:space="preserve">Zwar geht die Elektricität freylich aus einem elektri-<lb/>ſirten Körper weit leichter in einen zugeſpitzten, als in ei-<lb/>nen platt oder kugelförmig geendeten Ableiter über; </s>
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3304 <s xml:id="echoid-s1695" xml:space="preserve">weil <lb/>die Elaſticität der elektriſchen Materie und ihre Kraft die <lb/>Luft zu durchbrechen, durch die platte Oberfläche geſchwächt <lb/>wird, welche eine entgegengeſetzte Elektricität annimmt, <lb/>und die Intenſität der elektriſchen Materie mehr vermin-<lb/>dert, als eine Spitze thun kan, da hingegen die Spitze <lb/>leicht einſauget, weil in dieſem Falle das Beſtreben der <lb/>Materie, aus dem elektriſirten Körper herauszugehen, <lb/>größer iſt, als wenn ihm eine platte Oberfläche entgegen-<lb/>ſtehet. </s>
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3305 <s xml:id="echoid-s1696" xml:space="preserve">Es iſt alſo nicht eine beſondere Eigenſchaft der <lb/>Spitze und der platten Fläche, ſondern es iſt der verſchie-<lb/>dene Zuſtand des elektriſirten Körpers die Urſache, um <lb/>deren willen die Elektricität leichter und auf eine größere <lb/>Weite übergeht, wenn ihr ein zugeſpitzter Leiter, als wenn <lb/>ein platter oder kugelförmiger Ableiter entgegenſteht. </s>
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3306 <s xml:id="echoid-s1697" xml:space="preserve"><anchor type="note" xlink:href="" symbol="*)"/></s>
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3307 </p>
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3308 <p>
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3309 <s xml:id="echoid-s1698" xml:space="preserve">Die Fähigkeit der Ableiter, Elektricität aufzuneh-<lb/>men, ſteht im Verhältniß mit der @röße der Oberfläche, <lb/>welche frey iſt, oder auf welche keine ähnliche Atmoſphäre <lb/>wirkt; </s>
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3310 <s xml:id="echoid-s1699" xml:space="preserve">ein Umſtand, der auf die Ableiter an den Gebäu-<lb/>den mehr oder weniger Einfluß hat, nach Beſchaffenheit <lb/>der Wolken und ihrer Atmoſphären, der Zeit, in welcher <lb/>ſich ihr Einfluß äußert, der Natur der leitenden Erdſchich-<lb/>ten und ihrer elektriſchen Lage.</s>
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3311 <s xml:id="echoid-s1700" xml:space="preserve"/>
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3312 </p>
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3313 <p>
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3314 <s xml:id="echoid-s1701" xml:space="preserve">Fig. </s>
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3315 <s xml:id="echoid-s1702" xml:space="preserve">68. </s>
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3316 <s xml:id="echoid-s1703" xml:space="preserve">ſtellt die Giebeſſeite eines Hauſes vor, wel-<lb/>che ſenkrecht auf dem horizontalen Fußbrete F G befeſtiget <lb/>
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3317 <anchor type="note" xlink:label="note-0124-01a" xlink:href="note-0124-01"/>
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3318 <pb o="105" file="0125" n="125" rhead="Von den zugeſpitzten Blitzableitern."/>
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3319 iſt. </s>
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3320 <s xml:id="echoid-s1704" xml:space="preserve">Bey h i iſt in dieſelbe eine viereckigte Höhlung ein-<lb/>geſchnitten, in welche ein hölzernes Quadrat einpaſſet, <lb/>über deſſen Diagonallinie ein Drath hinweggeht. </s>
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3321 <s xml:id="echoid-s1705" xml:space="preserve">Auch <lb/>ſind zween Dräthe an dem Giebel ſelbſt befeſtiget, das un-<lb/>tere Ende des einen geht an die obere Ecke der quadrati-<lb/>ſchen Höhlung, das obere Ende des andern an ihre untere <lb/>Ecke. </s>
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3322 <s xml:id="echoid-s1706" xml:space="preserve">Die meſſingene Kugel kan von dem Drathe abge-<lb/>nommen werden, um nach Erfordern der Umſtände das <lb/>zugeſpitzte Ende dem Schlage auszuſetzen.</s>
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3323 <s xml:id="echoid-s1707" xml:space="preserve"/>
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3324 </p>
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3325 <div xml:id="echoid-div171" type="float" level="2" n="1">
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3326 <note symbol="*)" position="foot" xlink:label="note-0124-01" xlink:href="note-0124-01a" xml:space="preserve"> Man ſ. Volta’s Abhandl. in den Philoſ. Transact. <lb/>Vol. LXXII.</note>
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3327 </div>
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3328 </div>
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3329 <div xml:id="echoid-div173" type="section" level="1" n="168">
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3330 <head xml:id="echoid-head185" xml:space="preserve">144. Verſuch.</head>
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3331 <p>
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3332 <s xml:id="echoid-s1708" xml:space="preserve">Man bringe den Knopf einer Flaſche in Berührung <lb/>mit dem Conductor, verbinde den Boden der Flaſche mit <lb/>dem Hacken H, lade die Flaſche und bringe die Kugel un-<lb/>ter den Conductor, ſo wird die Flaſche durch eine Explo-<lb/>ſion aus dem Conductor in die Kugel auf dem Hauſe ent-<lb/>laden werden. </s>
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3333 <s xml:id="echoid-s1709" xml:space="preserve">Sind nun die Dräthe und Ketten alle in <lb/>Verbindung, ſo wird der Schlag bis in die äußere Seite <lb/>der Flaſche geleitet werden, ohne das Haus zu beſchädi-<lb/>gen; </s>
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3334 <s xml:id="echoid-s1710" xml:space="preserve">iſt aber das quadratiſche Holz ſo geſtellet, daß die <lb/>Dräthe dadurch nicht verbunden werden, ſondern die Com-<lb/>munikation abgeſchnitten iſt, ſo wird die elektriſche Ma-<lb/>terie, bey ihrem Uebergange in die äußere Seite der Fla-<lb/>ſche, das kleine Holz durch die Lateralkraft des Schlages <lb/>bis auf eine beträchtliche Weite fortwerfen. </s>
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3335 <s xml:id="echoid-s1711" xml:space="preserve">Man ſehe <lb/>Fig. </s>
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3336 <s xml:id="echoid-s1712" xml:space="preserve">68.</s>
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3337 <s xml:id="echoid-s1713" xml:space="preserve"/>
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3338 </p>
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3339 <p>
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3340 <s xml:id="echoid-s1714" xml:space="preserve">Man ſchraube nun die Kugel ab, und bringe die <lb/>darunter befindliche Spitze gegen den Conductor, ſo wird <lb/>man nicht im Stande ſeyn, die Flaſche zu laden; </s>
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3341 <s xml:id="echoid-s1715" xml:space="preserve">denn <lb/>die ſcharfe Spitze zieht nach und nach die Elektricität aus <lb/>dem Conductor, und führt ſie in die äußere Belegung der <lb/>Flaſche.</s>
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3342 <s xml:id="echoid-s1716" xml:space="preserve"/>
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3343 </p>
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3344 <p>
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3345 <s xml:id="echoid-s1717" xml:space="preserve">Hiebey ſtellt der erſte Leiter eine Gewitterwolke vor, <lb/>welche ihre Elektricität an einen Wetterhahn, oder einen <lb/>andern metalliſchen Theil an der Spitze eines Hauſes ab-
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3346 <pb o="106" file="0126" n="126" rhead="Neuntes Capitel."/>
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3347 giebt. </s>
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3348 <s xml:id="echoid-s1718" xml:space="preserve">Viele haben aus dieſem Verſuche geſchloſſen, daß <lb/>das Gebäude keinen Schaden leide, wenn eine metalliſche <lb/>Verbindung die elektriſche Materie bis in die Erde herab-<lb/>führen kan; </s>
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3349 <s xml:id="echoid-s1719" xml:space="preserve">daß hingegen dieſe Materie, wenn die Ver-<lb/>bindung unvollkommen iſt, von einem Theile zum andern <lb/>@berſpringe, und dadurch das ganze Gebäude beſchädige.</s>
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3350 <s xml:id="echoid-s1720" xml:space="preserve"/>
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3351 </p>
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3352 </div>
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3353 <div xml:id="echoid-div174" type="section" level="1" n="169">
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3354 <head xml:id="echoid-head186" xml:space="preserve">145. Verſuch.</head>
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3355 <p>
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3356 <s xml:id="echoid-s1721" xml:space="preserve">Herr Henly ſtellte auf einen gläſernen Fuß einen <lb/>Drath, welcher drey Achtel eines Zolles im Durchmeſſer <lb/>hielt, an dem einen Ende eine Kugel von drey Viertels <lb/>Zoll Durchmeſſer, und an dem andern eine ſehr ſcharfe <lb/>Spitze hatte. </s>
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3357 <s xml:id="echoid-s1722" xml:space="preserve">(Man ſ. </s>
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3358 <s xml:id="echoid-s1723" xml:space="preserve">Fig. </s>
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3359 <s xml:id="echoid-s1724" xml:space="preserve">69.) </s>
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3360 <s xml:id="echoid-s1725" xml:space="preserve">Um die Mitte dieſes <lb/>Draths hieng eine 12 Zoll lange Kette; </s>
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3361 <s xml:id="echoid-s1726" xml:space="preserve">er verband dieſe <lb/>Kette mit der Belegung einer geladenen Flaſche, und <lb/>brachte den Knopf derſelben ſehr langſam gegen die Ku-<lb/>gel des iſolirten Draths, um genau zu beobachten, in <lb/>welcher Entfernung der Schlag erfolgen würde; </s>
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3362 <s xml:id="echoid-s1727" xml:space="preserve">welches <lb/>allezeit in der Weite eines halben Zolles mit einer lauten <lb/>und ſtarken Exploſion geſchahe. </s>
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3363 <s xml:id="echoid-s1728" xml:space="preserve">Hierauf lud er die Fla-<lb/>ſche wieder, und brachte ihren Knopf eben ſo langſam <lb/>gegen die Spitze des iſolirten Draths, um auch hier zu <lb/>verſuchen, in welcher Weite der Schlag erfolgen würde; <lb/></s>
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3364 <s xml:id="echoid-s1729" xml:space="preserve">hier aber erfolgte nach vielen Verſuchen, gar kein Schlag; </s>
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3365 <s xml:id="echoid-s1730" xml:space="preserve"><lb/>die langſam genäherte Spitze zog allezeit die Ladung un-<lb/>merklich und ſtillſchweigend aus, ſo daß kaum das ſchwäch-<lb/>ſte Fünkchen in der Flaſche zurückblieb.</s>
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3366 <s xml:id="echoid-s1731" xml:space="preserve"/>
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3367 </p>
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3368 </div>
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3369 <div xml:id="echoid-div175" type="section" level="1" n="170">
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3370 <head xml:id="echoid-head187" xml:space="preserve">146. Verſuch.</head>
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3371 <p>
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3372 <s xml:id="echoid-s1732" xml:space="preserve">Eben dieſer Gelehrte verband eine Flaſche von 509 <lb/>Quadratzoll belegter Fläche mit dem erſten Leiter (ſ. </s>
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3373 <s xml:id="echoid-s1733" xml:space="preserve">Fig. <lb/></s>
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3374 <s xml:id="echoid-s1734" xml:space="preserve">68.) </s>
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3375 <s xml:id="echoid-s1735" xml:space="preserve">War die Flaſche ſo ſtark geladen, daß ſie das Elek-<lb/>@rometer auf 60° erhob, und brachte er die Kugel auf <lb/>dem Donnerhauſe der Kugel am erſten Leiter bis auf einen <lb/>halben Zoll nahe, ſo ward die Flaſche entladen, und das
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3376 <pb o="107" file="0127" n="127" rhead="Von den zugeſpitzten Blitzableitern."/>
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3377 Holz im Donnerhauſe bis auf eine beträchtliche Weite her-<lb/>ausgeworfen. </s>
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3378 <s xml:id="echoid-s1736" xml:space="preserve">Gebrauchte er aber ſtatt der Kugel den <lb/>zugeſpitzten Drath des Donnerhauſes, ſo ward die Flaſche <lb/>zwar ſchnell, aber doch ohne Schlag entladen, und das <lb/>Holz blieb ruhig an ſeiner Stelle.</s>
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3379 <s xml:id="echoid-s1737" xml:space="preserve"/>
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3380 </p>
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3381 </div>
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3382 <div xml:id="echoid-div176" type="section" level="1" n="171">
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3383 <head xml:id="echoid-head188" xml:space="preserve">147. Verſuch.</head>
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3384 <p>
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3385 <s xml:id="echoid-s1738" xml:space="preserve">Er machte hierauf eine doppelte Verbindung am <lb/>Donnerhauſe; </s>
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3386 <s xml:id="echoid-s1739" xml:space="preserve">die eine durch eine Kugel, die andere durch <lb/>einen ſcharf zugeſpitzten Drath. </s>
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3387 <s xml:id="echoid-s1740" xml:space="preserve">Beyde ſtanden 1{1/4} Zoll <lb/>von einander, aber in einerley Höhe. </s>
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3388 <s xml:id="echoid-s1741" xml:space="preserve">Bey eben ſo ſtarker <lb/>Ladung, als vorher, brachte er zuerſt die Kugel unter den <lb/>erſten Conductor, ſo daß dieſer einen halben Zoll über ihr, <lb/>die Spitze aber 1{1/4} Zoll von ihr abſtand; </s>
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3389 <s xml:id="echoid-s1742" xml:space="preserve">allein die Ku-<lb/>gel erhielt keinen Schlag, indem die Spitze die Ladung <lb/>ſtillſchweigend auszog. </s>
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3390 <s xml:id="echoid-s1743" xml:space="preserve">Auch blieb das Holz im Donner-<lb/>hauſe unbewegt liegen.</s>
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3391 <s xml:id="echoid-s1744" xml:space="preserve"/>
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3392 </p>
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3393 </div>
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3394 <div xml:id="echoid-div177" type="section" level="1" n="172">
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3395 <head xml:id="echoid-head189" xml:space="preserve">148. Verſuch.</head>
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3396 <p>
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3397 <s xml:id="echoid-s1745" xml:space="preserve">Er iſolirte eine große Flaſche, und verband durch <lb/>Ketten mit der äußern Belegung, auf einer Seite eine <lb/>Kugel, auf der andern einen ſcharf zugeſpitzten Drath. <lb/></s>
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3398 <s xml:id="echoid-s1746" xml:space="preserve">Beyde waren iſolirt, und ſtanden 5 Zoll weit von einan-<lb/>der. </s>
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3399 <s xml:id="echoid-s1747" xml:space="preserve">(ſ. </s>
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3400 <s xml:id="echoid-s1748" xml:space="preserve">Fig. </s>
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3401 <s xml:id="echoid-s1749" xml:space="preserve">70.) </s>
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3402 <s xml:id="echoid-s1750" xml:space="preserve">Er ſtellte nunmehr eine iſolirte küpfer-<lb/>ne Kugel von 8 Zoll im Durchmeſſer ſo, daß ſie gerade <lb/>einen halben Zoll weit ſowohl von dem Knopfe als von <lb/>der Spitze abſtand. </s>
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3403 <s xml:id="echoid-s1751" xml:space="preserve">Die Flaſche ward geladen, und die <lb/>Entladung geſchahe vermittelſt des Ausladers auf die Ku-<lb/>gel, aus welcher ſie in den Knopf A überſprang, der drey <lb/>Viertel Zoll im Durchmeſſer hielt. </s>
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3404 <s xml:id="echoid-s1752" xml:space="preserve">Die Exploſion wav <lb/>ſehr laut und ſtark, und die Kette leuchtete.</s>
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3405 <s xml:id="echoid-s1753" xml:space="preserve"/>
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3406 </p>
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3407 </div>
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3408 <div xml:id="echoid-div178" type="section" level="1" n="173">
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3409 <head xml:id="echoid-head190" xml:space="preserve">149. Verſuch.</head>
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3410 <p>
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3411 <s xml:id="echoid-s1754" xml:space="preserve">Herr Henly hieng an das Ende eines hölzernen <lb/>Stabes, der ſich in horizontaler Richtung frey um eine
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3412 <pb o="108" file="0128" n="128" rhead="Neuntes Capitel."/>
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3413 Nadelſpitze drehen konnte, mit ſeidnen Schnüren eine <lb/>große mit Metallblättchen vergoldete Ochſenblaſe auf, die <lb/>durch ein Gegengewicht am andern Ende des Stabes ge-<lb/>halten wurde. </s>
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3414 <s xml:id="echoid-s1755" xml:space="preserve">Man ſehe Fig. </s>
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3415 <s xml:id="echoid-s1756" xml:space="preserve">71. </s>
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3416 <s xml:id="echoid-s1757" xml:space="preserve">Er gab dieſer Blaſe <lb/>einen ſtarken Funken aus dem Knopfe einer geladenen <lb/>Flaſche, und näherte ihr alsdann eine meſſingene Kugel <lb/>von 2 Zollen im Durchmeſſer, wobey er bemerkte, daß <lb/>die Blaſe der Kugel auf 3 Zoll weit entgegen kam, und <lb/>als ſie noch um einen Zoll entfernt war, die Elektricität <lb/>in einem ſtarken Funken übergieng. </s>
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3417 <s xml:id="echoid-s1758" xml:space="preserve">Er gab hierauf der <lb/>Blaſe einen neuen Funken, und näherte ihr einen zuge-<lb/>ſpitzten Drath. </s>
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3418 <s xml:id="echoid-s1759" xml:space="preserve">Dieſem kam ſie nicht entgegen, gab ihm <lb/>auch keinen Funken, ſondern ihre Elektricität gieng ſtill-<lb/>ſchweigend in die Spitze über.</s>
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3419 <s xml:id="echoid-s1760" xml:space="preserve"/>
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3420 </p>
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3421 </div>
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3422 <div xml:id="echoid-div179" type="section" level="1" n="174">
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3423 <head xml:id="echoid-head191" xml:space="preserve">150. Verſuch.</head>
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3424 <p>
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3425 <s xml:id="echoid-s1761" xml:space="preserve">Man nehme 2 bis 3 Flocken feine Baumwolle, befeſti. <lb/></s>
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3426 <s xml:id="echoid-s1762" xml:space="preserve">ge eine davon mit einem feinen Faden an den Conductor, <lb/>die zwote an die erſte, und die dritte an die zwote, und <lb/>drehe die Maſchine, ſo werden die baumwollenen Flocken <lb/>ihre Fäden ausbreiten, und ſich gegen den Tiſch zu ver-<lb/>längern. </s>
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3427 <s xml:id="echoid-s1763" xml:space="preserve">Man halte eine ſcharfe Spitze gegen die unter-<lb/>ſte, ſo wird ſie aufwärts gegen die zwote, dieſe gegen die <lb/>dritte, und alle zuſammen gegen den Conductor zuſam-<lb/>menſchrumpfen, und in dieſem Zuſtande ſo lange bleiben, <lb/>als die Spitze darunter ſteht.</s>
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3428 <s xml:id="echoid-s1764" xml:space="preserve"/>
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3429 </p>
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3430 </div>
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3431 <div xml:id="echoid-div180" type="section" level="1" n="175">
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3432 <head xml:id="echoid-head192" xml:space="preserve">151. Verſuch.</head>
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3433 <p>
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3434 <s xml:id="echoid-s1765" xml:space="preserve">Man befeſtige eine Menge feine Fäden oder Haare <lb/>an das Ende des erſten Leiters; </s>
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3435 <s xml:id="echoid-s1766" xml:space="preserve">wenn man nun den Cy-<lb/>linder umdreht, ſo werden dieſelben wie Halbmeſſer des <lb/>Kreiſes vom Mittelpunkte aus divergi@en: </s>
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3436 <s xml:id="echoid-s1767" xml:space="preserve">man fahre fort, <lb/>den Cylinder zu drehen, und bringe eine Spitze gegen die <lb/>eine Seite des Conductors, ſo werden die Fäden an dieſer <lb/>Seite herabfallen, und ihre Divergenz verlieren; </s>
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3437 <s xml:id="echoid-s1768" xml:space="preserve">die an
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3438 <pb o="109" file="0129" n="129" rhead="Von den zugeſpitzten Blitzableitern."/>
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3439 der andern Seite aber werden noch immer diverglren. <lb/></s>
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3440 <s xml:id="echoid-s1769" xml:space="preserve">Hieraus erhellet, daß das Vermögen der Spitzen, die <lb/>Elektricität auszuziehen, ſich nicht rund um den elektri-<lb/>ſirten Körper herum erſtrecke, wenn Mittel angewende@ <lb/>werden, den Verluſt der Elektricität zu erſetzen.</s>
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3441 <s xml:id="echoid-s1770" xml:space="preserve"/>
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3442 </p>
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3443 <p>
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3444 <s xml:id="echoid-s1771" xml:space="preserve">Fig. </s>
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3445 <s xml:id="echoid-s1772" xml:space="preserve">72 zeigt ein ovales Bret, 3 Schuhe lang und <lb/>2 Schuhe breit, auf beyden Seiten mit Stanniol belegt, <lb/>und mit ſeidnen Fäden an den beyden Armen eines Hebels <lb/>aufgehangen. </s>
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3446 <s xml:id="echoid-s1773" xml:space="preserve">Dieſer Hebel dreht ſich um eine Achſe, wel-<lb/>che an den einen Arm einer ſeinen Wage befeſtiget iſt, und <lb/>am andern Arme durch ein Gegengewicht gehalten wird. <lb/></s>
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3447 <s xml:id="echoid-s1774" xml:space="preserve">Ein Theil des Tiſches unter dem Brete muß mit Stanniol <lb/>belegt, und durch eine Kette mit dem Boden verbunden <lb/>werden.</s>
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3448 <s xml:id="echoid-s1775" xml:space="preserve"/>
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3449 </p>
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3450 </div>
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3451 <div xml:id="echoid-div181" type="section" level="1" n="176">
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3452 <head xml:id="echoid-head193" xml:space="preserve">152. Verſuch.</head>
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3453 <p>
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3454 <s xml:id="echoid-s1776" xml:space="preserve">Man verbinde das herabhangende Bret durch einen <lb/>feinen Drath mit dem erſten Leiter, ſo wird durch einige <lb/>wenige Umdrehungen der Maſchine der ganze Apparatus <lb/>elektriſiret. </s>
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3455 <s xml:id="echoid-s1777" xml:space="preserve">Bey Anſtellung dieſes Verſuchs ward das <lb/>Bret vom Tiſche auf 15 Zoll weit angezogen, und ent-<lb/>lud ſich von ſelbſt mit einem ſtarken Funken. </s>
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3456 <s xml:id="echoid-s1778" xml:space="preserve">Eben die-<lb/>ſes erfolgte, wenn man eine metallene Kugel auf den <lb/>Tiſch ſtellte, und das Bret derſelben bis auf einen Zoll <lb/>weit näherte, da es ſich denn mit einem Funken entlud. <lb/></s>
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3457 <s xml:id="echoid-s1779" xml:space="preserve">Befeſtiget man ſtatt der Kugel eine Spitze auf den Tiſch, <lb/>ſo fängt das hangende Bret zwar an, ſich derſelben zu <lb/>nähern, allein es ſteht 4 — 5 Zoll weit vom Tiſche ſtill, <lb/>und kömmt nicht näher, giebt auch keinen Funken: </s>
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3458 <s xml:id="echoid-s1780" xml:space="preserve">im <lb/>Dunkeln ſieht man ein ſchwaches Licht an der Spitze. </s>
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3459 <s xml:id="echoid-s1781" xml:space="preserve">Es <lb/>ward hierauf eíne leidner Flaſche mit dem erſten Leiter <lb/>verbunden; </s>
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3460 <s xml:id="echoid-s1782" xml:space="preserve">und nun waren mehrere Umdrehungen der <lb/>Maſchine nöthig, um den Apparatus zu laden; </s>
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3461 <s xml:id="echoid-s1783" xml:space="preserve">die Wir-<lb/>kung aber war eben ſo, wie vorher. </s>
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3462 <s xml:id="echoid-s1784" xml:space="preserve">Man hielt das Ge-<lb/>gengewicht, damit das Bret nicht eher herabſinken möch-<lb/>te, bis es die völlige Ladung erhalten hätte; </s>
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3463 <s xml:id="echoid-s1785" xml:space="preserve">ſobald man
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3464 <pb o="110" file="0130" n="130" rhead="Neuntes Capitel."/>
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3465 es aber frey ließ, ward es nicht allein von der Spitze an-<lb/>gezogen, ſondern gab ihr auch eine ſehr laute und ſtarke <lb/>Exploſion, daß ſogar der umliegende Stanniol von dem <lb/>darüber fliegenden Feuer befleckt ward.</s>
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3466 <s xml:id="echoid-s1786" xml:space="preserve"/>
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3467 </p>
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3468 <p>
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3469 <s xml:id="echoid-s1787" xml:space="preserve">Der nachfolgende Verſuch iſt aus Herrn Wilſons <lb/>Nachricht von den im Pantheon über die Na-<lb/>tur und den Nugen der Ableiter angeſtellten <lb/>Verſuchen genommen. </s>
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3470 <s xml:id="echoid-s1788" xml:space="preserve">Er ward in der Abficht ange-<lb/>ſtellt, um auszumachen, was in dem Verſuche des Herrn <lb/>Henly, welcher bey uns der 148ſte iſt, fehlerhaft ſey.</s>
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3471 <s xml:id="echoid-s1789" xml:space="preserve"/>
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3472 </p>
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3473 <p>
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3474 <s xml:id="echoid-s1790" xml:space="preserve">Die gemachte Verbindung beſtand aus zween <lb/>Theilen.</s>
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3475 <s xml:id="echoid-s1791" xml:space="preserve"/>
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3476 </p>
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3477 <p>
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3478 <s xml:id="echoid-s1792" xml:space="preserve">Den einen Theil machte ein gebogener meſſingener <lb/>Stab aus, an deſſen oberes Ende eine meſſingene Kugel <lb/>von drey Viertel Zoll Durchmeſſer, an das untere aber <lb/>eine küpferne Kugel von 5 Zoll Durchmeſſer angeſchraubt <lb/>war. </s>
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3479 <s xml:id="echoid-s1793" xml:space="preserve">Dieſer Theil ſtand auf einem hölzernen Fuße mit <lb/>einer meſſingenen Haube, in welche der meſſingene Stab <lb/>erforderlichen Falls eingeſchraubt werden konnte.</s>
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3480 <s xml:id="echoid-s1794" xml:space="preserve"/>
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3481 </p>
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3482 <p>
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3483 <s xml:id="echoid-s1795" xml:space="preserve">Der andere Theil der Verbindung beſtand ebenfalls <lb/>aus einem meſſingenen Stabe, deſſen Ende gabelförmig <lb/>gebogen war, mit zween Spitzen, die ſich nach dem Mit-<lb/>telpunkte der küpfernen Kugel richteten. </s>
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3484 <s xml:id="echoid-s1796" xml:space="preserve">Dieſe Spitzen <lb/>waren ſo eingerichtet, daß man ſie nach Erfordern des <lb/>Verſuchs länger oder kürzer machen konnte. </s>
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3485 <s xml:id="echoid-s1797" xml:space="preserve">Am Ende <lb/>der einen Spitze war eine meſſingene Kugel von drey Vier-<lb/>tel Zoll Durchmeſſer, und am Ende der andern eine ſtäh-<lb/>lerne Spitze oder Nadel befeſtiget. </s>
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3486 <s xml:id="echoid-s1798" xml:space="preserve">Der Stiel dieſer Ga-<lb/>bel war in eine kleine eiſerne Platte geſchraubt, welche an <lb/>der innern Seite eines hölzernen Gefäßes befeſtiget war, <lb/>das den größten Theil einer cylindriſchen gläſernen Flaſche <lb/>umſchloß. </s>
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3487 <s xml:id="echoid-s1799" xml:space="preserve">Dieſe Flaſche war zwölf und drey Viertel Zoll <lb/>hoch, und hatte ohngefähr 4 Zoll im Durchmeſſer. </s>
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3488 <s xml:id="echoid-s1800" xml:space="preserve">Die-<lb/>ſes Glas war ſtärker, als ſonſt gewöhnlich, und hatte an <lb/>jeder Seite ohngefähr 144 Quadratzoll Stanniolbele-<lb/>gung. </s>
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3489 <s xml:id="echoid-s1801" xml:space="preserve">Ueberdies war auch ein Theil der inwendigen
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3490 <pb o="111" file="0131" n="131" rhead="Von den zugeſpitzten Blitzableitern."/>
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3491 Seite des hölzernen Gefäßes mit Stanniol belegt, um <lb/>eine beſſere Verbindung zwiſchen der eiſernen Platte und <lb/>der äußern Belegung der Flaſche machen zu können. </s>
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3492 <s xml:id="echoid-s1802" xml:space="preserve">In <lb/>die Flaſche ſelbſt war ein hölzerner ebenfalls mit Stanniol <lb/>überzogner Cylinder befeſtiget, um die innere Belegung <lb/>des Glaſes deſto beſſer mit dem meſſingenen Stabe zu <lb/>verbinden, der aus der Mitte des hölzernen Cylinders <lb/>ſenkrecht herauf gieng. </s>
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3493 <s xml:id="echoid-s1803" xml:space="preserve">Dieſer aufwärts gehende Stab <lb/>hatte am Ende eine meſſingene Kugel von drey Viertel <lb/>Zoll Durchmeſſer, und war gegen den erſten Theil der <lb/>Verbindung zu gebogen, ſo daß die beyden Kugeln A und <lb/>B, Fig. </s>
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3494 <s xml:id="echoid-s1804" xml:space="preserve">73. </s>
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3495 <s xml:id="echoid-s1805" xml:space="preserve">wagrecht gegen einander ſtanden, aber von <lb/>Zeit zu Zeit nach Erfordern in andere Entfernungen von <lb/>einander geſtellt werden konnten, und ſich alſo ſtatt eines <lb/>Elektrometers brauchen ließen.</s>
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3496 <s xml:id="echoid-s1806" xml:space="preserve"/>
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3497 </p>
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3498 <p>
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3499 <s xml:id="echoid-s1807" xml:space="preserve">Herr Wilſon fieng die Verſuche da an, wo das <lb/>Elektrometer bis auf die größte Weite von dem Schlage <lb/>getroſſen wurde, und richtete die Diſtanzen der Kugel <lb/>gehörig darnach ein, daß, wenn der Schlag die Spitze <lb/>traf, eine Verrückung der Kugel um {1/32} Zoll machte, daß <lb/>die Kugel nur allein, und die Spitze nicht getroffen wurde, <lb/>und umgekehrt. </s>
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3500 <s xml:id="echoid-s1808" xml:space="preserve">Hierauf verminderte er die Schlagweite <lb/>des Elektrometers in jedem Verſuche, bis er die geringſte <lb/>Weite erreicht hatte.</s>
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3501 <s xml:id="echoid-s1809" xml:space="preserve"/>
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3502 </p>
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3503 <p>
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3504 <s xml:id="echoid-s1810" xml:space="preserve">Alle dieſe Verſuche wurden hierauf mit umgekehr-<lb/>tem Apparatus wiederhohlt, daß nämlich die Kugel auf <lb/>die Flaſche und die Gabel auf das Stativ befeſtiget ward; <lb/></s>
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3505 <s xml:id="echoid-s1811" xml:space="preserve">als dieſe Reihe von Verſuchen vollſtändig war, ſtellte er <lb/>noch andere an, wobey zuerſt die Kugel allein, und dann <lb/>die Spitze allein gegen die küpferne Kugel gehalten ward.</s>
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3506 <s xml:id="echoid-s1812" xml:space="preserve"/>
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3507 </p>
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3508 <p>
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3509 <s xml:id="echoid-s1813" xml:space="preserve">Nachdem alle dieſe Verſuche vollendet waren, wie <lb/>ſie in der erſten Tabelle verzeichnet ſind, wiederholte er <lb/>auch die Verſuche mit der Kette nach Herrn Henly’s <lb/>Art. </s>
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3510 <s xml:id="echoid-s1814" xml:space="preserve">Ihre Reſultate ſo wohl, als die mit dem umge-<lb/>kehrten Apparatus ſind in der zweyten Tabelle verzeichnet.</s>
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3511 <s xml:id="echoid-s1815" xml:space="preserve"/>
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3512 </p>
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3513 <pb o="112" file="0132" n="132" rhead="Neuntes Capitel."/>
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3514 </div>
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3515 <div xml:id="echoid-div182" type="section" level="1" n="177">
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3516 <head xml:id="echoid-head194" xml:space="preserve">Erſte Tafel.</head>
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3517 <head xml:id="echoid-head195" xml:space="preserve">Verſuche bey D. Higgins am 19 Junii 1778 mit <lb/>der leidner Flaſche und dem gabelförmigen <lb/>Apparatus.</head>
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3518 <p>
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3519 <s xml:id="echoid-s1816" xml:space="preserve"><emph style="bf">Anm.</emph> Alle in den Tafeln vorkommende Maaße beziehen <lb/>ſich auf Zweyunddreyßigtheile des Zolles.</s>
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3520 <s xml:id="echoid-s1817" xml:space="preserve"/>
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3521 </p>
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3522 <p>
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3523 <s xml:id="echoid-s1818" xml:space="preserve">Die Zahl bey dem Worte: </s>
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3524 <s xml:id="echoid-s1819" xml:space="preserve">Elektrometer bedeu-<lb/>tet die Entfernung der Kugeln des Elektrometers von <lb/>einander; </s>
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3525 <s xml:id="echoid-s1820" xml:space="preserve">die Zahlen bey den Worten: </s>
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3526 <s xml:id="echoid-s1821" xml:space="preserve">Rugel und <lb/>Spig<unsure/>e zeigen die größten Diſtanzen, bis auf welche <lb/>jedes von ihnen den Schlag empfieng.</s>
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3527 <s xml:id="echoid-s1822" xml:space="preserve"/>
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3528 </p>
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3529 <note position="right" xml:space="preserve"> <lb/># ## Kugel und Spltze \\ zugletch # Kugel \\ allein # Spltze \\ allein # Umgekebrt. \\ Apparatus # Kugel \\ allein # Spitze \\ allein <lb/>" # Elektrom. # 32 # 32 # 32 # 32 – # 32 # 32 <lb/>I. # Kugel – # 34 # 48 # — # 34 – # 36 # — <lb/>" # Spitze – # 45 # — # 88 # 43 – # — # 42 <lb/>" # E. – # 28 # 28 # 28 # 28 – # 28 # 28 <lb/>II. # K. – # 30 # 43 # — # 36 – # 33 # — <lb/>" # Sp. – # 38 # — # 78 # 42 – # — # 39 <lb/>" # E. – # 25 # 26 # 26 # 25 – # 25 # 26 <lb/>III. # K. – # 28 # 36 # — # 31 – # 32 # — <lb/>" # Sp. – # 37 # — # 67 # 32 – # — # 33 <lb/>" # E. – # 20 # 20 # 20 # 20 – # 20 # 20 <lb/>IV. # K. – # 28 # 29 # — # 29 – # 25 # — <lb/>" # Sp. – # 51 # — # 64 # 28 – # — # 24 <lb/>" # E. – # 16 # 16 # 16 # 16 – # 16 # 16 <lb/>V. # K. – # 22 # 20 # — # 22 – # 23 # — <lb/>" # Sp. – # 44 # — # 47 # 24 – # — # 26 <lb/>" # E. – # 13 # 13 # 13 # 13 – # 13 # 13 <lb/>VI. # K. – # 21 # 14 # — # 16 – # 18 # — <lb/>" # Sp. – # 38 # — # 36 # 22 – # — # 22 <lb/>" # E. – # 10 # 10 # 10 # 10 – # 10 # 10 <lb/>VII. # K. – # 12 # 10 # — # 13 – # 12 # — <lb/>" # Sp. – # 18 # — # 25 # 20 – # — # 20 <lb/></note>
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3530 <pb o="113" file="0133" n="133" rhead="Von den zugeſpitzten Blitzableitern."/>
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3531 </div>
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3532 <div xml:id="echoid-div183" type="section" level="1" n="178">
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3533 <head xml:id="echoid-head196" xml:space="preserve"><emph style="bf">Zweyte Tafel.</emph></head>
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3534 <p>
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3535 <s xml:id="echoid-s1823" xml:space="preserve">Verſuche mit der Kette, nach Herrn Henly’s Art.</s>
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3536 <s xml:id="echoid-s1824" xml:space="preserve"/>
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3537 </p>
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3538 <note position="right" xml:space="preserve"> <lb/>## Kugel und Spitze zugleich. # # # Umgekehrterl Apparatus. <lb/>Elektrometer # 21 # — # 23 # # 23 <lb/>Kugel – - # 26 # — # 28 # bey einer Wlederholung # 26 <lb/>Spitze – - # 24 # — # 26 # # 30 <lb/></note>
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3539 </div>
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3540 <div xml:id="echoid-div184" type="section" level="1" n="179">
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3541 <head xml:id="echoid-head197" xml:space="preserve"><emph style="bf">Dritte Tafel.</emph></head>
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3542 <p>
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3543 <s xml:id="echoid-s1825" xml:space="preserve">Verſuche der erſten und zweyten Tafel, wiederholet bey Herrn <lb/>Partington am 23 Jun. </s>
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3544 <s xml:id="echoid-s1826" xml:space="preserve">1778. </s>
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3545 <s xml:id="echoid-s1827" xml:space="preserve">mit einer meſſingenen <lb/>Kette ſtatt der Gabel.</s>
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3546 <s xml:id="echoid-s1828" xml:space="preserve"/>
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3547 </p>
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3548 <note position="right" xml:space="preserve"> <lb/># ## Kugel und Spitze \\ zugletch # Kugel \\ allein # Spitze \\ allein # Umgekehrt. \\ Apparatus # # # Kugel \\ allein # Spitze \\ allein <lb/>" # Elektrom. # 32 # 32 # 32 # 32 – # # # 32 # 32 <lb/>I. # Kugel – # 40 # 39 # — # 30 – # # # 29 # — <lb/>" # Spitze – # 76 # — # 71 # 38 – # # # — # 39 <lb/>" # E. – # 28 # 28 # 28 # 28 – # # # 28 # 28 <lb/>II. # K. – # 33 # 36 # — # 29 – # # # 28 # — <lb/>" # Sp. – # 72 # — # 66 # 37 – # # # — # 38 <lb/>" # E. – # 25 # 26 # 26 # 25 – # 25 # 26 # 26 <lb/>III. # K. – # 33 # 33 # — # 28 – wieder \\ holt # 28 # 27 # — <lb/>" # Sp. – # 46 # — # 64 # 35 – # 37 # — # 37 <lb/>" # E. – # 20 # 20 # 20 # 20 – # # # 20 # 20 <lb/>IV. # K. – # 21 # 23 # — # 24 – # # # 24 # — <lb/>" # Sp. – # 50 # — # 60 # 26 – # # # — # 27 <lb/>" # E. – # 16 # 16 # 16 # 16 – # # # 16 # 16 <lb/>V. # K. – # 21 # 15 # — # 19 – # # # 19 # — <lb/>" # Sp. – # 55 # — # 53 # 21 – # # # — # 24 <lb/>" # E. – # 13 # 13 # 13 # 13 – # # # 13 # 13 <lb/>VI. # K. – # 16 # 11 # — # 14 – # # # 15 # — <lb/>" # Sp. – # 44 # — # 42 # 19 – # # # — # 22 <lb/>" # E. – # 10 # 10 # 10 # 10 – # # # 10 # 10 <lb/>VII. # K. – # 11 # 9 # — # 11 – # # # 12 # — <lb/>" # Sp. – # 38 # — # 37 # 19 – # # # — # 19 <lb/></note>
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3549 <note position="right" xml:space="preserve"> <lb/>Elektrometer # 21 # # 23 <lb/>Kugel – - # 24 # Umgekehrter Apparatus # 25 <lb/>Spitze – - # 64 # # 30 <lb/></note>
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diff changeset
3550 <pb o="114" file="0134" n="134" rhead="Neuntes Capitel."/>
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diff changeset
3551 <quote><s xml:id="echoid-s1829" xml:space="preserve">Seitdem es bekannt iſt, ſagt Herr Wilſon, daß
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diff changeset
3552 die Elektricität mit dem Blitze einerley ſey, iſt auch
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diff changeset
3553 durchgängig zugegeben worden, daß man in Ländern,
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parents:
diff changeset
3554 wo die Gewitter häufig ſind, der Ableiter zur Sicher-
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diff changeset
3555 heit der Gebäude nicht wohl entbehren könne. Der
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diff changeset
3556 Grundſatz, nach welchem die Ableiter wirken, iſt dieſer:
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parents:
diff changeset
3557 daß die elektriſche Materie, wenn ſie durch irgend eine
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parents:
diff changeset
3558 Kraft angetrieben wird, allezeit dahin gehe, wo ſie den
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parents:
diff changeset
3559 wenigſten Widerſtand findet. Da ihr nun die Metalle
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parents:
diff changeset
3560 den wenigſten Widerſtand bey ihrem Fortgange entge-
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parents:
diff changeset
3561 genſetzen, ſo wird ſie allezeit eher an einem metallenen
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parents:
diff changeset
3562 Stabe fortlaufen, als einen andern Weg ſuchen. Man
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diff changeset
3563 muß aber hiebey bemerken, daß die Elektricität nie-
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parents:
diff changeset
3564 mals in einen Körper bloß um dieſes Körpers ſelbſt
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parents:
diff changeset
3565 willen geht, ſondern nur, in ſo fern ſie durch ihn an den
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parents:
diff changeset
3566 Ort ihrer Beſtimmung gelangen kann. Wenn durch
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parents:
diff changeset
3567 eine Elektriſirmaſchine eine Menge Elektricität aus der
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parents:
diff changeset
3568 Erde geſammlet wird, ſo erhält ein mit der Erde ver-
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parents:
diff changeset
3569 bundener Körper einen ſtarken Funken aus dem erſten
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parents:
diff changeset
3570 Leiter; dieſen Funken bekömmt er nicht darum, weil er
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parents:
diff changeset
3571 etwa fähig wäre, alle im Cylinder und Conductor ent-
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parents:
diff changeset
3572 haltene Elektricität in ſich aufzunehmen, ſondern darum,
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parents:
diff changeset
3573 weil der natürliche Zuſtand der elektriſchen Materie
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parents:
diff changeset
3574 durch die Bewegung der Maſchine geſtört iſt, und ein
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parents:
diff changeset
3575 Strom von dergleichen Materie aus der Erde gelockt
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3576 wird. Daher beſtreben ſich die natürlichen Kräfte, das,
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parents:
diff changeset
3577 was auf dieſe Art aus der Erde gezogen wird, derſelben
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parents:
diff changeset
3578 wieder zu erſetzen; und da der Ueberſchuß, welcher ſich im
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parents:
diff changeset
3579 Conductor befindet, zu Erſetzung dieſes Mangels gerade
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parents:
diff changeset
3580 am geſchickteſten iſt, weil er zu keiner weitern Abſicht
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3581 verwendet wird, ſo zeigt er jederzeit ein Beſtreben, wie-
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parents:
diff changeset
3582 der zur Erde zurückzukehren. Wird alsdann ein leiten-
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parents:
diff changeset
3583 der mit der Erde verbundener Körper dem erſten Leiter
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parents:
diff changeset
3584 genähert, ſo richtet ſich die ganze Kraft der Elektricität
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parents:
diff changeset
3585 gegen dieſen Körper; nicht bloß darum, weil er ein Lei-
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parents:
diff changeset
3586 ter iſt, ſondern, weil er an die Stelle leitet, nach wel-
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parents:
diff changeset
3587 <pb o="115" file="0135" n="135" rhead="Von den zugeſpitzten Blitzableitern."/>
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parents:
diff changeset
3588 cher die elektriſche Materie durch die in ihr herrſchenden
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parents:
diff changeset
3589 natürlichen Kräfte getrieben wird, und nach der ſie ſich
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parents:
diff changeset
3590 auch andere Wege bahnen würde, wenn ihr gleich dieſer
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parents:
diff changeset
3591 leitende Körper nicht wäre dargeſtellt worden. Daß
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parents:
diff changeset
3592 dies wirklich der Fall ſey, ſieht man leicht, wenn man
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parents:
diff changeset
3593 dem Conductor der Maſchine eben dieſe leitende Sub-
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parents:
diff changeset
3594 ſtanz in einem iſolirten Zuſtande entgegenſtellet, wobey
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parents:
diff changeset
3595 nur ein ſehr ſchwacher Funken entſteht. Eben ſo, wenn
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parents:
diff changeset
3596 der Blitz einen Baum, ein Haus oder einen Ableiter
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parents:
diff changeset
3597 trift, geſchieht dies nicht darum, weil dieſe Gegenſtände
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parents:
diff changeset
3598 hoch oder der Wolke nahe ſind, ſondern weil ſie mit einer
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parents:
diff changeset
3599 Stelle unter der Erdfläche in Verbindung ſtehen, gegen
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parents:
diff changeset
3600 welche das Beſtreben des Blitzes gerichtet iſt, und an
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parents:
diff changeset
3601 welche derſelbe gewiß auch gelangt wäre, wenn gleich
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parents:
diff changeset
3602 keiner der erwähnten Gegenſtände dazwiſchen geſtanden
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3603 hätte.</s></quote>
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3604 <quote><s xml:id="echoid-s1830" xml:space="preserve">Wenn die Atmoſphäre anfängt, entweder negativ
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3605 oder poſitiv elektriſirt zu werden, ſo nimmt die Erde ver-
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parents:
diff changeset
3606 mittelſt der Unebenheit und Feuchtigkeit ihrer Oberfläche,
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parents:
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3607 hauptſächlich aber durch die auf ihr wachſenden Vegeta-
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parents:
diff changeset
3608 bilien dieſe Elektricität ebenfalls an, und wird bald auf
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parents:
diff changeset
3609 gleiche Art mit der Atmoſphäre elektriſirt; dieſe Mit-
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parents:
diff changeset
3610 theilung aber hört in kurzer Zeit auf, weil ſie nicht fort-
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parents:
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3611 dauren kann, ohne zugleich die ganze in der Erde ſelbſt
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parents:
diff changeset
3612 enthaltene elektriſche Materie in Bewegung zu ſetzen.
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parents:
diff changeset
3613 Nunmehr entſtehen aus bereits angegebnen Urſachen
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parents:
diff changeset
3614 unter der Oberfläche der Erde abwechſelnde Zonen von
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parents:
diff changeset
3615 poſitiver und negativer Elektricität. Der Wetterſtral
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parents:
diff changeset
3616 entſteht jederzeit zwiſchen der Atmoſphäre und einer dieſer
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parents:
diff changeset
3617 Zonen. Nimmt man z. B. an, die Atmoſphäre ſey
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parents:
diff changeset
3618 poſitiv elektriſiret, ſo wird die Erdfläche durch die Bäu-
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3619 me u.ſ.f. bald ebenfalls poſitiv elektriſiret werden; wir
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parents:
diff changeset
3620 wollen annehmen bis auf eine Tiefe von 10 Schuh:
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parents:
diff changeset
3621 weiter kann die Elektricität nicht dringen, weil ihr die
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parents:
diff changeset
3622 elektriſche Materie im Innern der Erde zu ſtark wider-
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parents:
diff changeset
3623 ſteht. In der Tiefe von 10 Schuh fängt eine Zone
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diff changeset
3624 <pb o="116" file="0136" n="136" rhead="Neuntes Capitel."/>
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parents:
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3625 von negativ elektrifirter Erde an, von welcher die Elek-
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parents:
diff changeset
3626 tricität der Atmoſphäre angezogen wird. Dieſe kann
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parents:
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3627 aber nicht in die negative Zone gelangen, ohne vorher
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parents:
diff changeset
3628 die darüber liegende poſitive zu durchbrechen, und alle
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parents:
diff changeset
3629 ihr im Wege liegende ſchlechte Leiter zu zerſchmettern.
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parents:
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3630 Man kann alſo ſicher behaupten, daß der Blitz da durch-
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3631 ſchlagen werde, wo die Zone von poſitiv elektriſirter Er-
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parents:
diff changeset
3632 de am dünnſten iſt, es mag ſich nun daſelbſt ein Leiter
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parents:
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3633 befinden oder nicht. Iſt ein Leiter vorhanden, ſo wird
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parents:
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3634 ihn der Blitz unfehlbar treffen, er ſey nun zugeſpitzt oder
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parents:
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3635 ſtumpfgeendet: er würde aber an dieſer Stelle auch ein
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parents:
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3636 Gebäude ohne Leiter, und wenn kein Gebäude da geweſen
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parents:
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3637 wäre, den Boden ſelbſt getroffen haben. Steht hinge-
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parents:
diff changeset
3638 gen ein Gebäude mit ſeinem Ableiter an einer Stelle,
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parents:
diff changeset
3639 wo die poſitiv elektriſirte Zone ſehr dick iſt, ſo wird we-
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parents:
diff changeset
3640 der der Ableiter die Elektricität ſtillſchweigend abführen,
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parents:
diff changeset
3641 noch der Blitz dahin treffen; obgleich derſelbe vielleicht
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diff changeset
3642 einen weit niedriger liegenden Gegenſtand oder wohl gar
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parents:
diff changeset
3643 den Boden ſelbſt ganz nahe dabey treffen kann; aus der
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diff changeset
3644 Urſache, weil daſelbſt die poſitiv elektriſirte Zone dünner
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3645 iſt, als an dem Orte des Ableiters.</s></quote>
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diff changeset
3646 <quote><s xml:id="echoid-s1831" xml:space="preserve">Der Satz, daß ein zugeſpitzter Ableiter eine Ge-
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diff changeset
3647 witterwolke ihrer ganzen Elektricität berauben könne,
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parents:
diff changeset
3648 ſcheint auf den erſten Blick ſehr intereſſant, iſt aber,
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parents:
diff changeset
3649 wenn man ihn genau betrachtet, lächerlich. Unzähliche
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parents:
diff changeset
3650 Gegenſtände auf der Erdfläche ziehen die Elektrici-
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parents:
diff changeset
3651 tät eben ſo wohl an, als der Ableiter, wenn ſie ſich an-
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parents:
diff changeset
3652 ders aus der Wolke ziehen ließe; es iſt aber unmöglich,
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parents:
diff changeset
3653 dieſes zu bewirken, weil alle dieſe Gegenſtände einerley
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parents:
diff changeset
3654 Elektricität mit den Wolken ſelbſt haben.</s></quote>
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parents:
diff changeset
3655 <quote><s xml:id="echoid-s1832" xml:space="preserve">Ueberdies hat Beccaria beobachtet, daß während
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parents:
diff changeset
3656 des Fortgangs und Zunehmens der Gewitter, wenn
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parents:
diff changeset
3657 auch der Blitz noch ſo häufig in die Erde ſchlägt, den-
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parents:
diff changeset
3658 noch die Wolke den Augenblick darauf wieder bereit ſey,
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parents:
diff changeset
3659 eine noch größere Exploſion zu machen, und daß ſein
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diff changeset
3660 <pb o="117" file="0137" n="137" rhead="Von den zugeſpitzten Blitzableitern."/>
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parents:
diff changeset
3661 Apparatus nach dem Schlage immer noch ſo ſtark eletri-
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parents:
diff changeset
3662 ſirt geblieben ſey, als vor demſelben.</s></quote>
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parents:
diff changeset
3663 <quote><s xml:id="echoid-s1833" xml:space="preserve">Der Ableiter hat nicht einmal das Vermögen, den
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parents:
diff changeset
3664 Blitz um wenig Schuhe von der Richtung, die er ſich
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parents:
diff changeset
3665 ſelbſt@ gewählt hat, abzulenken: wir haben hievon ein ſehr
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3666 entſcheidendes Beyſpiel an dem Magazin zu Purſleet in
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parents:
diff changeset
3667 Eſſer geſehen. Dieſes Haus war mit einem Ableiter
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parents:
diff changeset
3668 verſehen, der über den höchſten Theil des Gebäudes her-
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parents:
diff changeset
3669 vorragte; demohngeachtet ſchlug ein Wetterſtral in eine
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parents:
diff changeset
3670 eiſerne Klammer an der Ecke des Gebäudes, welche weit
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parents:
diff changeset
3671 niedriger lag, als die Spitze des Ableiters, und von der-
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parents:
diff changeset
3672 ſelben nur 46 Schuh weit in einer abhangenden Linie
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parents:
diff changeset
3673 abſtand.</s></quote>
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parents:
diff changeset
3674 <quote><s xml:id="echoid-s1834" xml:space="preserve">Hier war der Ableiter, mit aller ſeiner Kraſt, die
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parents:
diff changeset
3675 Elektricität auszuziehen, nicht im Stande, den Schlag
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parents:
diff changeset
3676 zu verhüten, noch ihn 46 Schuh weit von ſeinem Wege
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3677 abzulenken. In der That verhielt ſich die Sache ſo.
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parents:
diff changeset
3678 Der Blitz ward beſtimmt, an dem Orte, wo das Schif-
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3679 magazin ſteht, oder nahe dabey, in die Erde zu gehen;
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parents:
diff changeset
3680 der am Hauſe befindliche Ableiter bot ihm zwar an ſich
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parents:
diff changeset
3681 den leichteſten Weg dar, allein da ſich 40 Schuh Luft
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3682 zwiſchen der Spitze des Ableiters und der Stelle der Er-
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parents:
diff changeset
3683 ploſion befanden, ſo war der Widerſtand geringer, wenn
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parents:
diff changeset
3684 der Blitz durch die ſtumpfe eiſerne Klammer und einige
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parents:
diff changeset
3685 wenige vom Regen befeuchtete Ziegel in die Seite der
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parents:
diff changeset
3686 metalliſchen Leitung gieng, als wenn er ſeinen Weg
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parents:
diff changeset
3687 durch 46 Schuh Luft in die Spitze des Ableiters nahm;
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parents:
diff changeset
3688 und in der That folgte er auch dem erſtern Wege.</s></quote>
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parents:
diff changeset
3689 <quote><s xml:id="echoid-s1835" xml:space="preserve">Die Blitze, welche im Zikzak gehen, ſind die ge-
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
3690 ſährlichſten, weil ſie einen ſehr heftigen Widerſtand in
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3691 der Atmoſphäre überwinden müſſen. Wenn ſie alſo ir-
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parents:
diff changeset
3692 gendwo einen nur im geringſten Grade ſchwächern Wider-
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parents:
diff changeset
3693 ſtand antreffen, ſo ſchlagen ſie unfehlbar dahin, auch
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parents:
diff changeset
3694 bis auf eine beträchtliche Weite. Ganz anders iſt es
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parents:
diff changeset
3695 mit denjenigen Blitzen, we@che unter keiner beſtimmten
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3696 Geſtalt erſcheinen: bey ihnen wird die elektriſche Mate-
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casties
parents:
diff changeset
3697 <pb o="118" file="0138" n="138" rhead="Neuntes Capitel."/>
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parents:
diff changeset
3698 rie augenſcheinlich durch leitende Subſtanzen zerſtreut,
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parents:
diff changeset
3699 und ihre Kraft dadurch vermindert.</s></quote>
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parents:
diff changeset
3700 <quote><s xml:id="echoid-s1836" xml:space="preserve">Die allerverderblichſten Blitze aber ſind diejenigen,
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parents:
diff changeset
3701 welche die Form der Feuerbälle annehmen. Dieſe ent-
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casties
parents:
diff changeset
3702 ſtehen durch eine außerordentlich große Gewalt der Elek-
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
3703 tricität, die ſich nach und nach anhäufet, bis der Wider-
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parents:
diff changeset
3704 ſtand der Atmoſphäre nicht mehr vermögend iſt, ſie zu-
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
3705 ſammen zu halten. Gemeiniglich brechen die Blitze
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
3706 aus der elektriſirten Wolke durch Annäherung einer lei-
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casties
parents:
diff changeset
3707 tenden Subſtanz aus; allein dieſe Feuerbälle ſcheinen
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parents:
diff changeset
3708 nicht durch eine Subſtanz, welche die elektriſche Materie
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casties
parents:
diff changeset
3709 der Wolke an÷ſich zieht, zu entſtehen, ſondern bloß da-
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parents:
diff changeset
3710 her, weil ſich die Elektricität in ſolcher Menge anhäuft,
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parents:
diff changeset
3711 daß die Wolke ſie nicht länger halten kann. Daher ge-
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parents:
diff changeset
3712 hen dieſe Bälle langſam fort, haben keine beſtimmte
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parents:
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3713 Richtung, und es zeigt ſogleich ihr Anſehen eine unge-
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parents:
diff changeset
3714 mein ſtarke Anhäufung und Bewegung der Elektricität
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parents:
diff changeset
3715 in der Atmoſphäre an, ohne eine verhältnißmäßige Dis-
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parents:
diff changeset
3716 poſition der Erde, ſie aufzunehmen. Inzwiſchen wird
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parents:
diff changeset
3717 dieſe Diſpoſition durch tauſenderley Umſtände verändert,
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parents:
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3718 und diejenige Stelle, welche am erſten fahig wird, Elek-
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parents:
diff changeset
3719 tricität aufzunehmen, wird auch zuerſt von dem Feuer-
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parents:
diff changeset
3720 balle getroffen. Man ſieht daher, daß ſich die Blitze
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parents:
diff changeset
3721 dieſer Art eine lange Zeit langſam in der Luft vor- und
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parents:
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3722 rückwärts bewegen, und dann plötzlich auf ein oder auf
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parents:
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3723 mehrere Gebäude fallen, je nachdem dieſelben zu der Zeit
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parents:
diff changeset
3724 mehr oder weniger von der entgegengeſetzten Elektricität
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parents:
diff changeset
3725 enthalten. Sie laufen auch wohl längſt dem Erdboden
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parents:
diff changeset
3726 hin, theilen ſich in mehrere Theile, und veranlaſſen
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diff changeset
3727 mehrere Schläge auf einmal.</s></quote>
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diff changeset
3728 <quote><s xml:id="echoid-s1837" xml:space="preserve">Es iſt ſehr ſchwer, dieſe Art von Blitzen durch
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diff changeset
3729 unſere elektriſchen Verſuche nachzuahmen. Die einzi-
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diff changeset
3730 gen Fälle, in welchen dieſes einigermaßen geſchehen iſt,
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parents:
diff changeset
3731 ſind diejenigen, in welchen D. Drieſtley den Schlag
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parents:
diff changeset
3732 einer Batterie durch eine beträchtliche Weite über die
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parents:
diff changeset
3733 Oberfläche von rohem Fleiſch, Waſſer @. gehen ließ.
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diff changeset
3734 <pb o="119" file="0139" n="139" rhead="Von den zugeſpitzten Blitzableitern."/>
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diff changeset
3735 Wenn es in dieſen Fällen während der Zeit, in welcher
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parents:
diff changeset
3736 die elektriſche Materie über die Oberfläche des Fleiſches
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diff changeset
3737 gieng, möglich wäre, die metalliſche Verbindung durch
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diff changeset
3738 Wegnehmung der Kette zu unterbrechen, ſo wäre die
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parents:
diff changeset
3739 entladene elektriſche Meterie genau in dem Falle der er-
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parents:
diff changeset
3740 wähnten Feuerbälle; d. i. ſie hätte keinen Leiter, der ſie
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parents:
diff changeset
3741 weiter führen könnte. Die negative Seite der Batterie
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diff changeset
3742 wäre der Ort ihrer Beſtimmung, ſie könnte aber nicht
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diff changeset
3743 leicht dahin gelangen, wegen der im Wege liegenden
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diff changeset
3744 großen Menge von Luft, und der Unfähigkeit der
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diff changeset
3745 benachbarten Körper, Elektricität aufzunehmen. Wenn
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diff changeset
3746 nun aber während der Zeit, in welcher die elektriſche
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diff changeset
3747 Materie aus Mangel eines Leiters ſtill ſtünde, jemand
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diff changeset
3748 in der Nähe der negativen Seite der Batterie wäre,
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diff changeset
3749 oder dieſelbe berührte, und zugleich ſeinen Finger gegen
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parents:
diff changeset
3750 dieſen dem Anſcheine nach unſchädlichen hellen Körper
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parents:
diff changeset
3751 hielte, ſo würde er augenblicklich einen ſtarken Schlag
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parents:
diff changeset
3752 erhalten, weil nunmehr durch ſeinen Körper eine freye
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parents:
diff changeset
3753 Verbindung entſtünde, und die Kräfte, durch welche die
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parents:
diff changeset
3754 elektriſche Materie von einer Stelle zur andern getrieben
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diff changeset
3755 wird, dieſelbe durch ihn führen würden. Nehmen wir
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parents:
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3756 aber an, eine mit der Batterie nicht verbundene Perſon
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parents:
diff changeset
3757 halte den Finger gegen dieſen Körper, ſo würde dieſe
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3758 vielleicht einen gelinden Funken, aber keinen beträchtli-
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3759 chen Schlag von demſelben erhalten.</s></quote>
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diff changeset
3760 <quote><s xml:id="echoid-s1838" xml:space="preserve">Hieraus läßt ſich die dem Anſcheine nach ſo eigen-
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parents:
diff changeset
3761 ſinnige Natur aller Blitze, beſonders aber derer, welche
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parents:
diff changeset
3762 in Form der Feuerbälle erſcheinen, erklären. Biswei-
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parents:
diff changeset
3763 len treffen ſie Väume, hohe Gebäude u. dgl. ohne be-
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parents:
diff changeset
3764 nachbarte Hütten, Menſchen, Thiere @. zu beſchädi-
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parents:
diff changeset
3765 gen; zu andern Zeiten ſchlagen ſie auf niedrige Gebäu-
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parents:
diff changeset
3766 de, Viehheerden @, indeß hohe Bäume und Thürme
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3767 in der Nachbarſchaft verſchont bleiben. <anchor type="note" xlink:label="note-0139-01a" xlink:href="note-0139-01" symbol="*)"/> Die Urſache
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3768 <pb o="120" file="0140" n="140" rhead="Neuntes Capitel."/>
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3769 hievon iſt, weil es unter der Erdfläche eine Zone giebt,
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parents:
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3770 in welche der Blitz (wenn man ſich ſo ausdrücken darf)
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3771 zu ſchlagen ſucht, weil ſie eine dem Blitze ſelbſt entge-
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3772 gengeſetzte Elektricität hat. Es werden daher diejeni-
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parents:
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3773 gen Gegenſtände vom Blitze getroffen, welche die voll-
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parents:
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3774 kommenſten Leiter zwiſchen den elektriſirten Wolken und
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parents:
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3775 der gedachten Zone ausmachen, ſie mögen hoch oder nie-
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3776 drig ſeyn. Geſetzt, es bilde ſich über einem gewiſſen
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parents:
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3777 Theile der Erdfläche eine poſitive Wolke; ſo geht die
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parents:
diff changeset
3778 elektriſche Materie aus derſelben zuerſt in den rund
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parents:
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3779 umher liegenden Theil der Atmoſphäre aus, und wäh-
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diff changeset
3780 rend dieſer Zeit iſt die Atmoſphäre negativ elektriſirt.
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3781 Je größere Theile der Atmoſphäre inzwiſchen dieſer elek-
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diff changeset
3782 triſche Strom durchläuft, deſto mehr wächſt der Wider-
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3783 ſtand gegen ſeine Bewegung, bis zuletzt die Luft eben ſo
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3784 wohl, als die Wolke, poſitiv elektriſiret wird, und bey-
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3785 de als ein einziger Körper wirken. Dann fängt die Erd-
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parents:
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3786 fläche an elektriſiret zu werden, und nimmt vermittelſt
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3787 der auf ihr wachſenden Bäume, des Graſes u. ſ. w. die
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parents:
diff changeset
3788 elektriſche Materie ſtillſchweigend auf, bis ſie zuletzt
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3789 ebenfalls poſitiv elektriſiret wird, und einen Strom von
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parents:
diff changeset
3790 Elektricität von der Oberfläche niederwärts auszuſenden
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3791 anfängt.</s></quote>
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3792 <div xml:id="echoid-div184" type="float" level="2" n="1">
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3793 <note symbol="*" position="foot" xlink:label="note-0139-01" xlink:href="note-0139-01a" xml:space="preserve">Hievon führt Herr Achard in einer der berliner Aka-<lb/>demie vorgeleſenen Abhandlung zwey merkwürdige Bey-<lb/>ſpiele an. Und Beccaria warnt @edermann, ſich bey <lb/>Gewittern mit einem hühern, oder beſſern Leiter zu ver-<lb/>binden, als der menſchliche Körper an ſich ſelbſt iſt.</note>
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3794 </div>
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diff changeset
3795 <quote><s xml:id="echoid-s1839" xml:space="preserve">Wenn die Urſachen, welche die Elektricität anfäng-
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parents:
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3796 lich hervorbrachten, noch immer zu wirken fortfahren, ſo
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3797 wird die Kraft des elektriſchen Stroms ungemein groß.
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3798 Nunmehr fängt die Gefahr eines Wetterſchlags an;
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3799 denn da die Kraft des Blitzes auf eine Stelle unterhalb
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diff changeset
3800 der Erdfläche gerichtet iſt, ſo wird derſelbe gewiß gegen
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3801 dieſe Stelle ſchlagen, und alles, was ſeinem Durch-
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3802 gange widerſteht, zerſchmettern.</s></quote>
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3803 <quote><s xml:id="echoid-s1840" xml:space="preserve">Nunmehr wird ſich auch der Nutzen der Ableiter
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3804 deutlich zeigen. Denn wir wiſſen zuverläßig, daß die
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3805 <pb o="121" file="0141" n="141" rhead="Von den zugeſpitzten Blitzableitern."/>
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3806 elektriſche Materie in allen Fällen denjenigen Weg vor-
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3807 ziehe, wo ſie den wenigſten Widerſtand findet, d. i. den
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3808 Weg über die Oberfläche der Metalle. Steht alſo in
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3809 einem ſolchen Falle ein mit einem Ableiter verſehenes
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3810 Haus gerade unter der Wolke, und befindet ſich zugleich
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3811 eine Zone von negativ elektriſirtem Erdreich nicht fern
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3812 von dem Grunde des Gebäudes, ſo wird der Blitz faſt
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3813 zuverläßig in den Ableiter ſchlagen; das Gebäude aber
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3814 wird unbeſchädigt bleiben. Hat hingegen das Gebäude
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3815 keinen Ableiter, ſo wird der Blitz demohngeachtet an
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3816 eben der Stelle einſchlagen, um in die obenerwähnte
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3817 elektriſirte Zone zu kommen; jetzt aber wird das Gebäu-
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3818 de beſchädiget, weil die Materialien deſſelben die elektri-
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3819 ſche Materie nicht leicht leiten können. <anchor type="note" xlink:href="" symbol="*)"/></s></quote>
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3820 </div>
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3821 <div xml:id="echoid-div186" type="section" level="1" n="180">
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3822 <head xml:id="echoid-head198" xml:space="preserve">Zehntes Capitel.</head>
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3823 <head xml:id="echoid-head199" xml:space="preserve">Ladung einer Luftplatte.</head>
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3824 <p>
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3825 <s xml:id="echoid-s1841" xml:space="preserve">Da die Luft ein idioelektriſcher Körper iſt, ſo nimmt <lb/>ſie auch, wie alle dergleichen Körper, eine Ladung <lb/>an. </s>
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3826 <s xml:id="echoid-s1842" xml:space="preserve">Aus dieſer Eigenſchaft der Luft laſſen ſich viele Er-<lb/>ſcheinungen bey den gewöhnlichen elektriſchen Verſuchen <lb/>erklären; </s>
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3827 <s xml:id="echoid-s1843" xml:space="preserve">denn die Luft, welche einen elektriſirten Leiter <lb/>
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3828 <anchor type="note" xlink:label="note-0141-01a" xlink:href="note-0141-01"/>
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3829 <pb o="122" file="0142" n="142" rhead="Zehntes Capitel."/>
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3830 umgiebt, iſt allezeit einigermaßen mit elektriſcher Materie <lb/>geladen, und wirkt alſo auf die Atmoſphäre des elektriſir-<lb/>ten Leiters nicht allein durch ihren Druck, ſondern auch <lb/>durch ihre elektriſche Kraft. </s>
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3831 <s xml:id="echoid-s1844" xml:space="preserve">Daß aber die Elektricität <lb/>durch eine beträchtliche Menge Luft dringen könne, iſt <lb/>daraus klar, weil man die Luft eines Zimmers auf ver-<lb/>ſchiedene Art elektriſiren kann.</s>
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3832 <s xml:id="echoid-s1845" xml:space="preserve"/>
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3833 </p>
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3834 <div xml:id="echoid-div186" type="float" level="2" n="1">
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3835 <note symbol="*" position="foot" xlink:label="note-0141-01" xlink:href="note-0141-01a" xml:space="preserve">“Daß die elektriſche Materie, welche die Gewitterwol-<lb/>ken bildet und belebet, aus Stellen komme, welche tief <lb/>unter der Erdfläche liegen, und ſich in dieſen Stellen <lb/>entzünde, iſt wahrſcheinlich, wegen der tiefen Höhlen, <lb/>welche der Blitz an vielen Orten macht, und wegen der <lb/>gewaltſamen Ueberſchwemmungen bey Gewittern, wel-<lb/>che nicht durch Regen, ſondern durch Waſſer entſte-<lb/>hen, welches aus dem Innerſten der Erde bervorbricht, <lb/>und durch eine innere Erſchütterung aus derſelben <lb/>muß ſeyn getrieben worden.” ſ. Prieſtleys Geſchichte <lb/>der Elektricität. S. 328.</note>
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3836 </div>
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3837 <p>
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3838 <s xml:id="echoid-s1846" xml:space="preserve">Man überziehe zwey große Breter mit Stanniol, <lb/>hänge das eine mit ſeidnen Schnüren an der Deck@ <lb/>des Zimmers auf, verbinde es mit dem Conductor der <lb/>Maſchine, und ſtelle das zweyte parallel mit dem erſten <lb/>auf ein iſolirendes Stativ, das man leicht erhöhen oder <lb/>erniedrigen kann, um die Entfernung beyder Breter nach <lb/>Gefallen zu verändern. </s>
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3839 <s xml:id="echoid-s1847" xml:space="preserve">Man kann auch beyde in verti-<lb/>kaler Stellung auf iſolirende Stative von gleicher Höh@ <lb/>ſetzen, welches letztere in den meiſten Fällen als das be-<lb/>quemſte wird befunden werden. </s>
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3840 <s xml:id="echoid-s1848" xml:space="preserve">Dieſe Breter ſind als <lb/>Belegungen der zwiſchen ihnen befindlichen Luftplatte an-<lb/>zuſehen.</s>
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3841 <s xml:id="echoid-s1849" xml:space="preserve"/>
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3842 </p>
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3843 </div>
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3844 <div xml:id="echoid-div188" type="section" level="1" n="181">
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3845 <head xml:id="echoid-head200" xml:space="preserve">152. Verſuch.</head>
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3846 <p>
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3847 <s xml:id="echoid-s1850" xml:space="preserve">Man verbinde das obere Bret mit dem poſitiven <lb/>Conductor, das andere mit dem Boden, und drehe den <lb/>Cylinder, ſo wird das obere poſitiv, das untere negativ <lb/>elektriſiret. </s>
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3848 <s xml:id="echoid-s1851" xml:space="preserve">Die Luft zwiſchen beyden wirkt nunmehr, wie <lb/>eine Glasplatte, ſie trennt beyde Elektricitäten, und hält <lb/>ſie auseinander. </s>
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3849 <s xml:id="echoid-s1852" xml:space="preserve">Berührt man die negative Platte mit <lb/>einer Hand, und die obere mit der andern, ſo erhält man <lb/>einen Schlag, welcher dem aus einer leidner Flaſche ähn-<lb/>lich iſt.</s>
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3850 <s xml:id="echoid-s1853" xml:space="preserve"/>
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3851 </p>
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3852 <p>
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3853 <s xml:id="echoid-s1854" xml:space="preserve">Man fühlt den elektriſchen Schlag allezeit, wenn ei-<lb/>ne Menge elektriſcher Materie plötzlich und in einem Au-<lb/>genblicke durch den Körper geht. </s>
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3854 <s xml:id="echoid-s1855" xml:space="preserve">Die Stärke des Schlags <lb/>ſteht mit der Menge der angehäuften Elektricität und mit <lb/>der Schwierigkeit ihres Durchgangs im Verhältniß; </s>
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3855 <s xml:id="echoid-s1856" xml:space="preserve">denn <lb/>die ganze Wirkſamkeit der Elektricität hängt von ihrer An-
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3856 <pb o="123" file="0143" n="143" rhead="Ladung einer Luftplatte."/>
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3857 ſtrengung oder von der Kraft ab, mit welcher ſie von dem <lb/>elektriſirten Körper auszugehen ſtrebt.</s>
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3858 <s xml:id="echoid-s1857" xml:space="preserve"/>
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3859 </p>
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3860 <p>
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3861 <s xml:id="echoid-s1858" xml:space="preserve">Wenn ſich beyde Platten oder Breter in entgegen-<lb/>geſetztem Zuſtande befinden, ſo ziehen ſie einander ſtark <lb/>an, und kommen zuſammen, wofern ſie nicht mit Gewalt <lb/>auseinander gehalten werden. </s>
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3862 <s xml:id="echoid-s1859" xml:space="preserve">Bisweilen entſteht ein <lb/>Funken zwiſchen beyden, und hebt beyder Elektricitäten <lb/>auf. </s>
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3863 <s xml:id="echoid-s1860" xml:space="preserve">Befindet ſich auf der untern Platte eine Erhöhung, <lb/>ſo wird der Funken bey der freywilligen Entladung dieſelbe <lb/>treffen. </s>
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3864 <s xml:id="echoid-s1861" xml:space="preserve">Die Verſuche mit dieſen Platten werden noch an-<lb/>genehmer, wenn die eine Fläche der obern Platte mit ver-<lb/>goldetem Leder überzogen iſt. </s>
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3865 <s xml:id="echoid-s1862" xml:space="preserve">Beyde Platten, wenn ſie <lb/>geladen ſind, ſtellen den Zuſtand der Erde und der Wol-<lb/>ken bey einem Gewitter vor. </s>
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3866 <s xml:id="echoid-s1863" xml:space="preserve">Die Wolken befinden ſich <lb/>in dem einen, und die Erde im entgegengeſetzten elektri-<lb/>ſchen Zuſtande: </s>
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3867 <s xml:id="echoid-s1864" xml:space="preserve">die dazwiſchen liegende Luftplatte wirkt <lb/>als ein elektriſcher Körper, und die freywilligen Entla-<lb/>dungen ſtellen die Erſcheinungen des Blitzes dar.</s>
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3868 <s xml:id="echoid-s1865" xml:space="preserve"/>
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3869 </p>
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3870 <p>
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3871 <s xml:id="echoid-s1866" xml:space="preserve">Man hat bey dieſem Verſuche eine Bemerkung ge-<lb/>macht, welche auf einen der vornehmſten Grundſätze der <lb/>angenommenen Theorie Beziehung zu haben ſcheint. </s>
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3872 <s xml:id="echoid-s1867" xml:space="preserve">Ich <lb/>habe ſie hier beyfügen wollen, um denen, welche ſich mit <lb/>der Elektricität beſchäftigen, Anlaß zu genauerer Unter-<lb/>ſuchung der Sache zu geben.</s>
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3873 <s xml:id="echoid-s1868" xml:space="preserve"/>
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3874 </p>
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3875 <p>
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3876 <s xml:id="echoid-s1869" xml:space="preserve">Es ſcheint bey dieſem Verſuche faſt unmöglich, zu <lb/>läugnen, daß die Luft von der elektriſchen Materie durch-<lb/>drungen werde. </s>
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3877 <s xml:id="echoid-s1870" xml:space="preserve">Der Abſtand beyder Platten von einan-<lb/>der iſt ſo gering, daß es thöricht ſcheint, zu behaupten, <lb/>dieſer Raum werde bloß von einer zurückſtoßenden Kraft <lb/>durchdrungen, da wir zumal in andern Fällen die elektri-<lb/>ſche Materie durch weit größere Lufträume dringen ſehen. <lb/></s>
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3878 <s xml:id="echoid-s1871" xml:space="preserve">Wenn aber einmal eine elektriſche Subſtanz ſich von der <lb/>elektriſchen Materie durchdringen läßt, ſo entſteht wenig-<lb/>ſtens eine ſehr ſtarke Vermuthung, daß alle übrigen die <lb/>elektriſche Materie ebenfalls durchlaſſen. </s>
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3879 <s xml:id="echoid-s1872" xml:space="preserve">Wenn alles Glas <lb/>für die elektriſche Materie undurchdringlich wäre ſo müßte
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3880 <pb o="124" file="0144" n="144" rhead="Zehntes Capitel."/>
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3881 man natürlicher Weiſe ſchließen, daß dieſe Materie ſehr <lb/>leicht über die Oberfläche deſſelben gehen werde. </s>
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3882 <s xml:id="echoid-s1873" xml:space="preserve">Statt <lb/>deſſen aber iſt vielmehr ihr Beſtreben in das Glas einzu-<lb/>dringen ſo groß, daß ein zwiſchen zwoen hart aneinander <lb/>gepreßten Glasplatten durchgehender Schlag dieſe Plat-<lb/>ten allezeit in Stücken bricht, und einen Theil davon ſo-<lb/>gar zum feinſten Pulver zermalmet. </s>
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3883 <s xml:id="echoid-s1874" xml:space="preserve">Dieſe Wirkung kan <lb/>keiner andern Urſache zugeſchrieben werden, als dieſer, daß <lb/>die elektriſche Materie in die Zwiſchenräume des Glaſes <lb/>eindringt, und daß bey dem Widerſtande, den ſie daſelbſt <lb/>antrift, die Gewalt ihrer fortgehenden Bewegung die <lb/>Glastheilchen nach allen Richtungen mit Heftigkeit von <lb/>einander tre@bt.</s>
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3884 <s xml:id="echoid-s1875" xml:space="preserve"/>
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3885 </p>
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3886 </div>
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3887 <div xml:id="echoid-div189" type="section" level="1" n="182">
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3888 <head xml:id="echoid-head201" xml:space="preserve">153. Verſuch.</head>
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3889 <p>
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3890 <s xml:id="echoid-s1876" xml:space="preserve">Man kehre die mit vergoldetem Leder überzogene <lb/>Seite des obern Brets gegen das untere, ſtelle eine oder <lb/>zwo metallene Halbkugeln auf das untere Bret; </s>
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3891 <s xml:id="echoid-s1877" xml:space="preserve">verbinde <lb/>das obere mit dem poſitiven, das untere mit dem negati-<lb/>ven Conductor, und ſetze die Maſchine in Bewegung, ſo <lb/>wird das obere Bret ſeinen ganzen Vorrath von elektri-<lb/>ſcher Materie in einem ſtarken Strale mit einer heftigen <lb/>Exploſion an eine von den Halbkugeln abgeben; </s>
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3892 <s xml:id="echoid-s1878" xml:space="preserve">und man <lb/>wird an der Oberfläche des vergoldeten Leders lebhafte <lb/>Stralen des elektriſchen Lichts in verſchiedenen Richtungen <lb/>ſehen. </s>
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3893 <s xml:id="echoid-s1879" xml:space="preserve">“Dieſer Verſuch,” ſagt Becket, “iſt dem Blitze <lb/>mehr als ähnlich, es iſt die Natur ſelbſt, mit ihrem <lb/>eignen Gewand angethan.</s>
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3894 <s xml:id="echoid-s1880" xml:space="preserve">”</s>
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3895 </p>
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3896 <p>
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3897 <s xml:id="echoid-s1881" xml:space="preserve">Verbindet man eine belegte Flaſche mit dem poſitiven <lb/>Conductor ſo, daß ſie mit den Bretern zugleich entladen <lb/>werden kan, ſo werden ſich die Lichtſtralen noch weiter aus-<lb/>breiten, und der Schlag wird noch ſtärker ſeyn.</s>
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3898 <s xml:id="echoid-s1882" xml:space="preserve"/>
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3899 </p>
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3900 </div>
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3901 <div xml:id="echoid-div190" type="section" level="1" n="183">
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3902 <head xml:id="echoid-head202" xml:space="preserve">154. Verſuch.</head>
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3903 <p>
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3904 <s xml:id="echoid-s1883" xml:space="preserve">Man ſtecke den Drath, Fig. </s>
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3905 <s xml:id="echoid-s1884" xml:space="preserve">10, mit den daran be-<lb/>feſtigten Federn mitten in das eine Bret, ſo werden ſie
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3906 <pb o="125" file="0145" n="145" rhead="Ladung einer Luftplatte."/>
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3907 in dieſer Stellung nicht ſo ſtark divergiren, als wenn ſie <lb/>an den Rand des Brets geſetzt werden. </s>
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3908 <s xml:id="echoid-s1885" xml:space="preserve">Legt man eine <lb/>Pflaumfeder nahe an den Rand des Brets, ſo fliegt ſie <lb/>heraus, und dem nächſten Leiter zu; </s>
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3909 <s xml:id="echoid-s1886" xml:space="preserve">ſetzt man ſie aber in <lb/>die Mitte, ſo dauert es ſehr lang, ehe ſie ſich bewegt, und <lb/>ſie giebt kaum das geringſte Zeichen einer Anziehung <lb/>von ſich.</s>
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3910 <s xml:id="echoid-s1887" xml:space="preserve"/>
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3911 </p>
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3912 </div>
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3913 <div xml:id="echoid-div191" type="section" level="1" n="184">
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3914 <head xml:id="echoid-head203" xml:space="preserve">155. Verſuch.</head>
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3915 <p>
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3916 <s xml:id="echoid-s1888" xml:space="preserve">Man ſtreue Kleyen oder kleine Stückchen Papier <lb/>auf die Mitte des untern Brets; </s>
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3917 <s xml:id="echoid-s1889" xml:space="preserve">wenn nun die Maſchine <lb/>in Bewegung geſetzt wird, ſo werden dieſelben ſehr ſchnell <lb/>wechſelsweiſe angezogen und zurückgeſtoßen, und auf eine <lb/>ſehr beluſtigende Art hin und her getrieben. </s>
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3918 <s xml:id="echoid-s1890" xml:space="preserve">Eine ange-<lb/>nehme Veränderung kan man mit dieſem Verſuche ma-<lb/>chen, wenn man die Kette von dem untern Brete abnimmt, <lb/>und es von zu Zeit Zeit mit der Hand berührt: </s>
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3919 <s xml:id="echoid-s1891" xml:space="preserve">berührt <lb/>man alsdann beyde Breter zugleich, ſo hört die Bewegung <lb/>auf. </s>
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3920 <s xml:id="echoid-s1892" xml:space="preserve">Die auffallendſte Erſcheinung bey dieſem Verſuche <lb/>aber iſt, daß bisweilen, wenn die Elektricität ſtark iſt, <lb/>eine Menge Papier oder Kleyen ſich auf einem Orte an-<lb/>häufet, und eine Art von Säule zwiſchen beyden Bretern <lb/>bildet, welche plötzlich eine ſchnelle horizontale Bewegung <lb/>annimmt, und wie eine Waſſerhoſe, nach dem Rande der <lb/>Breter zu läuft, wo ſie ſich zerſtreuet, und bis auf eine <lb/>beträchtliche Weite im Zimmer herumgeworfen wird.</s>
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3921 <s xml:id="echoid-s1893" xml:space="preserve"/>
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3922 </p>
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3923 </div>
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3924 <div xml:id="echoid-div192" type="section" level="1" n="185">
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3925 <head xml:id="echoid-head204" xml:space="preserve">156. Verſuch.</head>
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3926 <p>
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3927 <s xml:id="echoid-s1894" xml:space="preserve">Man nehme zwo Flaſchen, deren eine poſitiv, die <lb/>andere negativ geladen iſt, ſtelle ſie auf das iſolirte Bret <lb/>ſo weit von einander, als die Größe des Brets zuläßt; <lb/></s>
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3928 <s xml:id="echoid-s1895" xml:space="preserve">und ſtelle eine Reihe Lichter in einc<unsure/> hölzerne Tülle, jedes <lb/>zween Zoll weit von dem andern entfernt und ſo, daß die <lb/>Flammen mit einander genau parallel laufen. </s>
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3929 <s xml:id="echoid-s1896" xml:space="preserve">Bringt <lb/>man nun dieſe Lichter plötzlich zwiſchen die Knöpfe beyder
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3930 <pb o="126" file="0146" n="146" rhead="Eilftes Capitel."/>
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3931 Flaſchen, ſo ſieht man den Funken durch alle Flammen <lb/>durchſchlagen, und hat die Erſcheinung einer Linie von <lb/>Feuer, die ſich in tauſenderley verſchiedene Krümmungen <lb/>vertheilt.</s>
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3932 <s xml:id="echoid-s1897" xml:space="preserve"/>
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3933 </p>
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3934 </div>
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3935 <div xml:id="echoid-div193" type="section" level="1" n="186">
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3936 <head xml:id="echoid-head205" xml:space="preserve">Eilftes Capitel.</head>
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3937 <head xml:id="echoid-head206" xml:space="preserve">Vom Elektrophor.</head>
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3938 <p>
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3939 <s xml:id="echoid-s1898" xml:space="preserve">Fig. </s>
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3940 <s xml:id="echoid-s1899" xml:space="preserve">74 zeigt einen Elektrophor. </s>
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3941 <s xml:id="echoid-s1900" xml:space="preserve">Der Erfinder dieſes <lb/>Inſtruments iſt Herr Volta <anchor type="note" xlink:href="" symbol="*)"/> von Como in Ita-
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3942 lien. </s>
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3943 <s xml:id="echoid-s1901" xml:space="preserve">Es beſteht aus zwo kreisrunden Platten: </s>
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3944 <s xml:id="echoid-s1902" xml:space="preserve">die untere <lb/>iſt von Meſſing mit einem Ueberzuge von einer idioelektri-<lb/>ſchen Subſtanz bedeckt, insgemein von einem negativ elek-<lb/>triſchen Körper, z.</s>
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3945 <s xml:id="echoid-s1903" xml:space="preserve">B. </s>
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3946 <s xml:id="echoid-s1904" xml:space="preserve">Siegellak, Schwefel @.</s>
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3947 <s xml:id="echoid-s1905" xml:space="preserve">: die obere <lb/>iſt von Meſſing, und hat einen gläſernen in die Mitte ih-<lb/>rer obern Fläche eingeſchraubten Handgrif.</s>
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3948 <s xml:id="echoid-s1906" xml:space="preserve"/>
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3949 </p>
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3950 <p>
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3951 <s xml:id="echoid-s1907" xml:space="preserve">Harzige elektriſche Körper thun bey dem Elektrophor <lb/>beſſere Dienſte, als Glas, nicht allein darum, weil ſie die <lb/>Feuchtigkeit aus der Luft nicht ſo ſtark anziehen, ſondern <lb/>auch, weil ſie allem Anſchein nach das Vermögen beſi-<lb/>tzen, die ihnen mitgetheilte Elektricität länger an ſich zu <lb/>halten.</s>
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3952 <s xml:id="echoid-s1908" xml:space="preserve"/>
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3953 </p>
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3954 <note symbol="*" position="foot" xml:space="preserve">Zwar hat ſchon Herr Wilke in den Abhandl. der kö-<lb/>niglich ſchwediſchen Akademie der Wiſſenſchaften vom Jahre <lb/>1762 eine Vorrichtung beſchrieben, welche im Grunde nichts <lb/>anders, als ein Elektrophor, iſt. Herr Volta aber gab 1775 <lb/>dieſem Werkzeuge die gegenwärtige bequeme Einrichtung, und <lb/>den Namen. Dieſes Werkzeug gehört jetzt unter die vornehm-<lb/>ſten Theile der elektriſchen Geräthſchaft. Man ſ. darüber die <lb/>Zuſätze des Ueberſetzers zu Cavallo’s Abhandlung der Lebre <lb/>von der Elektricität, zw@te Aufl. S. 302 u. f. und die da-<lb/>ſelbſt angeführten Schriften.</note>
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3955 <pb o="127" file="0147" n="147" rhead="Vom Elektrophor."/>
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3956 <p>
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3957 <s xml:id="echoid-s1909" xml:space="preserve">Wenn man dieſes Inſtrument gebrauchen will, ſo <lb/>erregt man zuerſt die Elektricität der untern Platte, in-<lb/>dem man ihre überzogene Seite mit einem reinen und <lb/>trocknen Stück Flanell oder Haſenfell reibt; </s>
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3958 <s xml:id="echoid-s1910" xml:space="preserve">hierauf legt <lb/>man dieſe Platte auf den Tiſch, den elektriſchen Ueberzug <lb/>oberwärts gekehrt. </s>
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3959 <s xml:id="echoid-s1911" xml:space="preserve">Zweytens ſtellt man die Metallplatte <lb/>auf den elektriſchen Ueberzug, wie bey Fig. </s>
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3960 <s xml:id="echoid-s1912" xml:space="preserve">74 und 75. <lb/></s>
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3961 <s xml:id="echoid-s1913" xml:space="preserve">Drittens berührt man die Metallplatte mit dem Finger, <lb/>oder mit einem andern Leiter. </s>
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3962 <s xml:id="echoid-s1914" xml:space="preserve">Viertens hebt man die <lb/>Metallplatte mit dem gläſernen Handgrif von dem elektri-<lb/>ſchen Ueberzuge ab. </s>
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3963 <s xml:id="echoid-s1915" xml:space="preserve">Wenn nun dieſelbe bis auf einige <lb/>Weite von der untern Platte erhoben wird, ſo findet man <lb/>ſie ſtark elektriſiret, und zwar auf eine der Elektricität der <lb/>untern Platte entgegengeſetzte Art; </s>
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3964 <s xml:id="echoid-s1916" xml:space="preserve">ſie giebt einem ihr ge-<lb/>näherten Leiter einen Funken. </s>
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3965 <s xml:id="echoid-s1917" xml:space="preserve">Wiederhohlt man das <lb/>Verfahren, d. </s>
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3966 <s xml:id="echoid-s1918" xml:space="preserve">i. </s>
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3967 <s xml:id="echoid-s1919" xml:space="preserve">ſetzt man die Metallplatte von neuem <lb/>auf den elektriſchen Ueberzug, und berührt ſie mit dem <lb/>Finger, ſo kan man ohne neue Reibung des elektriſchen <lb/>Ueberzugs eine große Menge Funken, einen nach dem an-<lb/>dern, erhalten.</s>
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3968 <s xml:id="echoid-s1920" xml:space="preserve"/>
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3969 </p>
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3970 <p>
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3971 <s xml:id="echoid-s1921" xml:space="preserve">Folgende Verſuche ſind in der Abſicht angeſtellet wor-<lb/>den, um dieſes merkwürdige kleine Inſtrument zu unter-<lb/>ſuchen, und finden ſich in einer Abhandlung des Herrn <lb/>Acha@d in den Schriften der Berliner Akademie vom <lb/>Jahre 1776.</s>
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3972 <s xml:id="echoid-s1922" xml:space="preserve"/>
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3973 </p>
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3974 </div>
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3975 <div xml:id="echoid-div194" type="section" level="1" n="187">
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3976 <head xml:id="echoid-head207" xml:space="preserve">157. Verſuch.</head>
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3977 <p>
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3978 <s xml:id="echoid-s1923" xml:space="preserve">Herr Achard ſtellte eine kreisrunde Glasplatte, <lb/>welche ohngefähr {2/10} Zoll dick war, und einen Schuh im <lb/>Durchmeſſer hatte, horizontal auf eine zinnerne Platte, <lb/>welche das Glas nur in wenig Punkten berührte. </s>
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3979 <s xml:id="echoid-s1924" xml:space="preserve">Als er <lb/>die Oberfläche des Glaſes gerieben hatte, that dieſe Vor-<lb/>richtung alle Wirkungen des Elektrophors, woraus er <lb/>ſchließt, es ſey nicht nöthig, daß die untere Metallplatte <lb/>den elektriſchen Ueberzug mit ihrer ganzen Fläche genau <lb/>berühre.</s>
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3980 <s xml:id="echoid-s1925" xml:space="preserve"/>
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3981 </p>
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3982 <pb o="128" file="0148" n="148" rhead="Eilftes Capitel."/>
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3983 </div>
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3984 <div xml:id="echoid-div195" type="section" level="1" n="188">
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3985 <head xml:id="echoid-head208" xml:space="preserve">158. Verſuch.</head>
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3986 <p>
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3987 <s xml:id="echoid-s1926" xml:space="preserve">Er iſolirte in horizontaler Stellung eine Glasplatte <lb/>von einem Schuh Durchmeſſer, rieb ſie, ſetzte die obere <lb/>Platte auf die gewöhnliche Art auf, und erhielt eine Reihe <lb/>ſchwacher Funken, einen nach dem andern; </s>
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3988 <s xml:id="echoid-s1927" xml:space="preserve">doch mußte <lb/>er, wenn Funken entſtehen ſollten, den Finger eine Zeit-<lb/>lang auf der obern Platte liegen laſſen. </s>
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3989 <s xml:id="echoid-s1928" xml:space="preserve">Wenn er die <lb/>Glasplatte nicht mit Glas, ſondern mit Siegellak oder Pech <lb/>iſolirte, ſo fand er die Funken allezeit ſtärker. </s>
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3990 <s xml:id="echoid-s1929" xml:space="preserve">Aus die-<lb/>ſem Verſuche ſchließt er, daß zu der Hervorbringung der <lb/>Wirkungen dieſes Inſtruments die untere Platte nicht nö-<lb/>thig ſey, und daß es, wenn auch dieſe fehlet, dennoch <lb/>alle ſeine Eigenſchaften behalte.</s>
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3991 <s xml:id="echoid-s1930" xml:space="preserve"/>
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3992 </p>
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3993 </div>
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3994 <div xml:id="echoid-div196" type="section" level="1" n="189">
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3995 <head xml:id="echoid-head209" xml:space="preserve">159. Verſuch.</head>
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3996 <p>
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3997 <s xml:id="echoid-s1931" xml:space="preserve">Er rieb die Oberfläche eines Harzelektrophors, ſtellte <lb/>die Metallplatte darauf, und hob ſie eine kleine Zeit her-<lb/>nach mit dem iſolirenden Handgrif auf, ohne ſie vorher <lb/>mit dem Finger zu berühren. </s>
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3998 <s xml:id="echoid-s1932" xml:space="preserve">Sie gab in dieſem Zuſtan-<lb/>de keinen Funken, zeigte auch nicht das geringſte Anzie-<lb/>hen oder Zurückſtoßen; </s>
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3999 <s xml:id="echoid-s1933" xml:space="preserve">woraus erhellet, daß der Elektro-<lb/>phor die Metallplatte nicht elektriſiren könne, wenn ſie nicht <lb/>von einem Körper berührt wird, der ihr Elektricität geben, <lb/>oder dieſe von ihr annehmen kan.</s>
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4000 <s xml:id="echoid-s1934" xml:space="preserve"/>
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4001 </p>
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4002 </div>
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4003 <div xml:id="echoid-div197" type="section" level="1" n="190">
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4004 <head xml:id="echoid-head210" xml:space="preserve">160. Verſuch.</head>
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4005 <p>
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4006 <s xml:id="echoid-s1935" xml:space="preserve">Man ſtelle die Metallplatte auf einen geriebenen <lb/>Elektrophor, und bringe den Finger daran, ſo wird ſich <lb/>zwiſchen beyden ein Funken zeigen. </s>
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4007 <s xml:id="echoid-s1936" xml:space="preserve">Da nun die elektriſche <lb/>Materie niemals als ein Funken erſcheint, auſſer wenn ſie <lb/>plötzlich und mit Gewalt aus einem Körper in den andern <lb/>übergeht, und da die Metallplatte keine elektriſchen Er-<lb/>ſcheinungen zeigt, wenn ſie nicht vorher von einem Leiter <lb/>iſt berührt worden, ſo können wir hieraus ſchließen, daß <lb/>der Elektrophor die obere Platte nur alsdann elektriſire,
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4008 <pb o="129" file="0149" n="149" rhead="Vom Elektrophor."/>
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4009 wenn dieſelbe einen Theil ihrer Elektricität abgegeben oder <lb/>neue angenommen hat.</s>
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4010 <s xml:id="echoid-s1937" xml:space="preserve"/>
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4011 </p>
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4012 </div>
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4013 <div xml:id="echoid-div198" type="section" level="1" n="191">
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4014 <head xml:id="echoid-head211" xml:space="preserve">161. Verſuch.</head>
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4015 <p>
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4016 <s xml:id="echoid-s1938" xml:space="preserve">Man befeſtige ein meſſingenes Stäbchen mit herab-<lb/>hängenden Korkkugeln an die Metallplatte, und ſtelle bey-<lb/>des zuſammen auf den Elektrophor, ſo werden die Ku-<lb/>geln ſogleich ein wenig auseinander gehen; </s>
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4017 <s xml:id="echoid-s1939" xml:space="preserve">man berühre <lb/>die obere Platte mit dem Finger, ſo werden ſie wieder zu-<lb/>ſammenfallen; </s>
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4018 <s xml:id="echoid-s1940" xml:space="preserve">wenn man aber dieſe Platte mit ihrem glä-<lb/>ſernen Handgrif von dem Elektrophor aufhebt, ſo gehen <lb/>die Kugeln ſehr ſtark, und unter einem großen Winkel, <lb/>auseinander; </s>
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4019 <s xml:id="echoid-s1941" xml:space="preserve">zieht man aber einen Funken heraus, ſo fal-<lb/>len ſie ſogleich zuſammen. </s>
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4020 <s xml:id="echoid-s1942" xml:space="preserve">Das Auseinandergehen der <lb/>Kugeln zeigt deutlich, daß die obere Platte der untern <lb/>Elektricität entziehet, oder etwas von ihrem natürlichen <lb/>Vorrathe mittheilet; </s>
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4021 <s xml:id="echoid-s1943" xml:space="preserve">es zeigt auch, daß die erſtere, ſobald <lb/>ſie auf den Elektrophor gelegt wird, einen geringen Grad <lb/>von Elektricität erhält, den ſie wieder verliert, wenn ſie <lb/>mit dem Finger berührt wird; </s>
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4022 <s xml:id="echoid-s1944" xml:space="preserve">ſie wird aber aufs neue <lb/>elektriſirt, wenn man ſie von dem Elektrophor trennt.</s>
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4023 <s xml:id="echoid-s1945" xml:space="preserve"/>
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4024 </p>
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4025 </div>
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4026 <div xml:id="echoid-div199" type="section" level="1" n="192">
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4027 <head xml:id="echoid-head212" xml:space="preserve">162. Verſuch.</head>
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4028 <p>
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4029 <s xml:id="echoid-s1946" xml:space="preserve">Man iſolire einen Elektrophor, und hänge eine Kork-<lb/>kugel an einem leinenen Faden ſo auf, daß ſie ohngefähr <lb/>{1/4} Zoll von einem mit der untern Platte verbundenen Stück <lb/>Metall abſteht. </s>
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4030 <s xml:id="echoid-s1947" xml:space="preserve">Die Kugel bewegt ſich nicht, wenn die <lb/>obere Platte auf den Elektrophor gelegt wird; </s>
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4031 <s xml:id="echoid-s1948" xml:space="preserve">wenn man <lb/>aber dieſelbe mit dem Finger berührt, ſo wird die Kugel <lb/>angezogen. </s>
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4032 <s xml:id="echoid-s1949" xml:space="preserve">Sobald die obere Platte weggenommen wird, <lb/>ſo zieht die untere metalliſche Belegung die Kugel an, läßt <lb/>ſie aber wieder gehen, wenn man die Belegung mit dem <lb/>Finger berührt. </s>
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4033 <s xml:id="echoid-s1950" xml:space="preserve">Auch wird die Kugel angezogen, wenn <lb/>man die obere Platte aufſetzt, ehe der Funken aus derſel-<lb/>ben gezogen iſt, obgleich das Anziehen länger dauert und
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4034 <pb o="130" file="0150" n="150" rhead="Eilftes Capitel."/>
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diff changeset
4035 ſtärker iſt, wenn man den Funken herauszieht, ehe man <lb/>die Platte auf den Elektrophor ſetzt.</s>
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4036 <s xml:id="echoid-s1951" xml:space="preserve"/>
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4037 </p>
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4038 </div>
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4039 <div xml:id="echoid-div200" type="section" level="1" n="193">
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4040 <head xml:id="echoid-head213" xml:space="preserve">163. Verſuch.</head>
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4041 <p>
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4042 <s xml:id="echoid-s1952" xml:space="preserve">Man elektriſire die untere Seite des Elektrophors, <lb/>indem man die untere Platte mit dem Conductor einer <lb/>Maſchine verbindet; </s>
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4043 <s xml:id="echoid-s1953" xml:space="preserve">ſo wird die obere Platte der Hand, <lb/>oder einem andern Leiter, ſtarke Funken geben. </s>
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4044 <s xml:id="echoid-s1954" xml:space="preserve">Berührt <lb/>man die obere Platte mit einer, und die untere mit der <lb/>andern Hand, ſo erhält man einen Schlag. </s>
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diff changeset
4045 <s xml:id="echoid-s1955" xml:space="preserve">Eben dieſe <lb/>Wirkung erfolgt, wenn die obere Platte durch die Ma-<lb/>ſchine elektriſiret wird.</s>
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4046 <s xml:id="echoid-s1956" xml:space="preserve"/>
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4047 </p>
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4048 </div>
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4049 <div xml:id="echoid-div201" type="section" level="1" n="194">
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4050 <head xml:id="echoid-head214" xml:space="preserve">164. Verſuch.</head>
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4051 <p>
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4052 <s xml:id="echoid-s1957" xml:space="preserve">Man iſolire einen nicht geriebenen Elektrophor, ſtelle <lb/>die obere Platte darauf, und elektriſire die untere durch <lb/>eine mit dem erſten Leiter verbundene Kette. </s>
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4053 <s xml:id="echoid-s1958" xml:space="preserve">Man ziehe <lb/>hierauf einen Funken aus der Kette, ſo wird der Elektro-<lb/>phor alle die Eigenſchaften erhalten, welche er ſonſt durch <lb/>das Reiben ſeiner Oberfläche bekömmt.</s>
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4054 <s xml:id="echoid-s1959" xml:space="preserve"/>
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4055 </p>
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4056 </div>
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4057 <div xml:id="echoid-div202" type="section" level="1" n="195">
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4058 <head xml:id="echoid-head215" xml:space="preserve">165. Verſuch.</head>
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4059 <p>
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4060 <s xml:id="echoid-s1960" xml:space="preserve">Man verbinde die obere Platte durch eine Kette mit <lb/>dem erſten Leiter, elektriſire ſie, und ziehe hierauf einen <lb/>Funken aus der Kette, ſo wird auch in dieſem Falle der <lb/>Elektrophor alle Eigenſchaften annehmen, welche er ſonſt <lb/>durch Reiben erhält.</s>
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diff changeset
4061 <s xml:id="echoid-s1961" xml:space="preserve"/>
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4062 </p>
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4063 </div>
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4064 <div xml:id="echoid-div203" type="section" level="1" n="196">
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4065 <head xml:id="echoid-head216" xml:space="preserve">166. Verſuch.</head>
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4066 <p>
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4067 <s xml:id="echoid-s1962" xml:space="preserve">Eben dieſe Wirkung erfolgt, wenn man eine leidner <lb/>Flaſche auf die obere Platte eines nicht geriebenen Elektro-<lb/>phors ſetzt, und dieſelbe auf der Platte ladet und entladet.</s>
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4068 <s xml:id="echoid-s1963" xml:space="preserve"/>
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4069 </p>
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4070 <p>
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4071 <s xml:id="echoid-s1964" xml:space="preserve">Aus den drey letztern Verſuchen ſieht man, daß der <lb/>Elektrophor eben ſowohl durch Mittheilung, als durch <lb/>Reiben, in Wirkſamkeit geſetzt werden könne.</s>
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4072 <s xml:id="echoid-s1965" xml:space="preserve"/>
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diff changeset
4073 </p>
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4074 <pb o="131" file="0151" n="151" rhead="Vom Elektrophor."/>
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4075 </div>
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4076 <div xml:id="echoid-div204" type="section" level="1" n="197">
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4077 <head xml:id="echoid-head217" xml:space="preserve">167. Verſuch.</head>
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4078 <p>
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4079 <s xml:id="echoid-s1966" xml:space="preserve">Herr Achard ſtellte die obere Platte auf einen gerie-<lb/>benen Elektrophor, und auf dieſe Platte einen metallenen <lb/>Würfel mit einem gläſernen Handgriffe; </s>
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4080 <s xml:id="echoid-s1967" xml:space="preserve">wenn er dieſen <lb/>Würfel mit dem Handgriffe abnahm, ohne ihn vorher zu <lb/>berühren, ſo zog er eine leichte Kugel an. </s>
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4081 <s xml:id="echoid-s1968" xml:space="preserve">Wiederhohlte <lb/>er den Verſuch, berührte aber die Platte vorher, ehe er <lb/>den Würfel abnahm, ſo fand er nicht das geringſte Zei-<lb/>chen von Elektricität.</s>
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diff changeset
4082 <s xml:id="echoid-s1969" xml:space="preserve"/>
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4083 </p>
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diff changeset
4084 </div>
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4085 <div xml:id="echoid-div205" type="section" level="1" n="198">
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4086 <head xml:id="echoid-head218" xml:space="preserve">168. Verſuch.</head>
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4087 <p>
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4088 <s xml:id="echoid-s1970" xml:space="preserve">Wenn man den Elektrophor mit einem Elektrometer <lb/>von Korkkugeln unterſucht, ſo findet man folgendes:</s>
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diff changeset
4089 <s xml:id="echoid-s1971" xml:space="preserve"/>
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4090 </p>
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4091 <p>
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4092 <s xml:id="echoid-s1972" xml:space="preserve">1) Sobald die obere Platte auf einen Harzelektro-<lb/>phor geſetzt wird, ſo erhält ſie eine ſchwache poſitive Elek-<lb/>tricität; </s>
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4093 <s xml:id="echoid-s1973" xml:space="preserve">ſetzt man ſie aber auf einen Glaselektrophor, ſo <lb/>wird ſie negativ elektriſiret.</s>
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4094 <s xml:id="echoid-s1974" xml:space="preserve"/>
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diff changeset
4095 </p>
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diff changeset
4096 <p>
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4097 <s xml:id="echoid-s1975" xml:space="preserve">2) Berührt man die obere Platte mit dem Finger, <lb/>ſo verliert ſie alle ihre Elektricität.</s>
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4098 <s xml:id="echoid-s1976" xml:space="preserve"/>
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4099 </p>
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4100 <p>
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4101 <s xml:id="echoid-s1977" xml:space="preserve">3) Wird die obere Platte mit dem Finger berührt, <lb/>und von dem Elektrophor weggenommen, ſo erhält ſie eine <lb/>ſtarke negative Elektricität, wenn der Elektrophor von <lb/>Glas, hingegen eine poſitive, wenn er von Harz iſt.</s>
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4102 <s xml:id="echoid-s1978" xml:space="preserve"/>
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4103 </p>
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4104 <p>
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4105 <s xml:id="echoid-s1979" xml:space="preserve">Man kann ſich den Elektrophor in mehrere horizon-<lb/>tale Schichten getheilt, vorſtellen, ſo daß beym Elektriſi-<lb/>ren durch Mittheilen oder Reiben die obere Schicht ver-<lb/>mittelſt der untern iſolirt wird. </s>
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4106 <s xml:id="echoid-s1980" xml:space="preserve">Nun behalten alle iſolirte <lb/>elektriſche Körper ihre Elektricität eine beträchtliche Zeit-<lb/>lang, und dies iſt die Urſache, warum die Elektricität <lb/>des Elektrophors ſich ſo lang erhält.</s>
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4107 <s xml:id="echoid-s1981" xml:space="preserve"/>
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4108 </p>
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4109 <p>
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4110 <s xml:id="echoid-s1982" xml:space="preserve">Iſolirtes und geriebenes Glas giebt Körpern, welche <lb/>in ſeinen Wirkungskreis gebracht werden, die negative <lb/>Elektricität; </s>
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4111 <s xml:id="echoid-s1983" xml:space="preserve">da hingegen negative elektriſche Körper im <lb/>ähnlichen Falle poſitive Elektricität hervorbringen. </s>
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4112 <s xml:id="echoid-s1984" xml:space="preserve">Da-<lb/>her muß die Oberfläche des Elektrophors, wenn er von
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4113 <pb o="132" file="0152" n="152" rhead="Eilftes Capitel."/>
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4114 Harz iſt, die poſitive, wenn er hingegen von Glas iſt, die <lb/>negati@e Elektricität hervorbringen, welches mit den Ver-<lb/>ſuchen vollkommen übereinſtimmt. </s>
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4115 <s xml:id="echoid-s1985" xml:space="preserve">Wird nun die obere <lb/>Platte mit dem Finger berührt, ſo hört die Oberfläche des <lb/>Elektrophors auf, iſolirt zu ſeyn, und giebt der obern <lb/>Platte die negative Elektricität, wenn ſie von Glas, und <lb/>die poſitive, wenn ſie von Harz iſt, wie dies mit den ver-<lb/>ſchidenen im vierten Capitel beſchriebenen Verſuchen <lb/>übereinſtimmt.</s>
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4116 <s xml:id="echoid-s1986" xml:space="preserve"/>
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4117 </p>
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4118 <p>
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4119 <s xml:id="echoid-s1987" xml:space="preserve">So lange elektriſche Körper mit leitenden Subſtan-<lb/>zen in Berührung ſtehen, ſetzen ſie niemals die elektriſche <lb/>Materie in denjenigen Grad von Bewegung, welcher <lb/>nöthig iſt, um einen Funken zu erzeugen, oder die Phä-<lb/>nomene des Anziehens und Zurückſtoßens hervorzubrin-<lb/>gen. </s>
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4120 <s xml:id="echoid-s1988" xml:space="preserve">Dies iſt die Urſache, warum die obere Platte kein <lb/>Zeichen einer Elektricität von ſich giebt, ſo lange ſie mit <lb/>der untern in Berührung iſt, obgleich dieſe Zeichen au-<lb/>genblicklich ſichtbar werden, ſobald man die obere Platte <lb/>abhebt.</s>
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4121 <s xml:id="echoid-s1989" xml:space="preserve"/>
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4122 </p>
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4123 <p>
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4124 <s xml:id="echoid-s1990" xml:space="preserve">Da man die Theorie des Elektrophors für ſehr ver-<lb/>wickelt hält, ſo will ich noch eine andere Erklärung derſel-<lb/>ben aus dem Monthly Review mittheilen.</s>
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4125 <s xml:id="echoid-s1991" xml:space="preserve"/>
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4126 </p>
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4127 <quote><s xml:id="echoid-s1992" xml:space="preserve">Daher wirkt (bey einem Glaselektrophor, weil die-
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4128 ſer Fall eine deutlichere Erläuterung zuläßt) die geriebe-
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4129 ne Platte ſo auf die in der obern meſſingenen Platte von
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4130 Natur enthaltene elektriſche Materie, daß ſie einen Theil
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4131 des natürlichen Vorraths derſelben in Form eines Fun-
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4132 kens an der Stelle, wo der Finger angehalten wird, aus-
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4133 treibt. Hebt man in dieſem Zuſtande die meſſingene
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4134 Platte an ihrem Handgriffe auf, ſo nimmt ſie dieſen
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4135 Funken aus dem Finger wieder an ſich. Wird ſie wie-
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4136 der aufgeſetzt, und das Verfahren wiederholt, ſo erhält
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4137 man daſſelbe Reſultat von neuem wieder, und kann da-
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4138 mit eine ſehr lange Zeit fortfahren, ohne die Kraſt des
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4139 geriebenen elektriſchen Körpers zu vermindern, indem der-
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4140 ſelbe in der That nichts von ſeiner eignen Elektricität
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4141 <pb o="133" file="0153" n="153" rhead="Vom Elektrophor."/>
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4142 mittheilt, ſondern nur einen Theil derjenigen elektriſchen
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4143 Materie, welche ſich in der obern Platte befindet, zu-
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4144 rückſtößt, welcher Verluſt dieſer Platte von Zeit zu Zeit
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4145 durch die mit der Erde verbundene Perſon, die ſie mit
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4146 dem Finger berührt, wiedererſetzt wird.</s></quote>
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4147 </div>
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4148 <div xml:id="echoid-div206" type="section" level="1" n="199">
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4149 <head xml:id="echoid-head219" xml:space="preserve">169. Verſuch.</head>
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4150 <p>
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4151 <s xml:id="echoid-s1993" xml:space="preserve">Man ſtelle ein Stück Metall auf einen geriebenen <lb/>Elektrophor. </s>
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4152 <s xml:id="echoid-s1994" xml:space="preserve">Die Geſtalt deſſelben iſt gleichgültig. </s>
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4153 <s xml:id="echoid-s1995" xml:space="preserve">Man <lb/>elektriſire dieſes Stück Metall mit derjenigen Kraft, wel-<lb/>che der Elektricität des Elektrophors entgegen geſetzt iſt, <lb/>nehme es alsdann mit Hülfe eines elektriſchen Körpers hin-<lb/>weg, und ſtreue feingeſtoßenen Harzſtaub auf den Elek-<lb/>trophor, ſo werden ſich auf der Oberfläche deſſelben ſonder-<lb/>bare ſtrahligte Figuren bilden. </s>
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4154 <s xml:id="echoid-s1996" xml:space="preserve">Iſt die Platte negativ <lb/>und das Metall poſitiv, ſo legt ſich der Staub hauptſäch-<lb/>lich auf diejenigen Stellen, wo das Metall geſtanden hat; <lb/></s>
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4155 <s xml:id="echoid-s1997" xml:space="preserve">iſt hingegen die Platte poſitiv und das Metall negativ, ſo <lb/>bleiben die vom Metall berührten Stellen vom Staube <lb/>frey, und es fällt derſelbe mehr auf die übrigen.</s>
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4156 <s xml:id="echoid-s1998" xml:space="preserve"/>
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4157 </p>
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4158 </div>
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4159 <div xml:id="echoid-div207" type="section" level="1" n="200">
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4160 <head xml:id="echoid-head220" xml:space="preserve">170. Verſuch.</head>
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4161 <p>
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4162 <s xml:id="echoid-s1999" xml:space="preserve">Man iſolire ein blechernes Quartmaaß, hänge ein <lb/>Paar Korkkugeln an ſeidnen Fäden ſo auf, daß das ganze <lb/>Elektrometer innerhalb des Maaßes ſtehe, und elektriſire <lb/>das Maaß, ſo wird das Elektrometer nicht die geringſte <lb/>Elektricität zeigen. </s>
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4163 <s xml:id="echoid-s2000" xml:space="preserve">Die gleichartigen Atmoſphären wir-<lb/>ken gegen einander, und da keine entgegengeſetzte Elektri-<lb/>cität im Elektrometer Statt finden kann, ſo bleibt es un-<lb/>elektriſirt. </s>
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4164 <s xml:id="echoid-s2001" xml:space="preserve">Berührt man aber das Maaß mit einem Lei-<lb/>ter, ſo zieht es die Kugeln augenblicklich an.</s>
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4165 <s xml:id="echoid-s2002" xml:space="preserve"/>
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4166 </p>
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4167 </div>
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4168 <div xml:id="echoid-div208" type="section" level="1" n="201">
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4169 <head xml:id="echoid-head221" xml:space="preserve">171. Verſuch.</head>
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4170 <p>
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4171 <s xml:id="echoid-s2003" xml:space="preserve">Man hänge einen kleinen Cylinder von Goldpapier <lb/>an Stanniol auf, und berühre damit das elektriſirte und
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4172 <pb o="134" file="0154" n="154" rhead="Eilftes Capitel."/>
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4173 iſolirte Maaß, ſo entſteht ein Funken zwiſchen beyden, und <lb/>die Elektricität vertheilt ſich unter beyde nach dem Ver-<lb/>hältniß ihrer Capacitäten. </s>
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4174 <s xml:id="echoid-s2004" xml:space="preserve">Nun ſenke man den iſolirten <lb/>Cylinder auf den Boden des Maaßes herab, ſo giebt er <lb/>demſelben die Elektricität, die er von ihm bekommen hatte, <lb/>wieder, und man bemerkt an ihm, wenn er herausge-<lb/>nommen wird, nicht das geringſte Merkmal einer Elek-<lb/>kricität.</s>
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4175 <s xml:id="echoid-s2005" xml:space="preserve"/>
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4176 </p>
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4177 </div>
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4178 <div xml:id="echoid-div209" type="section" level="1" n="202">
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4179 <head xml:id="echoid-head222" xml:space="preserve">172. Verſuch.</head>
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4180 <p>
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4181 <s xml:id="echoid-s2006" xml:space="preserve">Man verbinde ein Paar Korkkugeln mit einem iſo-<lb/>lirten metallenen Gefäß, in welchem eine metallene Kette <lb/>liegt, und hebe die Kette mit einem ſeidnen Faden in die <lb/>Höhe, ſo wird das Auseinandergehen der Kugeln immer <lb/>ſchwächer werden, je mehr man die Kette erhebt, und aus-<lb/>einanderziehet. </s>
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4182 <s xml:id="echoid-s2007" xml:space="preserve">Man ſieht hieraus, daß die Elektricität <lb/>geſchwächt, und ihre Dichtigkeit vermindert wird, je mehr <lb/>ſie ſich von der Oberfläche des Gefäßes gegen die ausge-<lb/>breitete Kette verbreitet. </s>
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4183 <s xml:id="echoid-s2008" xml:space="preserve">Dies beſtätigt ſich auch dadurch, <lb/>daß die Kugeln wieder auseinanderfahren, wenn man die <lb/>Kette im Gefäße niederleget. </s>
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4184 <s xml:id="echoid-s2009" xml:space="preserve">Dieſer Verſuch giebt eine <lb/>leichte Erklärung von vielen Phänomenen der atmoſphä-<lb/>riſchen Elektricität, z. </s>
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4185 <s xml:id="echoid-s2010" xml:space="preserve">B. </s>
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4186 <s xml:id="echoid-s2011" xml:space="preserve">warum die Dämpfe des elektri-<lb/>ſirten Waſſers ſo wenig Elektricität zeigen, und warum <lb/>die Elektricität einer Wolke durch die Zuſammendrückung <lb/>oder Verdichtung derſelben ſtärker wird.</s>
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4187 <s xml:id="echoid-s2012" xml:space="preserve"/>
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4188 </p>
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4189 </div>
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4190 <div xml:id="echoid-div210" type="section" level="1" n="203">
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4191 <head xml:id="echoid-head223" xml:space="preserve">173. Verſuch.</head>
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4192 <p>
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4193 <s xml:id="echoid-s2013" xml:space="preserve">Man reibe einen Streif weißen Flanell oder ein ſeid-<lb/>nes Band, ziehe ſo viel Funken aus demſelben, als man <lb/>erhalten kann und lege oder rolle es alsdann zuſammen, <lb/>ſo wird es unter dieſer Geſtalt noch ſtark elektriſch ſeyn, <lb/>Funken geben, und Lichtbüſchel ausſtrömen.</s>
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4194 <s xml:id="echoid-s2014" xml:space="preserve"/>
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4195 </p>
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4196 <pb o="135" file="0155" n="155" rhead="Vom Elektrophor."/>
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4197 </div>
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4198 <div xml:id="echoid-div211" type="section" level="1" n="204">
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4199 <head xml:id="echoid-head224" xml:space="preserve">Von den Vortheilen des unvollkommenen Iſolirens <lb/>und wie man ſehr geringe Grade der natürlichen <lb/>und künſtlichen Elektricität merklich machen <lb/>könne, von Herrn Volta.</head>
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4200 <p>
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4201 <s xml:id="echoid-s2015" xml:space="preserve">Ein zur Beobachtung der atmoſphäriſchen Elektricität <lb/>eingerichteter Conductor wird bey heiterm Himmel ſehr <lb/>ſelten auf das Elektrometer, wenn es auch noch ſo em-<lb/>pfindlich wäre, wirken. </s>
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4202 <s xml:id="echoid-s2016" xml:space="preserve">Vermittelſt des nunmehr zu be-<lb/>ſchreibenden Apparatus aber kann man zeigen, daß ein <lb/>ſolcher Conductor faſt allezeit elektriſch, und alſo die Luft, <lb/>die ihn umgiebt, zu jeder Zeit elektriſirt ſey. </s>
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4203 <s xml:id="echoid-s2017" xml:space="preserve">Dieſe Me-<lb/>thode zeigt auch nicht allein das Daſeyn, ſondern auch die <lb/>Beſchaffenheit der Elektricität, ob ſie poſitiv oder negativ <lb/>ſey, und dies ſelbſt in allen Fällen, in welchen der Con-<lb/>ductor nicht einmal den feinſten Faden anzieht; </s>
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4204 <s xml:id="echoid-s2018" xml:space="preserve">iſt das <lb/>Anziehen an dem Conductor nur einigermaſſen merklich, <lb/>ſo giebt dieſer Apparatus ſchon ſehr lange Funken.</s>
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4205 <s xml:id="echoid-s2019" xml:space="preserve"/>
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4206 </p>
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4207 <p>
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4208 <s xml:id="echoid-s2020" xml:space="preserve">Man kann dem Elektrophor, der hierzu gebraucht <lb/>wird, ſehr ſchicklich den Namen eines Mikro@ elektro-<lb/>meters, oder eines Condenſators der Elektricität, <lb/>geben.</s>
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4209 <s xml:id="echoid-s2021" xml:space="preserve"/>
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4210 </p>
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4211 <p>
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4212 <s xml:id="echoid-s2022" xml:space="preserve">Wenn der atmoſphäriſche Conduktor ſchon an ſich <lb/>hinlängliche Merkmale der Elektricität giebt, ſo wird <lb/>dieſer condenſirende Apparatus unbrauchbar. </s>
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4213 <s xml:id="echoid-s2023" xml:space="preserve">Denn wenn <lb/>die Elektricität ſtark iſt, ſo fügt ſichs oft, daß ein Theil <lb/>der Elektricität der Metallplatte der andern Platte mitge-<lb/>theilt wird, in welchem Falle der Apparatus als ein Elek-<lb/>trophor wirkt, und zu der hier vorkommenden Abſicht un-<lb/>geſchickt wird.</s>
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4214 <s xml:id="echoid-s2024" xml:space="preserve"/>
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4215 </p>
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4216 <p>
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4217 <s xml:id="echoid-s2025" xml:space="preserve">Der zu dieſer Abſicht dienende Apparatus beſteht aus <lb/>der obern Metallplatte eines Elektrophors und einer halb-<lb/>elektriſchen oder ſehr unvollkommenen leitenden Platte, <lb/>welche den Durchgang der Elektricität nur in einem ge-<lb/>wiſſen Grade hindert. </s>
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4218 <s xml:id="echoid-s2026" xml:space="preserve">Man findet vielerley ſolche Leiter <lb/>z. </s>
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4219 <s xml:id="echoid-s2027" xml:space="preserve">B. </s>
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4220 <s xml:id="echoid-s2028" xml:space="preserve">eine reine trockne Marmorplatte, eine hölzerne mit
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4221 <pb o="136" file="0156" n="156" rhead="Eilftes Capitel."/>
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4222 Firnis überzogene Tafel u. </s>
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4223 <s xml:id="echoid-s2029" xml:space="preserve">dgl. </s>
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4224 <s xml:id="echoid-s2030" xml:space="preserve">Da die Oberfläche ſolcher <lb/>Körper keine Elektricität annimmt, oder wenn ſich auch <lb/>einige daran hinge, ſie wegen ihrer halbleitenden Natur <lb/>bald wieder verliert, ſo können ſie nicht zu Elektrophoren, <lb/>wohl aber zu Condenſatoren der Elektricität gebraucht <lb/>werden.</s>
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4225 <s xml:id="echoid-s2031" xml:space="preserve"/>
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4226 </p>
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4227 <p>
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4228 <s xml:id="echoid-s2032" xml:space="preserve">Inzwiſchen muß man ſich bey der Auswahl ſolcher <lb/>Platten wohl hüten, daß man nicht allzufreye Leiter oder <lb/>ſolche Körper wähle, die durch den Gebrauch gute Leiter <lb/>werden, weil es ſchlechterdings nothwendig iſt, daß die <lb/>Elektricität beym Uebergange über ihre Oberfläche be-<lb/>trächtlichen Widerſtand finde. </s>
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4229 <s xml:id="echoid-s2033" xml:space="preserve">Wenn man eine ſolche <lb/>Platte durch Trocknen, oder auf andere Art, zubereitet, <lb/>ſo iſt es weit beſſer, ſie der Natur der elektriſchen Körper <lb/>näher zu bringen, als ihr zu viel von den Eigenſchaften <lb/>der Leiter zu laſſen. </s>
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4230 <s xml:id="echoid-s2034" xml:space="preserve">Eine wohlgetrocknete Marmorplatte <lb/>oder hölzerne Tafel thut ſehr gute Dienſte und iſt allen <lb/>andern Platten vorzuziehen; </s>
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4231 <s xml:id="echoid-s2035" xml:space="preserve">ſonſt iſt aber auch die Platte <lb/>eines Elektrophors ſelbſt beſſer, als alle unzubereitete <lb/>Körper.</s>
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4232 <s xml:id="echoid-s2036" xml:space="preserve"/>
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4233 </p>
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4234 <p>
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4235 <s xml:id="echoid-s2037" xml:space="preserve">Auch die ſchlechteſte Sorte von Marmor, wenn ſie <lb/>mit Copal- Bernſtein- oder Lackfirniß überzogen, und auf <lb/>kurze Zeit auf einem Ofen erwärmt wird, thut die beſten <lb/>Dienſte, auch ohne bey jedem Verſuche beſonders erwärmt <lb/>zu werden. </s>
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4236 <s xml:id="echoid-s2038" xml:space="preserve">Dies, könnte man ſagen, hieße ſie zur Na-<lb/>tur eines Elektrophors zurückbringen: </s>
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4237 <s xml:id="echoid-s2039" xml:space="preserve">denn Marmor, <lb/>Holz u. </s>
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4238 <s xml:id="echoid-s2040" xml:space="preserve">dgl. </s>
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4239 <s xml:id="echoid-s2041" xml:space="preserve">wenn es überfirnißt und erwärmt wird, läßt <lb/>ſich durch ein ſehr gelindes Reiben, und oft ſogar durch <lb/>das bloße Aufſetzen einer Metallplatte elektriſch machen; <lb/></s>
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4240 <s xml:id="echoid-s2042" xml:space="preserve">allein eben um dieſes zu verhüten, darf man dieſe Platten <lb/>beym Gebrauch nicht erwärmen.</s>
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4241 <s xml:id="echoid-s2043" xml:space="preserve"/>
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4242 </p>
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4243 <p>
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4244 <s xml:id="echoid-s2044" xml:space="preserve">Die Vortheile, welche Platten von dieſer Art vor <lb/>dem gewöhnlichen Elektrophor voraus haben, ſind folgen-<lb/>de: </s>
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4245 <s xml:id="echoid-s2045" xml:space="preserve">1) Daß der Firniß allezeit dünner iſt, als die ge-<lb/>wöhnliche Harzſchicht eines Elektrophors. </s>
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4246 <s xml:id="echoid-s2046" xml:space="preserve">2) Daß er
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4247 <pb o="137" file="0157" n="157" rhead="Vom Elektrophor."/>
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4248 eine glättere und ebnere Oberfläche annimmt: </s>
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4249 <s xml:id="echoid-s2047" xml:space="preserve">daher die <lb/>Metallplatte beſſer anpaſſet.</s>
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4250 <s xml:id="echoid-s2048" xml:space="preserve"/>
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4251 </p>
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4252 <p>
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4253 <s xml:id="echoid-s2049" xml:space="preserve">Mit eben ſo vielem Vortheile kann man jede Sorte <lb/>von Platten, mit Wachstuch, Wachstaffet, Sattin, oder <lb/>einem andern nicht allzuſtarken ſeidnen Stoff überzogen, <lb/>gebrauchen, wenn ſie vorher ein wenig erwärmt wird. <lb/></s>
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4254 <s xml:id="echoid-s2050" xml:space="preserve">Seidne Zeuge ſind zu dieſer Abſicht beſſer, als baumwol-<lb/>lene oder wollene, und beyde beſſer als leinene. </s>
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4255 <s xml:id="echoid-s2051" xml:space="preserve">Papier, <lb/>Leder, Holz, Elfenbein, Knochen, und alle Arten von <lb/>unvollkommnen Leitern kan man in gewiſſem Grade dazu <lb/>geſchickt machen, wenn man ſie vorher trocknet, und wäh-<lb/>rend des Verſuchs warm erhält.</s>
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diff changeset
4256 <s xml:id="echoid-s2052" xml:space="preserve"/>
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diff changeset
4257 </p>
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diff changeset
4258 <p>
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4259 <s xml:id="echoid-s2053" xml:space="preserve">Noch einfacher wird der Apparatus, wenn man die <lb/>Seide a. </s>
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4260 <s xml:id="echoid-s2054" xml:space="preserve">an die obere Metallplatte mit dem gläſernen <lb/>Handgriffe anbringt, wobey die Marmorplatte oder die <lb/>untere unnöthig wird, indem man an ihrer Statt jede <lb/>Fläche gebrauchen kann, z. </s>
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4261 <s xml:id="echoid-s2055" xml:space="preserve">B. </s>
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4262 <s xml:id="echoid-s2056" xml:space="preserve">eine gemeine hölzerne oder <lb/>Marmortafel, wenn ſie auch nicht ganz trocken iſt, eine <lb/>Metallplatte, ein Buch, oder jeden Leiter, der eine ebne <lb/>Oberfläche hat.</s>
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diff changeset
4263 <s xml:id="echoid-s2057" xml:space="preserve"/>
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4264 </p>
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4265 <p>
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4266 <s xml:id="echoid-s2058" xml:space="preserve">Es wird überhaupt zu dieſen Verſuchen nichts weiter <lb/>erfordert, als daß die Elektricität, welche aus der einen <lb/>Fläche in die andere übergehen will, in der einen Fläche <lb/>einigen Widerſtand finde, wie man im folgenden deutlich <lb/>ſehen wird.</s>
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4267 <s xml:id="echoid-s2059" xml:space="preserve"/>
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4268 </p>
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4269 <p>
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4270 <s xml:id="echoid-s2060" xml:space="preserve">Daher iſt es gleichgültig, ob die nicht-leitende oder <lb/>halb-leitende Schicht auf der einen oder auf der ander@ <lb/>Fläche liegt; </s>
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4271 <s xml:id="echoid-s2061" xml:space="preserve">nur dies iſt nothwendig, daß beyde auf ein-<lb/>ander paſſen; </s>
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4272 <s xml:id="echoid-s2062" xml:space="preserve">daher es ſehr bequem iſt, zwo aneinander <lb/>geſchliffene Flächen zu gebrauchen, wovon die eine über-<lb/>firnißt iſt. </s>
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4273 <s xml:id="echoid-s2063" xml:space="preserve">Zu den gewöhnlichen Verſuchen kann man <lb/>auch eine einzelne mit Seide überzogene Metallplatte mit <lb/>drey ſeidnen Schnüren, mit welchen ſie ſich aufheben läßt, <lb/>gebrauchen.</s>
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4274 <s xml:id="echoid-s2064" xml:space="preserve"/>
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4275 </p>
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4276 <p>
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4277 <s xml:id="echoid-s2065" xml:space="preserve">Um nun von dieſem Apparatus Gebrauch zu ma-<lb/>chen, ſtellt man die obere Metallplatte auf die un-
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4278 <pb o="138" file="0158" n="158" rhead="Eilftes Capitel."/>
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4279 elektriſirte Platte, und in vollkommene Berührung mit <lb/>derſelben.</s>
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4280 <s xml:id="echoid-s2066" xml:space="preserve"/>
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4281 </p>
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4282 <p>
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4283 <s xml:id="echoid-s2067" xml:space="preserve">In dieſer Stellung der Platten läßt man einen mit <lb/>dem Conductor verbundenen Drath die Metallplatte des <lb/>Elektrophors, aber dieſe nur allein, berühren. </s>
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4284 <s xml:id="echoid-s2068" xml:space="preserve">Läßt man <lb/>nun den Apparatus eine Zeitlang in dieſem Zuſtande, ſo <lb/>erhält er einen hinreichenden Grad von Elektricität, je-<lb/>doch nur ſehr langſam.</s>
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4285 <s xml:id="echoid-s2069" xml:space="preserve"/>
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4286 </p>
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4287 <p>
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4288 <s xml:id="echoid-s2070" xml:space="preserve">Man nehme nun den Drath von der Metallplatte <lb/>hinweg, und hebe ſie mit dem iſolirenden Handgriffe von <lb/>der untern ab; </s>
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4289 <s xml:id="echoid-s2071" xml:space="preserve">ſo wird ſie nunmehr Fäden anziehen, auf <lb/>das Elektrometer wirken, wenn die Elektricität ſtark iſt, <lb/>Funken geben u. </s>
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4290 <s xml:id="echoid-s2072" xml:space="preserve">ſ. </s>
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4291 <s xml:id="echoid-s2073" xml:space="preserve">w.</s>
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4292 <s xml:id="echoid-s2074" xml:space="preserve">, wenn gleich der atmoſphäriſche <lb/>Conductor nicht die geringſte Elektricität zeiget.</s>
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4293 <s xml:id="echoid-s2075" xml:space="preserve"/>
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4294 </p>
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4295 <p>
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4296 <s xml:id="echoid-s2076" xml:space="preserve">Es läßt ſich nicht leicht genau beſtimmen, wie lange <lb/>dieſe Geräthſchaft in Verbindung mit dem Conductor blei-<lb/>ben müſſe, weil dies von vielerley Umſtänden abhängt; <lb/></s>
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4297 <s xml:id="echoid-s2077" xml:space="preserve">giebt der Conductor gar kein Zeichen einer Elektricität, ſo <lb/>werden 8 bis 10 Minuten Zeit erfordert; </s>
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4298 <s xml:id="echoid-s2078" xml:space="preserve">zieht er hingegen <lb/>einen feinen Faden an, ſo ſind eben ſo viel Secunden hin-<lb/>reichend.</s>
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4299 <s xml:id="echoid-s2079" xml:space="preserve"/>
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4300 </p>
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4301 <p>
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4302 <s xml:id="echoid-s2080" xml:space="preserve">Eben ſo ſchwer iſt es, den Gra@ genau zu beſtimmen, <lb/>bis auf welchen man die Elektricität condenſiren, oder die <lb/>elektriſchen Erſcheinungen verſtärken kann; </s>
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4303 <s xml:id="echoid-s2081" xml:space="preserve">auch dies hängt <lb/>von mancherley Umſtänden ab. </s>
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4304 <s xml:id="echoid-s2082" xml:space="preserve">Inzwiſchen iſt die Ver-<lb/>ſtärkung deſto größer, je mehr der Conductor, der der <lb/>Metallplatte Elektricität zuführt, Capacität hat, inglei-<lb/>chen, je ſchwächer die Elektricität iſt. </s>
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4305 <s xml:id="echoid-s2083" xml:space="preserve">So iſt z. </s>
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4306 <s xml:id="echoid-s2084" xml:space="preserve">B. </s>
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4307 <s xml:id="echoid-s2085" xml:space="preserve">der <lb/>atmoſphäriſche Conductor, wenn er gleich kaum die Kraft <lb/>hat, einen Faden anzuziehen, dennoch im Stande, der <lb/>Metallplatte des Elektrophors ſo viel Elektricität zu geben, <lb/>daß ſie nicht allein auf das Elektrometer wirkt, ſondern auch <lb/>ſtarke Funken giebt. </s>
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4308 <s xml:id="echoid-s2086" xml:space="preserve">Iſt hingegen die Elektricität des at-<lb/>moſphäriſchen Conductors ſtark genug, um Funken zu ge-<lb/>ben, oder den Zeiger des Elektrometers 5 bis 6 Grad zu <lb/>erheben, ſo erhebt zwat die Platte des Elektrophors nach
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4309 <pb o="139" file="0159" n="159" rhead="Vom Elektrophor."/>
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4310 ſer Methode den Zeiger auf den höchſten Grad, und giebt <lb/>einen ſtärkern Funken; </s>
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4311 <s xml:id="echoid-s2087" xml:space="preserve">man ſieht aber dennoch deutlich, <lb/>daß die Condenſation in dieſem Falle verhältnißmäßig we-<lb/>niger beträgt, als im vorigen; </s>
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4312 <s xml:id="echoid-s2088" xml:space="preserve">denn d@e Elektricität kann <lb/>niemals bis über einen gewiſſen Grad angehäuft werden, <lb/>d. </s>
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4313 <s xml:id="echoid-s2089" xml:space="preserve">i. </s>
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4314 <s xml:id="echoid-s2090" xml:space="preserve">bis über denjenigen, da ſie ſich nach allen Richtungen <lb/>zerſtreuet. </s>
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4315 <s xml:id="echoid-s2091" xml:space="preserve">Wenn daher die elektriſche Kraft, welche in <lb/>den Condenſator wirkt, dem höchſten Grade am nächſten <lb/>iſt, ſo iſt die Condenſation im Verhältniß ſchwächer. </s>
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4316 <s xml:id="echoid-s2092" xml:space="preserve">In <lb/>dieſem Falle aber iſt auch der Condenſator unnöthig; </s>
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4317 <s xml:id="echoid-s2093" xml:space="preserve">ſeine <lb/>vornehmſte Abſicht iſt, die kleinen Quantitäten von Elek-<lb/>tricität@ anzuhäufen und merklich zu machen, welche ohne <lb/>dieſes Hülfsmittel unmerklich bleiben würden.</s>
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4318 <s xml:id="echoid-s2094" xml:space="preserve"/>
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4319 </p>
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4320 <p>
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4321 <s xml:id="echoid-s2095" xml:space="preserve">Bis hieher haben wir unſern Condenſator nur zu <lb/>Entdeckung der ſchwachen atmoſphäriſchen Elektricität <lb/>gebraucht, welche der Conductor aus der Luft herabbringt; <lb/></s>
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4322 <s xml:id="echoid-s2096" xml:space="preserve">dies iſt nun zwar die Hauptabſicht, aber nicht der einzige <lb/>Gebrauch deſſelben. </s>
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4323 <s xml:id="echoid-s2097" xml:space="preserve">Er entdeckt eben ſowohl die künſtli-<lb/>che Elektricität, wenn ſie ſo ſchwach iſt, daß ſie ſich durch <lb/>kein anderes Mittel bemerken läßt.</s>
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4324 <s xml:id="echoid-s2098" xml:space="preserve"/>
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4325 </p>
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4326 <p>
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4327 <s xml:id="echoid-s2099" xml:space="preserve">Wenn man eine leidner Flaſche ladet, und hierauf <lb/>durch Berührung beyder Seiten mit dem Auslader oder <lb/>der Hand entladet, ſo ſcheint ſie aller Elektricität gänzlich <lb/>beraubt zu ſeyn; </s>
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4328 <s xml:id="echoid-s2100" xml:space="preserve">berührt man aber ihren Knopf mit der <lb/>Metallplatte des Condenſators (indeß dieſelbe auf einer <lb/>unvollkommen leitenden Subſtanz liegt,) und hebt man <lb/>ſie ſogleich ab, ſo giebt ſie merkliche Kennzeichen der Elek-<lb/>tricität von ſich. </s>
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4329 <s xml:id="echoid-s2101" xml:space="preserve">Iſt aber noch ſo viel Ladung in der Fla-<lb/>ſche geblieben, daß ſie einen feinen Faden anziehet, und <lb/>bringt man nun die Metallplatte auf einen Augenblick mit <lb/>dem Knopfe in Berührung, ſo giebt ſie, aufgehoben, ei-<lb/>nen Funken, und wieder berührt, einen faſt eben ſo ſtar-<lb/>ken, und ſo kann man eine lange Zeit hindurch einen Fun-<lb/>ken nach dem andern erhalten.</s>
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4330 <s xml:id="echoid-s2102" xml:space="preserve"/>
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4331 </p>
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4332 <p>
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4333 <s xml:id="echoid-s2103" xml:space="preserve">Man kann durch dieſe Methode, Funken vermittelſt <lb/>einer Flaſche hervorzubringen, welche nicht ſtark geladen
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4334 <pb o="140" file="0160" n="160" rhead="Eilftes Capitel."/>
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4335 iſt, um für ſich ſelbſt Funken zu geben, verſchiedene an-<lb/>genehme Verſuche anſtellen, z. </s>
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4336 <s xml:id="echoid-s2104" xml:space="preserve">B. </s>
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4337 <s xml:id="echoid-s2105" xml:space="preserve">die Piſtole mit entzünd-<lb/>barer Luft losbrennen, oder ein Licht anzünden, beſonders, <lb/>wenn man eine Flaſche nach der Erfindung des Herrn Ca-<lb/>vallo beſitzt, welche man geladen in der Taſche tragen <lb/>kann. </s>
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4338 <s xml:id="echoid-s2106" xml:space="preserve">Dieſe Flaſchen halten eine merkliche Ladung meh-<lb/>rere Tage, und eine unmerkliche mehrere Wochen und Mo-<lb/>nate lang; </s>
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4339 <s xml:id="echoid-s2107" xml:space="preserve">die letztere zeigt ſich freylich ohne Condenſator <lb/>gar nicht, kann aber durch dieſen ſehr merklich gemacht <lb/>werrden, ſo daß ſie zu dem Verſuche mit der elektriſchen <lb/>Piſtole hinreichend iſt.</s>
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4340 <s xml:id="echoid-s2108" xml:space="preserve"/>
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4341 </p>
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4342 <p>
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4343 <s xml:id="echoid-s2109" xml:space="preserve">Zweytens. </s>
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4344 <s xml:id="echoid-s2110" xml:space="preserve">Iſt eine Elektriſirmaſchine in ſo ſchlech-<lb/>tem Stande, daß ihr Conductor keinen Funken geben und <lb/>keinen Faden anziehen will, ſo bringe man die Metallplatte <lb/>des Condenſator@ an dieſen Conductor, und laſſe ſie einige <lb/>Minuten lang daran (inde@ die Maſchine immerfort ge-<lb/>drehet wird). </s>
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4345 <s xml:id="echoid-s2111" xml:space="preserve">Hebt man alsdann die Metallplatte auf, <lb/>ſo wird man einen ſtarken Funken daraus erhalten.</s>
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4346 <s xml:id="echoid-s2112" xml:space="preserve"/>
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4347 </p>
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4348 <p>
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4349 <s xml:id="echoid-s2113" xml:space="preserve">Drittens. </s>
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4350 <s xml:id="echoid-s2114" xml:space="preserve">Wenn zwar die Maſchine gute Wirkung <lb/>thut, aber der Conductor ſo ſchlecht iſolirt iſt, daß er kei-<lb/>nen Funken giebt, weil er entweder mit den Wänden des <lb/>Zimmers, oder durch eine Kette mit dem Boden verbun-<lb/>den iſt, ſo berühre man den Conductor in dieſem Zuſtan-<lb/>de mit der Metallplatte des Condenſators, indem die Ma-<lb/>ſchine immer in Bewegung bleibt, und dieſe Platte wird <lb/>hierauf ziemlich ſtarke Kennzeichen der Elektricität von <lb/>ſich geben; </s>
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4351 <s xml:id="echoid-s2115" xml:space="preserve">woraus man auf das Vermögen dieſes Appa-<lb/>ratus, die Elektricität auszuziehen und anzuhäufen, <lb/>ſchließen kann.</s>
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4352 <s xml:id="echoid-s2116" xml:space="preserve"/>
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4353 </p>
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4354 <p>
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4355 <s xml:id="echoid-s2117" xml:space="preserve">Viertens. </s>
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4356 <s xml:id="echoid-s2118" xml:space="preserve">Wenn ein Elektrometer nicht empfindlich <lb/>genug iſt, um die Stärke einer erregten Elektricität an-<lb/>zugeben, ſo ka@ man dieſe Elektricität leicht durch <lb/>den Condenſator prüfen. </s>
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4357 <s xml:id="echoid-s2119" xml:space="preserve">In dieſer Abſicht reibe man <lb/>die Körper an der Mettallplatte des Condenſators, <lb/>welche hiebey nicht überzogen ſeyn darf; </s>
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4358 <s xml:id="echoid-s2120" xml:space="preserve">wenn man nun-<lb/>wehr dieſe Platte gegen ein Elektrometer hält, ſo wird
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4359 <pb o="141" file="0161" n="161" rhead="Vom Elektrophor."/>
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4360 man daſſelbe beträchtlich elektriſirt finden, wenn gleich <lb/>der geriebene Körper wenig oder gar keine Elektricität er-<lb/>halten hat. </s>
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4361 <s xml:id="echoid-s2121" xml:space="preserve">Ob die Elektricität poſitiv oder negativ ſey, <lb/>kann man leicht beſtimmen, weil die Elektricität t@r Me-<lb/>tallplatte die entgegengeſetzte von der im geriebenen Kör-<lb/>per ſeyn muß. </s>
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4362 <s xml:id="echoid-s2122" xml:space="preserve">Nach dieſer Methode hat Herr Cavallo <lb/>die Elektricität vieler Körper unterſucht. </s>
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4363 <s xml:id="echoid-s2123" xml:space="preserve">Wenn aber die <lb/>zu unterſuchenden Körper ſich nicht leicht an die Metall-<lb/>platte bringen laſſen, ſo kann man ſich noch beſſer folgen-<lb/>der Methode bedienen. </s>
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4364 <s xml:id="echoid-s2124" xml:space="preserve">Man legt die Metallplatte auf <lb/>die unvollkommen leitende Fläche, reibt oder ſtreicht den <lb/>zu unterſuchenden Körper dagegen, und hebt alsdann die <lb/>Platte ab, um ſie mit dem Elektrometer zu unterſuchen. <lb/></s>
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4365 <s xml:id="echoid-s2125" xml:space="preserve">Iſt der unterſuchte Körper Leder, eine Schnur, Leinwand, <lb/>Sammet, oder ein anderer ähnlicher unvollkommener Lei-<lb/>ter, ſo wird man die Platte gewiß elektriſirt finden, und <lb/>zwar auf dieſe Art viel ſtärker, als wenn ſie iſolirt in der <lb/>Luft ſchwebend mit eben dem Körper wäre gerieben wor-<lb/>den. </s>
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4366 <s xml:id="echoid-s2126" xml:space="preserve">Kurz durch die eine oder die andere Methode wird <lb/>man Elektricität aus Körpern erhalten, von welchen man <lb/>kaum irgend einige erwarten ſollte; </s>
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4367 <s xml:id="echoid-s2127" xml:space="preserve">auch wenn ſie nich@ <lb/>ſehr trocken ſind. </s>
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4368 <s xml:id="echoid-s2128" xml:space="preserve">Alle Körper, nur Kohlen und Metalle aus-<lb/>genommen, werden einige Elektricität geben. </s>
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4369 <s xml:id="echoid-s2129" xml:space="preserve">Man erhält <lb/>oft ſogar einige durch Streichen mit der bloßen Hand.</s>
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4370 <s xml:id="echoid-s2130" xml:space="preserve"/>
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4371 </p>
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4372 <p>
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4373 <s xml:id="echoid-s2131" xml:space="preserve">Die Metallplatte hat, wie man aus den vorherge-<lb/>henden Verſuchen ſieht, ein weit größeres Vermögen, die <lb/>Elektricität an ſich zu halten, wenn ſie auf einer dazu ge-<lb/>hörigen Fläche liegt, als wenn ſie ganz iſolirt iſt.</s>
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4374 <s xml:id="echoid-s2132" xml:space="preserve"/>
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4375 </p>
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4376 <p>
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4377 <s xml:id="echoid-s2133" xml:space="preserve">Man ſieht leicht, daß die Stärke der Elektricität <lb/>in Proportion geringer ſeyn muß, wenn die Capacität, <lb/>Elektricität zu halten, größ@r iſt; </s>
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4378 <s xml:id="echoid-s2134" xml:space="preserve">denn es iſt alsdann eine <lb/>größere Menge erforderlich, um ſie bis auf einen beſtimm-<lb/>ten Grad der Stärke zu erheben; </s>
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4379 <s xml:id="echoid-s2135" xml:space="preserve">daß ſich alſo die Ca-<lb/>pacität umgekehrt verhält, wie die Intenſität, wor-<lb/>unter wir das Beſtreben verſtehen, mit welchem die Elek-<lb/>tricität eines elektriſirten Körpers aus allen ſeinen Theilen
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4380 <pb o="142" file="0162" n="162" rhead="Eilftes Capitel."/>
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4381 auszugehen ſucht, mit welchem Beſtreben die elektriſchen <lb/>Phänomene des Anziehens und Zurückſtoßens, und be-<lb/>ſonders der Grad der Erhebung des Elektrometers über-<lb/>einſtimmen.</s>
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4382 <s xml:id="echoid-s2136" xml:space="preserve"/>
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4383 </p>
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4384 <p>
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4385 <s xml:id="echoid-s2137" xml:space="preserve">Daß ſich die Intenſität der Elektricität umgekehrt <lb/>wie die Capacität des elektriſirten Körpers verhalte, <lb/>wird aus folgendem Verſuche deutlich erhellen.</s>
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4386 <s xml:id="echoid-s2138" xml:space="preserve"/>
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4387 </p>
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4388 </div>
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4389 <div xml:id="echoid-div212" type="section" level="1" n="205">
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4390 <head xml:id="echoid-head225" xml:space="preserve">174. Verſuch.</head>
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4391 <p>
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4392 <s xml:id="echoid-s2139" xml:space="preserve">Man nehme zween metallene Stäbe von gleichem <lb/>Durchmeſſer, den einen 1 Schuh, den andern 5 Schuh <lb/>lang; </s>
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4393 <s xml:id="echoid-s2140" xml:space="preserve">elektriſire den erſten ſo lange, bis der Zeiger des <lb/>Elektrometers auf 60° ſteigt, und bringe ihn ſodann mit <lb/>dem andern Stabe in Berührung- ſo iſt in dieſem Falle <lb/>klar, daß die Intenſität der Elektricität, die ſich jezt <lb/>durch beyde Stäbe vertheilt, deſto mehr abnehmen muß, <lb/>je mehr die Capacität zunimmt; </s>
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4394 <s xml:id="echoid-s2141" xml:space="preserve">daß alſo der Zeiger des <lb/>Elektrometers, der ſich vorher bis 60° erhob, nun auf 10° <lb/>herabfallen, d.</s>
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4395 <s xml:id="echoid-s2142" xml:space="preserve">i. </s>
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4396 <s xml:id="echoid-s2143" xml:space="preserve">nur den ſechſten Theil der vorigen Inten-<lb/>ſität zeigen muß. </s>
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4397 <s xml:id="echoid-s2144" xml:space="preserve">Eben ſo müßte die Intenſität, wenn <lb/>man eben ſo viel Elektricität einem 60 Schuh langen <lb/>Stabe mitgetheilt hätte, auf einen Grad herabfallen; </s>
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4398 <s xml:id="echoid-s2145" xml:space="preserve">hät-<lb/>te man hingegen die Elektricität des langen Conductors in <lb/>den 60ſten Theil der Capacität deſſen zuſammengedrängt, <lb/>ſo würde die Intenſität bis 60° gewachſen ſeyn.</s>
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4399 <s xml:id="echoid-s2146" xml:space="preserve"/>
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4400 </p>
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4401 <p>
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4402 <s xml:id="echoid-s2147" xml:space="preserve">Nicht allein Conductoren von verſchiedener Größe <lb/>haben verſchiedene Capacitäten, Elektricität in ſich zu hal-<lb/>ten, ſondern es wird auch die Capacität eines und eben <lb/>deſſelben Conductors vergrößert oder vermindert, je nach-<lb/>dem man ſeine Oberfläche größer oder geringer macht; <lb/></s>
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4403 <s xml:id="echoid-s2148" xml:space="preserve">wie man aus D. </s>
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4404 <s xml:id="echoid-s2149" xml:space="preserve">Franklin’s Verſuche mit dem Becher <lb/>und der Kette ſieht, aus welchem man geſchloſſen hat, daß <lb/>die Capacität der Conductoren im Verhältniß ihrer Ober-<lb/>fläche, und nicht ihrer Maſſe, wachſe.</s>
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4405 <s xml:id="echoid-s2150" xml:space="preserve"/>
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4406 </p>
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4407 <pb o="143" file="0163" n="163" rhead="Vom Elektrophor."/>
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4408 <p>
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4409 <s xml:id="echoid-s2151" xml:space="preserve">Man hat die oben angeführten Umſtände, durch <lb/>welche die natürliche Capacität der Conductoren ſo be-<lb/>trächtlich verſtärkt wird, bi@her gänzlich überſehen, und <lb/>daher noch keine Vortheile daraus gezogen. </s>
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4410 <s xml:id="echoid-s2152" xml:space="preserve">Der folgen-<lb/>de Verſuch wird dieſe Verſtärkung der Capacität auf die <lb/>einfachſte Art zeigen.</s>
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4411 <s xml:id="echoid-s2153" xml:space="preserve"/>
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4412 </p>
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4413 </div>
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4414 <div xml:id="echoid-div213" type="section" level="1" n="206">
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4415 <head xml:id="echoid-head226" xml:space="preserve">175. Verſuch.</head>
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4416 <p>
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4417 <s xml:id="echoid-s2154" xml:space="preserve">Man nehme die Metallplatte eines Elektrophors, <lb/>halte ſie bey ihrem Handgriffe in der Luft, und elektriſire <lb/>ſie ſo ſtark, daß der Zeiger eines damit verbundenen Elek-<lb/>trometers bis 60° ſteigt; </s>
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4418 <s xml:id="echoid-s2155" xml:space="preserve">hierauf laſſe man dieſe Platte <lb/>nach und nach gegen den Tiſch, oder eine andere ebne lei-<lb/>tende Fläche zu ſinken, ſo wird der Zeiger nach und nach <lb/>von 60° auf 50°, 40°, 30° u. </s>
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4419 <s xml:id="echoid-s2156" xml:space="preserve">ſ. </s>
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4420 <s xml:id="echoid-s2157" xml:space="preserve">w. </s>
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4421 <s xml:id="echoid-s2158" xml:space="preserve">fallen. </s>
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4422 <s xml:id="echoid-s2159" xml:space="preserve">Dennoch <lb/>bleibt in der Platte immer eben dieſelbe Menge von Elek-<lb/>tricität, ſie müßte denn ſo nahe an den Tiſch gebracht wer-<lb/>den, daß dadurch ein Uebergang der Elektricität aus der <lb/>Platte in den Tiſch veranlaſſet würde; </s>
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4423 <s xml:id="echoid-s2160" xml:space="preserve">wenigſtens bleibt <lb/>ſie in ſo fern immer von gleicher Größe, als ihr durch die <lb/>Feuchtigkeit der Luft u. </s>
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4424 <s xml:id="echoid-s2161" xml:space="preserve">dgl. </s>
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4425 <s xml:id="echoid-s2162" xml:space="preserve">nichts entzogen wird. </s>
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4426 <s xml:id="echoid-s2163" xml:space="preserve">Die <lb/>Abnahme der Intenſität kömmt alſo bloß von der verſtärk-<lb/>ten Capacität der Platte her, welche nicht mehr völlig iſo-<lb/>lirt, oder abgeſondert ſondern combinitt, oder eini-<lb/>germaſſen mit einem andern Leiter verbunden iſt: </s>
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4427 <s xml:id="echoid-s2164" xml:space="preserve">denn <lb/>wenn man die Platte nach und nach wieder von dem Tiſche <lb/>entfernet, ſo ſteigt das Elektrometer wieder auf den vori-<lb/>gen Grad, nämlich 60°; </s>
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4428 <s xml:id="echoid-s2165" xml:space="preserve">den Verluſt abgerechnet, den ſie <lb/>während des Verſuchs durch die Luft a. </s>
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4429 <s xml:id="echoid-s2166" xml:space="preserve">kann gelitten <lb/>haben.</s>
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4430 <s xml:id="echoid-s2167" xml:space="preserve"/>
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4431 </p>
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4432 <p>
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4433 <s xml:id="echoid-s2168" xml:space="preserve">Dieſe Urſache dieſer Erſcheinung läßt ſich leicht aus <lb/>der Wirkung der elektriſchen Atmoſphären erklären. </s>
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4434 <s xml:id="echoid-s2169" xml:space="preserve">Die <lb/>Atmoſphäre der Metallplatte, die ich jezt für poſitiv elektri-<lb/>ſirt annehmen will, wirkt auf den Tiſch, oder ſonſt auf <lb/>den Leiter, dem dieſelbe genähert wird: </s>
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4435 <s xml:id="echoid-s2170" xml:space="preserve">ſo, daß die elek-<lb/>triſche Materie im Tiſche, in dem ſie ſich gegen die ent-
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4436 <pb o="144" file="0164" n="164" rhead="Eilftes Capitel."/>
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4437 ferntern Theile deſſelben zurückziehet, in denjenigen Thei-<lb/>len, welche ſich gegen die Metallplatte zu kehren, dünner <lb/>wird, und dieſe Verdünnung zunimmt, je näher die Me-<lb/>tallplatte dem Tiſche gebracht wird. </s>
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4438 <s xml:id="echoid-s2171" xml:space="preserve">Iſt dieſe Platte ne-<lb/>gativ elektriſirt, ſo findet die entgegengeſetzte Wirkung <lb/>ſtatt. </s>
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4439 <s xml:id="echoid-s2172" xml:space="preserve">Kurz, die Theile, welche in den Wirkungskreis <lb/>der elektriſirten Platte kommen, erhalten eine entgegenge-<lb/>ſetzte Elektricität, und geben dadurch der Elektricität der <lb/>Metallplatte Anlaß, ſich auszubreiten, daher die Inten-<lb/>ſität derſelben vermindert wird, wie ſich dies durch das <lb/>Herabſinken des Zeigers am Elektrometer deutlich an den <lb/>Tag leget.</s>
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4440 <s xml:id="echoid-s2173" xml:space="preserve"/>
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4441 </p>
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4442 <p>
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4443 <s xml:id="echoid-s2174" xml:space="preserve">Die beyden folgenden Verſuche verbreiten noch mehr <lb/>licht über die gegenſeitige Wirkung der elektriſchen At-<lb/>moſphären.</s>
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4444 <s xml:id="echoid-s2175" xml:space="preserve"/>
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4445 </p>
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4446 </div>
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4447 <div xml:id="echoid-div214" type="section" level="1" n="207">
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4448 <head xml:id="echoid-head227" xml:space="preserve">176. Verſuch.</head>
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4449 <p>
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4450 <s xml:id="echoid-s2176" xml:space="preserve">Man elektriſire zween flache Leiter, beyde entweder <lb/>poſitiv oder negativ, und nähere ſie einander allmählich, <lb/>ſo wird man an den damit verbundenen Elektrometern se-<lb/>hen, daß ihre Elektricitäten immer ſtärker werden, je nä-<lb/>her ſie einander kommen, indem alle elaſtiſche Körper in <lb/>eben dem Verhältniſſ@ widerſtehen, in welchem auf ſie <lb/>gewirkt wird; </s>
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4451 <s xml:id="echoid-s2177" xml:space="preserve">woraus man ſieht, daß jede von den bey-<lb/>den mit einander verbundenen Kräften, jezt weit we-<lb/>niger Capacität hat, mehr elektriſche Materie anzuneh-<lb/>men, als vorher, da beyde einzeln iſolirt waren, und kei-<lb/>nen Einfluß auf einander hatten. </s>
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4452 <s xml:id="echoid-s2178" xml:space="preserve">Aus dieſem Verſuche <lb/>läßt ſich erklären, warum die Spannung der elektriſchen <lb/>Atmoſphäre bey einem elektriſirten Leiter größer wird, <lb/>wenn man ſie in einen engern Raum zuſammenziehet; </s>
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4453 <s xml:id="echoid-s2179" xml:space="preserve">in-<lb/>gleichen, warum ein lang ausgedehnter Leiter bey gleicher <lb/>Oberfläche und gleicher Menge von Elektricität weniger <lb/>Intenſität zeigt, als ein mehr compakter; </s>
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4454 <s xml:id="echoid-s2180" xml:space="preserve">weil im erſten <lb/>Falle die gleichartigen Atmoſphären der Theile des Leiters <lb/>weiter aus einander liegen, als im letztern, und alſo, da
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4455 <pb o="145" file="0165" n="165" rhead="Vom Elektrophor."/>
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4456 die Wirkung ſchwächer iſt, auch die Gegenwirkung gerin-<lb/>ger ſeyn muß.</s>
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4457 <s xml:id="echoid-s2181" xml:space="preserve"/>
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4458 </p>
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4459 </div>
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4460 <div xml:id="echoid-div215" type="section" level="1" n="208">
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4461 <head xml:id="echoid-head228" xml:space="preserve">177. Verſuch.</head>
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4462 <p>
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4463 <s xml:id="echoid-s2182" xml:space="preserve">Man elektriſire den einen von dieſen flachen Leitern <lb/>poſitiv, und den andern negativ, ſo werden die Wirkun-<lb/>gen gerade die entgegengeſetzten ſeyn; </s>
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4464 <s xml:id="echoid-s2183" xml:space="preserve">d. </s>
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4465 <s xml:id="echoid-s2184" xml:space="preserve">i. </s>
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4466 <s xml:id="echoid-s2185" xml:space="preserve">die Intenſ@-<lb/>tät der Elektricitäten wird abnehmen, weil die Capacitä-<lb/>ten, oder die Kräfte ſich auszubreiten, deſto größer wer-<lb/>den, je näher die Leiter zu einander kommen.</s>
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4467 <s xml:id="echoid-s2186" xml:space="preserve"/>
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4468 </p>
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4469 <p>
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4470 <s xml:id="echoid-s2187" xml:space="preserve">Man kann nunmehr die Erklärung dieſes letztern <lb/>Verſuchs auch auf den vorher erwähnten Fall anwenden, <lb/>da man nämlich die elektriſirte Metallplatte gegen eine <lb/>nicht iſolirte leitende Fläche bringt. </s>
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4471 <s xml:id="echoid-s2188" xml:space="preserve">Denn, da dieſe Flä-<lb/>che eine entgegengeſetzte Elektricität erhält, ſo folgt, daß <lb/>die Intenſität der Elektricität in der Metallplatte abneh-<lb/>men müſſe, und das mit ihr verbundene Elektrometer <lb/>fällt immer weiter herab, je mehr die Capacität der Plat-<lb/>te zunimmt, oder die Dichtigkeit ihrer Atmoſphäre ver-<lb/>mindert wird; </s>
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4472 <s xml:id="echoid-s2189" xml:space="preserve">folglich iſt die Platte unter dieſen Umſtän-<lb/>den im Stande, eine größere Menge Elektricität an-<lb/>zunehmen.</s>
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4473 <s xml:id="echoid-s2190" xml:space="preserve"/>
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4474 </p>
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4475 <p>
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4476 <s xml:id="echoid-s2191" xml:space="preserve">Dies wird noch deutlicher durch folgenden Verſuch:</s>
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4477 <s xml:id="echoid-s2192" xml:space="preserve"/>
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4478 </p>
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4479 </div>
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4480 <div xml:id="echoid-div216" type="section" level="1" n="209">
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4481 <head xml:id="echoid-head229" xml:space="preserve">178. Verſuch.</head>
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4482 <p>
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4483 <s xml:id="echoid-s2193" xml:space="preserve">Man iſolire die leitende Fläche, indem die andere <lb/>elektriſirte Platte darauf liegt, und trenne dann beyde von <lb/>einander, ſo wird man beyde, ſo wohl die Metallplatte, <lb/>als auch die leitende Fläche (welche man auch die untere <lb/>Platte nennen kann) elektriſirt finden, aber, wie die Elek-<lb/>trometer zeigen werden, mit entgegengeſetzten Elektri-<lb/>citäten.</s>
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4484 <s xml:id="echoid-s2194" xml:space="preserve"/>
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4485 </p>
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4486 <p>
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4487 <s xml:id="echoid-s2195" xml:space="preserve">Wird die untere Platte erſt iſolirt, und dann die <lb/>elektriſirte Platte darauf geſetzt, ſo wird die letztere in der <lb/>erſtern ein Beſtreben nach entgegengeſetzter Elektricität <lb/>erregen, welche aber wegen der Iſolirung nicht wirklich
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4488 <pb o="146" file="0166" n="166" rhead="Eilftes Capitel."/>
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4489 entſtehen kann; </s>
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4490 <s xml:id="echoid-s2196" xml:space="preserve">daher wird die Intenſitat der Elektricität <lb/>in der Platte nicht verringert, wenigſtens zeigt das Elek-<lb/>trometer nur ein ſehr geringes und faſt unmerkliches Fal-<lb/>len, welches von der Unvollkommenheit der Iſolirung der <lb/>untern Platte, und von der geringen Verdünnung und <lb/>Verdichtung der elektriſchen Materie in den verſchiedenen <lb/>Stellen dieſer Platte herkömmt. </s>
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4491 <s xml:id="echoid-s2197" xml:space="preserve">Wenn man aber unter <lb/>dieſen Umſtänden die untere Platte ſo berührt, daß die <lb/>Iſolirung auf einen Augenblick unterbrochen wird, ſo er-<lb/>hält ſie die entgegengeſetzte Elektricität, und die Intenſi-<lb/>tät in der Metallplatte wird ſchwächer.</s>
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4492 <s xml:id="echoid-s2198" xml:space="preserve"/>
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4493 </p>
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4494 <p>
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4495 <s xml:id="echoid-s2199" xml:space="preserve">Wäre die untere Platte, anſtatt @ſolirt zu ſeyn, ſelbſt <lb/>eine nicht leitende Subſtanz, ſo würden eben die Phäno-<lb/>mene erfolgen, d. </s>
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4496 <s xml:id="echoid-s2200" xml:space="preserve">i. </s>
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4497 <s xml:id="echoid-s2201" xml:space="preserve">die Intenſität der darauf liegenden <lb/>elektriſirten Metallplatte würde nicht vermindert werden. <lb/></s>
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4498 <s xml:id="echoid-s2202" xml:space="preserve">Dennoch geſchieht dies nicht allezeit; </s>
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4499 <s xml:id="echoid-s2203" xml:space="preserve">denn wenn die un-<lb/>tere nicht leitende Platte ſehr dünn iſt, und auf einem Lei-<lb/>@er liegt, ſo wird die Intenſität der elektriſirten Metall-<lb/>platte vermindert, und ihre Capacität vergrößert, wenn <lb/>ſie auf den dünnen iſolirenden Körper gelegt wird; </s>
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4500 <s xml:id="echoid-s2204" xml:space="preserve">weil in <lb/>dieſem Falle die leitende Subſtanz, welche unter dem <lb/>nicht leitenden Körper liegt, eine der Metallplatte entge-<lb/>gengeſetzte Elektricität erhält, und alſo ihre Intenſität <lb/>vermindert u. </s>
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4501 <s xml:id="echoid-s2205" xml:space="preserve">ſ. </s>
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4502 <s xml:id="echoid-s2206" xml:space="preserve">w. </s>
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4503 <s xml:id="echoid-s2207" xml:space="preserve">Der iſolitende Körper vermindert <lb/>hiebey nur die wechſelſeitige Wirkung beyder Atmoſphä-<lb/>ren mehr oder weniger, je nachdem er ſie weiter oder we-<lb/>niger aus einander hält.</s>
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4504 <s xml:id="echoid-s2208" xml:space="preserve"/>
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4505 </p>
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4506 <p>
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4507 <s xml:id="echoid-s2209" xml:space="preserve">Die Intenſität oder die elektriſche Wirkung der Me-<lb/>kallplatte, welche nach und nach abnimmt, je näher die-<lb/>ſelbe an eine nicht iſolirte leitende Fläche gebracht wird, <lb/>verſchwindet faſt gänzlich, wenn die Platte beynahe in <lb/>Berührung mit der Fläche kömmt, weil hier das natür-<lb/>liche Gleichgewicht beynahe vollkommen wird. </s>
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4508 <s xml:id="echoid-s2210" xml:space="preserve">Wenn <lb/>daher die untere Platte dem Durchgange der Elektricität <lb/>nur den geringſten Widerſtand entgegenſetzt (es mag
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4509 <pb o="147" file="0167" n="167" rhead="Vom Elektrophor."/>
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4510 nun derſelbe von einem dünnen elektriſchen Ueberzuge, oder <lb/>von der unvollkommen leitenden Natur der Fläche, wie <lb/>bey trocknem Holz, Marmor @. </s>
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4511 <s xml:id="echoid-s2211" xml:space="preserve">herrühren), ſo kann <lb/>dieſer Widerſtand, verbunden mit dem, obgleich gerin-<lb/>gen, Zwiſchenraume zwiſchen beyden Platten, von der ge-<lb/>ringen Intenſität der Elektricität in der Metallplatte nicht <lb/>überwunden werden. </s>
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4512 <s xml:id="echoid-s2212" xml:space="preserve">Daher giebt dieſe Platte der un-<lb/>tern Fläche keinen Funken (es müßte denn ihre Elektrici-<lb/>tät ſehr ſtark, oder ihr Rand nicht wohl abgerundet ſeyn) <lb/>und behält vielmehr ihre Elektricität; </s>
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4513 <s xml:id="echoid-s2213" xml:space="preserve">daß alſo das Elek-<lb/>trometer, wenn man ſie von der untern Platte abhebt, bey-<lb/>nahe wieder auf ſeine vorige Höhe ſteigt. </s>
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4514 <s xml:id="echoid-s2214" xml:space="preserve">Die elektriſirte <lb/>Platte kann ſogar mit der unvollkommen leitenden Fläche <lb/>in Berührung gebracht werden, und eine Zeit lang in <lb/>dieſer Stellung verbleiben; </s>
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4515 <s xml:id="echoid-s2215" xml:space="preserve">in welchem Falle die Intenſi-<lb/>tät beynahe bis auf Nichts herabſinkt, und daher die Elek-<lb/>tricität nur ſehr langſam in die untere Platte übergeht. <lb/></s>
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4516 <s xml:id="echoid-s2216" xml:space="preserve">Ganz anders aber iſt der Fall, wenn bey Anſtellung dieſes <lb/>Verſuchs die elektriſirte Metallplatte die untere mit der <lb/>Schärfe des Randes berührt; </s>
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4517 <s xml:id="echoid-s2217" xml:space="preserve">denn alsdann iſt ihre Inten-<lb/>ſität größer, als wenn ſie flach liegt, wie das Elektrometer <lb/>zeigt, die Elektricität überwindet alſo den ſchwachen Wi-<lb/>derſtand, und geht in die untere Fläche über, auch wohl <lb/>durch einen dünnen elektriſchen Ueberzug, weil die Elek-<lb/>tricität der einen Platte von der Elektricität der andern <lb/>nur im Verhältniß der Menge von Oberfläche, welche ſie <lb/>einander innerhalb einer gegebenen Diſtanz entgegenſtel-<lb/>len, im Gleichgewicht erhalten wird, daß ſich alſo die <lb/>Elektricität gar nicht zerſtreuet, wenn die Platten einan-<lb/>der flach und in vielen Punkten berühren. </s>
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4518 <s xml:id="echoid-s2218" xml:space="preserve">Dieſes an-<lb/>ſcheinende Paradoron erklärt ſich ſehr deutlich aus der <lb/>Theorie der elektriſchen Atmoſphären.</s>
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4519 <s xml:id="echoid-s2219" xml:space="preserve"/>
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4520 </p>
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4521 <p>
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4522 <s xml:id="echoid-s2220" xml:space="preserve">Noch ſonderbarer ſcheint es, daß nicht einmal die <lb/>Berührung mit dem Finger oder mit einem Metallſtabe, <lb/>die Metallplatte ihrer ganzen Elektricität beraubt, wenn <lb/>ſie auf der untern Fläche aufſtehet; </s>
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4523 <s xml:id="echoid-s2221" xml:space="preserve">ſie bleibt gemeinig-
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4524 <pb o="148" file="0168" n="168" rhead="Eilftes Capitel."/>
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4525 lich noch ſo ſtark elektriſirt, daß ſie nach dem Aufheben <lb/>noch einen Funken giebt. </s>
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4526 <s xml:id="echoid-s2222" xml:space="preserve">In der That würde dieſes Phä-<lb/>nomen ganz unerklärbar ſeyn, wenn man den Finger oder <lb/>die Metalle für vollkommene Leiter annehmen müßte. <lb/></s>
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4527 <s xml:id="echoid-s2223" xml:space="preserve">Da wir aber gar keinen Körper kennen, der ein vollkom-<lb/>mener Leiter wäre, ſo läßt ſich annehmen, daß das Metall <lb/>oder der Finger hinreichend wiederſtehe, um die Zerſtreu-<lb/>ung der Elektricität der Platte zu verhindern, welche auch <lb/>in dieſem Falle durch einen ſehr geringen Grad von In-<lb/>tenſität oder Beſtreben nach Ausbreitung angetrieben <lb/>wird. </s>
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4528 <s xml:id="echoid-s2224" xml:space="preserve">Man nehme z. </s>
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4529 <s xml:id="echoid-s2225" xml:space="preserve">B. </s>
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4530 <s xml:id="echoid-s2226" xml:space="preserve">an, das Metall oder der Finger, <lb/>der die Platte berührt, nehme ſo viel von ihrer Elektrici-<lb/>tät hinweg, daß dadurch die Intenſität des Ueberreſts auf <lb/>den 50 ſten Theil eines Grades herabgeſetzt werde, ſo wird <lb/>dieſer Ueberreſt jezt kaum merklich ſeyn; </s>
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4531 <s xml:id="echoid-s2227" xml:space="preserve">wenn aber die <lb/>Platte aufgehoben und dadurch ihre Capacität ſo ſehr ver-<lb/>mindert wird, daß ihre Elektricität eine 100mal größere <lb/>Intenſität erhält, ſo ſteigt ſie auf 2 Grad und drüber, <lb/>d. </s>
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4532 <s xml:id="echoid-s2228" xml:space="preserve">i. </s>
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4533 <s xml:id="echoid-s2229" xml:space="preserve">ſie wird ſtark genug, um einen Funken zu geben.</s>
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4534 <s xml:id="echoid-s2230" xml:space="preserve"/>
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4535 </p>
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4536 <p>
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4537 <s xml:id="echoid-s2231" xml:space="preserve">Wir haben nunmehr die Wirkung der elektriſchen <lb/>Atmoſphären auf die Elektricität der Metallplatte in ver-<lb/>ſchiedenen Stellungen betrachtet, und es wäre noch übrig, <lb/>die Wirkungen zu unterſuchen, welche ſtatt finden, wenn <lb/>eine Metallplatte auf der untern Fläche ſtehend, elektriſi-<lb/>ret wird. </s>
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4538 <s xml:id="echoid-s2232" xml:space="preserve">Da die ganze Sache im vorigen völlig ausge-<lb/>führet iſt, ſo iſt es ſehr leicht, die Anwendung auch auf <lb/>dieſen Fall zu machen; </s>
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4539 <s xml:id="echoid-s2233" xml:space="preserve">inzwiſchen wird es doch nicht ohne <lb/>Nutzen ſeyn, dieſe Anwendung beyſpielsweiſe durch einen <lb/>Verſuch zu erläutern.</s>
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4540 <s xml:id="echoid-s2234" xml:space="preserve"/>
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4541 </p>
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4542 </div>
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4543 <div xml:id="echoid-div217" type="section" level="1" n="210">
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4544 <head xml:id="echoid-head230" xml:space="preserve">179. Verſuch.</head>
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4545 <p>
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4546 <s xml:id="echoid-s2235" xml:space="preserve">Man ſetze, eine leidner Flaſche oder ein Conductor <lb/>ſey ſo ſchwach elektriſirt, daß ſeine Intenſität nur einen <lb/>halben Grad oder noch weniger betrage. </s>
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4547 <s xml:id="echoid-s2236" xml:space="preserve">Wenn nun die auf <lb/>ihrer untern Fläche ſtehende Metallplatte des Condenſa-
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4548 <pb o="149" file="0169" n="169" rhead="Vom Elektrophor."/>
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4549 @ors mit dieſer Flaſche oder dieſem Conductor berührt <lb/>wird, ſo iſt klar, daß ihr beyde einen ſo großen Theil ih-<lb/>rer Elektricität mittheilen werden, als der Capacität der <lb/>Platte proportional iſt, d. </s>
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4550 <s xml:id="echoid-s2237" xml:space="preserve">i. </s>
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4551 <s xml:id="echoid-s2238" xml:space="preserve">ſo viel, daß dadurch die <lb/>Elektricität der Platte eine gleiche Intenſität mit der Elek-<lb/>tricität des Conductors erhält, beyde nämlich einen hal-<lb/>ben Grad. </s>
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4552 <s xml:id="echoid-s2239" xml:space="preserve">Da aber die Capacität der Platte anjetzt, da <lb/>ſie auf einer gehörig zubereiteten Fläche liegt, z. </s>
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4553 <s xml:id="echoid-s2240" xml:space="preserve">B. </s>
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4554 <s xml:id="echoid-s2241" xml:space="preserve">100 <lb/>mal größer iſt, als wenn ſie iſolirt in der Luft ſchwebte, <lb/>ſo nimmt ſie auch 100 mal mehr Elektricität aus der Fla-<lb/>ſche oder dem Conductor an. </s>
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4555 <s xml:id="echoid-s2242" xml:space="preserve">Hieraus folgt natürlich, <lb/>daß, wenn die Metallplatte von der untern Fläche auf <lb/>{1/100} ihrer vorigen Größe herabgeſetz@ wird, die Intenſi-<lb/>tät 100 mal größer werden, alſo bis auf 50° ſteigen müſ-<lb/>ſe, da ſie in der Flaſche oder im Conductor nur {1/2} Grad <lb/>betrug.</s>
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4556 <s xml:id="echoid-s2243" xml:space="preserve"/>
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4557 </p>
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4558 <p>
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4559 <s xml:id="echoid-s2244" xml:space="preserve">Da eine ſo geringe Elektricität die Metallplatte des <lb/>Condenſators in Stand ſetzt, einen ſtarken Funken zu ge-<lb/>ben, ſo könnte man fragen, was eine ſtärkere Elektricität <lb/>thun werde. </s>
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4560 <s xml:id="echoid-s2245" xml:space="preserve">Warum thut dieſe letztere nichts mehr? <lb/></s>
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4561 <s xml:id="echoid-s2246" xml:space="preserve">Die Antwort iſt, weil die der Metallplatte mitgetheilte <lb/>Elektricität lzerſtreuet wird, ſo bald ſie ſo groß iſt, daß <lb/>ſie den ſchwachen Widerſtand der untern Platte überwin-<lb/>den kann.</s>
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4562 <s xml:id="echoid-s2247" xml:space="preserve"/>
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4563 </p>
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4564 <p>
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4565 <s xml:id="echoid-s2248" xml:space="preserve">Man begreift leicht, daß die Metallplatte, wenn ſie <lb/>gleich aus einer leidner Flaſche oder einem großen Con-<lb/>ductor, wenn er auch ſchwach elektriſirt iſt, eine große <lb/>Menge Elektricität annehmen kann, dennoch keine be-<lb/>trächtliche Menge aus einem Conductor von geringer Ca-<lb/>pacität erhalten könne; </s>
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4566 <s xml:id="echoid-s2249" xml:space="preserve">denn dieſer Conductor kann ihr <lb/>das nicht geben, was er ſelbſt nicht hat, er müßte denn <lb/>beſtändig einen neuen, obgleich ſchwachen, Zufluß erhal-<lb/>ten. </s>
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4567 <s xml:id="echoid-s2250" xml:space="preserve">Dies iſt der Fall bey einem atmoſphäriſchen Con-<lb/>ductor, oder bey dem Conductor einer Maſchine, welche <lb/>zwar ſchwach, aber doch unaufhörlich fortwirkt. </s>
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4568 <s xml:id="echoid-s2251" xml:space="preserve">In die-<lb/>ſen Fällen aber iſt eine ziemliche Zeit nöthig, ehe die-
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4569 <pb o="150" file="0170" n="170" rhead="Eilftes Capitel."/>
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4570 Metallplatte einen hinreichenden Grad von Elektricität <lb/>erhält.</s>
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4571 <s xml:id="echoid-s2252" xml:space="preserve"/>
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4572 </p>
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4573 <p>
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4574 <s xml:id="echoid-s2253" xml:space="preserve">Da ein großer, aber ſchwach elektriſirter Conductor <lb/>der Metallplatte des Condenſators eine beträchtliche Men-<lb/>ge Elektricität mittheilt, und dieſe Elektricität nach auf-<lb/>gehobener Platte ſehr verdichtet und verſtärkt erſcheint; </s>
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4575 <s xml:id="echoid-s2254" xml:space="preserve">ſo <lb/>kann man, wenn auch dieſe Platte noch zu wenig Elek-<lb/>tricität enthält, um einen Funken zu geben oder das Elek-<lb/>trometer zu bewegen, dieſe Elektricität merklicher machen, <lb/>wenn man ſie einer andern kleinern Platte oder einem <lb/>zweyten Condenſator mittheilt.</s>
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4576 <s xml:id="echoid-s2255" xml:space="preserve"/>
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4577 </p>
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4578 <p>
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4579 <s xml:id="echoid-s2256" xml:space="preserve">Auf dieſe Verbeſſerung verfiel zuerſt Herr Cavallo <lb/>durch Nachdenken über die Verſuche des Volta. </s>
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4580 <s xml:id="echoid-s2257" xml:space="preserve">Er <lb/>gebrauchte dazu eine kleine Metallplatte, welche nicht <lb/>größer war, als ein Schilling. </s>
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4581 <s xml:id="echoid-s2258" xml:space="preserve">Dieſer zweyte Conden-<lb/>ſator iſt in vielen Fällen brauchbar, wo die Elektricität <lb/>ſo ſchwach iſt, daß man ſie durch einen Condenſator allein <lb/>gar nicht, oder doch nicht deutlich, bemerkt. </s>
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4582 <s xml:id="echoid-s2259" xml:space="preserve">Bisweilen <lb/>erhält die gewöhnliche Metallplatte meines Condenſators <lb/>ſo wenig Elektricität, daß ſie, von der untern Fläche weg-<lb/>genommen, und gegen ein höchſt empfindliches von Herrn <lb/>Cavallo verfertigtes Elektrometer gehalten, gar nicht <lb/>auf dieſes letztere wirkt. </s>
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4583 <s xml:id="echoid-s2260" xml:space="preserve">Wenn ich in dieſem Falle dieſe <lb/>ſo ſchwach elektriſirte Platte an die gehörig aufgeſtellte <lb/>kleinere Platte bringe, und dieſe alsdann gegen ein Elek-<lb/>trometer halte, ſo iſt die Elektricität gemeiniglich ſtärker, <lb/>als zu Beſtimmung ihrer Beſchaffenheit nöthig wäre.</s>
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4584 <s xml:id="echoid-s2261" xml:space="preserve"/>
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4585 </p>
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4586 <p>
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4587 <s xml:id="echoid-s2262" xml:space="preserve">Wenn nun mit Hülfe beyder Condenſatoren die Elek-<lb/>tricität 1000mal verſtärkt wird (welche Angabe gar nicht <lb/>übertrieben iſt), wie ſchwach muß dann die Elektricität <lb/>des unterſuchten Körpers ſeyn, und wie ſchwach diejenige, <lb/>welche durch das Reiben des Metalls mit der Hand er-<lb/>zeugt wird? </s>
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4588 <s xml:id="echoid-s2263" xml:space="preserve">Dieſe Elektricität wirkt nur mit Mühe aufs <lb/>Elektrometer, wenn ſie gleich durch beyde Condenſatoren <lb/>verſtärkt iſt; </s>
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4589 <s xml:id="echoid-s2264" xml:space="preserve">ſie iſt gerade nur hinreichend, die Ueberzeu-
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4590 <pb o="151" file="0171" n="171" rhead="Atmoſphäriſche Elektricität."/>
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4591 gung zu verſchaffen, daß ſich das Metall durch Reibe@ <lb/>mit der Hand elektriſiren laſſe.</s>
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4592 <s xml:id="echoid-s2265" xml:space="preserve"/>
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4593 </p>
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4594 <p>
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4595 <s xml:id="echoid-s2266" xml:space="preserve">Vor der Entdeckung des Condenſators und des ſo <lb/>empfindlichen Elektrometers des Herrn Cavallo waren <lb/>wir nicht im Stande, ſo ſchwache Elektricitäten zu bemer-<lb/>ken; </s>
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4596 <s xml:id="echoid-s2267" xml:space="preserve">da wir hingegen jetzt Grade der Elektricität beob-<lb/>achten können, welche ohne alle Vergleichung geringer <lb/>ſind, als die ſchwächſten, die ſich damals bemerken ließen.</s>
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4597 <s xml:id="echoid-s2268" xml:space="preserve"/>
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4598 </p>
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4599 </div>
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4600 <div xml:id="echoid-div218" type="section" level="1" n="211">
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4601 <head xml:id="echoid-head231" xml:space="preserve">Zwölftes Capitel.</head>
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4602 <head xml:id="echoid-head232" xml:space="preserve">Von der atmoſphäriſchen Elektricität.</head>
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4603 <p>
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4604 <s xml:id="echoid-s2269" xml:space="preserve">In Abſicht auf den Gegenſtand dieſes Capitels haben <lb/>wir das meiſte dem P. </s>
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4605 <s xml:id="echoid-s2270" xml:space="preserve">Beccaria zu danken, wel-<lb/>cher viele Jahre lang die verſchiedenen Abwechſelungen <lb/>der Elektricität der Atmoſphäre und ihre Verbindung mit <lb/>den übrigen Phänomenen der Witterung genau beobachtet <lb/>hat. </s>
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4606 <s xml:id="echoid-s2271" xml:space="preserve">Sein Apparatus war zu dieſer Abſicht ungemein <lb/>geſchickt, und übertrift bey weitem alle bisher bekannte <lb/>Anſtalten zu leichter und ungehinderter Beobachtung der <lb/>Luftelektricität. </s>
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4607 <s xml:id="echoid-s2272" xml:space="preserve">Da man anfänglich nicht glaubte, daß <lb/>die Elektricität mit allen Wirkungen der Natur ſo innig <lb/>verbunden ſey, als wir es jezt wiſſen, ſo iſt die Anzahl <lb/>der in dieſem Fache arbeitenden Naturforſcher noch nicht <lb/>groß geweſen; </s>
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4608 <s xml:id="echoid-s2273" xml:space="preserve">die vornehmſten derſelben ſind der P. </s>
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4609 <s xml:id="echoid-s2274" xml:space="preserve">Bec-<lb/>caria, Herr Ronayne und Herr Cavallo,</s>
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4610 </p>
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4611 <p>
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4612 <s xml:id="echoid-s2275" xml:space="preserve">Ich habe hier die Reſultate der Beobachtungen des <lb/>P. </s>
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4613 <s xml:id="echoid-s2276" xml:space="preserve">Beccaria in einen Auszug und eine gehörige Ord-<lb/>nung gebracht, und gelegentlich die Beobachtungen ande-<lb/>rer Gelehrten eingeſchaltet, um den Leſer mit den Haupt-<lb/>ſachen bekannt zu machen, und zu aufmerkſamer Unter-<lb/>ſuchung dieſes ſo wichtigen und feinen Gegenſtandes anzu-<lb/>locken; </s>
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4614 <s xml:id="echoid-s2277" xml:space="preserve">denn man kann nie von einem meteorologiſchen
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4615 <pb o="152" file="0172" n="172" rhead="Zwölftes Capitel."/>
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4616 Syſtem einige Gewißheit erwarten, wofern nicht dabey <lb/>die Wirkung der Elektricität, als einer der vornehmſten <lb/>Triebfedern, beſonders in Betrachtung gezogen wird.</s>
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4617 <s xml:id="echoid-s2278" xml:space="preserve"/>
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4618 </p>
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4619 <p>
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4620 <s xml:id="echoid-s2279" xml:space="preserve">Der Apparatus des P. </s>
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4621 <s xml:id="echoid-s2280" xml:space="preserve">Beccaria zu Unterſuchung <lb/>der Elektricität der Atmoſphäre beſtand aus einem 132 <lb/>Schuh langen eiſernen Drathe, den er den @xplorator <lb/>nennet. </s>
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4622 <s xml:id="echoid-s2281" xml:space="preserve">Das eine Ende deſſelben befeſtigte er an eine <lb/>über den Schorſtein hervorragende Stange; </s>
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4623 <s xml:id="echoid-s2282" xml:space="preserve">das andere <lb/>an den Gipfel eines Kirſchbaums. </s>
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4624 <s xml:id="echoid-s2283" xml:space="preserve">Die Enden des <lb/>Draths waren iſolirt und mit einem kleinen zinnernen <lb/>Knöpfchen verſehen. </s>
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4625 <s xml:id="echoid-s2284" xml:space="preserve">Ein andrer Drath ward von dem vori-<lb/>gen (durch eine dicke mit Siegellak überzogne Glasröhre) <lb/>ins Zimmer geführt; </s>
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4626 <s xml:id="echoid-s2285" xml:space="preserve">wodurch man beſtändig in Stand <lb/>geſetzt ward, den Zuſtand der Elektricität in dem Explo-<lb/>rator zu beobachten. </s>
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4627 <s xml:id="echoid-s2286" xml:space="preserve">Beccaria verband mit dieſem letz-<lb/>tern Drathe einen kleinen Streif Metall; </s>
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4628 <s xml:id="echoid-s2287" xml:space="preserve">an jeder Seite <lb/>deſſelben befand ſich eine Korkkugel von 1 Linie Durch-<lb/>meſſer; </s>
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4629 <s xml:id="echoid-s2288" xml:space="preserve">dieſe Kugeln waren an ſeidnen 16 Linien langen <lb/>Faden aufgehangen.</s>
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4630 <s xml:id="echoid-s2289" xml:space="preserve"/>
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4631 </p>
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4632 <p>
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4633 <s xml:id="echoid-s2290" xml:space="preserve">Bey heiterm Himmel iſt die Elektricität gemeinig-<lb/>lich ſo ſtark, daß die Kugeln ohngefähr 6 Linien von der <lb/>Metallplatte abſtehen; </s>
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4634 <s xml:id="echoid-s2291" xml:space="preserve">iſt ſie ſehr ſtark, ſo ſtehen ſie 15 <lb/>bis 20 Grad ab; </s>
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4635 <s xml:id="echoid-s2292" xml:space="preserve">iſt ſie ſchwach, ſo iſt die Divergenz ſehr <lb/>gering.</s>
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4636 <s xml:id="echoid-s2293" xml:space="preserve"/>
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4637 </p>
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4638 <p>
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4639 <s xml:id="echoid-s2294" xml:space="preserve">Bey heiterm Himmel braucht der Drath, wenn man <lb/>ihn berührt hat, eine Minute Zeit oder noch mehr, ehe er <lb/>wieder Zeichen einiger Elektricität von ſich giebt; </s>
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4640 <s xml:id="echoid-s2295" xml:space="preserve">ob er <lb/>gleich zu andern Zeiten ſchon in einer Sekunde wieder <lb/>elektriſtrt wird.</s>
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4641 <s xml:id="echoid-s2296" xml:space="preserve"/>
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4642 </p>
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4643 <p>
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4644 <s xml:id="echoid-s2297" xml:space="preserve">Die Elektricität iſt bey heiterm Himmel allezeit po-<lb/>ſitiv. </s>
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4645 <s xml:id="echoid-s2298" xml:space="preserve">Nur höchſt ſelten iſt ſie negativ, und alsdann <lb/>bringt ſie der Wind aus andern (vielleicht vom Beob-<lb/>achtungsorte ſehr entfernten) Gegenden der Atmoſphäre, <lb/>wo es zu derſelben Zeit Nebel, Schnee, Regen oder <lb/>Wolken giebt. </s>
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4646 <s xml:id="echoid-s2299" xml:space="preserve">Dieſen Satz beſtätiget die ganze Reihe <lb/>der von Beccatia gemachten Beobachtungen. </s>
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4647 <s xml:id="echoid-s2300" xml:space="preserve">Nur
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4648 <pb o="153" file="0173" n="173" rhead="Atmoſphäriſche Elektricität."/>
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4649 zwey oder dreymal hat er Beyſpiele vom Gegentheil ge-<lb/>funden.</s>
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4650 <s xml:id="echoid-s2301" xml:space="preserve"/>
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4651 </p>
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4652 <p>
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4653 <s xml:id="echoid-s2302" xml:space="preserve">Nach D. </s>
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4654 <s xml:id="echoid-s2303" xml:space="preserve">Franklin’s Beobachtungen ſind die Wol-<lb/>ken bisweilen negativ, welches gewiß ſehr richtig iſt; </s>
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4655 <s xml:id="echoid-s2304" xml:space="preserve">ſie <lb/>verſchlucken bisweilen aus und durch den Apparatus eine <lb/>große und vollgeladene Flaſche poſitiver Elektricität, von <lb/>welcher der Apparatus nicht den 100ſten Theil hätte anneh-<lb/>men und behalten können. </s>
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4656 <s xml:id="echoid-s2305" xml:space="preserve">Man kann ſich auch leicht <lb/>vorſtellen, wie eine ſtark geladene große poſitive Wolke <lb/>kleinere Wolken negativ machen könne.</s>
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4657 <s xml:id="echoid-s2306" xml:space="preserve"/>
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4658 </p>
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4659 <p>
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4660 <s xml:id="echoid-s2307" xml:space="preserve">Die Elektricität der Atmoſphäre ſteht mit dem Zu-<lb/>ſtande der Luft in Abſicht auf Feuchtigkeit und Trockenheit <lb/>in der genaueſten Verbindung, daß man alſo nothwendig <lb/>auf das Hygrometer Acht haben muß, wenn man über <lb/>die verſchiedenen Grade der Elektricität zu verſchiedenen <lb/>Zeiten ein gegründetes Urtheil fällen will. </s>
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4661 <s xml:id="echoid-s2308" xml:space="preserve">Das Hygro-<lb/>meter des Herrn Coventty von Papier wird hiebey die <lb/>beſten Dienſte thun; </s>
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4662 <s xml:id="echoid-s2309" xml:space="preserve">es iſt ſehr empfindlich, zieht die <lb/>Feuchtigkeit bald an ſich, theilt ſie auch leicht wieder mit; <lb/></s>
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4663 <s xml:id="echoid-s2310" xml:space="preserve">und läßt ſich mit andern Hygrometern eben dieſer Art ver-<lb/>gleichen. </s>
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4664 <s xml:id="echoid-s2311" xml:space="preserve">Auch iſt es nöthig, ein Thermometer neben <lb/>das Hygrometer zu ſtellen, um zu beſtimmen, wie viel <lb/>Feuchtigkeit die Luft bey einem jeden gegebnen Grade der <lb/>Wärme aufgelöſet enthalten könne; </s>
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4665 <s xml:id="echoid-s2312" xml:space="preserve">obgleich dieſe Abſicht <lb/>ſich noch beſſer möchte erreichen laſſen, wenn man genau <lb/>beobachtete, wie viel Feuchtigkeit zu verſchiedenen Zeiten <lb/>aus einer gegebnen Oberfläche ausdünſtet. </s>
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4666 <s xml:id="echoid-s2313" xml:space="preserve">Auch iſt zu <lb/>bemerken, daß die Dichtigkeit der Luft auf die Menge der <lb/>darinn enthaltenen Feuchtigkeit Einfluß hat.</s>
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4667 <s xml:id="echoid-s2314" xml:space="preserve"/>
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4668 </p>
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4669 <p>
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4670 <s xml:id="echoid-s2315" xml:space="preserve">Die Feuchtigkeit in der Luft iſt der beſtändige Leiter <lb/>der atmoſphäriſchen Elektricität bey heiterm Himmel; </s>
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4671 <s xml:id="echoid-s2316" xml:space="preserve">da-<lb/>her ſteht auch die Menge der Elektricität im Verhältniß <lb/>mit der Menge von Feuchtigkeit, welche den Explorator <lb/>umgiebt; </s>
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4672 <s xml:id="echoid-s2317" xml:space="preserve">bis deren endlich ſo viel wird, daß ſie die Iſoli-<lb/>rung des Draths und der Atmoſphäre unvollkommen <lb/>macht. </s>
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4673 <s xml:id="echoid-s2318" xml:space="preserve">Bey trockner Luft wird es oft über eine Minute
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4674 <pb o="154" file="0174" n="174" rhead="Zwölftes Capitel."/>
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4675 lang dauren, che die Kugeln, wenn der Drath berührt <lb/>worden iſt, wiederum einige Elektricität zeigen; </s>
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4676 <s xml:id="echoid-s2319" xml:space="preserve">da hin-<lb/>gegen bey feuchterer Luft kaum eine Sekunde vergangen <lb/>iſt, wenn die Kugeln ſchon wieder zwiſchen dem Finger <lb/>und der meſſingenen Platte, an welcher ſie hängen, ſchnell@ <lb/>Oſcillationen machen <anchor type="note" xlink:href="" symbol="*)"/>.</s>
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4677 <s xml:id="echoid-s2320" xml:space="preserve"/>
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4678 </p>
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4679 <p>
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4680 <s xml:id="echoid-s2321" xml:space="preserve">Wenn ſich der Himmel aufklärt, iſt die Elektricität <lb/>allezeit poſitiv. </s>
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4681 <s xml:id="echoid-s2322" xml:space="preserve">Geſchieht dies plötzlich, und wird die <lb/>Luft ſchnell trocken, ſo ſteigt die Elektricität auf einen ho-<lb/>hen Grad, und giebt häufige Gelegenheit, die Beobach-<lb/>tungen zu wiederholen. </s>
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4682 <s xml:id="echoid-s2323" xml:space="preserve">Bisweilen hält die durch Auf-<lb/>flärung des Himmels verurſachte Elektricität eine lange <lb/>Zeit mit gleicher Intenſität an; </s>
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4683 <s xml:id="echoid-s2324" xml:space="preserve">fängt auch wohl nach ei-<lb/>niger Unterbrechung von neuem an, ſtark zu werden. <lb/></s>
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4684 <s xml:id="echoid-s2325" xml:space="preserve">Dies ſcheint von derjenigen Elektrieität herzurühren, wel-<lb/>che der Wind aus großen Entfernungen herbey führt.</s>
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4685 <s xml:id="echoid-s2326" xml:space="preserve"/>
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4686 </p>
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4687 <p>
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4688 <s xml:id="echoid-s2327" xml:space="preserve">P. </s>
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4689 <s xml:id="echoid-s2328" xml:space="preserve">Beccatia ſagt, wenn er beobachtet habe, daß <lb/>die über ſeinem Scheitel befindlichen dicken niedrigen Wol-<lb/>ken ſich zu zertheilen, und die darüber ſtehenden dünnern <lb/>und gleichförmigern dünner zu werden angefangen hätten, <lb/>daß der Regen aufgehört, und das Elektrometer poſitive <lb/>Eletricität gezeigt hätte, ſo habe er ſeinen Beobachtungen <lb/>allezeit beygeſchrieben: </s>
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4690 <s xml:id="echoid-s2329" xml:space="preserve">Zuverläßiger Uebergang zu <lb/>heiterm wetter.</s>
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4691 <s xml:id="echoid-s2330" xml:space="preserve"/>
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4692 </p>
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4693 <p>
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4694 <s xml:id="echoid-s2331" xml:space="preserve">Starke poſitive Elektricität nach dem Regen iſt ein <lb/>Zeichen, daß die gute Witterung einige Tage lang anhal-<lb/>ten werde. </s>
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4695 <s xml:id="echoid-s2332" xml:space="preserve">Iſt die Elektricität ſchwach, ſo zeigt dies an, <lb/>
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4696 <anchor type="note" xlink:label="note-0174-01a" xlink:href="note-0174-01"/>
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4697 <pb o="155" file="0175" n="175" rhead="Atmoſphäriſche Elektricität."/>
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4698 das gute Wetter werde nicht den ganzen Tag über anhal-<lb/>ten, es werde bald trüb werden und regnen.</s>
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4699 <s xml:id="echoid-s2333" xml:space="preserve"/>
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4700 </p>
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4701 <div xml:id="echoid-div218" type="float" level="2" n="1">
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4702 <note symbol="*" position="foot" xlink:label="note-0174-01" xlink:href="note-0174-01a" xml:space="preserve">Bey heiterm Himmel muß man die Beobachtungen übet <lb/>die Elektricität der Atmoſphäre ſehr oft wiederholen, um <lb/>die Geſchwindigkeit zu beobachten, mit welcher die Elek-<lb/>tricität, wenn man ſie aufgehoben hat, wieder ſteigt; <lb/>welches der P. Beccaria gemeiniglich nach der Anzahl <lb/>von Sekunden beſtimmt, welche verfließen mußten, ehe <lb/>die Kugeln wieder ihre Elektricität zeigten.</note>
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4703 </div>
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4704 <p>
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4705 <s xml:id="echoid-s2334" xml:space="preserve">Wenn ſich der Himmel über dem Orte der Beob-<lb/>achtung trübet, und eine hohe Wolke entſteht, welche keine <lb/>niedrige Wolken unter ſich hat, auch kein Theil einer ſchon <lb/>anderwärts regnenden Wolke iſt, ſo bemerkt man entwe-<lb/>der gar keine, oder eine poſitive Elektricität.</s>
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4706 <s xml:id="echoid-s2335" xml:space="preserve"/>
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4707 </p>
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4708 <p>
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4709 <s xml:id="echoid-s2336" xml:space="preserve">Entſtehen die Wolken in Geſtalt wollener Flocken, <lb/>und bewegen ſich erſt näher an einander, und dann aus <lb/>einander; </s>
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4710 <s xml:id="echoid-s2337" xml:space="preserve">oder liegt die entſtehende große Wolke ſehr hoch, <lb/>und ſtreckt ſich dann niederwärts, wie ein herabſinkender <lb/>Rauch, ſo zeigt ſich gemeiniglich poſitive Elektricität, de-<lb/>ren Stärke ſich verhält, wie die Geſchwindigkeit, mit <lb/>welcher die Wolke entſteht; </s>
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4711 <s xml:id="echoid-s2338" xml:space="preserve">und man kann aus derſelben <lb/>die Menge und Geſchwindigkeit des darauf folgenden Re-<lb/>gens oder Schnees in voraus abnehmen.</s>
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4712 <s xml:id="echoid-s2339" xml:space="preserve"/>
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4713 </p>
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4714 <p>
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4715 <s xml:id="echoid-s2340" xml:space="preserve">Bildet ſich eine dünne, ebne und weit ausgebreitete <lb/>Wolke, welche den Himmel trübt, und eine graue Farbe <lb/>zeigt, ſo bemerkt man eine ſtarke und ſich ſchnell wieder <lb/>erſetzende poſitive Elektricität; </s>
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4716 <s xml:id="echoid-s2341" xml:space="preserve">je langſamer aber die Ent-<lb/>ſtehung der Wolke erfolgt, deſto ſchwächer wird dieſe Elek-<lb/>tricität; </s>
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4717 <s xml:id="echoid-s2342" xml:space="preserve">bisweilen verſchwindet ſie gänzlich. </s>
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4718 <s xml:id="echoid-s2343" xml:space="preserve">Entſteht <lb/>hingegen die dünne ausgebreitete Wolke nach und nach <lb/>aus kleinen Wolken, die ſich wie Flocken, beſtändig daran <lb/>hängen, und einander abſtoßen, ſo hält die poſitive Elek-<lb/>tricität gemeiniglich an.</s>
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4719 <s xml:id="echoid-s2344" xml:space="preserve"/>
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4720 </p>
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4721 <p>
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4722 <s xml:id="echoid-s2345" xml:space="preserve">Niedrige und dicke Nebel (beſonders, wenn die Lufe <lb/>um den Ort, wo ſie aufſteigen, von Feuchtigkeit frey iſt) <lb/>geben dem Explorator eine Elektricität, welche zu@wieder-<lb/>holtenmalen kleine Funken giebt, und eine Divergenz der <lb/>Kugeln von 20° — 25° oder wohl 30° hervorbringt. </s>
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4723 <s xml:id="echoid-s2346" xml:space="preserve">Ent-<lb/>ſteht der Nebel ſchnell, und bleibt er eine Zeit lang in der <lb/>Gegend des Explorators, ſo verfchwindet dieſe Elektrici-<lb/>tät bald; </s>
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4724 <s xml:id="echoid-s2347" xml:space="preserve">fährt er aber fort, zu ſteigen, und tritt ein@ <lb/>neue Wolke an die Stelle der vorigen, ſo elektriſiret die-
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4725 <pb o="156" file="0176" n="176" rhead="Zwölftes Capitel."/>
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4726 ſelbe den Drath von neuem, obgleich nicht ſo ſtark, als <lb/>vorher. </s>
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4727 <s xml:id="echoid-s2348" xml:space="preserve">Läßt man Racketen durch ſolche dicke, niedrige <lb/>und anhaltende Nebel gehen, ſo erhält man oft Zeichen <lb/>einer Elektricität. </s>
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4728 <s xml:id="echoid-s2349" xml:space="preserve">Der P. </s>
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4729 <s xml:id="echoid-s2350" xml:space="preserve">Beccaria hat unter den <lb/>oben angeführten Umſtänden niemals ein Beyſpiel von <lb/>negativer Elektricität gefunden; </s>
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4730 <s xml:id="echoid-s2351" xml:space="preserve">außer vielleicht ein ein-<lb/>ziges mal, da er eine Rackete mit einer Schnur durch <lb/>einen niedrigen dicken Nebel gehen ließ: </s>
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4731 <s xml:id="echoid-s2352" xml:space="preserve">ob er gleich nach-<lb/>her ſehr gegründete Urſachen erhielt, zu glauben, daß er <lb/>ſich in Abſicht auf den an der Spitze bemerkten Stern <lb/>geirrt habe.</s>
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4732 <s xml:id="echoid-s2353" xml:space="preserve"/>
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4733 </p>
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4734 <p>
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4735 <s xml:id="echoid-s2354" xml:space="preserve">Herr Ronayne fand die Luft in Irland beym Ne-<lb/>bel, auch beym Reif, gemeiniglich elektriſirt, und das <lb/>ſo wohl bey Tag als bey Nacht, vorzüglich aber im Win-<lb/>ter; </s>
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4736 <s xml:id="echoid-s2355" xml:space="preserve">im Sommer ſelten, und nur von poſitiven Wolken, <lb/>oder kalten Nebeln. </s>
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4737 <s xml:id="echoid-s2356" xml:space="preserve">Die Elektricität der Luft beym Reif <lb/>oder Nebel iſt allezeit poſitiv. </s>
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4738 <s xml:id="echoid-s2357" xml:space="preserve">Auch hat er beym Ueber-<lb/>gange einer Wolke oft Abwechſelungen von negativer und <lb/>poſitiver Elektricität beobachtet.</s>
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4739 <s xml:id="echoid-s2358" xml:space="preserve"/>
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4740 </p>
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4741 <p>
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4742 <s xml:id="echoid-s2359" xml:space="preserve">Die meiſten Nebel haben einen Geruch, der dem <lb/>Geruche einer geriebenen Glasröhre ſehr ähnlich iſt.</s>
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4743 <s xml:id="echoid-s2360" xml:space="preserve"/>
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4744 </p>
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4745 <p>
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4746 <s xml:id="echoid-s2361" xml:space="preserve">Herr Henly hat gezeigt, daß die Nebel bey oder <lb/>gleich nach einem Froſte ſtärker elektriſirt ſind, als zu an-<lb/>derer Zeit, und daß ihre Elektricität oft, gleich nach ihrer <lb/>Entſtehung, am ſtärkſten iſt.</s>
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4747 <s xml:id="echoid-s2362" xml:space="preserve"/>
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diff changeset
4748 </p>
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4749 <p>
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4750 <s xml:id="echoid-s2363" xml:space="preserve">Wenn ein dicker Nebel aufſteigt, und zugleich die <lb/>Luft ſcharf und kalt iſt, ſo iſt der Nebel ſtark poſitiv elek-<lb/>triſirt.</s>
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4751 <s xml:id="echoid-s2364" xml:space="preserve"/>
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4752 </p>
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4753 <p>
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4754 <s xml:id="echoid-s2365" xml:space="preserve">Den Regen hält er nicht für eine unmittelbare Urſa-<lb/>che der Luftelektricität, aber er vermuthet, daß er eine <lb/>entfernte Folge derſelben ſey. </s>
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4755 <s xml:id="echoid-s2366" xml:space="preserve">Gemeiniglich fand er, daß, <lb/>wenn die Luft ſehr ſtark elektriſirt war, zwey oder drey <lb/>Tage darauf Regen oder andere üble Witterung erfolgte.</s>
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4756 <s xml:id="echoid-s2367" xml:space="preserve"/>
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4757 </p>
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4758 <p>
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4759 <s xml:id="echoid-s2368" xml:space="preserve">Wenn bey heiterm Himmel eine niedrige Wolke, die <lb/>ſich langſam bewegt, und von andern Wolken entfernt iſt, <lb/>über den Drath geht, ſo wird die poſitive Elektricität ge-
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4760 <pb o="157" file="0177" n="177" rhead="Atmoſphäriſche Elektricität."/>
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4761 meiniglich ſehr ſchwach, jedoch nicht negativ; </s>
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4762 <s xml:id="echoid-s2369" xml:space="preserve">ſobald die <lb/>Wolke vorüber iſt, kömmt ſie auf den vorigen Grad zu-<lb/>rück. </s>
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4763 <s xml:id="echoid-s2370" xml:space="preserve">Wenn viele weißliche Wolken, wie Flocken, über <lb/>dem Drathe ſtehen, die ſich bald mit einander vereinigen, <lb/>bald wieder von einander entfernen, und zuſammen ein <lb/>weit ausgebreitetes Ganzes ausmachen, ſo nimmt die po-<lb/>ſitive Elektricität gemeiniglich zu. </s>
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4764 <s xml:id="echoid-s2371" xml:space="preserve">In allen angeführten <lb/>Fällen geht die poſitive Elektricität niemals in die negative <lb/>über.</s>
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4765 <s xml:id="echoid-s2372" xml:space="preserve"/>
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4766 </p>
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4767 <p>
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4768 <s xml:id="echoid-s2373" xml:space="preserve">Wolken, welche ſich fortbewegen, ſchwächen die Elek-<lb/>tricität des Explorators; </s>
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4769 <s xml:id="echoid-s2374" xml:space="preserve">doch ſcheinen auch diejenigen, <lb/>welche niedrig ſtehen, dieſe Wirkung hervorzubringen.</s>
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4770 <s xml:id="echoid-s2375" xml:space="preserve"/>
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4771 </p>
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4772 </div>
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4773 <div xml:id="echoid-div220" type="section" level="1" n="212">
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4774 <head xml:id="echoid-head233" xml:space="preserve">Von der täglichen atmoſphäriſchen <lb/>Elek@ricität.</head>
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4775 <p>
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4776 <s xml:id="echoid-s2376" xml:space="preserve">Des Morgens, wenn das Hygrometer eben ſo viel <lb/>oder etwas weniger Trockenheit zeiget, als Tages vorher, <lb/>entſteht vor Sonnenaufgang einige Elektricität. </s>
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4777 <s xml:id="echoid-s2377" xml:space="preserve">Sie zeigt <lb/>ſich durch Zuſammengehen, Anhängen oder auch durch <lb/>einige Divergenz der Kugeln, und iſt deſto größer, je <lb/>trockner die Luft, und je geringer der Unterſchied ihres <lb/>Zuſtandes von dem am vorigen Tage iſt. </s>
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4778 <s xml:id="echoid-s2378" xml:space="preserve">Iſt die Luft <lb/>nicht trocken genug, ſo nimmt man keine Elektricität vot <lb/>oder kurz nach Sonnenaufgang wahr. </s>
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4779 <s xml:id="echoid-s2379" xml:space="preserve">Da die Luft ge-<lb/>wöhnlicher Weiſe die Nacht über feucht iſt, ſo kann man <lb/>dieſe Elektricität bey Sonnenaufgang nur ſelten bemerken. <lb/></s>
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4780 <s xml:id="echoid-s2380" xml:space="preserve">P. </s>
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4781 <s xml:id="echoid-s2381" xml:space="preserve">Beccaria fand bey dreymonatlichen Beobachtungen <lb/>nur an achtzehn Morgen Elektricität vor Sonnenaufgang; </s>
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4782 <s xml:id="echoid-s2382" xml:space="preserve"><lb/>und aus der ganzen Reihe ſeiner zahlreichen Beobachtun-<lb/>gen erhellet, daß dieſe Erſcheinung im Winter häufiger <lb/>vorkomme, als im Sommer, beſonders wenn man den <lb/>Apparatus vor dem Reif und aller Feuchtigkeit bewahret.</s>
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4783 <s xml:id="echoid-s2383" xml:space="preserve"/>
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4784 </p>
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4785 <p>
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4786 <s xml:id="echoid-s2384" xml:space="preserve">Des Vormittags wird die Elektricität nach und nach <lb/>ſtärker, je höher die Sonne ſteigt, ſie mag nun vor Son-<lb/>nenaufgang, oder erſt nachher, ſichtbar geworden ſeyn.</s>
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4787 <s xml:id="echoid-s2385" xml:space="preserve">
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4788 <pb o="158" file="0178" n="178" rhead="Zwölftes Capitel."/>
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4789 Dieſes ſtufenweiſe Zunehmen der vormittäglichen Elektri-<lb/>cität fängt früher an, wenn das Hygrometer nach Son-<lb/>nenaufgang fortfährt, größere Grade der zunehmenden <lb/>Trockenheit zu zeigen. </s>
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4790 <s xml:id="echoid-s2386" xml:space="preserve">Die Stärke und das Wieder-<lb/>kommen der Elektricität (wenn man ſie durch Berüh-<lb/>rung des Draths weggenommen hat) bleibt an heitern <lb/>Tagen, an welche@ kein heftiger Wind wehet, und das <lb/>Hygrometer an der höchſten Stelle, die es erreichet, ruhig <lb/>ſtehen bleibt, ſo lange einerley, bis die Sonne bald unter-<lb/>gehen will. </s>
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4791 <s xml:id="echoid-s2387" xml:space="preserve">Kömmt die Sonne ihrem Untergange nahe, <lb/>ſo nimmt dieſe tägliche Elektricität deſto mehr ab, je mehr <lb/>Feuchtigkeit das Hygrometer in ſich zieht.</s>
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4792 <s xml:id="echoid-s2388" xml:space="preserve"/>
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4793 </p>
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4794 <p>
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4795 <s xml:id="echoid-s2389" xml:space="preserve">Wenn gleich das Hygrometer an verſchiedenen Ta-<lb/>gen um 12 Uhr gleiche Grade der Trockenheit zeigt, ſo <lb/>erſcheint doch die Elektricität nach der Berührung des <lb/>Draths immer an einem Tage früher wieder, als am an-<lb/>dern; </s>
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4796 <s xml:id="echoid-s2390" xml:space="preserve">und dieß ſteht großentheils mit der Wärme im Ver-<lb/>hältniß. </s>
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4797 <s xml:id="echoid-s2391" xml:space="preserve">An ſolchen Tagen fängt auch die Elektricität des <lb/>Morgens früher an, und hört des Abends früher auf.</s>
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4798 <s xml:id="echoid-s2392" xml:space="preserve"/>
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4799 </p>
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4800 <p>
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4801 <s xml:id="echoid-s2393" xml:space="preserve">Das Reiben der Winde an der Erdfläche iſt nicht <lb/>die Urſache der atmoſphäriſchen Elektricität. </s>
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4802 <s xml:id="echoid-s2394" xml:space="preserve">Heftige <lb/>Winde ſchwächen die Elektricität bey heiterm Himmel. <lb/></s>
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4803 <s xml:id="echoid-s2395" xml:space="preserve">Sind ſie feucht, ſo ſchwächen ſie ihre Intenſität deſto <lb/>ſtärker. </s>
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4804 <s xml:id="echoid-s2396" xml:space="preserve">je mehr ſie die vollkommene Iſolirung des Draths <lb/>und der Atmoſphäre vermindern.</s>
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4805 <s xml:id="echoid-s2397" xml:space="preserve"/>
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4806 </p>
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4807 </div>
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4808 <div xml:id="echoid-div221" type="section" level="1" n="213">
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4809 <head xml:id="echoid-head234" xml:space="preserve">Von der Elektricität beym Abendthaue.</head>
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4810 <p>
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4811 <s xml:id="echoid-s2398" xml:space="preserve">In den kühlern Jahrszeiten entſteht, wenn der Him-<lb/>mel heiter iſt, ein wenig Wind wehet und die Trockenheit <lb/>ſtark zunimmt, nach Sonnenuntergang mit Anfang des <lb/>Thaues eine Elektricität von beträchtlicher Stärke. </s>
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4812 <s xml:id="echoid-s2399" xml:space="preserve">Dieſe <lb/>Elektricität kömmt ſogar weit ſchneller wieder, als die <lb/>tägliche ſelbſt, und vergeht ſehr langſam.</s>
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4813 <s xml:id="echoid-s2400" xml:space="preserve"/>
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4814 </p>
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4815 <p>
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4816 <s xml:id="echoid-s2401" xml:space="preserve">In gemäßigten oder warmen Jahrszeiten, zeigt ſich <lb/>unter eben den Umſtänden eine der vorigen völlig ähnliche
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4817 <pb o="159" file="0179" n="179" rhead="Atmoſphäriſche Elektricität."/>
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4818 Elektricität ſogleich mit Sonnenuntergange; </s>
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4819 <s xml:id="echoid-s2402" xml:space="preserve">nur iſt ihre <lb/>Intenſität nicht ſo beſtändig; </s>
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4820 <s xml:id="echoid-s2403" xml:space="preserve">ſie fängt mit größerer<unsure/> <lb/>Geſchwindigkeit an, vergeht aber auch früher.</s>
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4821 <s xml:id="echoid-s2404" xml:space="preserve"/>
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4822 </p>
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4823 <p>
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4824 <s xml:id="echoid-s2405" xml:space="preserve">Iſt unter obigen Umſtänden die Trockenheit der Luft, <lb/>im Durchſchnitt genommen, geringer, ſo iſt die Abends <lb/>mit dem Thaue entſtehende Elektricität deſto ſchwächer, <lb/>je mehr ſie die Vollkommenheit der Iſolirung des Draths <lb/>und der Atmoſphäre vermindert; </s>
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4825 <s xml:id="echoid-s2406" xml:space="preserve">ſie kömmt aber, wenn <lb/>man den Drath berührt hat, deſto ſchneller wieder, je <lb/>größer die Menge des Thaues iſt.</s>
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4826 <s xml:id="echoid-s2407" xml:space="preserve"/>
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4827 </p>
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4828 <p>
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4829 <s xml:id="echoid-s2408" xml:space="preserve">Die Elektricität des Thaues ſcheint von der Meng@ <lb/>deſſelben abzuhängen, und bey ihren verſchiedenen Ver-<lb/>änderungen eben denjenigen Verhältniſſen zu folgen, welche <lb/>zwiſchen der Elektricität des ſtillen und ſanſten Regens, und <lb/>der ſtürmiſchen Platzregen ſtatt findet; </s>
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4830 <s xml:id="echoid-s2409" xml:space="preserve">auch verändert ſie <lb/>ſich nach den Jahrszeiten.</s>
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4831 <s xml:id="echoid-s2410" xml:space="preserve"/>
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4832 </p>
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4833 <p>
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4834 <s xml:id="echoid-s2411" xml:space="preserve">So wie der Regen, die Platzregen, das Nordlich@ <lb/>und das Zodiakallicht ſtets einige Tage nach einander von <lb/>eben denſelben charakteriſtiſchen Umſtänden begleitet zu er-<lb/>ſcheinen pflegen, ſo ſucht ſich auch die Elektricität des <lb/>Thaues einige Abende nach einander mit eben denſelben <lb/>Charakteren zu erhalten.</s>
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4835 <s xml:id="echoid-s2412" xml:space="preserve"/>
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4836 </p>
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4837 </div>
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4838 <div xml:id="echoid-div222" type="section" level="1" n="214">
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4839 <head xml:id="echoid-head235" xml:space="preserve">180. Verſuch.</head>
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4840 <p>
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4841 <s xml:id="echoid-s2413" xml:space="preserve">Man elektriſire die Luft, d. </s>
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4842 <s xml:id="echoid-s2414" xml:space="preserve">i. </s>
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4843 <s xml:id="echoid-s2415" xml:space="preserve">die in derſelben ſchwe-<lb/>bende Feuchtigkeit und andere Dämpfe, in einem wohl <lb/>verwahrten Zimmer, und erhebe eine Flaſche, welche man <lb/>mit kälterm Waſſer, als die Luft im Zimmer iſt, gefüllt, <lb/>und in einer gläſernen Röhre iſolirt hat, ſehr hoch in die-<lb/>ſem Zimmer. </s>
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4844 <s xml:id="echoid-s2416" xml:space="preserve">Die Iſolirung des Glaſes muß man mit <lb/>warmen leinenen Tüchern zu unterhalten ſuchen. </s>
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4845 <s xml:id="echoid-s2417" xml:space="preserve">Die <lb/>elektriſchen Phänomene zweyer an der Flaſche hängenden <lb/>Fäden werden die Erſcheinungen der Elektricität des Thau-<lb/>es ſehr genau darſtellen. </s>
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4846 <s xml:id="echoid-s2418" xml:space="preserve">Hieraus werden ſich die verſchie-
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4847 <pb o="160" file="0180" n="180" rhead="Zwdlftes Capitel."/>
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4848 denen Arten an den Tag legen, auf welche dieſe Elektrici-<lb/>tät entſteht, je nachdem die elektriſirten Dämpfe im Zim-<lb/>mer dünner oder dichter ſind, nachdem der Unterſchied <lb/>zwiſchen der Wärme der Luft im Zimmer und des Waſſers <lb/>in der Flaſche größer oder geringer, und die Iſolirung der <lb/>Flaſche mehr oder weniger vollkommen iſt.</s>
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4849 <s xml:id="echoid-s2419" xml:space="preserve"/>
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4850 </p>
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4851 <p>
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4852 <s xml:id="echoid-s2420" xml:space="preserve">Herr Ronayne hat bemerkt, daß bey Gewittern <lb/>die Blitze ſchnelle Veränderungen bewirken. </s>
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4853 <s xml:id="echoid-s2421" xml:space="preserve">Oft wird da-<lb/>durch die Elektricität weiter verbreitet, bisweilen vermin-<lb/>dert; </s>
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4854 <s xml:id="echoid-s2422" xml:space="preserve">bald verſtärkt, bald ſogar in die entgegengeſetzte <lb/>verwandlet; </s>
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4855 <s xml:id="echoid-s2423" xml:space="preserve">bisweilen kömmt ſie, wenn vorher gar keine <lb/>da war, mit einem Blitze plötzlich zum Vorſchein. </s>
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4856 <s xml:id="echoid-s2424" xml:space="preserve">Eine <lb/>große Gewitterwolke, welche den ganzen Himmel verdun-<lb/>kelt, bringt nicht ſoviel Elektricität hervor, als ein Theil <lb/>von ihr, oder ein gewöhnlicher Schauer; </s>
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4857 <s xml:id="echoid-s2425" xml:space="preserve">auch geht ein <lb/>Gewitter nicht der regelmäßigen Richtung des Windes <lb/>nach, ſondern ſchief und im Zikzak, d. </s>
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4858 <s xml:id="echoid-s2426" xml:space="preserve">i. </s>
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4859 <s xml:id="echoid-s2427" xml:space="preserve">es regnet an Or-<lb/>ten, wo das Gewitter gar nicht hinkommen ſollte.</s>
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4860 <s xml:id="echoid-s2428" xml:space="preserve"/>
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4861 </p>
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4862 </div>
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4863 <div xml:id="echoid-div223" type="section" level="1" n="215">
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4864 <head xml:id="echoid-head236" xml:space="preserve">Verſuche und Beobachtungen über die atmoſphäri-<lb/>ſche Elektricität, von Herrn Cavallo.</head>
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4865 <p>
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4866 <s xml:id="echoid-s2429" xml:space="preserve">Dieſe ſind größtentheils mit dem elektriſchen Dra-<lb/>chen angeſtellt, welcher die Elektricität aus der Luft zu je-<lb/>der Zeit aufſammlet. </s>
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4867 <s xml:id="echoid-s2430" xml:space="preserve">Das Vermögen dieſes Werkzeugs <lb/>kömmt auf die Schnur deſſelben an. </s>
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4868 <s xml:id="echoid-s2431" xml:space="preserve">Die beſte Methode, <lb/>dieſe Schnur zu verfertigen, iſt dieſe, daß man zween <lb/>dünne hänfene Bindfaden mit einem Kupferfaden, der-<lb/>gleichen zu unächten Stickereyen gebraucht werden, zu-<lb/>ſammendrehet: </s>
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4869 <s xml:id="echoid-s2432" xml:space="preserve">ein gemeiner Drache, wie die, womit die <lb/>Knaben ſpielen, mit dieſer Schnur, thut eben ſo gute <lb/>Dienſte, als irgend ein anderer. </s>
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4870 <s xml:id="echoid-s2433" xml:space="preserve">Wenn Herr Cavallo <lb/>einen auf dieſe Art eingerichteten Drachen ſteigen ließ, ſo <lb/>fand er allezeit an der Schnur Merkmale der Elektricität, <lb/>nur ein einzigesmal ausgenommen, wobey das Wettet <lb/>warm und der Wind ſo ſchwach war, daß er den Drachen
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4871 <pb o="161" file="0181" n="181" rhead="Atmoſphäriſche Elektricität."/>
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4872 nur mit Mühe zum Steigen brachte, und kaum einige <lb/>Minuten lang in der Höhe erhalten konnte: </s>
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4873 <s xml:id="echoid-s2434" xml:space="preserve">als hernach <lb/>der Wind ſtärker ward, erhielt er, wie gewöhnlich, eine <lb/>ſtarke poſitive Elektricität.</s>
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4874 <s xml:id="echoid-s2435" xml:space="preserve"/>
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4875 </p>
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4876 <p>
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4877 <s xml:id="echoid-s2436" xml:space="preserve">Stieg der Drache zu einer Zeit, da wegen der <lb/>großen Menge der Elektricität einige Gefahr zu befürchten <lb/>war, ſo band Herr Cavallo an die Schnur das eine Ende <lb/>einer Kette, ließ das andere auf den Boden fallen, und <lb/>ſtellte ſich auf ein iſolirendes Stativ. </s>
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4878 <s xml:id="echoid-s2437" xml:space="preserve">Den Fall ausge-<lb/>nommen, da man den Drachen bey einem Gewitter ſtei-<lb/>gen läßt, läuft der Operator nicht ſehr Gefahr, einen <lb/>Schlag zu bekommen. </s>
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4879 <s xml:id="echoid-s2438" xml:space="preserve">Ob er gleich den Drachen hun-<lb/>dertmal ohne die geringſte Vorſicht ſteigen ließ, bekam <lb/>er doch nur höchſt ſelten einige ſchwache Schläge in die <lb/>Arme. </s>
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4880 <s xml:id="echoid-s2439" xml:space="preserve">Nur iſt nicht rathſam, ihn ſteigen zu laſſen, wenn <lb/>Gewitterwolken über dem Scheitel ſtehen; </s>
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4881 <s xml:id="echoid-s2440" xml:space="preserve">dies iſt aber <lb/>auch nicht nöthig, da man alsdann andere Mittel hat, <lb/>die Elektricität zu beobachten. </s>
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4882 <s xml:id="echoid-s2441" xml:space="preserve">Oft zog er, wenn der <lb/>Drache ſtieg, die Schnur durch ein Fenſter ins Zimmer, <lb/>und befeſtigte ſie mit einer andern ſtarken ſeidnen Schnur <lb/>an einen ſchweren Stuhl im Zimmer. </s>
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4883 <s xml:id="echoid-s2442" xml:space="preserve">In Fig. </s>
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4884 <s xml:id="echoid-s2443" xml:space="preserve">78 ſtellr <lb/>A B einen Theil der ins Zimmer gezogenen Schnur des <lb/>Drachen, C die ſeidne Schnur, D E einen kleinen Conductor <lb/>vor, der durch einen dünnen Drath mit der Schnur des <lb/>Drachen verbunden iſt; </s>
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4885 <s xml:id="echoid-s2444" xml:space="preserve">F iſt ein Ouadrantenelektrometer <lb/>auf einem iſolirenden Stativ neben dem Conductor ge-<lb/>ſtellt; </s>
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4886 <s xml:id="echoid-s2445" xml:space="preserve">G eine etwa 18 Zoll lange Glasröhre, gn ein in <lb/>dieſe Glasröhre gekütteter meſſingener Drath mit einem <lb/>Knopfe. </s>
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4887 <s xml:id="echoid-s2446" xml:space="preserve">Man kann hiedurch die Beſchaffenheit der Elek-<lb/>tricität ſehr leicht beſtimmen, wenn man nicht ſicher nahe <lb/>an die Schnur kommen darf. </s>
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4888 <s xml:id="echoid-s2447" xml:space="preserve">Man berührt in dieſer Ab-<lb/>ſicht die Schnur mit dem Knopfe des Draths, welcher ſo-<lb/>viel Elektricität aus ihr in ſich nimmt, daß man ihre Be-<lb/>ſchaffenheit entweder durch das Anziehen und Abſtoßen <lb/>leichter Kügelchen, oder durch die Erſcheinungen des <lb/>elektriſchen Lichts unterſuchen kann. </s>
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4889 <s xml:id="echoid-s2448" xml:space="preserve">Man kann ſie auch
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4890 <pb o="162" file="0182" n="182" rhead="Zwölftes Capitel."/>
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4891 vermittelſt einer leidner Flaſche beſtimmen, welche @o ein-<lb/>gerichtet iſt, daß ſie die Ladung eine ſehr lange Zeit hält; <lb/></s>
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4892 <s xml:id="echoid-s2449" xml:space="preserve">in dieſem Falle braucht man den Drachen nicht länger in <lb/>der Luft zu laſſen, als es nöthig iſt, um die Flaſche zu <lb/>laden, welche dann die Beſchaffenheit der Elektricität auch <lb/>noch nach Verlauf einiger Tage zeigen wird.</s>
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4893 <s xml:id="echoid-s2450" xml:space="preserve"/>
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4894 </p>
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4895 <p>
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4896 <s xml:id="echoid-s2451" xml:space="preserve">Wenn man von einer geladenen Flaſche alles dasje-<lb/>nige, was ſie entladen könnte, ſorgfältig abhält, ſo wird <lb/>ſie ihre Ladung eine lange Zeit behalten. </s>
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4897 <s xml:id="echoid-s2452" xml:space="preserve">Auf dieſem <lb/>Grundſatze beruhet die Einrichtung der erwähnten Flaſche. <lb/></s>
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4898 <s xml:id="echoid-s2453" xml:space="preserve">Sie iſt auf die gewöhnliche Art belegt: </s>
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4899 <s xml:id="echoid-s2454" xml:space="preserve">der unbelegte Theil <lb/>des Glaſes aber iſt mit Siegellak oder ſonſt mit Firniß <lb/>überzogen. </s>
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4900 <s xml:id="echoid-s2455" xml:space="preserve">In den Hals dieſer Flaſche iſt eine an beyden <lb/>Enden offene Glasröhre eingeküttet, an deren unterm Ende <lb/>ein Stück Stanniol bis an die innere Belegung herüber-<lb/>geht. </s>
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4901 <s xml:id="echoid-s2456" xml:space="preserve">In dieſe Glasröhre geht ein Drath mit einem <lb/>Knopfe, an welchem ſich ein gläſerner Handgriff befindet; </s>
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4902 <s xml:id="echoid-s2457" xml:space="preserve"><lb/>der Drath iſt ſo lang, daß er den mit der innern Seite <lb/>verbundenen Stanniol berühret. </s>
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4903 <s xml:id="echoid-s2458" xml:space="preserve">Man lade die Flaſche, <lb/>wie gewöhnlich, und ziehe dann vermittelſt des gläſernen <lb/>Handgrifs den Drath aus der Glasröhre, welches man <lb/>thun kann, ohne die Flaſche zu entladen. </s>
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4904 <s xml:id="echoid-s2459" xml:space="preserve">Da in dieſem <lb/>Zuſtande die elektriſche Materie nicht leicht herauskann, ſo <lb/>bleibt eine ſolche Flaſche viele Wochen lang geladen.</s>
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4905 <s xml:id="echoid-s2460" xml:space="preserve"/>
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4906 </p>
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4907 <p>
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4908 <s xml:id="echoid-s2461" xml:space="preserve">Fig. </s>
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4909 <s xml:id="echoid-s2462" xml:space="preserve">80 iſt ein ſehr einfaches, ebenfalls von Herrn <lb/>Cavallo erfundenes Inſtrument zu Verſuchen über die <lb/>Elektricität der Atmoſphäre, welches in verſchiedenen <lb/>Rückſichten das beſte zu dieſer Abſicht zu ſeyn ſcheinet. <lb/></s>
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4910 <s xml:id="echoid-s2463" xml:space="preserve">A B iſt eine gemeine aus verſchiedenen Gliedern zuſam-<lb/>mengeſetzte Angelruthe, von der jedoch das letzte dünnſte <lb/>Glied abgenommen iſt. </s>
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4911 <s xml:id="echoid-s2464" xml:space="preserve">Aus dem Ende dieſer Ruthe geht <lb/>eine dünne mit Siegellak überzogne Glasröhre C hervor. </s>
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4912 <s xml:id="echoid-s2465" xml:space="preserve"><lb/>An ihr befindet ſich ein Stück Kork D, von welchem ein <lb/>Elektrometer mit Korkkügelchen herabhängt. </s>
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4913 <s xml:id="echoid-s2466" xml:space="preserve">H G I iſt <lb/>ein Bindfaden, welcher an das andere Ende der Röhre <lb/>befeſtiget iſt, und bey G von einem Schnürchen F G ge-
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4914 <pb o="163" file="0183" n="183" rhead="Atmoſphäriſche Elektricität."/>
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4915 halten wird. </s>
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4916 <s xml:id="echoid-s2467" xml:space="preserve">Am Ende des Bindſadens bey T iſt eine <lb/>Stecknadel befeſtiget. </s>
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4917 <s xml:id="echoid-s2468" xml:space="preserve">Wenn man dieſe in den Kork D <lb/>ſteckt, ſo iſt das Elektrometer E uniſolirt. </s>
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4918 <s xml:id="echoid-s2469" xml:space="preserve">Will man nun <lb/>mit dieſem Inſtrumente die Elektricität der Atmoſphäre <lb/>beobachten, ſo ſtoße man die Stecknadel T in den Kork D, <lb/>halte den Stab bey dem untern Ende A, ſtecke ihn zu ei-<lb/>nem Fenſter im oberſten Stockwerke des Hauſes heraus, <lb/>und halte das andere Ende der Röhre mit dem Elektrome-<lb/>ter ſo hoch, daß der Stab mit dem Horizont einen Win-<lb/>kel von 50° — 60° macht. </s>
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4919 <s xml:id="echoid-s2470" xml:space="preserve">In dieſer Stellung halte man <lb/>das Inſtrument einige Secunden, ziehe dann an dem <lb/>Bindfaden bey H, und mache dadurch die Stecknadel <lb/>von dem Korke D los, wodurch der Bindfaden in die punk-<lb/>tirte Lage K L fällt, das Elektrometer aber iſolirt, und <lb/>auf die der Elektricität der Atmoſphäre entgegengeſetzte Art <lb/>elektriſirt bleibt. </s>
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4920 <s xml:id="echoid-s2471" xml:space="preserve">Hierauf ziehe man das Elektrometer ins <lb/>Zimmer, ſo kann man die Beſchaffenheit der Elektricität <lb/>unterſuchen, ohne durch Wind oder Dunkelheit gehindert <lb/>zu werden.</s>
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4921 <s xml:id="echoid-s2472" xml:space="preserve"/>
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4922 </p>
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4923 <p>
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4924 <s xml:id="echoid-s2473" xml:space="preserve">Fig. </s>
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4925 <s xml:id="echoid-s2474" xml:space="preserve">81 iſt das ebenfalls vom Herrn Cavallo er-<lb/>fundene <emph style="bf">Regenelektrometer</emph>.</s>
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4926 <s xml:id="echoid-s2475" xml:space="preserve">A B C T iſt eine ſtarke <lb/>Glasröhre, ohngefähr 2{1/2} Schuh lang, an deren Ende <lb/>ein zinnerner Trichter D E angeküttet iſt, welcher einen <lb/>Theil der Rühre vor dem Regen beſchützet. </s>
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4927 <s xml:id="echoid-s2476" xml:space="preserve">Die äußere <lb/>Oberfläche der Röhre von A bis B iſt mit Siegellak öber-<lb/>zogen, ſo wie auch der Theil, der von dem Trichter bedeckt <lb/>wird. </s>
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4928 <s xml:id="echoid-s2477" xml:space="preserve">F D iſt ein Stück Rohr, um welches einige meſſin-<lb/>gene Dräthe in verſchiedenen Richtungen geflochten ſind, <lb/>ſo daß ſie leicht etwas Regen auffangen, und doch dem <lb/>Winde nicht Widerſtand thun. </s>
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4929 <s xml:id="echoid-s2478" xml:space="preserve">Dieſes Stück Rohr iſt an <lb/>die Röhre befeſtiget; </s>
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4930 <s xml:id="echoid-s2479" xml:space="preserve">aus ihm geht ein dünner Drath <lb/>durch die Röhre hindurch, und iſt mit dem ſtärkern Dra-<lb/>the A G verbunden, der in einem Stück Kork ſteckt, wel-<lb/>ches in das Ende der Röhre A befeſtiget iſt. </s>
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4931 <s xml:id="echoid-s2480" xml:space="preserve">Das Ende <lb/>G des Drathes A G iſt in einen Ring gebogen, an wel-<lb/>chen man ein empfindliches Korkelektrometer hängen kann.</s>
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4932 <s xml:id="echoid-s2481" xml:space="preserve">
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4933 <pb o="164" file="0184" n="184" rhead="Zwölftes Capitel."/>
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4934 Dieſes Inſtrument wird an die Seite des Fenſterrahmens <lb/>befeſtiget, wo es von ſtarken meſſingenen Haken getragen <lb/>wird. </s>
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4935 <s xml:id="echoid-s2482" xml:space="preserve">In dieſer Abſicht wird die Röhre bey C B mit <lb/>einer ſeidnen Schnur umwunden, damit die Haken deſto <lb/>beſſer faſſen können. </s>
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4936 <s xml:id="echoid-s2483" xml:space="preserve">Der Theil F C ragt zu dem Fen-<lb/>ſter heraus, und das Ende F iſt ein wenig über die Hori-<lb/>zontallinie erhöhet. </s>
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4937 <s xml:id="echoid-s2484" xml:space="preserve">Der übrige Theil des Inſtruments <lb/>geht durch ein Loch in dem Fenſterrahmen in das Zimmer <lb/>hinein, und innerhalb des Rahmens ſelbſt befindet ſich <lb/>blos der Theil C B. </s>
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4938 <s xml:id="echoid-s2485" xml:space="preserve">Wenn es regnet, und vorzüglich <lb/>bey vorübergehenden Platzregen, wird dieſes Inſtrument <lb/>öfters elektriſirt, und man kann durch die Divergenz der <lb/>Kügelchen des Elektrometers die Stärke und Beſchaffen-<lb/>heit der Elektricität des Regens beobachten, ohne dabey <lb/>einem Irrthume ausgeſetzt zu ſeyn. </s>
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4939 <s xml:id="echoid-s2486" xml:space="preserve">Herr Cavallo iſt <lb/>im Stande geweſen, mit dieſem Inſtrumente am Drathe <lb/>A G eine kleine belegte Flaſche zu laden. </s>
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4940 <s xml:id="echoid-s2487" xml:space="preserve">Es muß ſo be-<lb/>feſtiget werden, daß man es leicht vom Fenſter abnehmen <lb/>und wieder darauf ſtellen kann; </s>
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4941 <s xml:id="echoid-s2488" xml:space="preserve">denn man muß es ſehr <lb/>oft abwiſchen und trocknen, beſonders wenn ſich ein Platz-<lb/>regen nähert.</s>
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4942 <s xml:id="echoid-s2489" xml:space="preserve"/>
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4943 </p>
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4944 </div>
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4945 <div xml:id="echoid-div224" type="section" level="1" n="216">
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4946 <head xml:id="echoid-head237" xml:space="preserve">Beſchreibung eines kleinen portativen atmoſphäri-<lb/>ſchcn Elektrometers, von Herrn Cavallo.</head>
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4947 <p>
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4948 <s xml:id="echoid-s2490" xml:space="preserve">Der vornehmſte Theil dieſes Inſtruments iſt eine glä-<lb/>ſerne Röhre C D M N Fig. </s>
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4949 <s xml:id="echoid-s2491" xml:space="preserve">76. </s>
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4950 <s xml:id="echoid-s2492" xml:space="preserve">Dieſe iſt an ihrem un-<lb/>tern Theile in das meſſingene Stück A B eingeküttet, an <lb/>welchem man das Inſtrument halten kann, wenn es zur <lb/>Unterſuchung der Atmoſphäre gebraucht werden ſoll; </s>
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4951 <s xml:id="echoid-s2493" xml:space="preserve">auch <lb/>dient es, um das Inſtrument in das meſſingene Gehäuſe <lb/>A B O einzuſchrauben. </s>
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4952 <s xml:id="echoid-s2494" xml:space="preserve">Der obere Theil der Röhre C D <lb/>M N läuft in ein ſchmales cylindriſches Ende aus, welches <lb/>ganz mit Siegellack überzogen iſt; </s>
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4953 <s xml:id="echoid-s2495" xml:space="preserve">in dieſes Ende iſt eine <lb/>kleine Glasröhre eingeküttet, deren unteres ebenfalls mit <lb/>Siegellak überzogn s Ende ein wenig in die Röhre <lb/>C D M N hineinreicht; </s>
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4954 <s xml:id="echoid-s2496" xml:space="preserve">in dieſe kleine Röhre iſt ein Drath
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4955 <pb o="165" file="0185" n="185" rhead="Atmoſphäriſche Elektricität."/>
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4956 eingeküttet, deſſen unteres Ende das flache Stück Elfen-<lb/>bein H, welches durch einen Kork in die Röhre befeſtiget <lb/>iſt, berühret; </s>
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4957 <s xml:id="echoid-s2497" xml:space="preserve">das obere Ende des Draths geht ohngefähr <lb/>{1/4} Zoll weit über die Röhre hinaus, und läßt ſich in die <lb/>meſſingene Haube E F einſchrauben, welche am Boden <lb/>offen iſt, und den Regen von dem mit Siegellak überzo-<lb/>genen Theile des Inſtruments abhält.</s>
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4958 <s xml:id="echoid-s2498" xml:space="preserve"/>
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4959 </p>
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4960 <p>
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4961 <s xml:id="echoid-s2499" xml:space="preserve">T M und K N ſind zween ſchmale Streifen Stan-<lb/>niol an der innern Seite der Röhre C D M N befeſtiget; <lb/></s>
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4962 <s xml:id="echoid-s2500" xml:space="preserve">ſie ſtehen mit dem meſſingenen Boden A B in Verbin-<lb/>dung, und dienen, die Elektricität abzuleiten, welche ſich <lb/>den Korkkugeln, wenn ſie das Glas berühren, mittheilet, <lb/>und welche ſonſt, wenn ſie ſich anhäufte, die freye Bewe-<lb/>gung dieſer Kugeln hindern möchte.</s>
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4963 <s xml:id="echoid-s2501" xml:space="preserve"/>
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4964 </p>
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4965 <p>
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4966 <s xml:id="echoid-s2502" xml:space="preserve">Will man dieſes Inſtrument zur künſtlichen Elek-<lb/>tricität gebrauchen, ſo elektriſire man die meſſingene Hau-<lb/>be durch eine elektriſirte Subſtanz, und die Divergenz <lb/>oder Convergenz der Korkkugeln bey Annäherung eines <lb/>geriebenen elektriſchen Körpers wird die Beſchaffenheit der <lb/>Elektricität zeigen. </s>
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4967 <s xml:id="echoid-s2503" xml:space="preserve">Die beſte Art das Inſtrument zu <lb/>elektriſiren iſt dieſe, daß man geriebenes Siegellak ſo nahe <lb/>an die meſſingene Haube bringt, daß eine oder beyde <lb/>Korkkugeln die@ Seiten der Flaſche C D M N berühren; <lb/></s>
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4968 <s xml:id="echoid-s2504" xml:space="preserve">nach dieſer Berührung werden ſie ſogleich zuſammen fal-<lb/>len und unelektriſirt ſcheinen. </s>
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4969 <s xml:id="echoid-s2505" xml:space="preserve">Nimmt man nun das Sie-<lb/>gellak wieder hinweg, ſo werden ſie wiederum divergiren, <lb/>und poſitiv elektriſirt bleiben.</s>
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4970 <s xml:id="echoid-s2506" xml:space="preserve"/>
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4971 </p>
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4972 <p>
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4973 <s xml:id="echoid-s2507" xml:space="preserve">Will man aber dieſes Elektrometer zu Unterſuchung <lb/>der Elektricität des Nebels, der Luft, der Wolken u. </s>
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4974 <s xml:id="echoid-s2508" xml:space="preserve">dgl. <lb/></s>
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4975 <s xml:id="echoid-s2509" xml:space="preserve">gebrauchen, ſo darf man es nur von dem Gehäuſe A B O <lb/>abſchrauben, und es bey dem Boden A B in die Luft hal-<lb/>ten, ſo hoch, daß es ein wenig über dem Kopfe ſteht, und <lb/>man die Korkkugeln P bequem ſehen kann. </s>
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4976 <s xml:id="echoid-s2510" xml:space="preserve">Dieſe Ku-<lb/>geln werden, wofern einige Elektricität vorhanden iſt, ſo-<lb/>gleich divergiren; </s>
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4977 <s xml:id="echoid-s2511" xml:space="preserve">und ob dieſe Elektricität poſitid oder <lb/>negativ ſey, wird man beſtimmen können, wenn man eine
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4978 <pb o="166" file="0186" n="186" rhead="Zwölftes Capitel."/>
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4979 geriebene Stange Siegellak oder eiven andern geriebenen <lb/>elektriſchen Körper gegen die meſſingene Haube E F <lb/>bringet.</s>
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4980 <s xml:id="echoid-s2512" xml:space="preserve"/>
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4981 </p>
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4982 </div>
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4983 <div xml:id="echoid-div225" type="section" level="1" n="217">
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4984 <head xml:id="echoid-head238" xml:space="preserve">Allgenteine Geſetze, aus den Verſuchen mit dem <lb/>elektriſchen Drachen hergeleitet.</head>
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4985 <p>
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4986 <s xml:id="echoid-s2513" xml:space="preserve">1) Es ſcheint allezeit einige Elektricität in der Luft <lb/>zu geben. </s>
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4987 <s xml:id="echoid-s2514" xml:space="preserve">Ihre Elektricität iſt allezeit poſitiv, und weit <lb/>ſtärker bey kaltem als bey warmem Wetter; </s>
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4988 <s xml:id="echoid-s2515" xml:space="preserve">auch iſt ſie <lb/>keinesweges in der Nacht geringer, als am Tage.</s>
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4989 <s xml:id="echoid-s2516" xml:space="preserve"/>
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4990 </p>
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4991 <p>
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4992 <s xml:id="echoid-s2517" xml:space="preserve">2) Die Gegenwart der Wolken vermindert gemei-<lb/>niglich die Elektricität des Drachens; </s>
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4993 <s xml:id="echoid-s2518" xml:space="preserve">bisweilen hat <lb/>ſie gar keinen Einfluß auf dieſelbe, und ſehr ſelten ver-<lb/>ſtärkt ſie ſie ein wenig.</s>
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4994 <s xml:id="echoid-s2519" xml:space="preserve"/>
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4995 </p>
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4996 <p>
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4997 <s xml:id="echoid-s2520" xml:space="preserve">3) Wenn es regnet, iſt die Elektricität des Dra-<lb/>chen mehrentheils negativ, und ſehr ſelten poſitiv.</s>
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4998 <s xml:id="echoid-s2521" xml:space="preserve"/>
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4999 </p>
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5000 <p>
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5001 <s xml:id="echoid-s2522" xml:space="preserve">4) Das Nordlicht ſcheint auf die Elektricität des <lb/>Drachen keinen Einfluß zu haben.</s>
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5002 <s xml:id="echoid-s2523" xml:space="preserve"/>
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5003 </p>
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5004 <p>
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5005 <s xml:id="echoid-s2524" xml:space="preserve">5) Der elektriſche Funken, den man aus der Schnur <lb/>des Drachen oder aus einem damit verbundenen iſolirten <lb/>Leiter ziehet, iſt, beſonders wenn es nicht regnet, ſehr ſel-<lb/>ten länger als {1/4} Zoll, aber außerordentlich ſtechend. </s>
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5006 <s xml:id="echoid-s2525" xml:space="preserve">Wenn <lb/>der Zeiger des Elektrometers auch nicht höher als 20° <lb/>ſteht, ſo wird die Perſon, die den Funken ziehet, dennoch <lb/>denſelben bis in die Schenkel ſühlen; </s>
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5007 <s xml:id="echoid-s2526" xml:space="preserve">er iſt alſo mehr dem <lb/>Schlage einer geladenen Flaſche, als dem Funken aus <lb/>dem erſten Leiter einer Elektriſirmaſchine ähnlich.</s>
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5008 <s xml:id="echoid-s2527" xml:space="preserve"/>
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5009 </p>
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5010 <p>
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5011 <s xml:id="echoid-s2528" xml:space="preserve">6) Die Elektricität des Drachens iſt überhaupt ſtär-<lb/>ker oder ſchwächer, je nachdem die Schnur länger oder <lb/>kürzer iſt, doch bleibt ſie nicht in Proportion mit der Län-<lb/>ge der Schnur. </s>
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5012 <s xml:id="echoid-s2529" xml:space="preserve">Wenn z. </s>
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5013 <s xml:id="echoid-s2530" xml:space="preserve">B. </s>
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5014 <s xml:id="echoid-s2531" xml:space="preserve">die durch eine Schnur von <lb/>100 Yards erhaltene Elektricität den Zeiger des Elektro-<lb/>meters bis 20° erhebt, ſo wird ihn die durch eine doppelt <lb/>ſo lange Schnur herabgeleitete nicht höher als auf 25° <lb/>erheben.</s>
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5015 <s xml:id="echoid-s2532" xml:space="preserve"/>
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5016 </p>
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5017 <pb o="167" file="0187" n="187" rhead="Atmoſphäriſche Elektricität."/>
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5018 <p>
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5019 <s xml:id="echoid-s2533" xml:space="preserve">7) Wenn das Wetter feucht und die Elektricität <lb/>ſtark iſt, ſo ſteigt der Zeiger des Elektrometers, wenn man <lb/>einen Funken aus der Schnur gezogen, oder den Knopf <lb/>einer belegten Flaſche gegen dieſelbe gehalten hat, mit <lb/>großer Geſchwindigkeit wieder an ſeine Stelle; </s>
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5020 <s xml:id="echoid-s2534" xml:space="preserve">aber bey <lb/>trocknem und warmen Wetter ſteigt er außerordentlich <lb/>langſam.</s>
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5021 <s xml:id="echoid-s2535" xml:space="preserve"/>
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5022 </p>
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5023 <p>
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5024 <s xml:id="echoid-s2536" xml:space="preserve">Aus denen über die Elektricität der Atmoſphäre an-<lb/>geſtellten Beobachtungen erhellet, daß die Natur von der <lb/>elektriſchen Materie bey Beförderung der Vegetation Ge-<lb/>brauch mache.</s>
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5025 <s xml:id="echoid-s2537" xml:space="preserve"/>
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5026 </p>
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5027 <p>
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5028 <s xml:id="echoid-s2538" xml:space="preserve">1) Im Frühling, wenn die Pflanzen zu wachſen <lb/>anfangen, fangen auch von Zeit zu Zeit elektriſche Wolken <lb/>an zu erſcheinen, und elektriſchen Regen auszugießen. <lb/></s>
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5029 <s xml:id="echoid-s2539" xml:space="preserve">Die Elektricität der Wolken und des Regens nimmt zu <lb/>bis in diejenige Zeit das Herbſtes, in welcher die letzten <lb/>Früchte eingeſammlet werden.</s>
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5030 <s xml:id="echoid-s2540" xml:space="preserve"/>
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5031 </p>
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5032 <p>
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5033 <s xml:id="echoid-s2541" xml:space="preserve">2) Die elektriſche Materie verſieht das natürliche <lb/>Feuer mit derjenigen Feuchtigkeit, durch deren Hülfe es <lb/>die Vegetation bewirkt und belebet; </s>
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5034 <s xml:id="echoid-s2542" xml:space="preserve">ſie iſt die Triebfeder, <lb/>welche die Dünſte ſammlet, die Wolken bildet, und dann <lb/>wieder gebraucht wird, ſie zu zerſtören und in Regen <lb/>aufzulöſen.</s>
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5035 <s xml:id="echoid-s2543" xml:space="preserve"/>
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5036 </p>
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5037 <p>
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5038 <s xml:id="echoid-s2544" xml:space="preserve">3) Aus eben dieſem Grundſatze läßt ſich das Sprich-<lb/>wort erklären, daß kein Begießen ſo fruchtbar ſey, als der <lb/>Regen. </s>
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5039 <s xml:id="echoid-s2545" xml:space="preserve">Die Regenwolken wirken durch ihre elektriſche <lb/>Atmoſphäre auf die Pfla nzen, und machen die Oefnungen <lb/>und Zwiſchenräume derſelben geſchickter, das Waſſer auf-<lb/>zunehmen, welches mit dieſer durchdringenden und aus-<lb/>dehnenden Materie imprägnirt iſt. </s>
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5040 <s xml:id="echoid-s2546" xml:space="preserve">Ucberdies iſt es auch <lb/>ſehr natürlich, anzunehmen, daß die poſitive Elektricität, <lb/>welche bey gutem Wetter allezeit die Oberhand hat, zur <lb/>Beförderung der Vegetation beytrage, da man dies auch <lb/>bey der künſtlichen Elektricität in der That ſo befunden hat.</s>
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5041 <s xml:id="echoid-s2547" xml:space="preserve"/>
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5042 </p>
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5043 <pb o="168" file="0188" n="188" rhead="Zwölftes Capitel."/>
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5044 </div>
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5045 <div xml:id="echoid-div226" type="section" level="1" n="218">
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5046 <head xml:id="echoid-head239" xml:space="preserve">Ueber die Nothwendigkeit der Beobachtungen der <lb/>atmoſphäriſchen Elektricität zur Meteorologie, <lb/>von Herrn Achard.</head>
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5047 <p>
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5048 <s xml:id="echoid-s2548" xml:space="preserve">Da es nunmehr ſehr deutlich erwieſen iſt, daß die <lb/>Elektricität die Urſache verſchiedner meteorologiſchen Phä-<lb/>nomene ſey, ſo muß man ſich wundern, daß die Natur-<lb/>forſcher noch nicht die unumgängliche Nothwendigkeit ein-<lb/>geſehen haben, den Werkzeugen, welche die Schwere, <lb/>Wärme und Feuchtigkeit der Luft angeben, auch eines zu <lb/>Beſtimmung ihrer Elektricität beyzufügen.</s>
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5049 <s xml:id="echoid-s2549" xml:space="preserve"/>
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5050 </p>
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5051 <p>
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5052 <s xml:id="echoid-s2550" xml:space="preserve">Ohne uns hier auf die verſchiedenen Beweiſe des <lb/>Einfluſſes der Elektricität auf die Meteore einzulaſſen, <lb/>wird es genug ſeyn, zu bemerken, daß wir keine genaue <lb/>Kenntniß von Phänomenen, die aus mehreren mit einan-<lb/>der verbundenen Urſachen entſtehen, erlangen können, ohne <lb/>mit allen dieſen Urſachen bekannt zu ſeyn; </s>
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5053 <s xml:id="echoid-s2551" xml:space="preserve">denn wird nur <lb/>eine einzige davon vernachläßiget, ſo iſt es unmöglich, die <lb/>Phänomene durchgängig zu erklären. </s>
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5054 <s xml:id="echoid-s2552" xml:space="preserve">Wenn auch die <lb/>Elektricität nicht die einzige Urſache verſchiedener meteo-<lb/>rologiſcher Erſcheinungen iſt, ſo iſt ſie doch gewiß bey ihrer <lb/>Entſtehung mitwirkend, und wenn wir ſie alſo nicht eben <lb/>ſo wohl, als das Barometer a. </s>
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5055 <s xml:id="echoid-s2553" xml:space="preserve">beobachten, ſo verlieren <lb/>wiv alle Vortheile der übrigen, ſonſt noch ſo genauen, <lb/>meteorologiſchen Beobachtungen.</s>
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5056 <s xml:id="echoid-s2554" xml:space="preserve"/>
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5057 </p>
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5058 <p>
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5059 <s xml:id="echoid-s2555" xml:space="preserve">Der Einfluß der Elektricität auf die Vegetation iſt <lb/>durch Beobachtungen mehrerer Gelehrten außer Zweifel <lb/>geſetzt; </s>
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5060 <s xml:id="echoid-s2556" xml:space="preserve">man ſieht alſo deutlich, daß die botaniſchen Wet-<lb/>terbeobachtungen nie ſo brauchbar werden können, als ſich <lb/>erwarten läßt, wofern wir nicht Beobachtungen über den <lb/>elektriſchen Zuſtand der Atmoſphäre hinzufügen. </s>
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5061 <s xml:id="echoid-s2557" xml:space="preserve">Viel-<lb/>leicht liegt darinn die Urſache, warum es unmöglich iſt, <lb/>aus denen von 1751 bis 1769 fortgeſetzten botaniſchen <lb/>Wetterbeobachtungen der Herren Gautier und Duha-<lb/>mel einige Folgen zu ziehen.</s>
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5062 <s xml:id="echoid-s2558" xml:space="preserve"/>
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5063 </p>
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5064 <pb o="169" file="0189" n="189" rhead="Atmoſphäriſche Elektricität."/>
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5065 <p>
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5066 <s xml:id="echoid-s2559" xml:space="preserve">Herr Achard hat zwar nur Gelegenheit gehabt, <lb/>einige wenige Beobachtungen zu machen; </s>
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5067 <s xml:id="echoid-s2560" xml:space="preserve">aber ſchon dieſe <lb/>waren hinreichend, ihn von der genauen Verbindung zwi-<lb/>ſchen den meiſten Luſterſcheinungen und der atmoſphäri-<lb/>ſchen Elektricität zu überzeugen.</s>
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5068 <s xml:id="echoid-s2561" xml:space="preserve"/>
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5069 </p>
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5070 <p>
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5071 <s xml:id="echoid-s2562" xml:space="preserve">Um zu entdecken, ob die Atmoſphäre elektriſirt ſey, <lb/>gebrauchte er ein Paar leichte Rorkkugeln an einer Stange <lb/>Siegellak. </s>
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5072 <s xml:id="echoid-s2563" xml:space="preserve">Dieſes Elektrometer iſt wegen ſeiner Sim-<lb/>plicität faſt allen andern vorzuziehen, wenn es bloß dar-<lb/>auf ankömmt, zu entdecken, ob Elektricität in der Atmo-<lb/>ſphäre ſey.</s>
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5073 <s xml:id="echoid-s2564" xml:space="preserve"/>
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5074 </p>
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5075 <p>
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5076 <s xml:id="echoid-s2565" xml:space="preserve">Im Monat Julius 1778 beobachtete Herr Achard <lb/>täglich die Elektricität der Atmoſphäre Morgens, Mit-<lb/>tags und Abends mit einem Paar kleiner Korkkugeln, <lb/>welche über dem Dache des Hauſes ohngefähr 40 Schuh <lb/>hoch ſtanden, und von Gebäuden, Bäumen a. </s>
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5077 <s xml:id="echoid-s2566" xml:space="preserve">hinläng-<lb/>lich entfernt waren. </s>
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5078 <s xml:id="echoid-s2567" xml:space="preserve">Dieſe ganze Zeit über fand er nur <lb/>10 Tage, an welchen gar kein Zeichen einer Elektricität <lb/>zu bemerken war; </s>
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5079 <s xml:id="echoid-s2568" xml:space="preserve">und 17 Tage, die vorigen 10 mit ein-<lb/>geſchloſſen, an welchen er keine Elektricität des Morgens <lb/>bemerkte, ob ſie gleich ſonſt des Mittags ſichtbar ward, <lb/>und gegen Sonnenuntergang ſtark zunahm. </s>
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5080 <s xml:id="echoid-s2569" xml:space="preserve">An allen übri-<lb/>gen Tagen zeigte ſich die Luft den ganzen Tag elektriſch, aber <lb/>allezeit am ſtärkſten gegen Sonnenuntergang, nach wel-<lb/>cher Zeit die Elektricität dann bald wieder anfieng abzu-<lb/>nehmen.</s>
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5081 <s xml:id="echoid-s2570" xml:space="preserve"/>
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5082 </p>
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5083 <p>
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5084 <s xml:id="echoid-s2571" xml:space="preserve">Wenn ſich der vorher heitere Himmel plötzlich mit <lb/>Wolken überzog, ſo zeigte das Elektrometer beſtändige <lb/>Veränderungen in der Elektricität der Atmoſphäre an, <lb/>welche bald ſtieg, bald verſchwand, bald wieder erſchien; <lb/></s>
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5085 <s xml:id="echoid-s2572" xml:space="preserve">in welchem letztern Falle ſie gemeiniglich von der poſitiven <lb/>zur negativen, oder umgekehrt, übergegangen war. </s>
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5086 <s xml:id="echoid-s2573" xml:space="preserve">Bey <lb/>ſtürmiſchen Wetter fand er es wegen der beſtändigen Be-<lb/>wegung der Kugeln ſchwer, mit dieſem Elektrometer zu <lb/>beobachten. </s>
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5087 <s xml:id="echoid-s2574" xml:space="preserve">War die Luft ſchwer, aber nicht windigt, ſo <lb/>ſchien es ſich beträchtlich zu ändern. </s>
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5088 <s xml:id="echoid-s2575" xml:space="preserve">War das Wetter
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5089 <pb o="170" file="0190" n="190" rhead="Zwölftes Capitel."/>
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5090 ſehr ſtill, und der Himmel ohne Wolken, ſo änderte es ſich <lb/>nicht im geringſten, außer daß es gegen Sonnenunter-<lb/>gang ein wenig ſtieg.</s>
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5091 <s xml:id="echoid-s2576" xml:space="preserve"/>
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5092 </p>
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5093 <p>
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5094 <s xml:id="echoid-s2577" xml:space="preserve">Merkwürdig iſt es, daß in der Nacht kein Thau fiel, <lb/>wenn den Tag vorher keine Elektricität in der Luft bemerkt <lb/>worden war; </s>
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5095 <s xml:id="echoid-s2578" xml:space="preserve">in den übrigen Nächten fiel bald mehr, bald <lb/>weniger Thau. </s>
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5096 <s xml:id="echoid-s2579" xml:space="preserve">Er hält zwar ſeine Beobachtungen nicht <lb/>für hinreichend, zu erweiſen, daß der Thau von der Elek-<lb/>tricität entſtehe; </s>
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5097 <s xml:id="echoid-s2580" xml:space="preserve">allein ſo viel glaubt er ſicher daraus her-<lb/>leiten zu können, daß das Aufſteigen und Niederfallen des <lb/>Thaues durch die Elektricität der Luft befördert oder ver-<lb/>hindert werden könne. </s>
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5098 <s xml:id="echoid-s2581" xml:space="preserve">Man kann ſich leicht denken, auf <lb/>welche Art die Elektricität dieſe Wirkung hervorbringe. <lb/></s>
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5099 <s xml:id="echoid-s2582" xml:space="preserve">Geſetzt, die Luft ſey poſitiv oder negativ elektriſirt, die <lb/>Erdfläche aber nicht; </s>
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5100 <s xml:id="echoid-s2583" xml:space="preserve">ſo werden die wäſſerigen und flüch-<lb/>tigen Theile der Pflanzen, welche von den Sonnenſtralen <lb/>aufgezogen werden, und in der Luft ſchweben, durch die <lb/>Mittheilung elektriſiret. </s>
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5101 <s xml:id="echoid-s2584" xml:space="preserve">Wenn die Luft nach Sonnen-<lb/>untergang abkühlet, ſo hält ſie die wäſſerigen Theilchen <lb/>nicht mehr mit der vorigen Kraft an ſich, und da dieſe <lb/>von den leitenden Körpern auf der Oberfläche der Erde an-<lb/>gezogen werden, ſo legen ſie ſich in Geſtalt des Thaues <lb/>an dieſelben. </s>
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5102 <s xml:id="echoid-s2585" xml:space="preserve">Iſt die Oberfläche der Erde elektriſirt, und <lb/>die Luft nicht, ſo wird die Wirkung eben dieſelbe ſeyn. </s>
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5103 <s xml:id="echoid-s2586" xml:space="preserve"><lb/>Sind Erde und Luft beyde, aber auf entgegengeſetzte Art, <lb/>elektriſirt, ſo wird die Anziehung ſtärker und der Thau <lb/>häufiger ſeyn; </s>
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5104 <s xml:id="echoid-s2587" xml:space="preserve">haben aber beyde einerley Elektricität, und <lb/>dies in gleichem Grade, ſo wird kein Thau fallen. </s>
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5105 <s xml:id="echoid-s2588" xml:space="preserve">Auch <lb/>iſt bekannt, daß der Thau nicht auf alle Körper mit glei-<lb/>cher Leichtigkeit, und daß er auf elektriſche Körper am <lb/>häufigſten fällt. </s>
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5106 <s xml:id="echoid-s2589" xml:space="preserve">Dieſe Erfahrung läßt ſich ſehr leicht <lb/>erklären, wenn wir annehmen, die Elektricität ſey die Ur-<lb/>ſache des Thaues; </s>
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5107 <s xml:id="echoid-s2590" xml:space="preserve">denn elektriſche Körper nehmen nicht <lb/>ſo leicht die Elektricität des ſie umgebenden Mittels an, <lb/>daher findet ſich allezeit ein größerer Unterſchied zwiſchen <lb/>der Elektricität der Luft und der darinn liegenden elektri-
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5108 <pb o="171" file="0191" n="191" rhead="Atmoſphäriſche Elektricität."/>
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5109 ſchen Körptr, als zwiſchen der Elektricität der Luft und <lb/>der darinn befindlichen Leiter. </s>
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5110 <s xml:id="echoid-s2591" xml:space="preserve">Da nun die Kraft der <lb/>elektriſchen Anziehung in der Verhältniß dieſes Unter-<lb/>ſchicds wirkt, ſo muß der Thau allerdings häufiger auf <lb/>elektriſche Körper fallen.</s>
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5111 <s xml:id="echoid-s2592" xml:space="preserve"/>
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5112 </p>
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5113 <p>
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5114 <s xml:id="echoid-s2593" xml:space="preserve">Weil alſo die Elektricität oft, und vielleicht allezeit, <lb/>die Urſache des Thaues iſt, ſo kann man nicht zweiflen, <lb/>daß ihre Beobachtung zur botaniſchen Meteorologie höchſt <lb/>nöthig ſey, indem der Einfluß des Thaues auf das Wachs-<lb/>thum der Pflanzen allgemein bekannt iſt.</s>
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5115 <s xml:id="echoid-s2594" xml:space="preserve"/>
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5116 </p>
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5117 <p>
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5118 <s xml:id="echoid-s2595" xml:space="preserve">In den philoſophiſchen Transactionen vom Jahre <lb/>1773 findet man Beobachtungen über die Elektricität der <lb/>Nebel, woraus erhellet, daß dieſelben gemeiniglich elek-<lb/>triſch ſind. </s>
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5119 <s xml:id="echoid-s2596" xml:space="preserve">Herr Achard hat einige Beobachtungen ge-<lb/>macht, welche damit vollkommen übereinſtimmen: </s>
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5120 <s xml:id="echoid-s2597" xml:space="preserve">er fand <lb/>die Luft beym Nebel allezeit mehr oder weniger elektriſch. <lb/></s>
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5121 <s xml:id="echoid-s2598" xml:space="preserve">Zweymal bemerkte er, daß der Nebel in wenigen Minu-<lb/>ten gänzlich aufhörete, und in Geſtalt eines feinen Regens <lb/>herabfiel; </s>
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5122 <s xml:id="echoid-s2599" xml:space="preserve">und obgleich der Nebel ſehr ſtark war, ver-<lb/>ſchwand er doch in ſieben Minuten völlig. </s>
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5123 <s xml:id="echoid-s2600" xml:space="preserve">Es iſt auch <lb/>ſehr wahrſcheinlich, daß der Regen durch die Elektricität <lb/>veranlaſſet werde. </s>
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5124 <s xml:id="echoid-s2601" xml:space="preserve">Wir werden hievon überführt, wenn <lb/>wir an das Anziehen und Zurückſtoßen denken, welches <lb/>die irdiſche und atmoſphäriſche Elektricität ſo wohl zwi-<lb/>ſchen der Oberfläche der Erde und den in der Luft enthal-<lb/>tenen Dünſten, als auch zwiſchen den Theilen dieſer Dün-<lb/>ſte ſelbſt veranlaſſen muß, welches nothwendig ſtrebt, die <lb/>in der Atmoſphäre ſchwebenden Waſſertheilchen zu zer-<lb/>ſtreuen oder zu verbinden, und ſie der Erde näher zu brin-<lb/>gen, oder von derſelben weiter zu entfernen.</s>
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5125 <s xml:id="echoid-s2602" xml:space="preserve"/>
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5126 </p>
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5127 <p>
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5128 <s xml:id="echoid-s2603" xml:space="preserve">Nachdem Herr Achard bewieſen hat, wie nothwen-<lb/>dig es ſey, die Beobachtungen der Elektricität der At-<lb/>moſphäre mit den übrigen meteorologiſchen zu verbinden, <lb/>ſo kömmt er nunmehr auf die Anzeige der Eigenſchaften, <lb/>welche von einem guten atmoſphäriſchen Elektrometer er-
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5129 <pb o="172" file="0192" n="192" rhead="Zwölftes Capitel."/>
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5130 fordert werden, deſſen Mangel ſehr deutlich zeigt, wie <lb/>nachläßig die Naturforſcher bisher über dieſen Punkt ge-<lb/>dacht haben.</s>
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5131 <s xml:id="echoid-s2604" xml:space="preserve"/>
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5132 </p>
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5133 </div>
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5134 <div xml:id="echoid-div227" type="section" level="1" n="219">
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5135 <head xml:id="echoid-head240" xml:space="preserve">Rothwendige Eigenſchaften eines atmoſphäriſchen <lb/>Elektrometers.</head>
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5136 <p>
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5137 <s xml:id="echoid-s2605" xml:space="preserve">1) Sein Gebrauch muß leicht ſeyn.</s>
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5138 <s xml:id="echoid-s2606" xml:space="preserve"/>
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5139 </p>
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5140 <p>
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5141 <s xml:id="echoid-s2607" xml:space="preserve">2) Es muß nicht allein anzeigen, daß die Luft elek-<lb/>triſch ſey, ſondern auch, in welchem Grade ſie es ſey.</s>
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5142 <s xml:id="echoid-s2608" xml:space="preserve"/>
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5143 </p>
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5144 <p>
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5145 <s xml:id="echoid-s2609" xml:space="preserve">3) Es muß angeben, ob ſie poſitiv oder negativ ſey.</s>
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5146 <s xml:id="echoid-s2610" xml:space="preserve"/>
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5147 </p>
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5148 <p>
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5149 <s xml:id="echoid-s2611" xml:space="preserve">4) Es muß bey Gewittern den Beobachter keine@ <lb/>Gefahr ausſetzen.</s>
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5150 <s xml:id="echoid-s2612" xml:space="preserve"/>
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5151 </p>
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5152 <p>
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5153 <s xml:id="echoid-s2613" xml:space="preserve">5) Es muß ſich bequem tragen laſſen.</s>
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5154 <s xml:id="echoid-s2614" xml:space="preserve"/>
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5155 </p>
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5156 <p>
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5157 <s xml:id="echoid-s2615" xml:space="preserve">Der Verfertigung eines Inſtruments, welches alle <lb/>dieſe Vorzüge in ſich vereinigen ſoll, ſtehen ſehr viele <lb/>Schwierigkeiten entgegen. </s>
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5158 <s xml:id="echoid-s2616" xml:space="preserve">Die größte beſteht darinn, <lb/>daß das Metall, welches die Elertricität aus der Luft er-<lb/>hält, ſo iſolirt werden muß, daß der Regen keine Ver-<lb/>bindung zwiſchen demſelben und der Erde machen kann, <lb/>und daß die Iſolirung vollkommen genug ſeyn muß, um <lb/>eine allzuſchnelle Zerſtreuung der Elektricität des Metalls <lb/>zu verhüten. </s>
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5159 <s xml:id="echoid-s2617" xml:space="preserve">Herr Achard behauptet zwar nicht, alle <lb/>dieſe Schwierigkeiten überwunden zu haben; </s>
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5160 <s xml:id="echoid-s2618" xml:space="preserve">er hat aber <lb/>doch nach verſchiednen Verſuchen ein Inſtrument erfunden, <lb/>das ſich leicht genug tragen, und ohne alle Gefahr zu Be-<lb/>obachtungen gebrauchen läßt.</s>
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5161 <s xml:id="echoid-s2619" xml:space="preserve"/>
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5162 </p>
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5163 </div>
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5164 <div xml:id="echoid-div228" type="section" level="1" n="220">
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5165 <head xml:id="echoid-head241" xml:space="preserve">Beſchreibung eines tragbaren atmoſphäriſchen <lb/>Elektrometers.</head>
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5166 <p>
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5167 <s xml:id="echoid-s2620" xml:space="preserve">Dieſes Inſtrument beſteht aus einem hohlen abge-<lb/>kürzten Kegel von Zinn, deſſen oberes Ende offen, das <lb/>untere aber durch eine zinnerne Platte verſchloſſen iſt. <lb/></s>
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5168 <s xml:id="echoid-s2621" xml:space="preserve">Dieſe Platte iſt auf der innern Seite mit einer 2 Zoll di-
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5169 <pb o="173" file="0193" n="193" rhead="Atmoſphäriſche Elektricität."/>
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5170 cken Lage von Pech überzogen: </s>
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5171 <s xml:id="echoid-s2622" xml:space="preserve">an die untere Fläche dieſer <lb/>Lage von Pech iſt eine zinnerne Röhre geküttet, welche <lb/>man auf ein hölzernes Stativ ſetzen, und dadurch den Ke-<lb/>gel ſo ſtellen kann, daß ſeine größere niederwärts gekehrte <lb/>Grundfläche horizontal ſteht; </s>
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5172 <s xml:id="echoid-s2623" xml:space="preserve">das Pech iſolirt den Kegel <lb/>vollkommen, und hindert den Verluſt ſeiner Elektricität, <lb/>wenn er elektriſiret wird. </s>
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5173 <s xml:id="echoid-s2624" xml:space="preserve">Der Kegel muß hoch genug, <lb/>und ſeine untere Grundfläche in Vergleichung mit der obern <lb/>groß genug ſeyn, um den Regen, wenn er auch ſchief auf-<lb/>fallen ſollte, abzuhalten, daß er nicht entweder im Falle <lb/>ſelbſt, oder beym Abſpritzen vom Fußgeſtelle die untere <lb/>Fläche des Pechs beſpritze, mit welchem der Boden des <lb/>abgekürzten Kegels inwendig bedeckt iſt; </s>
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5174 <s xml:id="echoid-s2625" xml:space="preserve">ſonſt würde der <lb/>Kegel nicht mehr iſolirt ſeyn, und das Elektrometer ſich <lb/>in einen Conductor verwandlen. </s>
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5175 <s xml:id="echoid-s2626" xml:space="preserve">An den ſchmalen Theil <lb/>des Kegels befeſtigt Herr Achard einen viereckigten eiſer-<lb/>nen Stab, und hängt an denſelben ein Thermorneter <lb/>und zwey Elektrometer, von denen das eine ſehr leicht iſt, <lb/>und ſich alſo durch ſehr geringe Grade der Elektricität in <lb/>Bewegung ſetzen läßt, das andere aber mehr Schwere <lb/>hat, und ſich daher nur dann bewegt, wenn die Elektrici-<lb/>tät für das leichtere Elektrometer zu ſtark wird. </s>
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5176 <s xml:id="echoid-s2627" xml:space="preserve">Außer <lb/>dieſen beyden Elektrometern bindet Herr Achard noch ei-<lb/>nen Faden an den eiſernen Stab, welcher durch ſein Auf-<lb/>ſteigen die geringſten Grade der Elektricität anzeigt. </s>
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5177 <s xml:id="echoid-s2628" xml:space="preserve">Das <lb/>Ganze iſt in eine oben und unten ofne gläſerne Glocke ein-<lb/>geſchloſſen: </s>
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5178 <s xml:id="echoid-s2629" xml:space="preserve">der Grund dieſer Glocke iſt ebenfalls mit Pech <lb/>iſolirt, damit er keine Elektricität von dem zinnernen Ke-<lb/>gel ableite; </s>
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5179 <s xml:id="echoid-s2630" xml:space="preserve">der Zwiſchenraum am obern Ende der Glocke, <lb/>zwiſchen der eiſernen Stange, welche durch daſſelbe hin-<lb/>durchgeht, und dem Glaſe, wird ebenfalls mit Pech aus-<lb/>gefüllt, um die Mittheilung der Elektricität an das Glas <lb/>zu verhüten; </s>
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5180 <s xml:id="echoid-s2631" xml:space="preserve">um aber dieſes Pech vor dem Regen zu be-<lb/>ſchützen, welcher ſonſt daſſelbe beſeuchten, und eine Com-<lb/>munication zwiſchen dem Stabe und der Glocke machen <lb/>würde, wird das Pech mit einem gläſernen Trichter be-
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5181 <pb o="174" file="0194" n="194" rhead="Zwölftes Capitel."/>
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5182 deckt, durch welchen der Stab durchgeht, und der den <lb/>Regen von dem Peche abhält. </s>
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5183 <s xml:id="echoid-s2632" xml:space="preserve">Dieſe Glocke iſt auch un-<lb/>entbehrlich, um den Wind von den Elektrometern abzu-<lb/>halten, welcher es ſonſt unmöglich machen würde, ſie ge-<lb/>nau zu beobachten. </s>
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5184 <s xml:id="echoid-s2633" xml:space="preserve">Ans Ende des durch die Glocke hin-<lb/>durchgehenden metallenen Stabes kann man hohle zinner-<lb/>ne Röhren befeſtigen, die aber nur einen kleinen Durch-<lb/>meſſer haben dürfen, damit ſie ſo leicht, als möglich, wer-<lb/>den, und mit dieſen kann man eine Höhe von 10, 20 bis <lb/>30 Schuhen erreichen. </s>
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5185 <s xml:id="echoid-s2634" xml:space="preserve">Die letzte Röhre endigt ſich oben <lb/>in eine eiſerne ſehr ſcharfe und wohl vergoldete Spitze; <lb/></s>
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5186 <s xml:id="echoid-s2635" xml:space="preserve">die Vergoldung iſt nothwendig, damit die Spitze, welche <lb/>allzeit eben und glatt bleiben muß, nicht roſte. </s>
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5187 <s xml:id="echoid-s2636" xml:space="preserve">Die Hö-<lb/>he, die man dieſen zinnernen Röhren zu geben hat, muß <lb/>ſich nach der Höhe der Gebäude oder Bäume an den <lb/>verſchiedenen Beobachtungsorten richten; </s>
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5188 <s xml:id="echoid-s2637" xml:space="preserve">das oberſte <lb/>Ende der Röhre muß allezeit wenigſtens 6 Schuhe über <lb/>alle in der Nähe befindliche Körper hervorragen. </s>
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5189 <s xml:id="echoid-s2638" xml:space="preserve">Herr <lb/>Achard verbindet mit dieſer Maſchine ein Thermometer, <lb/>das man zugleich beobachten und dadurch vielleicht die <lb/>Verbindung zwiſchen der Elektricität und der Tempera-<lb/>tur der Luft entdecken kann. </s>
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5190 <s xml:id="echoid-s2639" xml:space="preserve">In ähnlicher Abſicht kann <lb/>man auch leicht noch ein Barometer und ein Hygrometer <lb/>hinzuſetzen.</s>
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5191 <s xml:id="echoid-s2640" xml:space="preserve"/>
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5192 </p>
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5193 <p>
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5194 <s xml:id="echoid-s2641" xml:space="preserve">Um zu beſtimmen, ob die Elektricität der Luft poſi-<lb/>tiv oder negativ ſey, hängt Herr Achard eine Korkkugel <lb/>an einem leinenen Faden an den Drath, welcher mit dem <lb/>eiſernen Stabe verbunden iſt, und durch das Pech am <lb/>Boden des abgekürzten Kegels hindurchgehet. </s>
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5195 <s xml:id="echoid-s2642" xml:space="preserve">Dieſer <lb/>Drath muß ſo lang ſeyn, daß man poſitiv oder negativ <lb/>elektriſche Körper bequem an die daranhängende Korkku-<lb/>gel bringen kann; </s>
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5196 <s xml:id="echoid-s2643" xml:space="preserve">je nachdem nun dieſe Körper die Kugel <lb/>anziehen oder zurückſtoßen, iſt die Elektricität, welche das <lb/>Iuſtrument von der Luft angenommen hat, poſitiv oder <lb/>negativ.</s>
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5197 <s xml:id="echoid-s2644" xml:space="preserve"/>
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5198 </p>
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5199 <pb o="175" file="0195" n="195" rhead="Atmoſphäriſche Elektricität."/>
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5200 <p>
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5201 <s xml:id="echoid-s2645" xml:space="preserve">Um den Beobachter gegen die plötzlichen Anhäufun-<lb/>gen der Elektricität, welche bisweilen erfolgen, ſicher zu <lb/>ſtellen, befeſtiget Herr Achard an den Grund des Fuß-<lb/>geſtells einen eiſernen Stab, der mit der Erde nicht allein <lb/>in Verbindung ſteht, ſondern ſogar einige Schuhe tief in <lb/>dieſelbe hinein geht. </s>
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5202 <s xml:id="echoid-s2646" xml:space="preserve">Das obere Ende dieſes Stabs iſt <lb/>mit einem runden Knopfe oder Balle verſehen, der nur <lb/>einen Zoll weit von dem Kegel abſtehen darf. </s>
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5203 <s xml:id="echoid-s2647" xml:space="preserve">Wenn <lb/>ſich die Elektricität ſo anhäuft, daß das Inſtrument ſie <lb/>nicht mehr faſſen kann, ſo entladet ſie ſich von ſelbſt in <lb/>den metallenen Stab, der ſie unter die Erde führt. </s>
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5204 <s xml:id="echoid-s2648" xml:space="preserve">Eben <lb/>dies geſchieht, wenn der Blitz auf das Inſtrument fällt, <lb/>wobey der Beobachter in einer Entfernung von wenigen <lb/>Schuhen nicht die geringſte Gefahr läuft. </s>
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5205 <s xml:id="echoid-s2649" xml:space="preserve">Steht das <lb/>Inſtrument in einem Garten, ſo hat dieſe Art, eine Ver-<lb/>bindung mit der Erde zu machen, nichts unbequemes; <lb/></s>
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5206 <s xml:id="echoid-s2650" xml:space="preserve">will man aber das Inſtrument lieber im Hauſe gebrau-<lb/>chen (wobey man die zinnerne Röhre durch eine Oefnung <lb/>im Dache führen, und die Maſchine in eine Dachkammer <lb/>ſtellen muß) ſo läßt ſich die angezeigte Methode nicht <lb/>leicht anbringen: </s>
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5207 <s xml:id="echoid-s2651" xml:space="preserve">in dieſem Falle muß man die Verbin-<lb/>dung durch einen metallenen Stab machen, der von der <lb/>Dachkammer einige Schuh tief unter die Erde hinab geht. </s>
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5208 <s xml:id="echoid-s2652" xml:space="preserve"><lb/>Zu größerer Sicher heit gegen ein herannahendes Gewit-<lb/>ter würde es dienen, wenn man den metallenen Stab mit <lb/>dem zinnernen Kegel in Berührung brächte: </s>
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5209 <s xml:id="echoid-s2653" xml:space="preserve">ſo würde <lb/>das Inſtrument ein wirklicher Ableiter werden. </s>
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5210 <s xml:id="echoid-s2654" xml:space="preserve">und an-<lb/>ſtatt das Haus der Gefahr auszuſetzen, daſſelbe vielmehr <lb/>vor aller Beſchädigung durch den Blitz beſchützen.</s>
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5211 <s xml:id="echoid-s2655" xml:space="preserve"/>
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5212 </p>
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5213 <p>
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5214 <s xml:id="echoid-s2656" xml:space="preserve">Wenn das Inſtrument in einer Dachkammer oder <lb/>auf dem Platform eines Hauſes ſteht, ſo hat man nichts <lb/>von dem Aufſteigen des Thaues zu befürchten; </s>
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5215 <s xml:id="echoid-s2657" xml:space="preserve">ſteht es <lb/>aber in einem Garten, ſo hängt ſich der Thau an das <lb/>Pech, welches die abgeſtumpfte Grundfläche des Kegels <lb/>bedeckt, und macht auf dieſe Art eine Communication <lb/>zwiſchen dem Kegel und der Erde, wodurch das Inſtru-
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5216 <pb o="176" file="0196" n="196" rhead="Zwölftes Capitel."/>
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5217 ment die Elektricität, mit der es geladen iſt, verlieret. <lb/></s>
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5218 <s xml:id="echoid-s2658" xml:space="preserve">Um dieſen Zufall zu verhüten, muß man den Boden um <lb/>die Stelle des Inſtruments herum ſo pflaſtern, daß ſich <lb/>das Pflaſter nach allen Seiten zu, wenigſtens 2 bis 3 <lb/>Schuh über die Peripherie der untern Grundfläche des <lb/>Kegels hinaus erſtrecke: </s>
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5219 <s xml:id="echoid-s2659" xml:space="preserve">ſo wird das Aufſteigen des Thau-<lb/>es, welcher ſich an das Pech hängen und das Inſtrument <lb/>beſchädigen könnte, mit dem beſten Erfolge verhindert <lb/>ſeyn.</s>
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5220 <s xml:id="echoid-s2660" xml:space="preserve"/>
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5221 </p>
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5222 <p>
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5223 <s xml:id="echoid-s2661" xml:space="preserve">Wenn die Luft elektriſirt iſt, ſo muß ſie nothwendig <lb/>ihre Elektricität den in ihr enthaltenen Dämpfen mitthei-<lb/>len. </s>
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5224 <s xml:id="echoid-s2662" xml:space="preserve">Dies erhellet augenſcheinlich aus der Entſtehung des <lb/>Blitzes, welcher nicht durch Entladung der elektriſchen <lb/>Materie aus der Luft, ſondern aus den in ihr ſchwebenden <lb/>Dünſten erzeugt wird. </s>
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5225 <s xml:id="echoid-s2663" xml:space="preserve">Hieraus folgt, daß Regen, Schnee, <lb/>Hagel, Reif und Thau ſehr oft elektriſch ſeyn müſſen. </s>
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5226 <s xml:id="echoid-s2664" xml:space="preserve">Da <lb/>es Herrn Achard von großer Wichtigkeit zu ſeyn ſcheinet, <lb/>die Elektricität dieſer Meteore genau zu kennen und zu <lb/>beobachten, ſo hat er zu Entdeckung ihrer Natur und des <lb/>Grades ihrer Stärke eine eigne Maſchine erfunden. </s>
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5227 <s xml:id="echoid-s2665" xml:space="preserve">Dieſe <lb/>beſteht aus einem abgekürzten Kegel von Zinn, der am <lb/>obern Ende verſchloſſen, unten aber offen, und eben ſo, <lb/>wie die Maſchine zur Luftelektricität auf einem Fußgeſtell <lb/>iſolirt iſt. </s>
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5228 <s xml:id="echoid-s2666" xml:space="preserve">Mitten in den obern abgeſtumpften Theil des <lb/>Kegels befeſtiget Herr Achard eine mit einer Kugel geen-<lb/>dete eiſerne Stange, bedeckt das Ganze mit einer iſolirten <lb/>gläſernen Glocke, welche mit ihrem obern Ende noch 3 <lb/>Zoll weit über die Kugel hinausreicht: </s>
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5229 <s xml:id="echoid-s2667" xml:space="preserve">an die Kugel <lb/>bringt er ein ſehr empfindliches Elektrometer, und über-<lb/>dieß einen leinenen Faden, um die geringſten Grade der <lb/>Elektricität zu entdecken. </s>
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5230 <s xml:id="echoid-s2668" xml:space="preserve">Da dieſes Inſtrument wenig <lb/>Höhe, und kein zugeſpitztes Ende hat, ſo nimmt es nicht <lb/>leichtlich die Elektricität der Luft an, welche ſo nahe bey <lb/>der Erde allezeit unmerklich iſt; </s>
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5231 <s xml:id="echoid-s2669" xml:space="preserve">hingegen der Regen, <lb/>Schnee, Hagel, Reif und Thau, weicher auf den Kegel <lb/>fällt, macht es elektriſch, und der Grad dieſer Elektricität
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5232 <pb o="177" file="0197" n="197" rhead="Atmoſphäriſche Elektricität."/>
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5233 wird von dem unter der Glocke befindlichen Elektrometer <lb/>angegeben. </s>
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5234 <s xml:id="echoid-s2670" xml:space="preserve">Um nun zu erfahren, ob ſie poſitiv oder ne-<lb/>gativ ſey, darf der Beobachter nur eben ſo verfahren, wie <lb/>oben bey Erklärung des Inſtruments zur Luftelektricität <lb/>angewieſen worden iſt. </s>
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5235 <s xml:id="echoid-s2671" xml:space="preserve">Außer den Beobachtungen der <lb/>Elektricität wäſſeriger Meteore kann dieſes Inſtrument <lb/>auch noch zu andern Abſichten gebraucht werden. </s>
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5236 <s xml:id="echoid-s2672" xml:space="preserve">Man <lb/>kann es auf eine ſehr vortheilhafte Art mit dem atmoſphä-<lb/>riſchen Elektrometer vergleichen, um den wahren Urſprung <lb/>der Luftelektricität zu entdecken, und zu ſehen, ob ſie un-<lb/>mittelbar aus der Luft oder aus den fremden in der At-<lb/>moſphäre ſchwebenden Körpern komme; </s>
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5237 <s xml:id="echoid-s2673" xml:space="preserve">denn das at-<lb/>moſphäriſche Elektrometer kann auch durch Regen, <lb/>Schnee, Hagel a. </s>
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5238 <s xml:id="echoid-s2674" xml:space="preserve">elektriſch werden, und die Verglei-<lb/>chung beyder Inſtrumente iſt das einzige Herrn Acha d <lb/>bekannte Mittel, zu erfahren, ob das atmoſphäriſche <lb/>Elektrometer ſeine Elektricität unmittelbar aus der Luſt, <lb/>oder mittelbar durch die in derſelben ſchwebenden leitenden <lb/>Kötper erhalte. </s>
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5239 <s xml:id="echoid-s2675" xml:space="preserve">Wenn während des Regens, Schnees, <lb/>Hagels a. </s>
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5240 <s xml:id="echoid-s2676" xml:space="preserve">das atmoſphäriſche Elektrometer elektriſch, <lb/>hingegen das zur Elektricität wäſſeriger Meteore beſtimm-<lb/>re nicht elektriſch iſt, ſo kann man mit Gewißheit <lb/>ſchließen, daß die Elektricität des erſtern bloß aus der <lb/>Luft komme; </s>
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5241 <s xml:id="echoid-s2677" xml:space="preserve">ſind hingegen beyde elektriſch, ſo muß man <lb/>unterſuchen, ob ſie es in gleichem Grade ſind; </s>
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5242 <s xml:id="echoid-s2678" xml:space="preserve">iſt dies der <lb/>Fall, ſo muß man die Elektricität lediglich dem Regen <lb/>oder Schnee u. </s>
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5243 <s xml:id="echoid-s2679" xml:space="preserve">ſ. </s>
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5244 <s xml:id="echoid-s2680" xml:space="preserve">w. </s>
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5245 <s xml:id="echoid-s2681" xml:space="preserve">zuſchreiben. </s>
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5246 <s xml:id="echoid-s2682" xml:space="preserve">Ich habe nicht erſt <lb/>nöthig, anzuführen, daß in Ermangelung des Regens, <lb/>Schnees u. </s>
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5247 <s xml:id="echoid-s2683" xml:space="preserve">ſ. </s>
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5248 <s xml:id="echoid-s2684" xml:space="preserve">w. </s>
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5249 <s xml:id="echoid-s2685" xml:space="preserve">des atmoſphäriſche Elektrometer allezeit <lb/>die Elektricität der Luft anzeige.</s>
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5250 <s xml:id="echoid-s2686" xml:space="preserve"/>
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5251 </p>
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5252 <pb o="178" file="0198" n="198" rhead="Dreyzehntes Capitel."/>
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5253 </div>
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5254 <div xml:id="echoid-div229" type="section" level="1" n="221">
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5255 <head xml:id="echoid-head242" xml:space="preserve">Dreyzehntes Capitel.</head>
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5256 <head xml:id="echoid-head243" xml:space="preserve">Von der Ausbreitung und Zertheilung flüßiger <lb/>Materien durch die Elektricität.</head>
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5257 <p>
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5258 <s xml:id="echoid-s2687" xml:space="preserve">Wir ſind die Kenntniſſe des Gegenſtandes, der den <lb/>Inhalt dieſes Capitels ausmacht, größtentheils <lb/>dem Abt Nollet ſchuldig, welcher dieſe Materie mit <lb/>unglaublichem Fleiße und anhaltender Gedult unterſucht <lb/>hat. </s>
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5259 <s xml:id="echoid-s2688" xml:space="preserve">Ich habe hier bloß die vornehmſten Reſultate ſei-<lb/>ner Verſuche anführen können, und muß die Leſer, in Ab-<lb/>ſicht auf umſtändlichere Nachrichten, auf Nollet’s eig-<lb/>ne Schriften oder auf des D. </s>
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5260 <s xml:id="echoid-s2689" xml:space="preserve">Prieſtley Geſchichte der <lb/>Elektricität verweiſen.</s>
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5261 <s xml:id="echoid-s2690" xml:space="preserve"/>
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5262 </p>
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5263 <p>
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5264 <s xml:id="echoid-s2691" xml:space="preserve">Die Electricität vermehrt die natürliche Ausdün-<lb/>ſtung flüßiger Materien; </s>
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5265 <s xml:id="echoid-s2692" xml:space="preserve">alle flüßige Körper, mit wel-<lb/>chen man den Verſuch angeſtellt hat, nur Queckſilber und <lb/>Oele ausgenommen, haben dabey eine Verminderung er-<lb/>litten, die man keiner andern Urſache, als der Elektrici-<lb/>rät, zuſchreiben konnte.</s>
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5266 <s xml:id="echoid-s2693" xml:space="preserve"/>
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5267 </p>
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5268 <p>
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5269 <s xml:id="echoid-s2694" xml:space="preserve">Sie verſtärkt auch die Ausdünſtung derjenigen flüßi-<lb/>gen Materien am meiſten, welche von Natur leicht zur <lb/>Ausdünſtung geneigt ſind. </s>
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5270 <s xml:id="echoid-s2695" xml:space="preserve">Flüchtiger Salmiakgeiſt ver. <lb/></s>
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5271 <s xml:id="echoid-s2696" xml:space="preserve">liert mehr, als Weingeiſt, dieſer mehr als Waſſer u.</s>
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5272 <s xml:id="echoid-s2697" xml:space="preserve">ſ.</s>
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5273 <s xml:id="echoid-s2698" xml:space="preserve">w.</s>
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5274 <s xml:id="echoid-s2699" xml:space="preserve"/>
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5275 </p>
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5276 <p>
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5277 <s xml:id="echoid-s2700" xml:space="preserve">Die Elektricität wirkt am ſtärkſten auf flüßige Ma-<lb/>terien, wenn die Gefäße, worinn ſie ſich befinden, Lei-<lb/>ter ſind. </s>
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5278 <s xml:id="echoid-s2701" xml:space="preserve">Die Ausdünſtung war am ſtärkſten, <lb/>wenn die Gefäße große Oefnungen hatten, ſie nahm aber <lb/>nicht im Verhältniß der Oefnungen zu. </s>
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5279 <s xml:id="echoid-s2702" xml:space="preserve">Inzwiſchen be-<lb/>wirkt die Elektricität nie eine Ausdünſtung durch die Zwi-<lb/>ſchenräume der Metalle oder des Glaſes.</s>
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5280 <s xml:id="echoid-s2703" xml:space="preserve"/>
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5281 </p>
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5282 <p>
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5283 <s xml:id="echoid-s2704" xml:space="preserve">Um dieſen Grundſätzen noch mehrern Umfang zu <lb/>geben, ſtellte der Abt Noilet eine große Anzahl Verſu-<lb/>che mit elektriſirten Haarröhren an, und fand, daß der
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5284 <pb o="179" file="0199" n="199" rhead="Zertheilung flüßiger Materien durch die Elektric."/>
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5285 aus denſelben ausgehende Strom ſich zwar theilte, aber <lb/>doch nicht merklich beſchleuniget wurde, wenn die Röhre <lb/>nicht weniger als {1/10} Zoll Weite im Lichten hatte. </s>
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5286 <s xml:id="echoid-s2705" xml:space="preserve">Iſt <lb/>der Durchmeſſer kleiner, aber doch noch weit genug, um <lb/>die flüßige Materie in einem Strome fortrinnen zu laſſen, <lb/>ſo beſchleunigt die Elektricität die Bewegung in einem <lb/>geringen Grade. </s>
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5287 <s xml:id="echoid-s2706" xml:space="preserve">Iſt aber die Röhre ſo eng, daß das <lb/>Waſſer nur in einzelnen Tropfen heraus geht, ſo verwand-<lb/>let ſich dieſes Tröpfeln durch das Elektriſiren in einen be-<lb/>ſtändigen Strom, theilt ſich ſogar in mehrere kleine Strö-<lb/>me, und die Bewegung wird beträchtlich beſchleuniget: <lb/></s>
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5288 <s xml:id="echoid-s2707" xml:space="preserve">je enger die Röhre, deſto größer iſt die Beſchleunigung. </s>
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5289 <s xml:id="echoid-s2708" xml:space="preserve"><lb/>Iſt die Oefnung weiter als {1/10} Zoll, ſo ſcheint die Elek-<lb/>tricität die Bewegung vielmehr aufzuhalten.</s>
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5290 <s xml:id="echoid-s2709" xml:space="preserve"/>
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5291 </p>
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5292 </div>
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5293 <div xml:id="echoid-div230" type="section" level="1" n="222">
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5294 <head xml:id="echoid-head244" xml:space="preserve">181. Verſuch.</head>
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5295 <p>
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5296 <s xml:id="echoid-s2710" xml:space="preserve">Fig. </s>
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5297 <s xml:id="echoid-s2711" xml:space="preserve">77. </s>
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5298 <s xml:id="echoid-s2712" xml:space="preserve">zeigt ein metallnes Gefäß, an welches eine <lb/>Haarröhre angebracht iſt, aus der das Waſſer nur in un-<lb/>terbrochenen Tropfen heraus gehen kann. </s>
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5299 <s xml:id="echoid-s2713" xml:space="preserve">Man fülle das <lb/>Gefäß mit Waſſer, hänge es an den erſten Leiter der Ma-<lb/>ſchine, und drehe den Cylinder derſelben, ſo wird das <lb/>Waſſer in einem ununterbrochenen Strome durch die Röh-<lb/>re laufen; </s>
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5300 <s xml:id="echoid-s2714" xml:space="preserve">auch wird ſich dieſer Strom in mehrere andere <lb/>zertheilen, und im Finſtern leuchten.</s>
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5301 <s xml:id="echoid-s2715" xml:space="preserve"/>
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5302 </p>
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5303 </div>
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5304 <div xml:id="echoid-div231" type="section" level="1" n="223">
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5305 <head xml:id="echoid-head245" xml:space="preserve">182. Verſuch.</head>
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5306 <p>
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5307 <s xml:id="echoid-s2716" xml:space="preserve">Man hänge ein Gefäß an einen poſitiven und ein <lb/>anderes an einen negativen Conductor ſo, daß die Enden <lb/>der Röhren etwa 3 — 4 Zoll von einander abſtehen, ſo <lb/>wird der Strom, der aus der einen hervorgeht, von dem <lb/>andern angezogen werden, und beyde werden einen einzi-<lb/>gen im Finſtern leuchtenden Strom ausmachen.</s>
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5308 <s xml:id="echoid-s2717" xml:space="preserve"/>
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5309 </p>
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5310 <p>
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5311 <s xml:id="echoid-s2718" xml:space="preserve">Werden die Gefäße an zwe@n poſitive, oder an zween <lb/>negative Conductoren gehangen, ſo ſtoßen ſich die Ströme <lb/>zurück, und weichen einander aus.</s>
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5312 <s xml:id="echoid-s2719" xml:space="preserve"/>
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5313 </p>
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5314 <pb o="180" file="0200" n="200" rhead="Dreyzehntes Capitel."/>
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5315 </div>
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5316 <div xml:id="echoid-div232" type="section" level="1" n="224">
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5317 <head xml:id="echoid-head246" xml:space="preserve">183. Verſuch.</head>
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5318 <p>
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5319 <s xml:id="echoid-s2720" xml:space="preserve">Man ſtelle ein metallnes Becken auf ein iſolirendes <lb/>Stativ, verbinde es mit dem erſten Leiter, und laſſe einen <lb/>ſchwachen Strom Waſſer in daſſelbe rinnen, ſo wird ſich <lb/>im Dunkeln ein ſehr ſchönes Schauſpiel zeigen, und der <lb/>Strom wird ſich in eine große Anzahl leuchtender Tropfen <lb/>zu vertheilen ſcheinen.</s>
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5320 <s xml:id="echoid-s2721" xml:space="preserve"/>
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5321 </p>
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5322 </div>
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5323 <div xml:id="echoid-div233" type="section" level="1" n="225">
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5324 <head xml:id="echoid-head247" xml:space="preserve">184. Verſuch.</head>
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5325 <p>
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5326 <s xml:id="echoid-s2722" xml:space="preserve">Man tauche einen Schwamm in Waſſer, und hän-<lb/>ge ihn an den Conductor; </s>
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5327 <s xml:id="echoid-s2723" xml:space="preserve">ſo wird das Waſſer, welches <lb/>vorher nur herabtröpfelte, nunmehr ſehr häufig herab-<lb/>fließen, und im Dunklen eine Art von Feuerregen bilden.</s>
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5328 <s xml:id="echoid-s2724" xml:space="preserve"/>
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5329 </p>
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5330 </div>
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5331 <div xml:id="echoid-div234" type="section" level="1" n="226">
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5332 <head xml:id="echoid-head248" xml:space="preserve">185. Verſuch.</head>
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5333 <p>
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5334 <s xml:id="echoid-s2725" xml:space="preserve">Man halte ein Gefäß, welches mit mehreren in ver-<lb/>ſchiedenen Richtungen geſtellten Haarröhren verſehen iſt, <lb/>nahe an einen elektriſirten Conductor, ſo wird das Waſſer <lb/>aus den gegen den Conductor gekehrten Röhren ausſtrö-<lb/>men, aus den vom Conductor abgewendeten hingegen nur <lb/>unterbrochen und tropfenweiſe herabfallen.</s>
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5335 <s xml:id="echoid-s2726" xml:space="preserve"/>
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5336 </p>
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5337 </div>
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5338 <div xml:id="echoid-div235" type="section" level="1" n="227">
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5339 <head xml:id="echoid-head249" xml:space="preserve">186. Verſuch.</head>
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5340 <p>
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5341 <s xml:id="echoid-s2727" xml:space="preserve">Der Knopf einer geladenen Flaſche zieht einen Tro-<lb/>pfen Waſſer aus einem Napfe an ſich. </s>
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5342 <s xml:id="echoid-s2728" xml:space="preserve">So bald man die <lb/>Flaſche von dem Napfe hinwegnimmt, ſo nimmt dieſer <lb/>Tropſen eine coniſche Geſtalt an, und wenn man ihn ei-<lb/>nem Leiter nähert, ſo wird er mit Gewalt in kleinen Strö-<lb/>men fortgetrieben, welche im Finſtern leuchten.</s>
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5343 <s xml:id="echoid-s2729" xml:space="preserve"/>
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5344 </p>
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5345 <p>
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5346 <s xml:id="echoid-s2730" xml:space="preserve">Man ſieht aus dieſem Verſuche, daß die elektriſche <lb/>Materie nicht allein die Waſſertheilchen von einander zu <lb/>trennen, und eben ſo, wie das Feuer, in Dämpfe zu zer-<lb/>ſtreuen ſuche, ſondern auch, daß ſie dies mit ungemeiner <lb/>Gewalt und Geſchwindigkeit thue.</s>
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5347 <s xml:id="echoid-s2731" xml:space="preserve"/>
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5348 </p>
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5349 </div>
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5350 <div xml:id="echoid-div236" type="section" level="1" n="228">
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5351 <head xml:id="echoid-head250" xml:space="preserve">187. Verſuch.</head>
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5352 <p>
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5353 <s xml:id="echoid-s2732" xml:space="preserve">Man entlade eine Batterie durch einen Waſſertro-<lb/>pfen, den man vorher auf den Knopf einer von ihren Fla-
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5354 <pb o="181" file="0201" n="201" rhead="Zertheilung flüßiger Materien durch Elektricität."/>
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5355 ſchen hat fallen laſſen, ſo wird der ganze Tropfen augen-<lb/>blicklich in Dampf zerſtrcut; </s>
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5356 <s xml:id="echoid-s2733" xml:space="preserve">auch ſind die Funken weit <lb/>länger und dichter, als gewöhnlich.</s>
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5357 <s xml:id="echoid-s2734" xml:space="preserve"/>
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5358 </p>
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5359 <p>
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5360 <s xml:id="echoid-s2735" xml:space="preserve">Beccaria bemerkt, wenn man einen Schlag auf <lb/>eine gewiſſe Weite durch einen oder mehrere Tropfen <lb/>Queckſilber gehen laſſe, ſo verbreite ſich der Schlag durch <lb/>die Tropfen und treibe ſie in Dämpfen auf; </s>
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5361 <s xml:id="echoid-s2736" xml:space="preserve">ein Theil die-<lb/>ſer Dämpfe ſteige in Form eines Rauchs in die Luft, ein <lb/>anderer Theil bleibe am Glaſe hängen.</s>
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5362 <s xml:id="echoid-s2737" xml:space="preserve"/>
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5363 </p>
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5364 </div>
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5365 <div xml:id="echoid-div237" type="section" level="1" n="229">
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5366 <head xml:id="echoid-head251" xml:space="preserve">188. Verſuch.</head>
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5367 <p>
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5368 <s xml:id="echoid-s2738" xml:space="preserve">Ein Waſſertropfen, der von der condenſirenden Ku-<lb/>gel eines elektriſirten Conductors herabhängt, ſtreckt ſich, <lb/>wenn man einen Becher mit Waſſer darunter ſetzt, gegen <lb/>daſſelbe aus, und verlängert und verkürzt ſich nach der <lb/>jedesmaligen Stärke der Elektricität.</s>
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5369 <s xml:id="echoid-s2739" xml:space="preserve"/>
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5370 </p>
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5371 </div>
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5372 <div xml:id="echoid-div238" type="section" level="1" n="230">
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5373 <head xml:id="echoid-head252" xml:space="preserve">189. Verſuch.</head>
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5374 <p>
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5375 <s xml:id="echoid-s2740" xml:space="preserve">Man bringe einen Waſſertropfen an den erſten Lei-<lb/>ter, und drehe die Maſchine, ſo wird man lange im Zik-<lb/>zak gehende Funken aus demſelben ziehen können; </s>
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5376 <s xml:id="echoid-s2741" xml:space="preserve">der <lb/>Tropfen wird eine coniſche Geſtalt annehmen, der Kör-<lb/>per, der den Funken erhält, wird befeuchtet werden, und <lb/>die Funken werden beträchtlich länger ſeyn, als man ſie <lb/>ohne Waſſer aus dem Conductor erhalten kann.</s>
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5377 <s xml:id="echoid-s2742" xml:space="preserve"/>
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5378 </p>
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5379 </div>
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5380 <div xml:id="echoid-div239" type="section" level="1" n="231">
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5381 <head xml:id="echoid-head253" xml:space="preserve">190. Verſuch.</head>
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5382 <p>
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5383 <s xml:id="echoid-s2743" xml:space="preserve">Man ſtelle eine Stange Siegellak ſo auf den Con-<lb/>ductor, daß man ſie leicht mit einem Lichte anzünden <lb/>kann, und drehe den Cylinder, indem das Siegellak <lb/>brennt, ſo wird das ſchmelzende Ende ſpitzig werden, und <lb/>einen feinen faſt unſichtbaren Faden, der über eine Elle <lb/>lang iſt, in die Luft auswerfen. </s>
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5384 <s xml:id="echoid-s2744" xml:space="preserve">Wenn man die Fäden, <lb/>welche das Siegellak auf dieſe Art ausſtößt, mit einem <lb/>Bogen Papier auffängt, ſo wird das Papier davon auf <lb/>eine ſonderbare Art bedeckt, und die Theilchen des Siegel-<lb/>laks werden in ſo feine Fäden zertheilt, daß man es für
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5385 <pb o="182" file="0202" n="202" rhead="Vierzehntes Capitel."/>
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5386 feine Baumwolle halten ſollte. </s>
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5387 <s xml:id="echoid-s2745" xml:space="preserve">Um das Siegellak ſchick-<lb/>lich auf den Conductor zu befeſtigen, klebe man es auf <lb/>einen dünnen Streif Papier, und beuge die Enden des <lb/>Papiers ſo, daß es in eine der Höhlungen des Condu-<lb/>ctors einpaßt; </s>
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5388 <s xml:id="echoid-s2746" xml:space="preserve">ſo kann man es bequem aufſtellen, und mit <lb/>dem Lichte anzünden.</s>
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5389 <s xml:id="echoid-s2747" xml:space="preserve"/>
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5390 </p>
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5391 </div>
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5392 <div xml:id="echoid-div240" type="section" level="1" n="232">
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5393 <head xml:id="echoid-head254" xml:space="preserve">191. Verſuch.</head>
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5394 <p>
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5395 <s xml:id="echoid-s2748" xml:space="preserve">Man iſolire einen kleinen Springbrunnen, (wie <lb/>man dergleichen durch Verdichtung der Luft leicht machen <lb/>kann), der nur einen einzigen Strom ausſendet, und <lb/>elektriſire denſelben, ſo wird ſich der Strom in ſehr viele <lb/>andere theilen, die ſich gleichförmig über einen ſehr großen <lb/>Raum auf dem Boden verbreiten werden. </s>
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5396 <s xml:id="echoid-s2749" xml:space="preserve">Durch ab-<lb/>wechſelndes Auflegen eines Fingers auf den Conductor <lb/>und Wegnehmung deſſelben, kann man nach Gefallen be-<lb/>fehlen, ob das Waſſer in einem Strome, oder in mehre-<lb/>ren, ſpringen ſolle.</s>
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5397 <s xml:id="echoid-s2750" xml:space="preserve"/>
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5398 </p>
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5399 </div>
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5400 <div xml:id="echoid-div241" type="section" level="1" n="233">
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5401 <head xml:id="echoid-head255" xml:space="preserve">192. Verſuch.</head>
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5402 <p>
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5403 <s xml:id="echoid-s2751" xml:space="preserve">Man elektriſire zween iſolirte Springbrunnen mit <lb/>entgegengeſetzten Elektricitäten, ſo werden ſich die Strö-<lb/>me aus beyden in ſehr kleine Theilchen zertrennen, die ſich <lb/>oben mit einander vereinigen, und in ſchwerern Tropfen, <lb/>wie ein Platzregen, herabfallen werden.</s>
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5404 <s xml:id="echoid-s2752" xml:space="preserve"/>
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5405 </p>
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5406 </div>
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5407 <div xml:id="echoid-div242" type="section" level="1" n="234">
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5408 <head xml:id="echoid-head256" xml:space="preserve">Vierzehntes Capitel.</head>
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5409 <head xml:id="echoid-head257" xml:space="preserve">Vom elektriſchen Lichte im luftleeren Raume.</head>
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5410 <head xml:id="echoid-head258" xml:space="preserve">193. Verſuch.</head>
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5411 <p>
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5412 <s xml:id="echoid-s2753" xml:space="preserve">Man nehme eine hohe trockne gläſerne Glocke, kütte in <lb/>den obern Theil derſelben einen Drath mit einem <lb/>abgerundeten Knopfe ein, ziehe die Luft aus der Glocke, <lb/>und halte den Knopf des Draths gegen einen Conductor,
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5413 <pb o="183" file="0203" n="203" rhead="Elektriſches Licht im luftleeren Raume."/>
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5414 ſo wird jeder Funken in Geſtalt eines breiten Lichtſtroms <lb/>durch den luftleeren Raum gehen, und längſt der ganzen <lb/>Glocke ſichtbar ſeyn. </s>
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5415 <s xml:id="echoid-s2754" xml:space="preserve">Oft trennet ſich der Strom in meh-<lb/>rere Aeſte vom ſchönſten Anſehen, die ſich auf eine höchſt <lb/>angenehme Art theilen und wieder vereinigen. </s>
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5416 <s xml:id="echoid-s2755" xml:space="preserve">Legt man <lb/>die Hand an die Glocke, ſo fühlt man bey jedem Funken <lb/>eine kleine Erſchütterung, wie einen Pulsſchlag, und das <lb/>Feuer lenkt ſich gegen die Hand. </s>
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5417 <s xml:id="echoid-s2756" xml:space="preserve">Dieſe Erſchütterung <lb/>fühlt man ſogar in einiger Entfernung von der Glocke, und <lb/>im Dunkeln ſieht man ein Licht zwiſchen der Hand und <lb/>dem Glaſe.</s>
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5418 <s xml:id="echoid-s2757" xml:space="preserve"/>
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5419 </p>
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5420 <p>
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5421 <s xml:id="echoid-s2758" xml:space="preserve">Vor einigen Jahren bemerkte Herr Wilſon bey <lb/>einigen mit einer vortreflichen Smeatonſchen Luftpum-<lb/>pe angeſtellten Verſuchen, daß die geringſten Verſchie-<lb/>denheiten der Luft einen ſehr beträchtlichen Unterſchied in <lb/>dem durch die Elektricität hervorgebrachten Lichte veran-<lb/>laſſeten; </s>
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5422 <s xml:id="echoid-s2759" xml:space="preserve">denn wenn alle Luft, welche die Pumpe auszu-<lb/>ziehen vermochte, aus der Glocke gezogen war, ſo zeigte <lb/>ſich im Dunkeln gar kein elektriſches Licht. </s>
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5423 <s xml:id="echoid-s2760" xml:space="preserve">Ließ man <lb/>durch einen Hahn ein wenig Luft hinzu, ſo erſchien ein <lb/>ſehr ſchwaches Licht, bey etwas mehr Luft verſtärkte ſich <lb/>daſſelbe, aber noch mehr Luft machte es wieder ſchwächer, <lb/>bis es zuletzt bey Hinzulaſſung vieler Luft völlig ver-<lb/>ſchwand. </s>
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5424 <s xml:id="echoid-s2761" xml:space="preserve">Aus dieſem Verſuche erhellet, daß zu Hervor-<lb/>bringung des ſtärkſten Leuchtens eine gewiſſe eingeſchränkte <lb/>Quantität Luſt nothwendig ſey.</s>
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5425 <s xml:id="echoid-s2762" xml:space="preserve"/>
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5426 </p>
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5427 </div>
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5428 <div xml:id="echoid-div243" type="section" level="1" n="235">
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5429 <head xml:id="echoid-head259" xml:space="preserve">194. Verſuch..</head>
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5430 <p>
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5431 <s xml:id="echoid-s2763" xml:space="preserve">Fig. </s>
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5432 <s xml:id="echoid-s2764" xml:space="preserve">82. </s>
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5433 <s xml:id="echoid-s2765" xml:space="preserve">ſtellt eine auf dem Teller der Luftpumpe <lb/>ſtehende luftleere Glocke vor, a b iſt der elektriſirte Drath, <lb/>der einen Strom elektriſcher Materie b c auf den Teller <lb/>der Luftpumpe herabſendet. </s>
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5434 <s xml:id="echoid-s2766" xml:space="preserve">Wenn die an der äußern <lb/>Seite der Glocke anliegende Luftſchicht durch Anlegung <lb/>des Fingers an die Glocke vermindert, und dadurch der <lb/>elektriſchen Materie auf der äußern Seite Veranlaſſung <lb/>gegeben wird, heraus zu gehen, ſo wird die innere Mate-
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5435 <pb o="184" file="0204" n="204" rhead="Vierzehntes Capitel."/>
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5436 rie gegen dieſe Stelle getrieben, wie bey d e f. </s>
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5437 <s xml:id="echoid-s2767" xml:space="preserve">Man hat <lb/>aus dieſem Verſuche ſchließen wollen, daß zwiſchen den <lb/>Theilchen der elektriſchen Materie keine zurückſtoßende <lb/>Kraft ſtatt finde; </s>
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5438 <s xml:id="echoid-s2768" xml:space="preserve">weil ſie allem Anſehen nach, wenn ſie <lb/>an ſich ſelbſt elaſtiſch, oder mit einer repellirenden Kraft <lb/>ihrer Theile gegen einander verſehen wäre, nach wegge-<lb/>nommenem Widerſtande nicht in einem ununterbrochenen <lb/>Strome fortfließen könnte, wie bey b c; </s>
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5439 <s xml:id="echoid-s2769" xml:space="preserve">ſondern ſich durch <lb/>ihre Elaſticität nach allen Seiten ausbreiten müßte.</s>
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5440 <s xml:id="echoid-s2770" xml:space="preserve"/>
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5441 </p>
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5442 <p>
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5443 <s xml:id="echoid-s2771" xml:space="preserve">D. </s>
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5444 <s xml:id="echoid-s2772" xml:space="preserve">Watſon ſagt, es ſey wahrſcheinlicher, anzu-<lb/>nehmen, daß die Repulſion der Theilchen, welche man in <lb/>freyer Luft wahrnimmt, von dem Widerſtande der Luft, <lb/>und nicht von einem natürlichen Beſtreben der Elektricität <lb/>ſelbſt, herrühre.</s>
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5445 <s xml:id="echoid-s2773" xml:space="preserve"/>
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5446 </p>
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5447 <p>
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5448 <s xml:id="echoid-s2774" xml:space="preserve">Folgender Verſuch des Beccaria giebt einen deut-<lb/>lichen Begriff von dem Widerſtande, den die Luft dem <lb/>Durchgange der elektriſchen Materie entgegenſetzt, und <lb/>von der Verminderung dieſes Widerſtandes in der luft-<lb/>leeren Glocke.</s>
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5449 <s xml:id="echoid-s2775" xml:space="preserve"/>
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5450 </p>
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5451 </div>
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5452 <div xml:id="echoid-div244" type="section" level="1" n="236">
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5453 <head xml:id="echoid-head260" xml:space="preserve">195. Verſuch.</head>
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5454 <p>
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5455 <s xml:id="echoid-s2776" xml:space="preserve">Ehe die Luft aus der Glocke ausgezogen war, gieng <lb/>aus dem an ihrem obern Theile befindlichen elektriſirten <lb/>Drathe ein divergirender Stralenbüſchel hervor, der ohn-<lb/>gefähr einen Zoll lang war. </s>
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5456 <s xml:id="echoid-s2777" xml:space="preserve">Zog man nun die Luft aus <lb/>der Glocke, ſo zeigten ſich folgende Veränderungen. </s>
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5457 <s xml:id="echoid-s2778" xml:space="preserve">Zu-<lb/>erſt wurden die Stralen des Büſchels länger; </s>
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5458 <s xml:id="echoid-s2779" xml:space="preserve">hierauf <lb/>divergirten ſie weniger, ihre Anzahl verminderte ſich, und <lb/>die übrigbleibenden Stralen wurden größer; </s>
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5459 <s xml:id="echoid-s2780" xml:space="preserve">endlich ver-<lb/>einigten ſie ſich alle mit einander, und bildeten eine unun-<lb/>terbrochene Lichtſäule, welche von dem Drathe bis in den <lb/>Teller der Luftpumpe übergieng.</s>
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5460 <s xml:id="echoid-s2781" xml:space="preserve"/>
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5461 </p>
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5462 <p>
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5463 <s xml:id="echoid-s2782" xml:space="preserve">Aus dieſem Verſuche iſt klar, daß die Luft das Mit-<lb/>tel ſey, wodurch wir mit Hülfe anderer idioelektriſcher Kör-<lb/>per im Stande ſind, die Elektricität ſowohl den elektri-<lb/>ſchen Körpern, als den Leitern mitzutheilen; </s>
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5464 <s xml:id="echoid-s2783" xml:space="preserve">denn wenn
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5465 <pb o="185" file="0205" n="205" rhead="Elektriſches Licht im luftleeren Raume"/>
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5466 man die Luft wegnimmt, ſo geht die elektriſche Materie <lb/>durch den leeren Raum, und verbreitet ſich bis auf die <lb/>entfernteſten Weiten.</s>
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5467 <s xml:id="echoid-s2784" xml:space="preserve"/>
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5468 </p>
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5469 </div>
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5470 <div xml:id="echoid-div245" type="section" level="1" n="237">
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5471 <head xml:id="echoid-head261" xml:space="preserve">196. Verſuch.</head>
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5472 <p>
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5473 <s xml:id="echoid-s2785" xml:space="preserve">Um die Veränderungen der Geſtalt und Länge des <lb/>elektriſchen Funkens, wenn er durch eine Glocke geht, in <lb/>der die Luft mehr oder weniger verdünnt iſt, ſehr genau <lb/>zu unterſcheiden, befeſtige man eine Kugel an den Drath, <lb/>und laſſe eine andere von dem Teller der Luftpumpe her-<lb/>vorgehen ſo, daß beyde etwa einen Zoll weit aus einander <lb/>ſtehen. </s>
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5474 <s xml:id="echoid-s2786" xml:space="preserve">Wenn das Vacuum gut iſt, ſo geht ein einziger <lb/>einförmiger purpurfarbner Stral von einer Kugel <lb/>zur andern; </s>
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5475 <s xml:id="echoid-s2787" xml:space="preserve">je mehr man aber Luft hinzuläßt, deſto mehr <lb/>erhält der Stral eine zitternde Bewegung, welche zeigt, <lb/>daß ſeine Bewegung nunmehr anfange, Widerſtand zu <lb/>finden, hierauf folgt eine Theilung des Strales oder <lb/>Stroms, das Licht wird lebhafter, und verwandlet ſich <lb/>endlich in den gewöhnlichen Funken, welcher mit mehr <lb/>oder weniger Leichtigkeit ausgeht, je nachdem die Kraft <lb/>der Maſchine und der Widerſtand der Luft größer iſt.</s>
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5476 <s xml:id="echoid-s2788" xml:space="preserve"/>
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5477 </p>
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5478 </div>
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5479 <div xml:id="echoid-div246" type="section" level="1" n="238">
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5480 <head xml:id="echoid-head262" xml:space="preserve">197. Verſuch.</head>
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5481 <p>
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5482 <s xml:id="echoid-s2789" xml:space="preserve">Man bringe an den Conductor eine dünne luftleere <lb/>Flaſche, wie die Fig. </s>
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5483 <s xml:id="echoid-s2790" xml:space="preserve">49. </s>
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5484 <s xml:id="echoid-s2791" xml:space="preserve">vorgeſtellte, aber ohne alle Be-<lb/>legung an der äußern Seite, ſo wird ſie von einem Ende <lb/>bis zum andern leuchten, und noch, wenn man ſie von <lb/>dem Conductor wegnimmt, zu leuchten fortfahren; </s>
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5485 <s xml:id="echoid-s2792" xml:space="preserve">das <lb/>Licht wird ſich eine lange Zeit nach krummlinigten Rich-<lb/>tungen bewegen, und von Zeit zu Zeit gleich dem Nord-<lb/>lichte blitzen. </s>
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5486 <s xml:id="echoid-s2793" xml:space="preserve">Man kann das Licht von neuem wieder be-<lb/>leben, wenn man mit der Hand über das Glas fährt. </s>
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5487 <s xml:id="echoid-s2794" xml:space="preserve">In <lb/>dieſem Verſuche hört und fühlt man das Schlagen der <lb/>elektriſchen Materie gegen das Glas ſehr deutlich.</s>
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5488 <s xml:id="echoid-s2795" xml:space="preserve"/>
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5489 </p>
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5490 <p>
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5491 <s xml:id="echoid-s2796" xml:space="preserve">Man kann die krummlinigten Bewegungen der elek-<lb/>triſchen Materie in einer luftleeren Glocke gewiſſermaßen <lb/>nach Gefallen hervorbringen. </s>
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5492 <s xml:id="echoid-s2797" xml:space="preserve">Wenn man die äußere
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5493 <pb o="186" file="0206" n="206" rhead="Vierzehntes Capitel."/>
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5494 Seite der Glocke befeuchtet, ſo folgt das Feuer der Rich-<lb/>tung der befeuchteten Linien, weil daſelbſt der Widerſtand <lb/>auf einer Seite geſchwächet wird; </s>
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5495 <s xml:id="echoid-s2798" xml:space="preserve">es kann ſich nämlich <lb/>die elektriſche Materie an der innern Seite anhäufen und <lb/>anhängen, weil andre Materie vermittelſt der Feuchtigkeit <lb/>aus der äußern Seite herausgetrieben wird.</s>
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5496 <s xml:id="echoid-s2799" xml:space="preserve"/>
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5497 </p>
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5498 <p>
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5499 <s xml:id="echoid-s2800" xml:space="preserve">Dieſer Verſuch fällt ſehr angenehm aus, wenn man <lb/>die Torricelliſche Leere in einer Z Schuh langen Glasröhre <lb/>hervorbringt, und alsdann dieſelbe hermetiſch ver-<lb/>ſchließt. </s>
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5500 <s xml:id="echoid-s2801" xml:space="preserve">Hält man das eine Ende dieſer Röhre in der <lb/>Hand, und bringt das andere an den Conductor, ſo wird <lb/>die ganze Röhre von einem Ende bis zum andern erleuch-<lb/>tet, und bleibt dies auch noch eine ziemliche Zeit, wenn <lb/>ſie gleich vom Conductor weggenommen wird; </s>
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5501 <s xml:id="echoid-s2802" xml:space="preserve">ſie leuchtet <lb/>blickweiſe oft noch viele Stunden lang.</s>
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5502 <s xml:id="echoid-s2803" xml:space="preserve"/>
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5503 </p>
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5504 </div>
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5505 <div xml:id="echoid-div247" type="section" level="1" n="239">
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5506 <head xml:id="echoid-head263" xml:space="preserve">198. Verſuch.</head>
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5507 <p>
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5508 <s xml:id="echoid-s2804" xml:space="preserve">Ein anderes ſehr ſchönes Schauſpiel kann man im <lb/>Dunkeln hervorbringen, wenn man eine kleine leidner Fla-<lb/>ſche in den Hals einer hohen gläſernen Glocke bringt, ſo <lb/>daß die äußere Belegung im Vacuum ſteht. </s>
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5509 <s xml:id="echoid-s2805" xml:space="preserve">Zieht man <lb/>die Luft aus der Glocke, und ladet die Flaſche, ſo wird <lb/>bey jedem Funken, der aus dem Conductor in die innere <lb/>Seite übergeht, ein Licht von allen Punkten der äußern <lb/>Fläche ausgehen, und die ganze Glocke auszufüllen ſchei-<lb/>nen. </s>
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5510 <s xml:id="echoid-s2806" xml:space="preserve">Entladet man wieder, ſo kehrt das Licht in Geſtalt <lb/>eines compakten Funkens zurück.</s>
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5511 <s xml:id="echoid-s2807" xml:space="preserve"/>
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5512 </p>
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5513 </div>
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5514 <div xml:id="echoid-div248" type="section" level="1" n="240">
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5515 <head xml:id="echoid-head264" xml:space="preserve">199. Verſuch.</head>
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5516 <p>
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5517 <s xml:id="echoid-s2808" xml:space="preserve">Eine zum Uebergange der elektriſchen Materie ſehr <lb/>geſchickte Leere kann man hervorbringen, wenn man ein <lb/>Doppelbarometer oder eine lange gebogne Glasröhre mit <lb/>Queckſilber füllet, und mit jedem Schenkel in einem Ge-<lb/>fäß mit Queckſilber ſtehend umkehret, wobey der gebog-<lb/>ne Theil der Röhre über dem Queckſilber ein vollkommnes <lb/>Vacuum wird. </s>
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5518 <s xml:id="echoid-s2809" xml:space="preserve">Entladet man eine Flaſche durch dieſen
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5519 <pb o="187" file="0207" n="207" rhead="Elektriſches Licht im luftleeren Raume."/>
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5520 Raum, ſo erſcheint ein durchaus gleichförmiges Licht, deſto <lb/>lebhafter, je ſtärker der Schlag iſt. </s>
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5521 <s xml:id="echoid-s2810" xml:space="preserve">D. </s>
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5522 <s xml:id="echoid-s2811" xml:space="preserve">Watſon iſo-<lb/>lirte dieſe Zubereitung, brachte das eine Gefäß mit Queck-<lb/>ſilber mit dem Conductor in Berührung, und berührte <lb/>das andere mit einem Leiter; </s>
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5523 <s xml:id="echoid-s2812" xml:space="preserve">ſo gieng die elektriſche Ma-<lb/>terie in einer ununterbrochenen Flamme durch den leeren <lb/>Raum, ohne die geringſte Divergenz: </s>
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5524 <s xml:id="echoid-s2813" xml:space="preserve">ward das eine <lb/>Gefäß mit dem iſolirten Küſſen verbunden, ſo ſahe man <lb/>das Feuer nach der entgegengeſetzten Richtung durch das <lb/>Vacuum gehen.</s>
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5525 <s xml:id="echoid-s2814" xml:space="preserve"/>
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5526 </p>
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5527 </div>
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5528 <div xml:id="echoid-div249" type="section" level="1" n="241">
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5529 <head xml:id="echoid-head265" xml:space="preserve">200. Verſuch.</head>
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5530 <p>
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5531 <s xml:id="echoid-s2815" xml:space="preserve">Fig. </s>
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5532 <s xml:id="echoid-s2816" xml:space="preserve">83. </s>
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5533 <s xml:id="echoid-s2817" xml:space="preserve">iſt eine Glasröhre, wie man ſie gewöhn-<lb/>lich zu den Barometern gebraucht: </s>
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5534 <s xml:id="echoid-s2818" xml:space="preserve">am Ende b iſt ſie in <lb/>eine ſtählerne Haube geküttet, aus welcher ein eiſerner <lb/>Drath mit einem Knopfe c d in die Röhre herabgeht. <lb/></s>
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5535 <s xml:id="echoid-s2819" xml:space="preserve">Man fülle dieſe Röhre mit Queckſilber, laſſe zu wieder-<lb/>holten mahlen eine Luftblaſe hinein, kehre dann die Röhre <lb/>um, und befreye dadurch das Queckſilber und den eiſernen <lb/>Drath von aller daran hängenden Luft, nach der gewöhn-<lb/>lichen Art, Barometer zu füllen. </s>
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5536 <s xml:id="echoid-s2820" xml:space="preserve">Hierauf laſſe man ei-<lb/>nen kleinen Tropfen Aether auf das Queckſilber fallen, <lb/>halte den Finger auf die Oefnung der Glasrohre, kehre <lb/>die Röhre um, und bringe das Ende f in ein Gefäß mit <lb/>Queckſilber, nehme aber den Finger nicht eher weg, als <lb/>bis das Ende der Röhre einen halben Zall tief unter dem <lb/>Queckſilber ſteht. </s>
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5537 <s xml:id="echoid-s2821" xml:space="preserve">Nimmt man nun den Finger weg, ſo <lb/>fällt das Queckſilber, der Aether breitet ſich aus, vermin-<lb/>dert das Vacuum, und drückt das Queckſilber in der Röh-<lb/>re tiefer herab. </s>
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5538 <s xml:id="echoid-s2822" xml:space="preserve">Bringt man nun die metallene Haube <lb/>der Röhre gegen einen großen geladenen Conductor, ſo <lb/>wird man einen ſchönen grünen Funken von der Kugel <lb/>bis ans Queckſilber gehen ſehen. </s>
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5539 <s xml:id="echoid-s2823" xml:space="preserve">Läßt man etwas Luft in <lb/>den leeren Raum, ſo zeigt ſich eine den Sternſchnuppen <lb/>ähnliche Erſcheinung. </s>
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5540 <s xml:id="echoid-s2824" xml:space="preserve">Dieſen ſchönen Verſuch habe ich <lb/>durch Herrn Morgan kennen gelernt.</s>
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5541 <s xml:id="echoid-s2825" xml:space="preserve"/>
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5542 </p>
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5543 <pb o="188" file="0208" n="208" rhead="Funfzehntes Capitel."/>
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5544 <p>
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5545 <s xml:id="echoid-s2826" xml:space="preserve">Mehrere Beobachtungen über die Erſcheinungen des <lb/>elektriſchen Lichts im luftleeren Raume kann man ver-<lb/>mittelſt des 110ten 111ten 119ten und 120ſten Ver-<lb/>ſuchs anſtellen.</s>
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5546 <s xml:id="echoid-s2827" xml:space="preserve"/>
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5547 </p>
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5548 </div>
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5549 <div xml:id="echoid-div250" type="section" level="1" n="242">
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5550 <head xml:id="echoid-head266" xml:space="preserve">Funfzehntes Capitel.</head>
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5551 <head xml:id="echoid-head267" xml:space="preserve">Von der mediciniſchen Elektricität.</head>
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5552 <p>
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5553 <s xml:id="echoid-s2828" xml:space="preserve">Der Abt Nollet verſichert, er habe über keine ſeiner <lb/>Erfindungen mehr Vergnügen empfunden, als <lb/>über die Entdeckung, daß die Bewegung flüſſiger Mate-<lb/>rien durch Haarröhren, und die unmerkliche Ausdünſtung <lb/>thieriſcher Körper durch die Elektricität verſtärkt werde; <lb/></s>
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5554 <s xml:id="echoid-s2829" xml:space="preserve">weil ihm dieſe Entdeckung, bey gehöriger Anwendung durch <lb/>geſchickte Männer ſo ungemeine Vortheile für die menſch-<lb/>liche Geſellſchaſt verſprochen habe. </s>
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5555 <s xml:id="echoid-s2830" xml:space="preserve">Aber um wie viel <lb/>größer würde ſein Vergnügen geweſen ſeyn, wenn er die <lb/>Erfüllung dieſer Hoſnung erlebt, und geſehen hätte, wie <lb/>dieſer Zweig der Elektricität faſt eben ſoviel mediciniſche <lb/>Zuverläſſigkeit erreicht hat, als der Gebrauch der China-<lb/>rinde bey Wechſelfiebern.</s>
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5556 <s xml:id="echoid-s2831" xml:space="preserve"/>
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5557 </p>
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5558 <p>
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5559 <s xml:id="echoid-s2832" xml:space="preserve">Zwar ſind auch der Elektricität, ſo wie allen andern <lb/>für die Menſchheit wohlthätigen einfachen Arzneymitteln, <lb/>theils aus eigennützigen Abſichten, theils aus Unwiſſenheit, <lb/>viele Hinderniſſe in den Weg gelegt worden; </s>
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5560 <s xml:id="echoid-s2833" xml:space="preserve">man hat ſie <lb/>verächtlich behandelt, und mit übelangebrachter Vorſichtig-<lb/>keit herabgeſetzt. </s>
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5561 <s xml:id="echoid-s2834" xml:space="preserve">Man muß aber denen, welche ſich ihr <lb/>auf dieſe Art entgegenſetzen, anempfehlen, eine Sache <lb/>nicht zu verdammen, die ſie nicht kennen, und ſie nicht <lb/>ung@hört zu verurtheilen; </s>
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5562 <s xml:id="echoid-s2835" xml:space="preserve">vielmehr ſich um einige Kennt-<lb/>niß von der Natur der Elektricität zu bemühen, die Elek-<lb/>triſirmaſchine auf eine wirkſame Art gebrauchen zu lernen, <lb/>und ſie dann nur einige Wochen lang bey den Krankheiten <lb/>anzuwenden, in welchen ſie die beſten Dienſte thut. </s>
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5563 <s xml:id="echoid-s2836" xml:space="preserve">Auf
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5564 <pb o="189" file="0209" n="209" rhead="Mediciniſche Elektricität."/>
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5565 dieſe Art würden ſie ohne Zweifel bald überzeugt werden, <lb/>daß die Elektricität unter den Arzneymitteln einen ausge-<lb/>zeichneten Rang behaupte.</s>
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5566 <s xml:id="echoid-s2837" xml:space="preserve"/>
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5567 </p>
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5568 <p>
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5569 <s xml:id="echoid-s2838" xml:space="preserve">Man hat der Arzneywiſſenſchaft und den praktiſchen <lb/>Aerzten den Vorwurf der Unbeſtändigkeit und Veränder-<lb/>lichkeit in der Praxis gemacht, die einmal kalt wie das Eis <lb/>in Novazembla, ein andermal heiß wie die hitzige Zone <lb/>ſey; </s>
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5570 <s xml:id="echoid-s2839" xml:space="preserve">man hat ſie beſchuldiget, daß ſie ſich von der Mode <lb/>leiten und von Vorurtheilen beherrſchen ließen. </s>
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5571 <s xml:id="echoid-s2840" xml:space="preserve">Aus die-<lb/>ſem Grunde hat man vorherſagen wollen, ſo vortheilhaft <lb/>auch der Gebrauch der Elektricität ſeyn möge, ſo werde <lb/>man ſie doch nur für die Zeit der Mode beybehalten, und <lb/>dann der Vergeſſenheit überlaſſen. </s>
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5572 <s xml:id="echoid-s2841" xml:space="preserve">Ich kann aber dieſer <lb/>Meinung nicht beypflichten, und mich nicht verleiten laſ-<lb/>ſen zu glauben, daß eine Claſſe von Männern, deren Ur-<lb/>theilskraft durch Wiſſenſchaften und Erfahrung geſchärft <lb/>iſt, eine Kraft ganz vernachläſſigen werde, welche allem <lb/>Anſehen nach den wichtigſten Theil der Conſtitution des <lb/>Körpers ausmacht. </s>
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5573 <s xml:id="echoid-s2842" xml:space="preserve">Die Elektricität iſt ein wirkendes <lb/>Principium, das nie erzeugt und nie zerſtört wird, das <lb/>überall und allezeit anzutreffen iſt, wenn es auch gleich <lb/>verborgen und unmerklich bleibt, das ſich zu jeder Zeit <lb/>bewegt, um ein ſtets veränderliches Gleichgewicht zu be-<lb/>haupten. </s>
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5574 <s xml:id="echoid-s2843" xml:space="preserve">Um nur ein einziges Beyſpiel aus vielen an-<lb/>dern auszuheben, ſo iſt der Regen, der bey Gewittern <lb/>herabfällt, ſtark mit der Elektricität imprägnirt, und <lb/>bringt auf dieſe Art dasjenige herab, was die erhitzten <lb/>Dämpfe in die Luft hinaufgeführt haben, bis der Mangel <lb/>in der Erde durch den im Himmel befindlichen Ueberfluß <lb/>wieder erſetzt und aufgehoben iſt. </s>
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5575 <s xml:id="echoid-s2844" xml:space="preserve">Unaufhörlich verbin-<lb/>den ſich mancherley Urſachen, um das Gleichgewicht dieſer <lb/>Materie zu ändern, woraus die beſtändige innere Bewe-<lb/>gung entſteht, welche ſoviel zur Ausführung der Natur-<lb/>begebenheiten beyträgt. </s>
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5576 <s xml:id="echoid-s2845" xml:space="preserve">Wenn ferner durch eine jede <lb/>Subſtanz eine gewiſſe ihr eigenthümliche Portion dieſer <lb/>Materie vertheilt iſt, ſo muß jede Veränderung ihrer Ca-
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5577 <pb o="190" file="0210" n="210" rhead="Funfzehntes Capitel."/>
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5578 pacität, welche ſich durch Hitze und Kälte beſtändig ver-<lb/>ändert, ſie bewegen und auf ſie wirken.</s>
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5579 <s xml:id="echoid-s2846" xml:space="preserve"/>
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5580 </p>
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5581 <p>
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5582 <s xml:id="echoid-s2847" xml:space="preserve">Da die Wärme oder die Bewegung des Feuers das <lb/>erſte Triebrad in der thieriſchen Maſchine iſt, und ſo lange <lb/>dieſe Maſchine dauert, das Hauptprincipium ihrer Erhal-<lb/>tung ausmacht, da ferner die Elektricität ſo viele Erſchei-<lb/>nungen zeigt, welche man von den Phänomenen des Feu-<lb/>ers gar nicht unterſcheiden kann, ſo müſſen wir uns noth-<lb/>wendig eine große Vorſtellung von der Wichtigkeit der <lb/>elektriſchen Materie für die Medicin machen. </s>
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5583 <s xml:id="echoid-s2848" xml:space="preserve">Doch kann <lb/>man, allgemein genommen, die Stärke der Lebenskräfte <lb/>nicht nach dem Grade der Wärme beurtheilen, weil der <lb/>Grad der Wärme bloß eine gewiſſe Menge derſelben be-<lb/>ſtimmt, welche auf eine beſondere Art wirket.</s>
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5584 <s xml:id="echoid-s2849" xml:space="preserve"/>
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5585 </p>
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5586 <p>
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5587 <s xml:id="echoid-s2850" xml:space="preserve">Es iſt bekannt, daß dieſes belebende Principium auch <lb/>das Wachsthum der Pflanzen beſchleuniget. </s>
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5588 <s xml:id="echoid-s2851" xml:space="preserve">Elektriſirte <lb/>Myrthen blühten eher, als andere von eben derſelben Art <lb/>und Größe in eben demſelben Gewächshauſe. </s>
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5589 <s xml:id="echoid-s2852" xml:space="preserve">Täglich <lb/>elektriſirte Saamen ſind in drey bis vier Tagen beſſer auf-<lb/>gegangen und gewachſen, als andere von eben derſelben <lb/>Art und unter übrigens vollkommen gleichen Umſtänden in <lb/>eilf bis zwölf Tagen. </s>
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5590 <s xml:id="echoid-s2853" xml:space="preserve">Eben ſo hat Herr Achard gezeigt, <lb/>daß man die Elektricität an ſtatt der Wärme zu Beſchleu-<lb/>nigung des Auslaufens der Eyer gebrauchen könne. </s>
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5591 <s xml:id="echoid-s2854" xml:space="preserve">Die <lb/>Vermuthung eines ſcharfſinnigen Schriftſtellers iſt gar <lb/>nicht unwahrſcheinlich, daß die vegetirende Kraft, welche <lb/>in den immergrünenden Bäumen und Pflanzen das ganze <lb/>Iahr hindurch wirkt, davon herrühre, weil dieſe Bäume <lb/>mehr Harz enthalten, als diejenigen, deren Blätter im <lb/>Herbſte abfallen, und daß ſie dadurch in den Stand ge-<lb/>ſetzt werden, die Säfte, welche ihre beſtändige Vegetation <lb/>unterhaiten, an ſich zu ziehen und zu behalten, wodurch <lb/>der Mangel der Sonnenwärme einigermaſſen erſetzt wird. <lb/></s>
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5592 <s xml:id="echoid-s2855" xml:space="preserve">Man kann dieſes aus ihren natürlichen Eigenſchaften <lb/>ſchließen, und die ſtarke elektriſche Kraft ihrer Blätter <lb/>beſtätiget es. </s>
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5593 <s xml:id="echoid-s2856" xml:space="preserve">Eben dieſer Schriftſteller glaubt, das bey
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5594 <pb o="191" file="0211" n="211" rhead="Mediciniſche Elektricität."/>
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5595 unſern Verſuchen geſammlete elekteiſche Fluidum beſtehe <lb/>bloß aus den Sonnenſtralen, welche von der Erde aufge-<lb/>fangen und zurückbehalten worden wären; </s>
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5596 <s xml:id="echoid-s2857" xml:space="preserve">welcher Ge-<lb/>danke auch durch die Beobachtungen über die atmoſphäri-<lb/>ſche Elektricität, und durch verſchiedene aus der Verwand-<lb/>ſchaft zwiſchen Feuer, Licht und Wärme gezogne Schlüſſe <lb/>beſtätiget wird.</s>
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5597 <s xml:id="echoid-s2858" xml:space="preserve"/>
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5598 </p>
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5599 <p>
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5600 <s xml:id="echoid-s2859" xml:space="preserve">Das Daſeyn und die Wirkſamkeit dieſer Materie in <lb/>den thieriſchen Körpern iſt durch die Verſuche über den <lb/>Zitteraal und Zitterfiſch vollkommen erwieſen worden; <lb/></s>
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5601 <s xml:id="echoid-s2860" xml:space="preserve">denn die Aehnlichkeit zwiſchen der Elektricität des Zitter-<lb/>fiſches und derjenigen, die man in der Natur im Großen <lb/>antrift, iſt ſo groß, daß man in phyſikaliſchem Sinne <lb/>beyde für einerley halten kann. </s>
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5602 <s xml:id="echoid-s2861" xml:space="preserve">Herr Hunter hat ſehr <lb/>richtig bemerkt <anchor type="note" xlink:href="" symbol="*)"/>, daß die Größe und Menge der Ner-
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5603 ven, welche ſich in den elektriſchen Organen des Zitterfi-<lb/>ſches befinden, im Vergleich mit der Größe dieſer Organe <lb/>ſelbſt, eben ſo außerordentlich ſcheinen muß, als ihre <lb/>Wirkungen, und daß es, wenn wir die ſinnlichen Organe <lb/>des menſchlichen Körpers ausnehmen, in keinem Thiere, <lb/>ſelbſt in den vollkommenſten, irgend einen Theil gebe, der <lb/>ſo häufig mit Nerven verſehen ſey, als der Zitterfiſch. <lb/></s>
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5604 <s xml:id="echoid-s2862" xml:space="preserve">Dennoch ſcheinen dieſe Nerven ſeiner elektriſchen Organe <lb/>zu keiner Empfindung, welche in dieſelben eindringen <lb/>könnte, nothwendig zu ſeyn; </s>
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5605 <s xml:id="echoid-s2863" xml:space="preserve">und was die Kraft betrift, <lb/>ſo bemerkt Herr Hunter ebenfalls, daß es keinen Theil <lb/>in irgend einem Thiere gebe, ſo ſtark und anhaltend auch <lb/>die Kraft deſſelben ſeyn möge, der eine ſo große Menge <lb/>Nerven enthalte. </s>
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5606 <s xml:id="echoid-s2864" xml:space="preserve">Da es alſo wahrſcheinlich iſt, daß dieſe <lb/>Nerven weder zur Empſindung noch zur Bewegung die-<lb/>nen, müſſen wir nicht vermuthen, daß ſie die Hervor-<lb/>bringung, Aufſammlung und Behandlung der elektriſchen <lb/>Materie zur Abſicht haben, beſonders, da nach den Ver-<lb/>ſuchen des Hn. </s>
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5607 <s xml:id="echoid-s2865" xml:space="preserve">Walſy die elektriſchen Wirkungen dieſer <lb/>
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5608 <anchor type="note" xlink:label="note-0211-01a" xlink:href="note-0211-01"/>
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5609 <pb o="192" file="0212" n="212" rhead="Funfzehntes Capitel."/>
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5610 Organe von dem Willen des Thieres abhängen? </s>
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5611 <s xml:id="echoid-s2866" xml:space="preserve">Sind <lb/>dieſe Bemerkungen richtig, ſo können wir mit vieler Wahr-<lb/>ſcheinlichkeit vorausſagen, daß von den künftigen Natur-<lb/>forſchern keine Entdeckung von Wichtigkeit über die Natur <lb/>des Nervenſafts werde gemacht werden, bey welcher ſie <lb/>nicht werden eingeſtehen müſſen, daß ſie dieſelbe dem Lichte <lb/>zu danken haben, welches die Verſuche des Herrn Walſy <lb/>über den lebenden Zitterfiſch, und des Herrn Hunter Zer-<lb/>gliederungen des todten Fiſches über dieſe Materie ver, <lb/>breitet haben.</s>
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5612 <s xml:id="echoid-s2867" xml:space="preserve"/>
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5613 </p>
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5614 <div xml:id="echoid-div250" type="float" level="2" n="1">
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5615 <note symbol="*)" position="foot" xlink:label="note-0211-01" xlink:href="note-0211-01a" xml:space="preserve">Philoſ. Transact. Vol. LXIII. no. 40.</note>
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5616 </div>
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5617 <p>
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5618 <s xml:id="echoid-s2868" xml:space="preserve">Sehr diele merkwürdige Beobachtungen überzeugen <lb/>uns deutlich, daß die elektriſche Materie mit dem menſch-<lb/>lichen Körper in der genaueſten Verbindung ſtehe, und <lb/>ihren Einfluß auf denſelben unaufhörlich fortſetze. </s>
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5619 <s xml:id="echoid-s2869" xml:space="preserve">Herr <lb/>Brydone gedenkt einer Dame, welche bisweilen, wenn <lb/>ſie ſich bey kaltem Wetter im Dunkeln gekämmt, ſeurige <lb/>Funken aus ihrem Haare habe kommen ſehen; </s>
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5620 <s xml:id="echoid-s2870" xml:space="preserve">dies brachte <lb/>ihn auf den Gedanken, die elektriſche Materie bloß aus <lb/>den Haaren der Menſchen, ohne einige andere elektriſche <lb/>Geräthſchaft zu ſammlen. </s>
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5621 <s xml:id="echoid-s2871" xml:space="preserve">In dieſer Abſicht ließ er ein <lb/>junges Frauenzimmer auf Pech treten, und die Haare <lb/>ihrer Schweſter kämmen, die vor ihr auf einem Stuhle <lb/>ſaß; </s>
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5622 <s xml:id="echoid-s2872" xml:space="preserve">kaum hatte jene zu kämmen angefangen, ſo ward ihr <lb/>ganzer Körper elektriſirt, und warf gegen jeden Gegen-<lb/>ſtand, der ſich ihr näherte, Funken aus. </s>
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5623 <s xml:id="echoid-s2873" xml:space="preserve">Das Haar <lb/>war ſehr ſtark elektriſch, und wirkte in beträchtlicher Ent-<lb/>fernung auf das Elektrometer. </s>
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5624 <s xml:id="echoid-s2874" xml:space="preserve">Er lud einen metallnen <lb/>Conductor mit dieſer Elektricität, und ſammlete in wenig <lb/>Minuten ſoviel von derſelben, daß er Weingeiſt anzün-<lb/>den, und mit Hülfe einer kleinen Flaſche der ganzen Ge-<lb/>ſellſchaft mehrere ſtarke Schläge geben konnte.</s>
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5625 <s xml:id="echoid-s2875" xml:space="preserve"/>
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5626 </p>
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5627 <p>
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5628 <s xml:id="echoid-s2876" xml:space="preserve">Herr Cavallo erhielt vermittelſt eines kleinen Con-<lb/>denſators ſehr merkliche Zeichen der Elektricität aus der-<lb/>ſchiednen Theilen ſeines eignen Körpers, und aus den <lb/>Haupthaaren dieler andern Perſonen.</s>
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5629 <s xml:id="echoid-s2877" xml:space="preserve"/>
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5630 </p>
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5631 <pb o="193" file="0213" n="213" rhead="Mediciniſche Elektricität."/>
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5632 <p>
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5633 <s xml:id="echoid-s2878" xml:space="preserve">Wenn die Entdeckungen in dieſer Wiſſenſchaft, <lb/>ſagt Herr Btydone, höher ſteigen werden, ſo wer-<lb/>den wir vielleicht finden, daß die ſogenannten Nerden-<lb/>ſchwächen und andere Krankheiten, welche wir bloß dem <lb/>Namen nach kennen, davon herkommen, daß ſich in den <lb/>Körpern entweder zu viel oder zu wenig von dieſer feinen <lb/>Materie befindet, welche vielleicht das Vehiculum aller <lb/>unſerer Empfindungen iſt. </s>
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5634 <s xml:id="echoid-s2879" xml:space="preserve">Bekanntermaſſen wird bey <lb/>feuchtem und neblichen Wetter dieſe Materie von der <lb/>Feuchtigkeit geſchwächt und abſorbiret, ihre Wirkſamkeit <lb/>vermindert, und das, was man von ihr geſammlet hat, <lb/>bald zerſtreuet; </s>
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5635 <s xml:id="echoid-s2880" xml:space="preserve">alsdann ermatten unſere Lebenskräſte, und <lb/>unſer Gefühl wird ſtumpfer. </s>
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5636 <s xml:id="echoid-s2881" xml:space="preserve">Bey den ſchädlichen Win-<lb/>den in Neapel, wobey die Luſt aller elektriſchen Materie <lb/>beraubt zu ſeyn ſcheinet, wird der ganze Körper erſchlaffet, <lb/>und die Nerven ſcheinen ihre Spannung und Elaſticität <lb/>zu verlieren, bis der Nordweſtwind die belebende Kraft <lb/>wiederherſtellet, die dem Körper ſeine Spannung wie-<lb/>vergiebt, und die ganze in ihrer Abweſenheit ermattete <lb/>Natur wieder verjünget. </s>
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5637 <s xml:id="echoid-s2882" xml:space="preserve">Es iſt dies auch gar nicht zu <lb/>verwundern, da die Spannung und Erſchlaffung im <lb/>menſchlichen Körper von dem verſchiednen Zuſtande der <lb/>elektriſchen Materie, und nicht von einer Veränderung <lb/>ver Fibern ſelbſt, oder von einer Ausdehnung und Zu-<lb/>ſammenziehung derſelben herrührt. </s>
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5638 <s xml:id="echoid-s2883" xml:space="preserve">Man hat ſonſt der <lb/>Kälte eine ſolche zuſammenziehende Kraft zugeſchrieben, <lb/>obgleich die Muſkeln des thieriſchen Körpers mehr zuſam-<lb/>mengezogen werden, wenn ſie warm ſind, und in der <lb/>Kälte hingegen erſchlaffen.</s>
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5639 <s xml:id="echoid-s2884" xml:space="preserve"/>
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5640 </p>
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5641 <p>
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5642 <s xml:id="echoid-s2885" xml:space="preserve">Die Herren Iallabert und de Sauſſüre kamen <lb/>auf ihren Alpenreiſen in Gewitterwolken, und fanden da-<lb/>bey ihren ganzen Körper elektriſch. </s>
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5643 <s xml:id="echoid-s2886" xml:space="preserve">Aus ihren Fingern <lb/>ſtrömten freywillig Feuerſtralen mit einem kniſternden Ge-<lb/>räuſch, und ihre Empfindungen waren eben ſo, als ob ſie <lb/>durch Kunſt ſehr ſtark elektriſirek wären. </s>
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5644 <s xml:id="echoid-s2887" xml:space="preserve">Es fällt ſehr <lb/>deutlich in die Augen, daß dieſe Empfindungen von einem
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5645 <pb o="194" file="0214" n="214" rhead="Funfzehntes Kapitel."/>
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5646 allzugroßen Ueberfluß der elektriſchen Materie in ihren <lb/>Körpern herkamen; </s>
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5647 <s xml:id="echoid-s2888" xml:space="preserve">daher iſt es ſeht wahrſcheinlich, daß <lb/>viele Kranken ihre Empſindungen der entgegengeſetzten <lb/>Urſache zuzuſchreiben haben.</s>
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5648 <s xml:id="echoid-s2889" xml:space="preserve"/>
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5649 </p>
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5650 </div>
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5651 <div xml:id="echoid-div252" type="section" level="1" n="243">
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5652 <head xml:id="echoid-head268" xml:space="preserve">201. Verſuch.</head>
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5653 <p>
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5654 <s xml:id="echoid-s2890" xml:space="preserve">Man laſſe den Schlag einer großen geladenen Fla-<lb/>ſche oder einer Batterie durch den Kopf und Rücken einer <lb/>Maus gehen, ſo wird er, wenn er ſtark genug iſt, das <lb/>Thier tödten. </s>
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5655 <s xml:id="echoid-s2891" xml:space="preserve">Wenn es todt iſt, wiederhohle man den <lb/>Verſuch, ſo wird die elektriſche Materie augenſcheinlich <lb/>über den Körper hinweg, und nicht durch denſelben gehen, <lb/>woraus erhellet, daß die Kraft oder das Mittel, welches <lb/>den Schlag durch den Körper des Thieres leitete, mit <lb/>dem Leben deſſelben verlohren gegangen ſey. </s>
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5656 <s xml:id="echoid-s2892" xml:space="preserve">Dieſer Ver-<lb/>ſuch iſt aus des Herrn Cavallo Abhandlung von der me-<lb/>diciniſchen Elektricität <anchor type="note" xlink:href="" symbol="*)"/> genommen. </s>
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5657 <s xml:id="echoid-s2893" xml:space="preserve">Seine Wichtig-
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5658 keit fällt in die Augen, und er vervient ohne Zweifel von <lb/>Männern, welche ſowohl mit der thieriſchen Oekonomie, <lb/>als mit der Elektricität bekannt ſind, weiter unterſucht zu <lb/>werden.</s>
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5659 <s xml:id="echoid-s2894" xml:space="preserve"/>
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5660 </p>
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5661 <p>
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5662 <s xml:id="echoid-s2895" xml:space="preserve">Der folgende Verſuch zeigt, daß die elektriſche Ma-<lb/>terie durch diejenige Reihe von Muſkeln gehe, welche ihr <lb/>den kürzeſten Weg darbietet, und deren leitende Kraft <lb/>oder elektriſche Capacität ihr am vortheilhafteſten iſt.</s>
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5663 <s xml:id="echoid-s2896" xml:space="preserve"/>
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5664 </p>
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5665 </div>
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5666 <div xml:id="echoid-div253" type="section" level="1" n="244">
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5667 <head xml:id="echoid-head269" xml:space="preserve">202. Verſuch.</head>
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5668 <p>
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5669 <s xml:id="echoid-s2897" xml:space="preserve">Man laſſe die Perſon A in ihrer rechten Hand <lb/>eine leidner Flaſche halten, und mit einem in der linken <lb/>Hand gehaltenen meſſingenen Stabe den entblößten rech-<lb/>ten Fuß von B berühren; </s>
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5670 <s xml:id="echoid-s2898" xml:space="preserve">der linke Fuß von B ſey durch <lb/>einen meſſingenen Stab mit dem rechten Fuße von C ver-<lb/>
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5671 <anchor type="note" xlink:label="note-0214-01a" xlink:href="note-0214-01"/>
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5672 <pb o="195" file="0215" n="215" rhead="Mediciniſche Elektricität."/>
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5673 bunden; </s>
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5674 <s xml:id="echoid-s2899" xml:space="preserve">D halte mit ſeiner rechten Hand das linke Ohr <lb/>von C, und berühre den Knopf der Flaſche mit der linken <lb/>Hand: </s>
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5675 <s xml:id="echoid-s2900" xml:space="preserve">ſo wird A den Schlag in den Muſkeln der rechten <lb/>Hand und des Arms, der Bruſt, und des linken Arms <lb/>fühlen; </s>
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5676 <s xml:id="echoid-s2901" xml:space="preserve">B in den Muſkeln des rechten und linken Fußes, <lb/>Schenkels und dicken Beins; </s>
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5677 <s xml:id="echoid-s2902" xml:space="preserve">C hingegen in derjenigen <lb/>Reihe von Muſkeln, welche vom Schenkel bis zum Ohre <lb/>gehen, durch welches er mit D verbunden iſt. </s>
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5678 <s xml:id="echoid-s2903" xml:space="preserve">Die Wir-<lb/>kung der elektriſchen Materie auf den menſchlichen Kör-<lb/>per beym Schlage iſt die nämliche, wenn er mit gleicher <lb/>Dichtigkeit durch ähnliche Theile geht. </s>
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5679 <s xml:id="echoid-s2904" xml:space="preserve">Sie iſt ſtärker, <lb/>wenn die Materie dichter iſt, und folglich am ſtärkſten, wenn <lb/>ſie Widerſtand antrift.</s>
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5680 <s xml:id="echoid-s2905" xml:space="preserve"/>
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5681 </p>
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5682 <div xml:id="echoid-div253" type="float" level="2" n="1">
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5683 <note symbol="*)" position="foot" xlink:label="note-0214-01" xlink:href="note-0214-01a" xml:space="preserve">Verſuch über die Theorie und Anwendung der medici-<lb/>niſchen Elektricität, von Tib. Cavallo, aus dem Engl. überſ. <lb/>Leipz. 1782. 8.</note>
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5684 </div>
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5685 <p>
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5686 <s xml:id="echoid-s2906" xml:space="preserve">Beccatia hat mit Hülfe eines Wundarztes verſchie-<lb/>dene Verſuche über die Wirkung der Elektricität auf die <lb/>Muſkeln im linken Beine eines Hahns gemacht. </s>
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5687 <s xml:id="echoid-s2907" xml:space="preserve">DieMuſkeln <lb/>wurden, wenn der Schlag hindurchgieng, ſtark zuſammenge-<lb/>zogen und dieſes Zuſammenziehen war allezeit mit einem <lb/>plötzlichen und proportionirten Aufſchwellen derſelben beglei-<lb/>tet, denjenigen Theil ausgenommen, wo das Häutchen, wel-<lb/>ches einen Muſkel von dem andern trennet, anliegt, welcher <lb/>Theil allezeit eingedrückt ward. </s>
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5688 <s xml:id="echoid-s2908" xml:space="preserve">Das Häutchen, welches den <lb/>Theil des Muſkels, durch welchen der Schlag gieng, be-<lb/>deckte, ward trocken und ſchrumpfte zuſammen, auch ſtieg <lb/>aus dieſem Theile ein Dampf auf; </s>
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5689 <s xml:id="echoid-s2909" xml:space="preserve">wenn ein Muſkel zu-<lb/>ſammengezogen ward, ſo äuſſerte ſich zugleich ein allge-<lb/>meines Zuſammenziehen in allen anliegenden Muſkeln, <lb/>und dieſelben blieben auch einige Zeit nach dem Schlage <lb/>in einer convulſiviſchen Bewegung.</s>
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5690 <s xml:id="echoid-s2910" xml:space="preserve"/>
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5691 </p>
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5692 <p>
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5693 <s xml:id="echoid-s2911" xml:space="preserve">Bey einem andern Verſuche, wo der Muſkel abge-<lb/>löſet und vom Beine loßgemacht worden war, zog ſich <lb/>derſelbe, als der Schlag durchgieng, von ſelbſt zuſam-<lb/>men, und ward wiederum in ſeine vorige natürliche Stelle <lb/>zurückgeworfen, konnte auch nicht anders als mit Gewalt <lb/>von derſelben getrennt werden, woraus die Kraft der Elek-<lb/>tricität, erſchlafften Fibern ihre Spannung wiederzugeben,
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5694 <pb o="196" file="0216" n="216" rhead="Funfzehntes Capitel."/>
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5695 deutlich erhellet. </s>
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5696 <s xml:id="echoid-s2912" xml:space="preserve">In der That, wenn wir bedenken, daß <lb/>die elektriſche Materie Muſkeln in Bewegung gebracht, <lb/>vom Schlage gelähmte Glieder geſtärkt, ja ſogar bey vie-<lb/>len, deren Lähmungen nicht aus dem Rückenmark ent-<lb/>ſprangen, die Lebenskraft und Bewegung wiederhergeſtel-<lb/>let hat, iſt dies nicht ein überzeugender Beweiß, daß die <lb/>Urſache, welche die Muſkeln in Bewegung ſetzt, mit dem-<lb/>jenigen Fluidum einerley ſey, welches wir durch die Elek-<lb/>triſirmaſchine einſammlen?</s>
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5697 <s xml:id="echoid-s2913" xml:space="preserve"/>
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5698 </p>
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5699 <p>
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5700 <s xml:id="echoid-s2914" xml:space="preserve">Da die Arzneykunde kein Univerſalmittel kennt, ſo <lb/>können wir auch nicht annehmen, daß die Elektricität alle <lb/>Krankheiten, gegen welche ſie gebraucht wird, hebe. </s>
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5701 <s xml:id="echoid-s2915" xml:space="preserve">Ihre <lb/>Wirkung wird immer im Verhältniß der Diſpoſition des <lb/>Kranken, und der Talente des Arztes ſtärker oder ſchwä-<lb/>cher ſeyn; </s>
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5702 <s xml:id="echoid-s2916" xml:space="preserve">daher man ſich auch gar nicht verwundern darf, <lb/>wenn viele Krankheiten ihr den hartnäckigſten Widerſtand <lb/>gethan haben, und andere nur in einigem Grade geſindert <lb/>worden ſind, oder wenn der Fortgang der Cur oft durch <lb/>Ungedult oder Vorurtheil des Kranken gehemmet worden <lb/>iſt. </s>
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5703 <s xml:id="echoid-s2917" xml:space="preserve">Man muß hierbey dennoch eingeſtehen, daß der Fort-<lb/>gang der mediciniſchen Elektricität, ſelbſt in ihrer Kind-<lb/>heit, und da ſie noch mit Furcht, Vorurtheil und Eigen-<lb/>nutz zu kämpfen hatte, in der That groß war, und daß <lb/>wir uns jetzt die größte Hoffnung einer beträchtlichen Er-<lb/>weiterung derſelben machen künnen, da ſie durch Aerzte <lb/>von den ausgezeichnetſten Verdienſten bearbeitet und be-<lb/>fördert wird.</s>
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5704 <s xml:id="echoid-s2918" xml:space="preserve"/>
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5705 </p>
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5706 </div>
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5707 <div xml:id="echoid-div255" type="section" level="1" n="245">
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5708 <head xml:id="echoid-head270" xml:space="preserve">203. Verſuch.</head>
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5709 <p>
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5710 <s xml:id="echoid-s2919" xml:space="preserve">Dieſer Verſuch zeigt, daß man die Elektricität durch <lb/>Wärme und Kälte in Bewegung ſetzen könne. </s>
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5711 <s xml:id="echoid-s2920" xml:space="preserve">Er ſchreibt <lb/>ſich urſprünglich von Canton her. </s>
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5712 <s xml:id="echoid-s2921" xml:space="preserve">Dieſer nahm einige <lb/>dünne Glaskugeln von etwa 1{1/2} Zoll Durchmeſſer, mit <lb/>8 — 9 Zoll langen Stielen oder Röhren, elektriſirte ſie, <lb/>einige auf der innern Seite poſitiv, andere negativ, und <lb/>verſchloß ſie hermetriſch. </s>
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5713 <s xml:id="echoid-s2922" xml:space="preserve">Bald hierauf brachte er dieſe <lb/>Bälle gegen das Elektrometer, und konnte nicht das ge-
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5714 <pb o="197" file="0217" n="217" rhead="Mediciniſche Elektricität."/>
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5715 ringſte Merkmal einer Elektricität wahrnehmen; </s>
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5716 <s xml:id="echoid-s2923" xml:space="preserve">wenn er <lb/>ſie aber in einer Entfernung von 5 — 6 Zoll ans Feuer <lb/>hielt, ſo wurden ſie in kurzer Zeit ſtark elektriſch, und <lb/>noch ſtärker, wenn ſie abkühlten. </s>
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5717 <s xml:id="echoid-s2924" xml:space="preserve">Dieſe Kugeln gaben <lb/>auch jederzeit, wenn ſie erhitzt waren, an andere Körper <lb/>Elektricität ab, oder nahmen ſie von ihnen an, je nach-<lb/>dem die in ihnen befindliche Elektricität poſitiv oder nega-<lb/>tiv war. </s>
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5718 <s xml:id="echoid-s2925" xml:space="preserve">Allzuöfteres Erwärmen verminderte ihre Kraft; <lb/></s>
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5719 <s xml:id="echoid-s2926" xml:space="preserve">wenn man aber eine davon eine Woche lang unter Waſſer <lb/>legte, ſo ſchadete ihr dies im geringſten nicht. </s>
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5720 <s xml:id="echoid-s2927" xml:space="preserve">Sie be-<lb/>hielten ihre Kraft auf ſechs Iahre lang. </s>
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5721 <s xml:id="echoid-s2928" xml:space="preserve">Von dem Tur-<lb/>malin und vielen andern Edelſteinen iſt ebenfalls bekannt, <lb/>daß ſie durch Erwärmung elektriſch werden. </s>
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5722 <s xml:id="echoid-s2929" xml:space="preserve">Der Turma-<lb/>lin hat allemahl zugleich poſitive und negative Elektricität, <lb/>ſo, daß ſich auf einer Seite die eine, auf der andern die ent-<lb/>gegengeſetzte befindet. </s>
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5723 <s xml:id="echoid-s2930" xml:space="preserve">Man kann dieſe Elektricität ſowohl <lb/>durch Reiben, als durch Erwärmen, ja ſogar durch Ein-<lb/>ſenken des Steins in kochendes Waſſer erregen.</s>
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5724 <s xml:id="echoid-s2931" xml:space="preserve"/>
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5725 </p>
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5726 </div>
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5727 <div xml:id="echoid-div256" type="section" level="1" n="246">
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5728 <head xml:id="echoid-head271" xml:space="preserve">204. Verſuch.</head>
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5729 <p>
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5730 <s xml:id="echoid-s2932" xml:space="preserve">Man iſolire ein empſindliches Queckſilberthermome-<lb/>ter, und ſtelle die Kugel deſſelben zwiſchen zwo hölzerne <lb/>Kugeln, von denen die eine an den Conductor befeſtiget <lb/>iſt, die andere aber mit der Erde in Verbindung ſteht, <lb/>ſo wird beym Durchgange der elektriſchen Materie zwi-<lb/>ſchen beyden Kugeln das Queckſilber im Thermometer be-<lb/>trächtlich ſteigen. </s>
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5731 <s xml:id="echoid-s2933" xml:space="preserve">Bey einem Cylinder von 7{1/2} Zoll Durch-<lb/>meſſer, erhob die elektriſche Materie, indem ſie aus einer Ku-<lb/>gel von Lebensbaum in eine von Büchenholz übergieng, das <lb/>Queckſilber im Thermometer von 68° — 110°, und zum <lb/>2 tenmal bis 150°. </s>
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5732 <s xml:id="echoid-s2934" xml:space="preserve">Beym Uebergange aus einer Spitze von <lb/>Buchsbaum in eine von Lebensbaum ſtieg das Thermome-<lb/>ter von 68° — 85°; </s>
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5733 <s xml:id="echoid-s2935" xml:space="preserve">aus einer Spitze von Buchsbaum in eine <lb/>Kugel von Buchsbaum von 67° — 100°; </s>
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5734 <s xml:id="echoid-s2936" xml:space="preserve">aus einer Kugel <lb/>von Buchsbaum in eine meſſingne Spitze von 66° — 100°; <lb/></s>
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5735 <s xml:id="echoid-s2937" xml:space="preserve">aus einer Kugel in die andere, wenn die Kugel des Ther-<lb/>mometers mit Flanell bedeckt war, von 69° — 100°.</s>
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5736 <s xml:id="echoid-s2938" xml:space="preserve"/>
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5737 </p>
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5738 <pb o="198" file="0218" n="218" rhead="Funfzehntes Capitel."/>
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5739 <p>
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5740 <s xml:id="echoid-s2939" xml:space="preserve">Einige Schriftſteller haben Verzeichniſſe von Krank-<lb/>heiten gegeben, in welchen die Elektricität mit gutem Er-<lb/>folg gebraucht worden iſt; </s>
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5741 <s xml:id="echoid-s2940" xml:space="preserve">ich will aber hier dieſem Bey-<lb/>ſpiele nicht folgen, da ich höre, daß man dieſe Krankhei-<lb/>ten nach Anleitung der in den letzten vier Iahren angeſtell-<lb/>ten Verſuche, in ein ordentliches Syſtem gebracht hat, <lb/>welches aber gehörig zu überſehen, eine genaue Kenntniß <lb/>der Krankheiten und ihrer Urſachen und Symptome, er-<lb/>forderlich iſt.</s>
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5742 <s xml:id="echoid-s2941" xml:space="preserve"/>
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5743 </p>
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5744 <p>
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5745 <s xml:id="echoid-s2942" xml:space="preserve">Man hat in dieſem Syſtem die Elektricität unter die <lb/>krampfſtillenden Arzneyen geordnet, und ſie als eines der <lb/>wirkſamſten äuſſerlichen Mittel angeſehen; </s>
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5746 <s xml:id="echoid-s2943" xml:space="preserve">ſie dienet nach <lb/>der verſchiedenen Art ihrer Anwendung bald als ein <lb/>ſchmerzſtillendes, bald als ein reizendes, bald als ein zer-<lb/>theilendes Mittel. </s>
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5747 <s xml:id="echoid-s2944" xml:space="preserve">In der Arzneykunſt läßt ſie ſich bey <lb/>Lähmungen, beym Reißen, bey Wechſelfiebern, Kräm-<lb/>pfen, Verſtopfungen und Entzündungen gebrauchen. </s>
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5748 <s xml:id="echoid-s2945" xml:space="preserve">Dem <lb/>Wundarzt leiſtet ſie beträchtlichen Nutzen bey Vertrock-<lb/>nungen, Verrenkungen, Geſchwülſten, beſonders bey an-<lb/>gelaufenen Drüſen, Schwinden der Muſkeln, und einer <lb/>Menge von andern in die Augen fallenden Uebeln, welche <lb/>den Umſtehenden ſowohl als dem Patienten ſelbſt öfters <lb/>großen Kummer verurſachen. </s>
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5749 <s xml:id="echoid-s2946" xml:space="preserve">Auch die Gicht und den <lb/>Kropf, zwo Krankheiten, welche heut zu Tage das <lb/>menſchliche Geſchlecht ſo häufig plagen und den Aerzten <lb/>ein Stein des Anſtoßes ſind, rechnet man unter die Zu-<lb/>fälle, bey welchen ſich die Elektricität anwenden läßt, und <lb/>beſonders im Anfange der Krankheit, wie man mir geſagt <lb/>hat, beynahe Wunder thut. </s>
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5750 <s xml:id="echoid-s2947" xml:space="preserve">Bey gichtiſchen Anfällen <lb/>an gefährlichen Theilen des Körpers ſcheint ſie weit beſſer <lb/>zu ſeyn, als irgend ein anderes Arzneymittel, da man ſie <lb/>unmittelbar an den Sitz der Krankheit bringen kann, wo <lb/>ſie ſtärker und ſchneller, als alle andere Kräfte der Arz-<lb/>neykunſt, wirket, und nach Befinden gemäßiget werden <lb/>kann. </s>
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5751 <s xml:id="echoid-s2948" xml:space="preserve">Da ſie überdieß ein Mittel iſt, deſſen Wirkung <lb/>der Kranke durch Nachdenken beurtheilen und durchs Ge-
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5752 <pb o="199" file="0219" n="219" rhead="Mediciniſche Elektricität."/>
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5753 fühl empfinden kann, ſo ſcheint ſie mir die Aufmerkſam-<lb/>keit und fernere Unterſuchung vernünftiger Männer weit <lb/>mehr zu verdienen, als irgend eine zuſammengeſetzte Arz-<lb/>ney, in die man wenig Vertrauen ſetzt, oder ein aufge-<lb/>legtes Pflaſter, auf das man gar nicht achtet.</s>
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5754 <s xml:id="echoid-s2949" xml:space="preserve"/>
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5755 </p>
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5756 <p>
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5757 <s xml:id="echoid-s2950" xml:space="preserve">Der gute Erfolg der Elektricität in Linderung der <lb/>Uebel des menſchlichen Körpers wird dadurch beträchtlich <lb/>vermehrt, daß man ſie auf ſo verſchiedne Art und in ſo <lb/>verſchiednen Graden der Stärke anbringen kann, wodurch <lb/>auch ihre Wirkungen ſchneller, empfindlicher und ſtärker <lb/>werden. </s>
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5758 <s xml:id="echoid-s2951" xml:space="preserve">Die ehemals gebräuchlichen Methoden waren <lb/>der Schlag, der Funken und bisweilen, obgleich ſehr ſel-<lb/>ten, das ſimple Elektriſiren. </s>
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5759 <s xml:id="echoid-s2952" xml:space="preserve">Iezt ſind ſie mannichfalti-<lb/>ger und zahlreicher geworden. </s>
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5760 <s xml:id="echoid-s2953" xml:space="preserve">Man kann den Strom <lb/>der elektriſchen Materie ohne Schlag durch jeden Theil <lb/>des Körpers gehen laſſen; </s>
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5761 <s xml:id="echoid-s2954" xml:space="preserve">man kann ihn auch in jeden <lb/>Theil hineinbringen, oder aus jedem ausziehen, und die <lb/>Wirkung in jedem Falle wieder dadurch abändern, daß <lb/>man die Materie durch Körper gehen läßt, die ihr ſtärker <lb/>oder ſchwächer widerſtehen; </s>
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5762 <s xml:id="echoid-s2955" xml:space="preserve">man kann ihn auf die bloße <lb/>Haut gehen laſſen, oder dieſelbe mit verſchiedenen wider-<lb/>ſtehenden Subſtanzen bedecken; </s>
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5763 <s xml:id="echoid-s2956" xml:space="preserve">man kann die Kraft nach <lb/>Gefallen verdünnen oder verdichten, auf eine Stelle ein-<lb/>ſchränken, oder auf mehrere Theile des Körpers ver-<lb/>breiten.</s>
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5764 <s xml:id="echoid-s2957" xml:space="preserve"/>
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5765 </p>
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5766 <p>
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5767 <s xml:id="echoid-s2958" xml:space="preserve">Die hiezu nöthige Geräthſchaft iſt einfach und be-<lb/>ſteht aus folgenden Stücken.</s>
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5768 <s xml:id="echoid-s2959" xml:space="preserve"/>
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5769 </p>
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5770 <p>
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5771 <s xml:id="echoid-s2960" xml:space="preserve">1) Eine Elektriſirmaſchine mit einem iſolirten Küſ-<lb/>ſen, durch welche man einen ſtarken und anhaltenden <lb/>Strom von elektriſcher Materie erhalten kann.</s>
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5772 <s xml:id="echoid-s2961" xml:space="preserve"/>
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5773 </p>
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5774 <p>
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5775 <s xml:id="echoid-s2962" xml:space="preserve">2) Ein Stuhl mit iſolirenden Füſſen, oder vielmehr <lb/>ein Armſtuhl auf einem großen iſolirenden Geſtelle. </s>
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5776 <s xml:id="echoid-s2963" xml:space="preserve">Den <lb/>innern Theil der Rücklehne muß man niederlaſſen oder <lb/>wegnehmen können, um im erforderlichen Falle den Rü-<lb/>cken eines Kranken elektriſiren zu können: </s>
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5777 <s xml:id="echoid-s2964" xml:space="preserve">auch müſſen die <lb/>Arme des Stuhls länger als gewöhnlich ſeyn.</s>
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5778 <s xml:id="echoid-s2965" xml:space="preserve"/>
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5779 </p>
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5780 <pb o="200" file="0220" n="220" rhead="Funfzehntes Capitel."/>
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5781 <p>
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5782 <s xml:id="echoid-s2966" xml:space="preserve">3) Eine leidner Flaſche mit einem Elektrometer.</s>
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5783 <s xml:id="echoid-s2967" xml:space="preserve"/>
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5784 </p>
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5785 <p>
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5786 <s xml:id="echoid-s2968" xml:space="preserve">4) Ein paar große Directoren uud hölzerne Spitzen.</s>
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5787 <s xml:id="echoid-s2969" xml:space="preserve"/>
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5788 </p>
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5789 <p>
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5790 <s xml:id="echoid-s2970" xml:space="preserve">5) Einige Glasröhren von verſchiedenen Durchmeſ-<lb/>ſern, deren einige ſich in haarröhrenförmige Spitzen en-<lb/>digen.</s>
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5791 <s xml:id="echoid-s2971" xml:space="preserve"/>
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5792 </p>
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5793 <p>
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5794 <s xml:id="echoid-s2972" xml:space="preserve">Hiezu kann man noch einen etwas großen allgemeinen <lb/>Auslader, ein paar kleine Directoren mit ſilbernen Drä-<lb/>then und eine iſolirende Zange ſetzen.</s>
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5795 <s xml:id="echoid-s2973" xml:space="preserve"/>
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5796 </p>
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5797 <p>
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5798 <s xml:id="echoid-s2974" xml:space="preserve">Fig. </s>
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5799 <s xml:id="echoid-s2975" xml:space="preserve">93. </s>
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5800 <s xml:id="echoid-s2976" xml:space="preserve">zeigt die Directoren, deren Handgriffe <lb/>von Glas ſind. </s>
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5801 <s xml:id="echoid-s2977" xml:space="preserve">A iſt ein meſſingener Drath mit einer <lb/>Kugel am Ende. </s>
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5802 <s xml:id="echoid-s2978" xml:space="preserve">An dem einen Director iſt der Drath <lb/>gebogen, um die elektriſche Materie deſto bequemer ins <lb/>Auge u. </s>
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5803 <s xml:id="echoid-s2979" xml:space="preserve">d. </s>
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5804 <s xml:id="echoid-s2980" xml:space="preserve">gl. </s>
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5805 <s xml:id="echoid-s2981" xml:space="preserve">gehen zu laſſen. </s>
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5806 <s xml:id="echoid-s2982" xml:space="preserve">Die Kugeln kann man <lb/>von den Dräthen abſchrauben und die hölzerne Spitze B <lb/>an ihre Stelle ſetzen, oder auch das zugeſpitzte Ende des <lb/>meſſingenen Draths ſelbſt gebrauchen. </s>
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5807 <s xml:id="echoid-s2983" xml:space="preserve">Die Directoren <lb/>müſſen allezeit an dem vom Meſſinge entfernteſten Ende <lb/>des gläſernen Handgrifs gehalten werden, wobey man <lb/>Sorge tragen muß, daß das Meſſing durch die Wärme <lb/>der Hand nicht feucht werde.</s>
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5808 <s xml:id="echoid-s2984" xml:space="preserve"/>
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5809 </p>
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5810 <p>
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5811 <s xml:id="echoid-s2985" xml:space="preserve">Fig. </s>
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5812 <s xml:id="echoid-s2986" xml:space="preserve">85. </s>
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5813 <s xml:id="echoid-s2987" xml:space="preserve">iſt die Flaſche zur mediciniſchen Elektrici-<lb/>tät, mit einem Elektrometer verſehen, um die Gewalt <lb/>ves Schlags einzuſchränken, und dem Operator es mög-<lb/>lich zu machen, daß er mehrere Schläge von gleicher <lb/>Stärke nach einander geben könne. </s>
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5814 <s xml:id="echoid-s2988" xml:space="preserve">C iſt ein gebogenes <lb/>Stück Glas, an deſſen obern Theil eine meſſingene Hülſe <lb/>D mit einer federnden Röhre E angeküttet iſt; </s>
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5815 <s xml:id="echoid-s2989" xml:space="preserve">der Drath <lb/>F iſt in dieſer Röhre beweglich, ſo daß man die Kugel <lb/>G in jede beliebige Entfernung von der Kugel H brin-<lb/>gen kann. </s>
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5816 <s xml:id="echoid-s2990" xml:space="preserve">Auch das Ende I des gebognen gläſernen <lb/>Stücks iſt mit einer ſedernden Röhre verſehen, die ſich <lb/>an dem mit der innern Seite verbundenen Drathe K auf <lb/>und ab ſchieben läßt.</s>
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5817 <s xml:id="echoid-s2991" xml:space="preserve"/>
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5818 </p>
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5819 <p>
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5820 <s xml:id="echoid-s2992" xml:space="preserve">Wenn man dieſe Flaſche gebrauchen will, ſo ſtelle <lb/>man die Kugel H in Berührung mit dem Conductor, oder <lb/>verbinde ſie mit demſelben durch einen Drath, und lade
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5821 <pb o="201" file="0221" n="221" rhead="Mediciniſche Elektricität."/>
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5822 ſie auf die gewöhnliche Art. </s>
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5823 <s xml:id="echoid-s2993" xml:space="preserve">Wenn nun ein Drath von <lb/>der Kugel L bis an die äußere Belegung geht, ſo wird <lb/>die Flaſche entladen, ſobald nur die elektriſche Materie <lb/>Kraft genug hat, durch die Luft zwiſchen den beyden Ku-<lb/>geln G und H durchzubrechen; </s>
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5824 <s xml:id="echoid-s2994" xml:space="preserve">folglich iſt der Schlag deſto <lb/>ſtärker, je weiter dieſe beyden Kugeln von einander abſtehen.</s>
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5825 <s xml:id="echoid-s2995" xml:space="preserve"/>
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5826 </p>
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5827 <p>
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5828 <s xml:id="echoid-s2996" xml:space="preserve">Es fällt in die Augen, daß das Elektrometer in die-<lb/>ſer Verbindung eben ſo, wie der gewöhnliche Auslader, <lb/>wirkt, und eine Communication zwiſchen der äußern und <lb/>innern Seite der Flaſche macht; </s>
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5829 <s xml:id="echoid-s2997" xml:space="preserve">nur mit dieſem Unter-<lb/>ſchiede, daß der Abſtand von dem Ende, welches mit der <lb/>innern Seite in Verbindung ſteht, eingeſchränkt und re-<lb/>guliret werden kann. </s>
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5830 <s xml:id="echoid-s2998" xml:space="preserve">Man kann nun den Schlag durch <lb/>jeden Theil des menſchlichen Körpers gehen laſſen, wenn <lb/>man dieſen Theil mit in die zwiſchen beyden Seiten der <lb/>Flaſche gemachte Verbindung bringet. </s>
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5831 <s xml:id="echoid-s2999" xml:space="preserve">Dies kann ſehr <lb/>bequem geſchehen, wenn man ven einen Director durch <lb/>einen Drath mit dem Elektrometer, und den andern mit <lb/>der äußern Seite der Flaſche verbindet; </s>
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5832 <s xml:id="echoid-s3000" xml:space="preserve">man hält alsdann <lb/>die Directoren bey ihren gläſernen Handgriffen, und bringt <lb/>ihre Kugeln an die Enden der Theile, durch welche die <lb/>Schläge gehen ſollen.</s>
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5833 <s xml:id="echoid-s3001" xml:space="preserve"/>
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5834 </p>
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5835 <p>
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5836 <s xml:id="echoid-s3002" xml:space="preserve">Die Stärke des Schlags wird, wie wir bereits be-<lb/>merkt haben, vermehrt oder vermindert, wenn man den <lb/>Abſtand der beyden Kugeln G und H von einanver ver-<lb/>größert oder verringert, welches der Operator nach der <lb/>Stärke und Empfindlichkeit des Patienten abmeſſen <lb/>muß.</s>
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5837 <s xml:id="echoid-s3003" xml:space="preserve"/>
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5838 </p>
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5839 <p>
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5840 <s xml:id="echoid-s3004" xml:space="preserve">Die Handgriffe der Directoren, das gebogne Stück <lb/>Glas C, und die über die Belegung hervorragenden Theile <lb/>der Flaſche müſſen ſorgfältig getrocknet werden. </s>
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5841 <s xml:id="echoid-s3005" xml:space="preserve">Auch <lb/>muß man die Enden der Directoren gegen den leidenden <lb/>Theil andrücken, um den Schlag leichter durch denſelben <lb/>zu führen.</s>
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5842 <s xml:id="echoid-s3006" xml:space="preserve"/>
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5843 </p>
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5844 <p>
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5845 <s xml:id="echoid-s3007" xml:space="preserve">Einige haben auch die elektriſche Zange für ein ſehr <lb/>bequemes Inſtrument zu Leitung des Schlags durch ein-
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5846 <pb o="202" file="0222" n="222" rhead="Funfzehntes Capitel."/>
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5847 zelne Theile des Körpers gehalten. </s>
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5848 <s xml:id="echoid-s3008" xml:space="preserve">Ihre Einrichtung <lb/>und ihr Gebrauch erhellet genugſam aus Fig. </s>
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5849 <s xml:id="echoid-s3009" xml:space="preserve">86.</s>
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5850 <s xml:id="echoid-s3010" xml:space="preserve"/>
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5851 </p>
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5852 <p>
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5853 <s xml:id="echoid-s3011" xml:space="preserve">Auch hat man folgende Methode, die condenſirte <lb/>elektriſche Materie aus der innern Seite einer geladenen <lb/>leidner Flaſche zu ziehen, unter gewiſſen Umſtänden vor-<lb/>züglich vortheilhaft gefunden. </s>
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5854 <s xml:id="echoid-s3012" xml:space="preserve">Man verbinde einen Di-<lb/>rector durch einen Drath mit dem Knopfe einer leidner <lb/>Flaſche, lade die Flaſche entweder völlig oder zum Theil, <lb/>und halte dann die Kugel oder Spitze des Directors an <lb/>den Theil des Körpers, den man elektriſiren will, ſo wird die <lb/>in der Flaſche condenſirte elektriſche Materie in einem dich-<lb/>ten und langſamen Strome in dieſen Theil übergehen und <lb/>eine ſtechende Empſindung verurſachen, welche eine beträcht-<lb/>liche Wärme hervorbrigt. </s>
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5855 <s xml:id="echoid-s3013" xml:space="preserve">Hält man gegen das Ende <lb/>des Directors einen mit der Erde verbundenen Drath, ſo <lb/>wird der Uebergang der Materie ſchneller, und die Em-<lb/>pfindung ſtärker. </s>
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5856 <s xml:id="echoid-s3014" xml:space="preserve">Man ſieht leicht, daß in dieſem Falle <lb/>die Verbindung zwiſchen der innern und äußern Seite der <lb/>Flaſche nicht vollſtändig iſt, daher man auch keinen Schlag <lb/>fühlt. </s>
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5857 <s xml:id="echoid-s3015" xml:space="preserve">Die condenſirte Materie geht in einem dichten <lb/>langſamen Strome durch den erforderlichen Theil, indem <lb/>die äußere Seite eine hinreichende Menge elektriſcher Ma-<lb/>terie aus den umliegenden leitenden Subſtanzen an ſich <lb/>nimmt, um das Gleichgewicht wieder herzuſtellen.</s>
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5858 <s xml:id="echoid-s3016" xml:space="preserve"/>
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5859 </p>
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5860 <p>
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5861 <s xml:id="echoid-s3017" xml:space="preserve">Um einen Strom von elektriſcher Materie durch <lb/>einen Theil des menſchlichen Körpers hindurchgehen zu <lb/>laſſen, verbinde man den einen Director durch einen <lb/>Drath mit dem poſitiven, den andern mit dem negativen <lb/>Conductor oder mit einem iſolirten Küſſen, ſtelle die En-<lb/>den der Directoren an die Enden des leidenden Theils, <lb/>und drehe die Maſchine, ſo wird die elektriſche Materie <lb/>aus dem einen Director in den andern durch den gedach-<lb/>ten Theil überſtrömen.</s>
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5862 <s xml:id="echoid-s3018" xml:space="preserve"/>
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5863 </p>
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5864 <p>
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5865 <s xml:id="echoid-s3019" xml:space="preserve">Um den Strom der elektriſchen Materie auf einen <lb/>Theil des Körpers zu leiten, verbinde man den Director
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5866 <pb o="203" file="0223" n="223" rhead="Mediciniſche Elektricität."/>
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5867 mit dem poſitiven Conductor, drehe die Maſchine und <lb/>halte das meſſingene Ende des Directors gegen den Kör-<lb/>per des Kranken, ſo wird die Materie aus der Kugel in <lb/>den Körper übergehen. </s>
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5868 <s xml:id="echoid-s3020" xml:space="preserve">Oder man iſolire den Kranken, <lb/>und ziehe die ihm mitgetheilte Elektricität vermittelſt der <lb/>Directoren aus ſeinem Körper. </s>
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5869 <s xml:id="echoid-s3021" xml:space="preserve">In dieſem Falle muß <lb/>ein Drath von dem meſſingenen Theile des Directors auf <lb/>die Erde oder in die Hand des Operators gehen. </s>
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5870 <s xml:id="echoid-s3022" xml:space="preserve">In <lb/>beyden Fällen kann man die Menge und Wirkungsart <lb/>der Materie verändern, wenn man ſie durch meſſingene <lb/>oder hölzerne Kugeln oder Spitzen gehen läßt, oder die <lb/>Haut mit Flanell bedeckt; </s>
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5871 <s xml:id="echoid-s3023" xml:space="preserve">in allen Fällen, in welchen <lb/>ſonſt die Friction angerathen wird, kann man ſehr wahr-<lb/>ſcheinlich vermuthen, daß die Bedeckung des leidenden <lb/>Theils mit Flanell, und das Reiben deſſelben mit der Ku-<lb/>gel eines mit der Elektriſirmaſchine verbundenen Dire-<lb/>ctors, eine vortrefliche Wirkung thun werde. </s>
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5872 <s xml:id="echoid-s3024" xml:space="preserve">Der Wi-<lb/>derſtand, den die Bewegung der Materie leidet, läßt <lb/>ſich verſchiedentlich abändern, wenn man eine dickere Be-<lb/>deckung wählt, oder ſtatt des Flanells eine andere Sub-<lb/>ſtanz nimmt, durch welche die Materie durchgehen muß.</s>
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5873 <s xml:id="echoid-s3025" xml:space="preserve"/>
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5874 </p>
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5875 <p>
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5876 <s xml:id="echoid-s3026" xml:space="preserve">Einige beſondere Wirkungen finden ſtatt; </s>
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5877 <s xml:id="echoid-s3027" xml:space="preserve">wenn <lb/>man den unterbrochenen Funken gebraucht, d. </s>
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5878 <s xml:id="echoid-s3028" xml:space="preserve">i. </s>
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5879 <s xml:id="echoid-s3029" xml:space="preserve">wenn <lb/>man den Funken aus einem zweyten Condunctor <lb/>nimmt, der innerhalb der Schlagweite des erſten Condu-<lb/>ctors ſteht. </s>
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5880 <s xml:id="echoid-s3030" xml:space="preserve">Es iſt ſehr wahrſcheinlich, daß in dieſem <lb/>Falle die Verdichtung und Ausdehnung des Funkens weit <lb/>heftiger ſey, als wenn er bloß aus dem erſten Conductor <lb/>allein gezogen wird. </s>
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5881 <s xml:id="echoid-s3031" xml:space="preserve">Wenn ein unterbrochner Funken <lb/>erforderlich iſt, ſo wird der Director mit dem zweyten <lb/>Conductor verbunden, und dann, wie gewöhnlich, ge-<lb/>braucht.</s>
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5882 <s xml:id="echoid-s3032" xml:space="preserve"/>
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5883 </p>
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5884 <p>
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5885 <s xml:id="echoid-s3033" xml:space="preserve">Fig. </s>
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5886 <s xml:id="echoid-s3034" xml:space="preserve">87. </s>
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5887 <s xml:id="echoid-s3035" xml:space="preserve">zeigt einen etwas großen allgemeinen Aus-<lb/>lader, mit einem zwiſchen den beyden Säulen veſſelben <lb/>ſitzenden Kranken; </s>
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5888 <s xml:id="echoid-s3036" xml:space="preserve">wobey die eine Kugel bey A, die an-<lb/>dere bey B ſtehet. </s>
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5889 <s xml:id="echoid-s3037" xml:space="preserve">Wie bequem dieſer Apparatus ſey, fällt
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5890 <pb o="204" file="0224" n="224" rhead="Funfzehntes Capitel."/>
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5891 bey Betrachtung der Figur in die Augen; </s>
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5892 <s xml:id="echoid-s3038" xml:space="preserve">denn da die <lb/>Gelenke ſowohl eine horizontale als eine verticale Bewe-<lb/>gung zulaſſen, und die Dräthe durch zwo federnde Hülſen <lb/>durchgehen, ſo können dieſe letztern in jede Richtung, und <lb/>die Kugeln in jede beliebige Stellung gebracht werden. <lb/></s>
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5893 <s xml:id="echoid-s3039" xml:space="preserve">Wenn man daher den einen Drath mit einem poſiti-<lb/>den, den andern mit einem negativen Conductor, oder <lb/>auch den einen mit dem Boden einer leidner Flaſche, <lb/>und den andern mit dem Elektrometer verbindet, ſo <lb/>kann der Schlag oder Strom mit der größten Leich-<lb/>tigkeit auf jeden Theil geführt werden. </s>
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5894 <s xml:id="echoid-s3040" xml:space="preserve">Man ſieht <lb/>auch leicht, daß ein jeder vermittelſt der zwey Gelen-<lb/>ke dieſes höchſt einfachen Apparatus ſehr leicht ſich ſelbſt <lb/>oder einen Kranken, ohne Beyhülfe einer andern Perſon <lb/>elektriſiren kann; </s>
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5895 <s xml:id="echoid-s3041" xml:space="preserve">er kann nämlich mit einer Hand die <lb/>Maſchine drehen, indem er vermittelſt dieſes allgemeinen <lb/>Ausladers den Strom oder Schlag der elektriſchen Ma-<lb/>terie erhält. </s>
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5896 <s xml:id="echoid-s3042" xml:space="preserve">Man kann eben dieſes leicht auch ſo bewir-<lb/>ken, daß man an den einen Conductor einen Drath befe-<lb/>ſtiget, und das andere Ende deſſelben an das Ende des <lb/>Theils, durch welchen man den Schlag oder den Strom <lb/>führen will, anſtecket; </s>
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5897 <s xml:id="echoid-s3043" xml:space="preserve">dann aber einen Director mit dem <lb/>andern Conductor verbindet, und ihn an das andere Ende <lb/>dieſes Theils hält. </s>
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5898 <s xml:id="echoid-s3044" xml:space="preserve">Kommen etwa dabey die Dräthe mit <lb/>dem Tiſche in Berührung, ſo darf man nur eine kleine <lb/>Glasröhre darüber ſtecken, welche die Zerſtreuung der <lb/>elektriſchen Materie verhindern wird.</s>
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5899 <s xml:id="echoid-s3045" xml:space="preserve"/>
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5900 </p>
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diff changeset
5901 <p>
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5902 <s xml:id="echoid-s3046" xml:space="preserve">L und M, Fig. </s>
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5903 <s xml:id="echoid-s3047" xml:space="preserve">84, ſind Glasröhren, durch welche <lb/>dünne Dräthe gehen, um die elektriſche Materie in das <lb/>Ohr oder den Schlund zu führen.</s>
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diff changeset
5904 <s xml:id="echoid-s3048" xml:space="preserve"/>
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diff changeset
5905 </p>
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diff changeset
5906 <p>
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diff changeset
5907 <s xml:id="echoid-s3049" xml:space="preserve">Fig. </s>
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5908 <s xml:id="echoid-s3050" xml:space="preserve">88. </s>
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5909 <s xml:id="echoid-s3051" xml:space="preserve">zeigt eine andere etwas größere Glasröhre, <lb/>welche am Ende in eine Haarröhre ausläuft; </s>
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5910 <s xml:id="echoid-s3052" xml:space="preserve">darein wird <lb/>etwas weniges Roſenwaſſer oder eine andere flüßige Ma-<lb/>terie gegoſſen, hierauf die Röhre durch einen Drath mit <lb/>dem erſten Conductor verbunden und und der Cylinder <lb/>gedreht, ſo kann man einen zertheilten, ſanften und er-
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5911 <pb o="205" file="0225" n="225" rhead="Mediciniſche Elektricität."/>
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diff changeset
5912 friſchenden Strom von dieſer flüßigen Materie auf den <lb/>leidenden Theil führen.</s>
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5913 <s xml:id="echoid-s3053" xml:space="preserve"/>
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5914 </p>
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5915 <p>
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5916 <s xml:id="echoid-s3054" xml:space="preserve">In allen Fällen iſt es ſehr rathſam, mit den gelin-<lb/>deſten Operationen anzufangen, und ſie nur nach und <lb/>nach ſo zu verſtärken, wie es die Stärke und Conſtitution <lb/>des Patienten, oder die Natur der Krankheit erfordert. <lb/></s>
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5917 <s xml:id="echoid-s3055" xml:space="preserve">Zuerſt kann man das Ausſtrömen aus einer hölzernen <lb/>Spitze, einer hölzernen Kugel, oder aus einer meſſinge-<lb/>nen Spitze gebrauchen, dann, wofern es nöthig iſt, Fun-<lb/>ken ziehen, oder ſchwache Schläge geben.</s>
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5918 <s xml:id="echoid-s3056" xml:space="preserve"/>
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5919 </p>
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5920 <p>
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5921 <s xml:id="echoid-s3057" xml:space="preserve">Bey rhevmatiſchen Zufällen wird insgemein die elek-<lb/>triſche Friction gebraucht. </s>
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5922 <s xml:id="echoid-s3058" xml:space="preserve">Bleiben die Schmerzen auf <lb/>einer Stelle, ſo kann man auch ſchwache Schläge geben. <lb/></s>
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5923 <s xml:id="echoid-s3059" xml:space="preserve">Zur Linderung der Zahnſchmerzen kann man ſehr ſchwa-<lb/>che Schläge durch den Zahn gehen laſſen; </s>
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5924 <s xml:id="echoid-s3060" xml:space="preserve">oder den lei-<lb/>denden Theil mit Flanell bedecken, und mit einem mit <lb/>der Maſchine verbundenen Director reiben.</s>
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5925 <s xml:id="echoid-s3061" xml:space="preserve"/>
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5926 </p>
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5927 <p>
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5928 <s xml:id="echoid-s3062" xml:space="preserve">Bey Augenentzündungen und andern Augenkrank-<lb/>heiten muß man die elektriſche Materie aus einer hölzer-<lb/>nen Spitze ſtrömen laſſen: </s>
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5929 <s xml:id="echoid-s3063" xml:space="preserve">dies erregt eine Empfindung, <lb/>die dem Gefühl eines ſanften kühlenden Windes ähnlich <lb/>iſt, erzeugt aber auch zugleich eine gelinde Wärme in dem <lb/>leidenden Theile.</s>
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5930 <s xml:id="echoid-s3064" xml:space="preserve"/>
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5931 </p>
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5932 <p>
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5933 <s xml:id="echoid-s3065" xml:space="preserve">Bey Lähmungen wird die elektriſche Friction nebſt <lb/>ſchwachen Schlägen gebraucht. </s>
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5934 <s xml:id="echoid-s3066" xml:space="preserve">Man muß auch allezeit <lb/>Ströme von elektriſcher Materie durch den kranken Theil <lb/>gehen laſſen.</s>
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5935 <s xml:id="echoid-s3067" xml:space="preserve"/>
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5936 </p>
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5937 <p>
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5938 <s xml:id="echoid-s3068" xml:space="preserve">Die einzige Abhandlung, die wir noch bisher von <lb/>einem Arzte über die mediciniſche Elektricität erhalten ha-<lb/>ben, iſt eine kleine Schrift des Herrn Birch unter dem <lb/>Titul: </s>
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5939 <s xml:id="echoid-s3069" xml:space="preserve">Betrachtungen über die Wirkſamkeit der Elektri-<lb/>cität bey Verſtopfungen der monatlichen Reinigung. </s>
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5940 <s xml:id="echoid-s3070" xml:space="preserve">Ich <lb/>habe dieſem würdigen Manne viele wichtige Beobachtun-<lb/>gen und praktiſche Bemerkungen über verſchiedene zur <lb/>Elektricität gehörige Gegenſtände zu danken. </s>
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5941 <s xml:id="echoid-s3071" xml:space="preserve">Wären <lb/>auch die Vortheile der Elektricität bloß auf dieſe einzige
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5942 <pb o="206" file="0226" n="226" rhead="Sechszehntes Capitel."/>
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5943 Krankheit (bey welcher man ſie für ein ſpecifiſches Mittel <lb/>rechnen kann) eingeſchränkt, ſo würde ſie doch ſchon deswe-<lb/>gen allein die Aufmerkſamkeit der praktiſchen Aerzte ver-<lb/>dienen; </s>
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5944 <s xml:id="echoid-s3072" xml:space="preserve">wir haben aber ſehr viel Urſache, noch weit mehr <lb/>von ihr zu erwarten, da jezt die Vorurtheile der Aerzte <lb/>ausgerottet ſcheinen, und der Gebrauch der Elektricität <lb/>ſich täglich mehr und mehr ausbreitet.</s>
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5945 <s xml:id="echoid-s3073" xml:space="preserve"/>
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5946 </p>
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5947 </div>
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5948 <div xml:id="echoid-div257" type="section" level="1" n="247">
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5949 <head xml:id="echoid-head272" xml:space="preserve">Sechszehntes Capitel. <lb/>Vermiſchte Verſuche und Beobachtungen.</head>
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5950 <p>
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5951 <s xml:id="echoid-s3074" xml:space="preserve">Die Streitigkeit über die Vorzüge der zugeſpitzten <lb/>Blitzableiter vor den ſtumpfgeendeten gab die Ver-<lb/>anlaſſung zu einem elektriſchen Apparatus, der an Pracht <lb/>alle vorher bekannten überttaf. </s>
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5952 <s xml:id="echoid-s3075" xml:space="preserve">Auf Koſten der Admira-<lb/>lität ward unter der Direction des Herrn Wilſon ein <lb/>Conductor von ungeheurer Groöße errichtet und im Pan-<lb/>theon aufgehangen. </s>
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5953 <s xml:id="echoid-s3076" xml:space="preserve">Er beſtand aus einer großen Anzahl <lb/>Trommeln, welche mit Stanniol überzogen waren, und <lb/>einen ohngefähr 155 Schuh langen und mehr als 16 Zoll <lb/>im Durchmeſſer haltenden Cylinder ausmachten; </s>
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5954 <s xml:id="echoid-s3077" xml:space="preserve">dieſem <lb/>großen Cylinder wurden gelegentlich noch 4800 Yards <lb/>Drath beygefügt. </s>
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5955 <s xml:id="echoid-s3078" xml:space="preserve">Der elektriſche Strom aus dieſer <lb/>Maſchine zündete Schießpulver ſelbſt unter den ungünſtig-<lb/>ſten Umſtänden, nämlich wenn er aus einer ſcharfen Spi-<lb/>tze gezogen ward. </s>
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5956 <s xml:id="echoid-s3079" xml:space="preserve">Es geſchahe dies aber auf folgende <lb/>Art. </s>
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5957 <s xml:id="echoid-s3080" xml:space="preserve">Eine meſſingene Säule ward auf einem hölzernen <lb/>Fußbrete befeſtiget, und endigte ſich oben in eine eiſerne <lb/>Spitze; </s>
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5958 <s xml:id="echoid-s3081" xml:space="preserve">dieſe Spitze ward in das Ende einer kleinen pa-<lb/>piernen Rolle geſteckt, welche ohngefähr die Form einer <lb/>Patrone, {2/10} Zoll Durchmeſſer und 1{1/4} Zoll Länge hatte, <lb/>und mit gemeinen Schießpulver gefüllt war: </s>
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5959 <s xml:id="echoid-s3082" xml:space="preserve">an den un-<lb/>tern Theil der meſſingenen Stange ward ein mit der Erde <lb/>verbundener Drath gehangen. </s>
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5960 <s xml:id="echoid-s3083" xml:space="preserve">Die Ladung des großen
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5961 <pb o="207" file="0227" n="227" rhead="Vermiſchte Verſuche."/>
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5962 Cylinders ward durch beſtändiges Umdrehen des Rades <lb/>unterhalten, und der obere Theil der Patrone dem Stan-<lb/>niol genähert, ſo daß er denſelben oft berührte. </s>
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5963 <s xml:id="echoid-s3084" xml:space="preserve">Hiebey <lb/>ſahe man oft einen ſchwachen leuchtenden Strom zwiſchen <lb/>dem obern Theile der Patrone und dem Metalle. </s>
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5964 <s xml:id="echoid-s3085" xml:space="preserve">Bis-<lb/>weilen entzündete dieſer Strom das Schießpulver im er-<lb/>ſten Augenblicke, zu andern Zeiten aber währte es auch <lb/>wohl eine halbe Minute oder drüber, ehe dieſe Wirkung <lb/>erfolgte. </s>
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5965 <s xml:id="echoid-s3086" xml:space="preserve">Dieſen Unterſchied in der Zeit ſchrieb man eini-<lb/>ger im Papiere oder im Pulver enthaltenen Feuchtig-<lb/>keit zu.</s>
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5966 <s xml:id="echoid-s3087" xml:space="preserve"/>
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5967 </p>
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5968 <p>
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5969 <s xml:id="echoid-s3088" xml:space="preserve">Sonſt kann man das Schießpulver auch durch einen <lb/>Strom aus einer großen leidner Flaſche auf folgende Art <lb/>entzünden.</s>
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5970 <s xml:id="echoid-s3089" xml:space="preserve"/>
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5971 </p>
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5972 </div>
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5973 <div xml:id="echoid-div258" type="section" level="1" n="248">
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5974 <head xml:id="echoid-head273" xml:space="preserve">205. Verſuch.</head>
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5975 <p>
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5976 <s xml:id="echoid-s3090" xml:space="preserve">Man befeſtige eine kleine Patrone an eine metallene <lb/>Spitze, welche einen hölzernen oder gläſernen Handgrif <lb/>hac, verbinde die Spitze mit dem Boden, halte hierauf <lb/>die Patrone an den Knopf der Flaſche, ſo wird ſich das <lb/>Schießpulver durch den Uebergang des elektriſchen Stroms <lb/>in die Patrone entzünden. </s>
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5977 <s xml:id="echoid-s3091" xml:space="preserve">Man kann auch Zunder oder <lb/>Schwamm in einer metallenen Schale anzünden, wenn <lb/>man den Strom aus der innern Seite der Flaſche, wie <lb/>im vorigen Verſuche, durch denſelben gehen läßt, ohne <lb/>die Verbindung vollſtändig zu machen.</s>
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5978 <s xml:id="echoid-s3092" xml:space="preserve"/>
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5979 </p>
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5980 <p>
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5981 <s xml:id="echoid-s3093" xml:space="preserve">Da man alſo ſieht, daß die elektriſche Materie die <lb/>Körper entzündet, wenn ſie ſich entweder mit großer <lb/>Geſchwindigkeit oder in großer Menge durch dieſelben be-<lb/>weget, ſo kann man ſchwerlich daran zweiflen, daß dieſe <lb/>Materie mit dem Elemente des Feuers einerley ſey.</s>
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5982 <s xml:id="echoid-s3094" xml:space="preserve"/>
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5983 </p>
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5984 </div>
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5985 <div xml:id="echoid-div259" type="section" level="1" n="249">
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5986 <head xml:id="echoid-head274" xml:space="preserve">206. Verſuch.</head>
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5987 <p>
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5988 <s xml:id="echoid-s3095" xml:space="preserve">Um die kleine elektriſche Canone abzufeuern, lade <lb/>man dieſelbe auf die gewöhnliche Art mit Schießpulver,
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5989 <pb o="208" file="0228" n="228" rhead="Sechszehntes Capitel."/>
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5990 ſchütte Pulver auf das elfenbeinerne Zündloch, ſtampfe <lb/>daſſelbe wohl hinunter, und ſtecke die meſſingene Nadel <lb/>hinein, ſo daß ihr Ende nahe an den Boden der Höhlung <lb/>kömmt. </s>
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5991 <s xml:id="echoid-s3096" xml:space="preserve">Man mache nun eine Verbindung zwiſchen der <lb/>äußern Seite einer geladenen Flaſche oder Batterie und <lb/>dem Körper der Canone, indem man das eine Ende des <lb/>Ausladers an die Nadel, welche in das Zündloch hinein-<lb/>geht, das andere Ende aber an den Knopf der Flaſche ſetzt, <lb/>ſo wird der Schlag das Pulver entzünden.</s>
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5992 <s xml:id="echoid-s3097" xml:space="preserve"/>
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5993 </p>
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5994 </div>
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5995 <div xml:id="echoid-div260" type="section" level="1" n="250">
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5996 <head xml:id="echoid-head275" xml:space="preserve">207. Verſuch.</head>
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5997 <p>
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5998 <s xml:id="echoid-s3098" xml:space="preserve">Fig. </s>
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5999 <s xml:id="echoid-s3099" xml:space="preserve">89. </s>
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6000 <s xml:id="echoid-s3100" xml:space="preserve">zeigt eine perſpectiviſche Abbildung des <lb/>Pulverhauſes, wobey die dem Auge zugekehrte Seiten-<lb/>wand weggelaſſen iſt, damit man das Innere beſſer ſehen <lb/>könne. </s>
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6001 <s xml:id="echoid-s3101" xml:space="preserve">Die Vorderſeite dieſes Modells wird ſo, wie <lb/>beym Donnerhauſe aufgeſtellt, und eben ſo gebraucht; </s>
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6002 <s xml:id="echoid-s3102" xml:space="preserve">die <lb/>Seitenwände, die Vor, und Rückwand ſind durch Ha-<lb/>cken mit dem Boden verbunden; </s>
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6003 <s xml:id="echoid-s3103" xml:space="preserve">das Dach iſt in zwey <lb/>Theile getheilet, welche ebenfalls mit Hacken an die Sei-<lb/>tenwände befeſtiget ſind; </s>
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6004 <s xml:id="echoid-s3104" xml:space="preserve">das Gau<unsure/>ze wird durch einen <lb/>Riegel am Dache zuſammen gehalten; </s>
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6005 <s xml:id="echoid-s3105" xml:space="preserve">wenn das Dach <lb/>herabgeworfen wird, ſo fällt es nebſt allen Wänden zu-<lb/>ſammen. </s>
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6006 <s xml:id="echoid-s3106" xml:space="preserve">Um dieſes Modell zu gebrauchen, fülle man <lb/>die kleine Rohre a mit Schießpulver, und ſtecke den Drath <lb/>c etwas feſt hinein, verbinde den Hacken e mit dem Bo-<lb/>den einer großen Flaſche oder einer Batterie, und mache, <lb/>wenn dieſe geladen iſt, eine Verbindung zwiſchen dem <lb/>Hacken d und dem Knopfe der Flaſche, ſo wird der <lb/>Schlag das Pulver entzünden, die Erploſion deſſelben <lb/>wird das Dach abwerfen, und die Seitenwände, Vor-<lb/>und Rückwand werden zuſammenfallen.</s>
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6007 <s xml:id="echoid-s3107" xml:space="preserve"/>
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6008 </p>
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6009 <p>
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6010 <s xml:id="echoid-s3108" xml:space="preserve">Fig. </s>
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6011 <s xml:id="echoid-s3109" xml:space="preserve">90. </s>
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6012 <s xml:id="echoid-s3110" xml:space="preserve">iſt eine hölzerne Pyramide, welche zu den <lb/>Verſuchen mit dem Donnerhauſe beſtimmt iſt, und auf <lb/>ebendieſelbe Art gebraucht wird. </s>
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6013 <s xml:id="echoid-s3111" xml:space="preserve">Wenn durch die Ent-<lb/>ladung das Stück a heraus geſchlagen wird, ſo fällt der <lb/>obere Theil der Pyramide herab.</s>
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6014 <s xml:id="echoid-s3112" xml:space="preserve"/>
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6015 </p>
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6016 <pb o="209" file="0229" n="229" rhead="Vermiſchte Verſuche."/>
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6017 </div>
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6018 <div xml:id="echoid-div261" type="section" level="1" n="251">
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6019 <head xml:id="echoid-head276" xml:space="preserve">208. Verſuch.</head>
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6020 <p>
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6021 <s xml:id="echoid-s3113" xml:space="preserve">Man befeſtige den Löffel I, Fig. </s>
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6022 <s xml:id="echoid-s3114" xml:space="preserve">33. </s>
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6023 <s xml:id="echoid-s3115" xml:space="preserve">in die Höh-<lb/>lung am Ende des Conductors, lege ein kleines Stück <lb/>Campher in denſelben, zünde es an, und drehe das Rad <lb/>der Maſchine, ſo wird der Campher eine Menge kleine <lb/>Zweige ausſenden, und eine Art von unvollkommener <lb/>Vegetation darſtellen.</s>
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6024 <s xml:id="echoid-s3116" xml:space="preserve"/>
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6025 </p>
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6026 </div>
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6027 <div xml:id="echoid-div262" type="section" level="1" n="252">
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6028 <head xml:id="echoid-head277" xml:space="preserve">209. Verſuch.</head>
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6029 <p>
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6030 <s xml:id="echoid-s3117" xml:space="preserve">Man wickle etwas lockere Baumwolle, welche man <lb/>vorher in fein geſtoßenem Colophonium herumgerollet hat, <lb/>um eine von den Kugeln eines Ausladers, halte das an-<lb/>dere Ende deſſelben an die äußere Belegung einer gelade-<lb/>nen Flaſche, und bringe die umwickelte Kugel gegen den <lb/>Knopf der Flaſche, ſo wird ſich das Colophonium durch <lb/>die Entladung entzünden, und die Baumwolle anbrennen.</s>
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6031 <s xml:id="echoid-s3118" xml:space="preserve"/>
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6032 </p>
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6033 <p>
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6034 <s xml:id="echoid-s3119" xml:space="preserve">Fig. </s>
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6035 <s xml:id="echoid-s3120" xml:space="preserve">91. </s>
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6036 <s xml:id="echoid-s3121" xml:space="preserve">zeigt die von Herrn Volta erfundene Lam-<lb/>pe mit entzündbarer Luſt. </s>
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6037 <s xml:id="echoid-s3122" xml:space="preserve">A iſt eine gläſerne Kugel zur <lb/>entzündbaren Luft, B ein gläſernes Becken oder Behält-<lb/>niß, um Waſſer hineinzugießen; </s>
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6038 <s xml:id="echoid-s3123" xml:space="preserve">D cin Hahn, um erfor-<lb/>derlichen Falls eine Communication zwiſchen dem Waſſer-<lb/>behältniß B und dem Luftbehältniß A zu eröfnen; </s>
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6039 <s xml:id="echoid-s3124" xml:space="preserve">das <lb/>Waſſer geht in das letztere durch die metallene Röhre gg, <lb/>welche an den obern Theil des Behältniſſes A befeſtiget <lb/>iſt; </s>
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6040 <s xml:id="echoid-s3125" xml:space="preserve">s iſt ein kleiner Hahn, um die Communication zwi-<lb/>ſchen der Luft in der Kugel und dem Sprungrohre K zu <lb/>verſchließen oder zu eröfnen. </s>
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6041 <s xml:id="echoid-s3126" xml:space="preserve">N iſt eine kleine Spitze, <lb/>worauf man ein Stück Wachslicht ſetzen kann; </s>
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6042 <s xml:id="echoid-s3127" xml:space="preserve">L eine <lb/>meſſingene Säule, oben mit einer meſſingenen Kugel ver-<lb/>ſehen; </s>
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6043 <s xml:id="echoid-s3128" xml:space="preserve">a eine Glasſäule, oben mit einer Hülſe, in welcher <lb/>ſich der Drath b hin und her ſchieben läßt, ans Ende die-<lb/>ſes Draths läßt ſich eine Kugel anſchrauben. </s>
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6044 <s xml:id="echoid-s3129" xml:space="preserve">F iſt del <lb/>Hahn, durch welchen die Kugel A mit entzündbarer Luft <lb/>gefüllt werden kann, und welcher hernach dienet, um die <lb/>Luſt, und das Waſſer, welches aus dem Baſſin B in die <lb/>Kugel A fällt, zu verſchließen.</s>
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6045 <s xml:id="echoid-s3130" xml:space="preserve"/>
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6046 </p>
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6047 <pb o="210" file="0230" n="230" rhead="Sechszehntes Capitel."/>
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diff changeset
6048 <p>
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6049 <s xml:id="echoid-s3131" xml:space="preserve">Um dieſes Inſtrument zu gebrauchen, fülle man <lb/>das Behältniß A mit reiner entzündbarer Luft, und das <lb/>Baſſin B mit Waſſer, und drehe die Hähne D und s auf, <lb/>ſo wird das aus B herabfallende Waſſer entzündbare Luft <lb/>aus A heraus, und durch die Sprungröhre K in die Luft <lb/>treiben. </s>
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6050 <s xml:id="echoid-s3132" xml:space="preserve">Läßt man einen elektriſchen Funken aus der <lb/>meſſingenen Kugel m in die Kugel n gehen, ſo wird der <lb/>brennbare Luftſtral, der aus der Röhre K hervorgeht, ent-<lb/>zündet. </s>
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6051 <s xml:id="echoid-s3133" xml:space="preserve">Um die Lampe auszulöſchen, verſchließe man <lb/>zuerſt den Hahn s, und dann den Hahn D.</s>
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6052 <s xml:id="echoid-s3134" xml:space="preserve"/>
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diff changeset
6053 </p>
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diff changeset
6054 <p>
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6055 <s xml:id="echoid-s3135" xml:space="preserve">Um das Behältniß A mit brennbarer Luft zu <lb/>füllen, welche auf die gewöhnliche Art und mit dem <lb/>gewöhnlichen Apparatus zubereitet wird, fülle man <lb/>vorläufig A mit Waſſer, ſtelle den Fuß R unter Waſ-<lb/>ſer auf ein Bret in einer großen mit Waſſer gefüll-<lb/>ten Wanne, damit die gebogne Glasröhre, durch wel-<lb/>che die brennbare Luft geht, bequem unter den Fuß der <lb/>Lampe gebracht werden könne. </s>
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6056 <s xml:id="echoid-s3136" xml:space="preserve">Wenn die Luft faſt alles <lb/>Waſſer ausgetrieben hat, drehe man den Hahn F zu, ſo <lb/>iſt der Apparatus zum Gebrauch fertig. </s>
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6057 <s xml:id="echoid-s3137" xml:space="preserve">Man kann die-<lb/>ſes Inſtrument auch ſehr bequem gebrauchen, um eine <lb/>Quantität brennbare Luft zu gelegentlichen Verſuchen, <lb/>z. </s>
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6058 <s xml:id="echoid-s3138" xml:space="preserve">B. </s>
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6059 <s xml:id="echoid-s3139" xml:space="preserve">zu Ladung der elektriſchen Piſtole 2c<unsure/>. </s>
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6060 <s xml:id="echoid-s3140" xml:space="preserve">leicht aufzube, <lb/>wahren. </s>
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6061 <s xml:id="echoid-s3141" xml:space="preserve">Auch iſt es bequem ein Licht zum gemeinen Ge-<lb/>brauche daran anzuzünden, da der geringſte Funken aus <lb/>einem Elektrophor, oder einer kleinen Flaſche ſchon hinrei-<lb/>chend iſt, die brennbare Luft zu entzünden.</s>
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6062 <s xml:id="echoid-s3142" xml:space="preserve"/>
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6063 </p>
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diff changeset
6064 <p>
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6065 <s xml:id="echoid-s3143" xml:space="preserve">Man kann auch nach Gelegenheit eine kleine Batte-<lb/>rie von Piſtolen mit brennbarer Luft machen, wodurch <lb/>man ſich viel Vergnügen verſchaffen kann, da man ent-<lb/>weder eine Piſtole nach der andern, oder alle zuſammen, <lb/>nach Gefallen abfeuern kann.</s>
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6066 <s xml:id="echoid-s3144" xml:space="preserve"/>
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6067 </p>
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6068 <p>
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6069 <s xml:id="echoid-s3145" xml:space="preserve">Folgenden Verſuch hat Herr Kinnersley mit ſei-<lb/>nem elektriſchen Luftthermometer angeſtellt, welches wir <lb/>oben im zweyten Capitel S. </s>
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6070 <s xml:id="echoid-s3146" xml:space="preserve">26 beſchrieben haben.</s>
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6071 <s xml:id="echoid-s3147" xml:space="preserve"/>
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6072 </p>
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6073 <pb o="211" file="0231" n="231" rhead="Vermiſchte Verſuche."/>
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6074 </div>
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6075 <div xml:id="echoid-div263" type="section" level="1" n="253">
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6076 <head xml:id="echoid-head278" xml:space="preserve">210. Verſuch.</head>
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6077 <p>
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6078 <s xml:id="echoid-s3148" xml:space="preserve">Er hatte in die weite Röhre ſeines Luftthermome-<lb/>ters etwas gefärbtes Waſſer gegoſſen, ſtellte die beyden in <lb/>der Röhre befindlichen Dräthe mit einander in Berüh-<lb/>rung und ließ eine ſtarke elektriſche Ladung von ohngefähr <lb/>30 Quadratfuß belegter Fläche hindurchgehen, welche <lb/>aber keine Ausdehnung der Luft hervorbrachte, und alſo <lb/>zeigte, daß die Dräthe bey dem Durchgange der elektri-<lb/>ſchen Materie nicht erhitzt wurden. </s>
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6079 <s xml:id="echoid-s3149" xml:space="preserve">Standen aber die <lb/>Dräthe etwa zween Zoll weit von einander, ſo ward die <lb/>Luft durch die Entladung einer Drey – Pinten – Flaſche <lb/>merklich verdünnet und ausgedehnet. </s>
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6080 <s xml:id="echoid-s3150" xml:space="preserve">Der Schlag aus <lb/>einer Flaſche, welche ohngefähr 5{1/2} Gallons enthielt, ver-<lb/>anlaſſete eine ſehr beträchtliche Ausdehnung der Luft; </s>
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6081 <s xml:id="echoid-s3151" xml:space="preserve">und <lb/>der aus einer Batterie von 30 Quadratſchuh belegter <lb/>Glasfläche würde das Waſſer in der kleinen Röhre bis <lb/>ganz an die Spitze hinauf treiben. </s>
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6082 <s xml:id="echoid-s3152" xml:space="preserve">Wenn die Luft ſich <lb/>nicht weiter ausdehnet, ſo bleibt die Waſſerſäule einen <lb/>Augenblick ſtehen, bis ſie mit der verdünnten Luft im <lb/>Gleichgewicht iſt; </s>
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6083 <s xml:id="echoid-s3153" xml:space="preserve">alsdann fällt ſie wieder nach und nach <lb/>bis an ihren vorigen Ort, indem ſich die Luft abkühlet. <lb/></s>
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6084 <s xml:id="echoid-s3154" xml:space="preserve">Wenn man genau bemerkt, in welcher Höhe das Waſſer <lb/>zuerſt ſtehen bleibt, ſo kann man den Grad der Verdün-<lb/>nung leicht beſtimmen.</s>
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6085 <s xml:id="echoid-s3155" xml:space="preserve"/>
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6086 </p>
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6087 </div>
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6088 <div xml:id="echoid-div264" type="section" level="1" n="254">
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6089 <head xml:id="echoid-head279" xml:space="preserve">211. Verſuch.</head>
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6090 <p>
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6091 <s xml:id="echoid-s3156" xml:space="preserve">Man nehme eine Glasröhre, etwa 4 Zoll lang und <lb/>{1/4} Zoll im Durchmeſſer, welche an beyden Enden offen iſt; <lb/></s>
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6092 <s xml:id="echoid-s3157" xml:space="preserve">befeuchte ihre innern Wände mit zerfloſſenem Weinſteinöl <lb/>(Oleum Tartari per deliquium), ſtecke zwey Stücke <lb/>Kork in die Enden der Röhre, und durch jedes einen <lb/>Drath, ſo daß die Enden der Dräthe innerhalb der Röhre <lb/>ohngefähr {3/4} Zoll aus einander kommen. </s>
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6093 <s xml:id="echoid-s3158" xml:space="preserve">Den einen <lb/>Drath verbinde man mit der äußern Belegung einer gela-<lb/>denen Flaſche, und den andern mit dem Knopfe derſelben, <lb/>ſo daß die Entladung der Flaſche durch die Röhre geht;</s>
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6094 <s xml:id="echoid-s3159" xml:space="preserve">
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6095 <pb o="212" file="0232" n="232" rhead="Sechszehntes Capitel."/>
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6096 man wiederhole dieſes einigemahl, ſo wird das Wein-<lb/>ſteinöl ſehr oft deutliche Merkmale einer Cryſtalliſation <lb/>zeigen.</s>
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6097 <s xml:id="echoid-s3160" xml:space="preserve"/>
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6098 </p>
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6099 </div>
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6100 <div xml:id="echoid-div265" type="section" level="1" n="255">
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6101 <head xml:id="echoid-head280" xml:space="preserve">212. Verſuch.</head>
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6102 <p>
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6103 <s xml:id="echoid-s3161" xml:space="preserve">Man lade eine leidner Flaſche (deren Knopf in die <lb/>Flaſche eingeküttet iſt), ſtelle ſie auf ein iſolirendes Sta-<lb/>tiv, hebe ſie beym Knopfe auf, und halte die äußere Be-<lb/>legung gegen die condenſirende Kugel eines erſten Leiters, <lb/>indem die Maſchine gedrehet wird, ſo wird ein langer <lb/>Stralenbüſchel und Funken zwiſchen der Belegung der <lb/>Flaſche und der Kugel des erſten Leitcrs entſtehen, deſſen <lb/>Länge 4 — 12 Zoll und drüber betragen wird.</s>
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6104 <s xml:id="echoid-s3162" xml:space="preserve"/>
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6105 </p>
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6106 </div>
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6107 <div xml:id="echoid-div266" type="section" level="1" n="256">
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6108 <head xml:id="echoid-head281" xml:space="preserve">213. Verſuch.</head>
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6109 <p>
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6110 <s xml:id="echoid-s3163" xml:space="preserve">Man nehme etwas geſtoßenen Cantonſchen Phoſpho-<lb/>rus, und ſtreiche ihn, mit etwas Weingeiſt vermiſcht, über <lb/>die ganze innere Seite einer reinen gläſernen Phiole, ver-<lb/>ſtopfe dieſelbe, und entferne ſie vom Lichte. </s>
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6111 <s xml:id="echoid-s3164" xml:space="preserve">Wenn man <lb/>einige ſtarke Funken aus einem Conductor zieht, und die <lb/>Phiole 2 — 3 Zoll von dieſen Funken abhält, daß das <lb/>Licht der Funken auf ſie fallen kann, ſo wird die Phiole <lb/>leuchten, und dies eine lange Zeit fortſetzen.</s>
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6112 <s xml:id="echoid-s3165" xml:space="preserve"/>
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6113 </p>
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6114 </div>
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6115 <div xml:id="echoid-div267" type="section" level="1" n="257">
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6116 <head xml:id="echoid-head282" xml:space="preserve">214. Verſuch.</head>
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6117 <p>
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6118 <s xml:id="echoid-s3166" xml:space="preserve">Man entlade eine Flaſche über ein dünnes Stückgen <lb/>Holz, welches die Geſtalt eines halben Monds hat, und <lb/>mit dem gedachten Phoſphorus beſtrichen iſt, ſo wird der <lb/>halbe Mond im Finſtern leuchten.</s>
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6119 <s xml:id="echoid-s3167" xml:space="preserve"/>
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6120 </p>
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6121 <p>
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6122 <s xml:id="echoid-s3168" xml:space="preserve">Man lege einen kleinen Schlüſſel auf den Phoſpho-<lb/>rus, entlade eine leidner Flaſche über denſelben, und neh-<lb/>me den Schlüſſel herab, ſo wird ſich im Finſtern die <lb/>Form des Schlüſſels mit allen ſeinen Theilen vollkommen <lb/>deutlich zeigen.</s>
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6123 <s xml:id="echoid-s3169" xml:space="preserve"/>
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6124 </p>
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6125 <p>
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6126 <s xml:id="echoid-s3170" xml:space="preserve">Da die Verſuche mit dem Phoſphorus nicht allein <lb/>an ſich ſehr merkwürdig ſind, ſondern auch mit der Natur <lb/>der Elektricität in der genauſten Verbindung zu ſtehen
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6127 <pb o="213" file="0233" n="233" rhead="Vermiſchte Verſuche."/>
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6128 ſcheinen, ſo hoffe ich mich nicht allzuweit von dem Gegen-<lb/>ſtande dieſes Werks zu entfernen, wenn ich noch einige <lb/>von Herrn Wilſon hierüber angeſtellte Verſuche anfüh-<lb/>re; </s>
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6129 <s xml:id="echoid-s3171" xml:space="preserve">und dies um deſto mehr, da die Hervorbringung der <lb/>prismatiſchen Farben keinesweges ſchwer iſt, und nichts <lb/>weiter, als einige Auſterſchalen und ein ſtarkes Feuer er-<lb/>fordert. </s>
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6130 <s xml:id="echoid-s3172" xml:space="preserve">Denn wenn dieſe Schalen nur ganz nachläßig <lb/>mitten ins Feuer geworfen, und die gehörige Zeit über <lb/>darinn gelaſſen werden (welche Zeit von 10 Min, einer <lb/>bis 2 oder 3 Viertelſtunden, bis 1, 2, 3 Stunden <lb/>geht, je nachdem die Schalen ſtärker und dichter ſind, <lb/>und der Grad des Feuers größer oder getinger iſt), ſo <lb/>zeigen ſie ſehr lebhafte prismatiſche Farben, wenn män <lb/>ſie aus der Sonne plötzlich ins Dunkle bringt, und die <lb/>Augen vorher ein wenig vorbereitet ſind. </s>
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6131 <s xml:id="echoid-s3173" xml:space="preserve">Herr Wilſon <lb/>erregte das Licht dieſer Schalen durch die Elektricität auf <lb/>folgende Art.</s>
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6132 <s xml:id="echoid-s3174" xml:space="preserve"/>
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6133 </p>
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6134 </div>
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6135 <div xml:id="echoid-div268" type="section" level="1" n="258">
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6136 <head xml:id="echoid-head283" xml:space="preserve">215. Verſuch.</head>
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6137 <p>
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6138 <s xml:id="echoid-s3175" xml:space="preserve">Er ſtellte eine präparirte Auſterſchale, welche die <lb/>prismatiſchen Farben ſehr lebhaft zeigte, auf ein metalle-<lb/>nes, oben abgerundetes Stativ, welches ohngefähr einen <lb/>halben Zoll im Durchmeſſer hatte; </s>
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6139 <s xml:id="echoid-s3176" xml:space="preserve">an die Oberfläche die-<lb/>ſer Schale, und nahe an das Mittel, wo die farbenerre-<lb/>genden Theile am häufigſten beyſammen waren, brachte <lb/>er das Ende eines metallenen Stabs, und verband hier-<lb/>auf beyde Metalle gehörig mit den Belegungen einer ge-<lb/>ladenen Flaſche, als ob er dieſelbe entladen wollte. </s>
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6140 <s xml:id="echoid-s3177" xml:space="preserve">Doch <lb/>ließ er in dieſer Verbindung mit Vorſatz eine Lücke von <lb/>etwa drey Zollen zunächſt an der einen Seite des Glaſes; <lb/></s>
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6141 <s xml:id="echoid-s3178" xml:space="preserve">die Entladung erfolgte, ſobald er dieſe Lücke mit Metall <lb/>ausfüllte. </s>
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6142 <s xml:id="echoid-s3179" xml:space="preserve">Im Augenblicke der Entladung ſelbſt fieng <lb/>die Schale an mit der größten Schönheit zu leuchten, ſo <lb/>daß alle Farben vollkommen deutlich erſchienen, und jede <lb/>nach der verſchiedenen Lage der farben – erregenden Theile <lb/>an ihrer gehörigen Stclle ſtand. </s>
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6143 <s xml:id="echoid-s3180" xml:space="preserve">Dieſe Farben blieben
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6144 <pb o="214" file="0234" n="234" rhead="Sechszehntes Capitel."/>
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6145 einige Minuten lang ſichtbar, und wenn ſie verſchwanden, <lb/>ſo trat ein weißliches und ins purpurrothe fallendes Licht <lb/>an ihre Stelle, welches eine lange Zeit anhielt. </s>
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6146 <s xml:id="echoid-s3181" xml:space="preserve">Und wenn <lb/>gleich der Verſuch mit ebenderſelben oder andern Schalen <lb/>einigemahl wiederholet wurde, ſo blieben doch die Farben <lb/>an ihren gehörigen Stellen, und behielten faſt ebendenſel-<lb/>ben Grad des Glanzes; </s>
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6147 <s xml:id="echoid-s3182" xml:space="preserve">nur wurden bisweilen in der Ge-<lb/>gend, wodurch der Schlag gieng, einige Schuppen abge-<lb/>ſchlagen.</s>
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6148 <s xml:id="echoid-s3183" xml:space="preserve"/>
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6149 </p>
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6150 </div>
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6151 <div xml:id="echoid-div269" type="section" level="1" n="259">
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6152 <head xml:id="echoid-head284" xml:space="preserve">216. Verſuch.</head>
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6153 <p>
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6154 <s xml:id="echoid-s3184" xml:space="preserve">Körper von einerley Art, aber von verſchiedenen <lb/>Groößen und Maſſen, werden mit elektriſcher Materie bloß <lb/>in Proportion ihrer Oberfläche geladen, ohne daß die <lb/>Größe der Maſſe in dieſem Falle einigen Einfluß oder <lb/>Mitwirkung zeigt.</s>
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6155 <s xml:id="echoid-s3185" xml:space="preserve"/>
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6156 </p>
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6157 <p>
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6158 <s xml:id="echoid-s3186" xml:space="preserve">Die Naturforſcher ſind zwar hierüber ſehr verſchie-<lb/>dener Meinung geweſen; </s>
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6159 <s xml:id="echoid-s3187" xml:space="preserve">aber folgender Verſuch, den ich <lb/>mit Herrn Achard’s eignen Worten vortragen will, <lb/>ſcheint die Frage völlig zu entſcheiden.</s>
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6160 <s xml:id="echoid-s3188" xml:space="preserve"/>
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6161 </p>
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6162 <p>
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6163 <s xml:id="echoid-s3189" xml:space="preserve">Ich elektriſirte, ſagt er, einen hohlen cylindriſchen <lb/>meſſingenen Conductor, der 7 Zoll lang war, und 1{1/2} Zoll <lb/>im Durchmeſſer hatte. </s>
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6164 <s xml:id="echoid-s3190" xml:space="preserve">Als er 40 Grad Elektricität er-<lb/>halten hatte, zog ich einen Funken aus ihm, mit einem <lb/>ebenfalls 7 Zoll langen und 1{1/2} Zoll im Durchmeſſer hal-<lb/>tenden hohlen meſſingenen Conductor, welcher acht Unzen <lb/>wog, und ſorgfältig iſolirt war. </s>
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6165 <s xml:id="echoid-s3191" xml:space="preserve">Der erſte Conductor <lb/>verlor dadurch 15 Grad Elektricität. </s>
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6166 <s xml:id="echoid-s3192" xml:space="preserve">Ich wiederholte <lb/>den Verſuch, da der Conductor 30 Grad Elektricität hat-<lb/>te, und hiebey verlor er 10 Grad. </s>
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6167 <s xml:id="echoid-s3193" xml:space="preserve">Endlich, wenn er <lb/>nur 20 Grad hatte, verlor er durch eine augenblickliche <lb/>Berührung mit eben demſelben Cylinder nur 7 Grad. <lb/></s>
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6168 <s xml:id="echoid-s3194" xml:space="preserve">Ich füllte nunmehr dieſen Cylinder mit Bley aus, wo-<lb/>durch er um 5 Pfund ſchwerer ward, und alſo eben ſoviel <lb/>Maſſe mehr erhielt, wiederholte eben dieſelben Verſuche, <lb/>und erhielt noch immer eben dieſelben Reſultate.</s>
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6169 <s xml:id="echoid-s3195" xml:space="preserve"/>
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6170 </p>
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6171 <pb o="215" file="0235" n="235" rhead="Vermiſchte Verſuche."/>
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6172 <p>
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6173 <s xml:id="echoid-s3196" xml:space="preserve">Es folgen hierauf noch andere Verſuche, welche <lb/>Herrn Achard’s Meynung noch mehr beſtätigen.</s>
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6174 <s xml:id="echoid-s3197" xml:space="preserve"/>
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6175 </p>
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6176 <p>
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6177 <s xml:id="echoid-s3198" xml:space="preserve">Dieſe Verſuche zeigen, 1) daß Körper von gleichen <lb/>Oberflächen, aber verſchiedenen Maſſen, unter gleichen <lb/>Umſtänden mit gleichen Mengen von elektriſcher Ma-<lb/>terie geladen werden; </s>
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6178 <s xml:id="echoid-s3199" xml:space="preserve">2) daß Körper von gleichen <lb/>Maſſen, aber verſchiedenen Oberflächen, unter übrigens <lb/>gleichen Umſtänden mit ungleichen Mengen von elektri-<lb/>ſcher Materie geladen werden, und daß der Körper von <lb/>größerer Oberfläche ſtärker geladen wird, als der von ge-<lb/>ringerer Oberfläche. </s>
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6179 <s xml:id="echoid-s3200" xml:space="preserve">Daher erhalten die Körper mehr <lb/>oder weniger Elektricität, nicht in Proportion ihrer Maſ-<lb/>ſen, ſondern in Proportion ihrer Oberflächen.</s>
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6180 <s xml:id="echoid-s3201" xml:space="preserve"/>
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6181 </p>
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6182 <p>
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6183 <s xml:id="echoid-s3202" xml:space="preserve">Noch ehe dieſe Verſuche angeſtellt wurden, hatte <lb/>man bemerkt, daß die ungemeine Feinheit und die in den <lb/>meiſten Fällen ſtatt findende Unſichtbarkeit der elektriſchen <lb/>Materie, alle Beobachtungen und Muthmaßungen über <lb/>ihre Geſchwindigkeit unmöglich mache. </s>
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6184 <s xml:id="echoid-s3203" xml:space="preserve">Inzwiſchen iſt <lb/>es doch unglaublich, daß dieſe Materie durch die wirkli-<lb/>che Subſtanz metalliſcher Körper durchgehen, und doch <lb/>durch ihre feſten Theile nicht aufgehalten werden ſollte. <lb/></s>
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6185 <s xml:id="echoid-s3204" xml:space="preserve">In ſolchen Fällen, wo die feſten Theile der Metalle wirk-<lb/>lich und augenſcheinlich durchdrungen werden, z. </s>
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6186 <s xml:id="echoid-s3205" xml:space="preserve">B. </s>
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6187 <s xml:id="echoid-s3206" xml:space="preserve">wenn <lb/>der elektriſche Schlag durch Drath geht, ſieht man den <lb/>Widerſtand deutlich, denn die Theile des Draths werden <lb/>mit Gewalt nach allen Richtungen aus einander geworfen <lb/>und zerſtreuet.</s>
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6188 <s xml:id="echoid-s3207" xml:space="preserve"/>
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6189 </p>
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6190 <p>
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6191 <s xml:id="echoid-s3208" xml:space="preserve">Eben dies geſchahe bey den Ringen, welche D. <lb/></s>
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6192 <s xml:id="echoid-s3209" xml:space="preserve">Ptieſtley auf glatte Stücken Metall ſchlug. </s>
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6193 <s xml:id="echoid-s3210" xml:space="preserve">Es ward <lb/>ein Theil des Metalls zerſtreut und heraus geworfen, denn <lb/>die cirkelrunden Flecke beſtanden aus lauter kleinen Lö-<lb/>chern. </s>
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6194 <s xml:id="echoid-s3211" xml:space="preserve">Wenn daher die elektriſche Materie durch die <lb/>Subſtanz der Meralle, und nicht über ihre Oberfläche <lb/>gienge, ſo müſſe augenſcheinlich ein Drath, deſſen Durch-<lb/>meſſer einem ſolchen cirkelrunden Flecke gleich wäre, durch <lb/>eine Erploſion von gleicher Stärke ebenfalls zerſchmettert
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6195 <pb o="216" file="0236" n="236" rhead="Sechszehntes Capitel."/>
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6196 werden; </s>
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6197 <s xml:id="echoid-s3212" xml:space="preserve">da doch ein Drath, deſſen Durchmeſſer dem <lb/>Durchmeſſer eines ſolchen runden Fleckens gleich iſt, einen <lb/>weit ſtärkern Schlag, als irgend eine bis hieher verfertigte <lb/>Batterie zu geben im Stande iſt, ohne die geringſte Be-<lb/>ſchädigung fortleitet. </s>
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6198 <s xml:id="echoid-s3213" xml:space="preserve">Es iſt daher ſehr wahrſcheinlich, <lb/>daß, obgleich ſtarke elektriſche Schläge, welche überhaupt <lb/>wie Feuer wirken, in die Subſtanz der Metalle eindrin-<lb/>gen und dieſelbe verzehren, dennoch die Elektricität ſich <lb/>über die Oberfläche der Metalle verbreite, und nicht eher <lb/>in die Subſtanz derſelben eindringe, als bis ſie gezwun-<lb/>gen wird, ſich in einen engen Raum zuſammen zu drän-<lb/>gen, wobey ſie alsdann, wie Feuer, wirkt.</s>
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6199 <s xml:id="echoid-s3214" xml:space="preserve"/>
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6200 </p>
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6201 <p>
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6202 <s xml:id="echoid-s3215" xml:space="preserve">In vielen Fällen wird die Elektricität durch Metalle, <lb/>welche faſt auf bloße Oberfläche reducirt ſind, ſehr wohl <lb/>geleitet. </s>
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6203 <s xml:id="echoid-s3216" xml:space="preserve">Ein weißes Papier, da es ein elektriſcher Kör-<lb/>per iſt, leitet keinen Schlag, ohne dadurch zerriſſen zu <lb/>werden; </s>
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6204 <s xml:id="echoid-s3217" xml:space="preserve">aber eine mit Bleyſtift darauf gezogne Linie lei-<lb/>tet unbeſchädigt die Ladung mehrerer Flaſchen. </s>
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6205 <s xml:id="echoid-s3218" xml:space="preserve">Unmög-<lb/>lich können wir hiebey annehmen, daß die elektriſche Ma-<lb/>terie durch die Subſtanz des Bleyſtiftſtrichs gehe; </s>
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6206 <s xml:id="echoid-s3219" xml:space="preserve">ſie <lb/>muß über die Oberfläche deſſelben fließen. </s>
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6207 <s xml:id="echoid-s3220" xml:space="preserve">Und, wenn <lb/>wir einige Eigenſchaften der Metalle in Betrachtung zie-<lb/>hen, ſo finden wir große Urſache anzunehmen, daß ihre <lb/>leitende Kraft in ihrer Oberfläche liege.</s>
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6208 <s xml:id="echoid-s3221" xml:space="preserve"/>
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6209 </p>
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6210 <p>
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6211 <s xml:id="echoid-s3222" xml:space="preserve">Fig. </s>
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6212 <s xml:id="echoid-s3223" xml:space="preserve">92. </s>
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6213 <s xml:id="echoid-s3224" xml:space="preserve">zeigt eine kleine Glasröhre, an einem En-<lb/>de mit Kork verſtopft; </s>
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6214 <s xml:id="echoid-s3225" xml:space="preserve">K iſt ein Drath, der durch einen <lb/>andern Kork geht, welcher in das andere Ende der Röhre <lb/>befeſtiget iſt. </s>
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6215 <s xml:id="echoid-s3226" xml:space="preserve">Am obern Ende des Draths befindet ſich <lb/>eine meſſingene Kugel, das innerhalb der Röhre befind-<lb/>liche Ende iſt unter einem rechten Winkel umgebogen.</s>
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6216 <s xml:id="echoid-s3227" xml:space="preserve"/>
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6217 </p>
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6218 </div>
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6219 <div xml:id="echoid-div270" type="section" level="1" n="260">
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6220 <head xml:id="echoid-head285" xml:space="preserve">217. Verſuch.</head>
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6221 <p>
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6222 <s xml:id="echoid-s3228" xml:space="preserve">Man nehme den obern Kork mit dem Drathe her-<lb/>aus, gieße etwas Oel in die Röhre, paſſe den Kork wie-<lb/>der ein, und ſtoße den Drath hinab, bis das Ende an oder <lb/>lieber etwas unter der Oberfläche des Oels ſteht. </s>
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6223 <s xml:id="echoid-s3229" xml:space="preserve">Wenn
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6224 <pb o="217" file="0237" n="237" rhead="Vermiſchte Verſuche."/>
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6225 man nun die Kugel gegen den erſten Leiter einer Maſchine <lb/>hält, und den Finger oder einen andern leitenden Körper <lb/>dem gebognen Ende des Draths gegen über bringt, ſo <lb/>wird ein Funken aus dem Leiter der Maſchine in die meſ-<lb/>ſingene Kugel, ein anderer aber zugleich aus dem Ende <lb/>des Draths hervorgehen und das Glas durchbohren, wo-<lb/>bey das Oel auf eine beſondere Art bewegt wird.</s>
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6226 <s xml:id="echoid-s3230" xml:space="preserve"/>
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6227 </p>
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6228 <p>
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6229 <s xml:id="echoid-s3231" xml:space="preserve">Dieſer Verſuch gewinnt ein weit ſchöneres Anſehen, <lb/>wenn er im Dunkeln angeſtellt wird. </s>
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6230 <s xml:id="echoid-s3232" xml:space="preserve">Wenn das erſte <lb/>Loch ins Glas geſchlagen iſt, drehe man das Ende des <lb/>Draths in die Runde gegen eine andere Stelle der Glas-<lb/>röhre, ſo wird auf eben dieſe Art ein zweytes Loch geſchla-<lb/>gen. </s>
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6231 <s xml:id="echoid-s3233" xml:space="preserve">Dieſen Verſuch habe ich dem Herrn Morgan <lb/>von Norwich zu danken, der denſelben noch weiter getrie-<lb/>ben, kleine Flaſchen mit Kütt ausgefüllet, und dann auf <lb/>ähnliche Art den Schlag durch dieſelben geführt hat. <lb/></s>
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6232 <s xml:id="echoid-s3234" xml:space="preserve">Man kann die Glasröhre auch durchlöchern, wenn ſich <lb/>gleich nur Waſſer anſtatt des Oels in derſelben befindet.</s>
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6233 <s xml:id="echoid-s3235" xml:space="preserve"/>
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6234 </p>
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6235 <p>
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6236 <s xml:id="echoid-s3236" xml:space="preserve">Herr Cullen hat durch den Schlag in Röhren mit <lb/>Oel ſehr beträchtliche Wirkungen hervorgebracht. </s>
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6237 <s xml:id="echoid-s3237" xml:space="preserve">Der <lb/>Funken ſcheint im Oele groößer, als wenn er durch Waſſer <lb/>geht.</s>
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6238 <s xml:id="echoid-s3238" xml:space="preserve"/>
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6239 </p>
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6240 <p>
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6241 <s xml:id="echoid-s3239" xml:space="preserve">Herr de Villette füllte einen metallenen Teller mit <lb/>Oel, elektriſirte denſelben und tauchte eine Nadel ins Oel. <lb/></s>
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6242 <s xml:id="echoid-s3240" xml:space="preserve">Er erhielt einen ſehr ſtarken Funken, ſobald die Spitze der <lb/>Nadel dem Teller nahe kam. </s>
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6243 <s xml:id="echoid-s3241" xml:space="preserve">Er ließ eine kleine Korkku-<lb/>gel auf dem Oele ſchwimmen; </s>
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6244 <s xml:id="echoid-s3242" xml:space="preserve">als er derſelben das dicke <lb/>Ende eines Stengels von Lindenholz näherte, ſenkte ſie ſich <lb/>zu Boden, ſtieg aber ſogleich wieder in die Höhe.</s>
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6245 <s xml:id="echoid-s3243" xml:space="preserve"/>
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6246 </p>
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6247 <p>
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6248 <s xml:id="echoid-s3244" xml:space="preserve">Mit dem Verſuche des Herrn Morgan haben ei-<lb/>nige Beobachtungen des D. </s>
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6249 <s xml:id="echoid-s3245" xml:space="preserve">Prieſtley Aehnlichkeit. <lb/></s>
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6250 <s xml:id="echoid-s3246" xml:space="preserve">Wenn dieſer die zerbrochenen Stellen einer Flaſche mit <lb/>Kütt oder Firniß überzog, ſo fand er beſtändig, daß ſie <lb/>allezeit an der Stelle wieder zerbrach, wo der Kütt auf-<lb/>hörte; </s>
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6251 <s xml:id="echoid-s3247" xml:space="preserve">hier ward das Glas von neuem durchlöchert, ſo <lb/>daß der Bruch keine Verbindung mit dem vorigen hatte.</s>
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6252 <s xml:id="echoid-s3248" xml:space="preserve">
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6253 <pb o="218" file="0238" n="238" rhead="Sechszehntes Capitel."/>
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6254 Die Flaſche zerbrach allezeit bey der erſten Ladung, gemei-<lb/>niglich noch ehe ſie ihre halbe Ladung erhalten hatte. </s>
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6255 <s xml:id="echoid-s3249" xml:space="preserve">D. <lb/></s>
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6256 <s xml:id="echoid-s3250" xml:space="preserve">Prieſtley, welchem dieſes Phänomen auſfiel, machte den <lb/>Verſuch mit einer Flaſche, welche nicht zerbrochen war, <lb/>und von deren Stärke er ſich im voraus durch verſchiedene <lb/>Entladungen verſichert hatte: </s>
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6257 <s xml:id="echoid-s3251" xml:space="preserve">er nahm etwas von ihrer <lb/>äußern Belegung hinweg, legte einen Fleck Kütt, etwa <lb/>von einem Zolle im Durchmeſſer, darauf, zog die Bele-<lb/>gung wieder darüber, und lud die Flaſche; </s>
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6258 <s xml:id="echoid-s3252" xml:space="preserve">aber, ehe ſie <lb/>noch ihre halbe Ladung erhalten hatte, zerbrach ſie durch <lb/>eine freywillige Entladung, zwat nicht am Ende, ſondern <lb/>in der Mitte des Küttflecks, wo das Glas am dünnſten <lb/>war. </s>
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6259 <s xml:id="echoid-s3253" xml:space="preserve">Er bedeckte eine andere Flaſche ganz mit Kütt, <lb/>und dieſe zerbrach nahe am Boden, wo das Glas gemei-<lb/>niglich am dickſten iſt. </s>
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6260 <s xml:id="echoid-s3254" xml:space="preserve">Eine von innen und außen ganz <lb/>mit Kütt überzogene und dann mit Stanniol belegte Fla-<lb/>ſche zerbrach bey dem erſten Verſuche, ſie zu laden.</s>
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6261 <s xml:id="echoid-s3255" xml:space="preserve"/>
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6262 </p>
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6263 </div>
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6264 <div xml:id="echoid-div271" type="section" level="1" n="261">
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6265 <head xml:id="echoid-head286" xml:space="preserve">218. Verſuch.</head>
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6266 <p>
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6267 <s xml:id="echoid-s3256" xml:space="preserve">Das Zaubergemälde (magiſche Gemälde) be-<lb/>ſteht aus einer belegten Glastafel, dergleichen zu dem leid-<lb/>ner Verſuche gebraucht werden; </s>
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6268 <s xml:id="echoid-s3257" xml:space="preserve">über die Belegung der <lb/>einen Seite wird ein Gemälde, und über die andere Seite <lb/>ein weißes Papier geklebt, ſo daß es das ganze Glas be-<lb/>deckt; </s>
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6269 <s xml:id="echoid-s3258" xml:space="preserve">dieſes wird in einen Rahmen gefaſſet, mit aus. <lb/></s>
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6270 <s xml:id="echoid-s3259" xml:space="preserve">wärts gekehrtem Gemälde, und eine Verbindung zwiſchen <lb/>dem Stanniol der hintern Seite und der untern Leiſte des <lb/>Rahmens gemacht, auch wird dieſe Leiſte mit Stanniol <lb/>überzogen.</s>
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6271 <s xml:id="echoid-s3260" xml:space="preserve"/>
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6272 </p>
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6273 <p>
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6274 <s xml:id="echoid-s3261" xml:space="preserve">Man lege dieſes Gemälde mit aufwärts gekehrtem <lb/>Bilde auf den Tifch, und ein Stück Geld darauf, laſſe <lb/>von dem Conductor einer Maſchine eine Kette darauf her-<lb/>abfallen, und drehe den Cylinder, ſo wird die Glasplatte <lb/>bald geladen ſeyn. </s>
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6275 <s xml:id="echoid-s3262" xml:space="preserve">Nun hebe man das Gemälde bey der <lb/>obern Leiſte auf, und laſſe eine andere Perſon die untere <lb/>Leiſte berühren, und zugleich verſuchen, das Geldſtück
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6276 <pb o="219" file="0239" n="239" rhead="Vermiſchte Verſuche."/>
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6277 wegzunehmen, ſo wird dieſelbe einen Schlag erhalten, <lb/>und gemeiniglich ihre Abſicht verfehlen.</s>
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6278 <s xml:id="echoid-s3263" xml:space="preserve"/>
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6279 </p>
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6280 </div>
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6281 <div xml:id="echoid-div272" type="section" level="1" n="262">
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6282 <head xml:id="echoid-head287" xml:space="preserve">219. Verſuch.</head>
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6283 <p>
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6284 <s xml:id="echoid-s3264" xml:space="preserve">Man ſchütte etwas Meſſingſpäne in eine belegte <lb/>Flaſche, lade dieſelbe, kehre ſie um, und laſſe etwas von <lb/>den Spänen heraus fallen, ſo werden ſich dieſelben über <lb/>jede untergelegte glatte Fläche ganz gleichförmig verbrei-<lb/>ten, und gerade ſo, wie Regen oder Schnee niederfallen. <lb/></s>
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6285 <s xml:id="echoid-s3265" xml:space="preserve">Sollte man nicht die Frage aufwerfen können, ob nicht <lb/>das Waſſer, wenn es aus den höchſten Gegenden der mit <lb/>Wolken beladenen Atmoſphäre herabfällt, in weit größern <lb/>Tropfen, oder wohl gar in ganzen Strömen auf die Erde <lb/>kommen würde, wenn nicht das Zuſammenfließen der <lb/>Tropfen durch ihre elektriſchen Atmoſphären verhindert <lb/>würde?</s>
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6286 <s xml:id="echoid-s3266" xml:space="preserve"/>
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6287 </p>
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6288 </div>
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6289 <div xml:id="echoid-div273" type="section" level="1" n="263">
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6290 <head xml:id="echoid-head288" xml:space="preserve">220. Verſuch.</head>
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6291 <p>
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6292 <s xml:id="echoid-s3267" xml:space="preserve">Man ſtelle ein rauchendes Wachslicht auf den erſten <lb/>Leiter, und drehe die Maſchine, ſo wird ſich der Rauch in <lb/>ein engeres Volumen zuſammen ziehen, und ſeine aufſtei-<lb/>gende Bewegung wird beſchleuniget werden. </s>
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6293 <s xml:id="echoid-s3268" xml:space="preserve">Man nehme <lb/>die Elektricität aus dem Conductor durch einen Funken <lb/>hinweg, hänge ein paar Korkkugeln über denſelben, die etwa <lb/>5 Schuh weit von ihm abſtehen, und drehe die Maſchine <lb/>von neuem, ſo werden die Kugeln in wenigen Sekunden <lb/>auf einen halben Zoll weit aus einander gehen; </s>
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6294 <s xml:id="echoid-s3269" xml:space="preserve">nimmt <lb/>man aber das Wachslicht hinweg, ſo gehen die Kugeln <lb/>nicht aus einander.</s>
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6295 <s xml:id="echoid-s3270" xml:space="preserve"/>
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6296 </p>
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6297 <p>
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6298 <s xml:id="echoid-s3271" xml:space="preserve">Dieſer Verſuch beweiſet alſo deutlich, daß der Rauch <lb/>ein Leiter von Elektricität ſey.</s>
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6299 <s xml:id="echoid-s3272" xml:space="preserve"/>
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6300 </p>
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6301 </div>
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6302 <div xml:id="echoid-div274" type="section" level="1" n="264">
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6303 <head xml:id="echoid-head289" xml:space="preserve">221. Verſuch.</head>
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6304 <p>
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6305 <s xml:id="echoid-s3273" xml:space="preserve">Man nehme ein rundes überfirnißtes Bret, lege eine <lb/>Kette in Form einer Spirallinie darauf, laſſe das innere <lb/>Ende der Kette durch das Bret hindurchgehen, und ver-<lb/>binde es mit der Belegung einer großen Flaſche; </s>
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6306 <s xml:id="echoid-s3274" xml:space="preserve">das äuſ-
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6307 <pb o="220" file="0240" n="240" rhead="Sechszehntes Capitel."/>
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6308 ſere Ende befeſtige man an einen Auslader und entlade die <lb/>Flaſche; </s>
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6309 <s xml:id="echoid-s3275" xml:space="preserve">ſo wird man an jedem Gelenke der Kette einen <lb/>ſchönen Funken ſehen. </s>
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6310 <s xml:id="echoid-s3276" xml:space="preserve">Man kann durch eine ſolche Kette <lb/>eine unzählbare Menge verſchiedener Illuminationen her-<lb/>vorbringen.</s>
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6311 <s xml:id="echoid-s3277" xml:space="preserve"/>
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6312 </p>
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6313 </div>
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6314 <div xml:id="echoid-div275" type="section" level="1" n="265">
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6315 <head xml:id="echoid-head290" xml:space="preserve">222. Verſuch.</head>
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6316 <p>
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6317 <s xml:id="echoid-s3278" xml:space="preserve">Man klebe Stücken Stanniol, in gleichen Entfernun-<lb/>gen von einander, auf einen gebognen Glasſtab, deſſen <lb/>beyde Enden mit meſſingenen Kugeln verſehen ſind, und <lb/>befeſtige an die Mitte dieſes Stabs einen gläſernen Hand-<lb/>griff. </s>
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6318 <s xml:id="echoid-s3279" xml:space="preserve">Dieſes Inſtrument, als Auslader gebraucht, zeigt <lb/>zu gleicher Zeit das elektriſche Licht an jeder Lücke zwiſchen <lb/>den Stanniolſtücken.</s>
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6319 <s xml:id="echoid-s3280" xml:space="preserve"/>
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6320 </p>
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6321 <p>
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6322 <s xml:id="echoid-s3281" xml:space="preserve">Ich habe ſeit einigen Iahren verſchiedene ſolche <lb/>leuchtende Auslader gemacht, um dadurch zu beweiſen, <lb/>daß die elektriſche Materie bey jeder Entladung ſowohl <lb/>aus der negativen als aus der poſitiven Belegung ausgehe, <lb/>der Idee gemäß, welche Herrn Atwood’s Verſuche <lb/>angeben (man ſ. </s>
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6323 <s xml:id="echoid-s3282" xml:space="preserve">den 118. </s>
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6324 <s xml:id="echoid-s3283" xml:space="preserve">— 120. </s>
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6325 <s xml:id="echoid-s3284" xml:space="preserve">Verſuch). </s>
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6326 <s xml:id="echoid-s3285" xml:space="preserve">Ich fand <lb/>aber bald, daß der Umfang eines Ausladers zu dieſer Ab-<lb/>ſicht viel zu klein und zu unbeträchtlich ſey.</s>
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6327 <s xml:id="echoid-s3286" xml:space="preserve"/>
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6328 </p>
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6329 </div>
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6330 <div xml:id="echoid-div276" type="section" level="1" n="266">
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6331 <head xml:id="echoid-head291" xml:space="preserve">223. Verſuch.</head>
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6332 <p>
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6333 <s xml:id="echoid-s3287" xml:space="preserve">Fig. </s>
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6334 <s xml:id="echoid-s3288" xml:space="preserve">98 zeigt einige Spiralröhren, welche in der <lb/>Runde auf einem Brete ſtehen. </s>
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6335 <s xml:id="echoid-s3289" xml:space="preserve">In der Mitte des Brets <lb/>ſteht eine Glasſäule, worauf eine meſſingene Haube geküt-<lb/>tet iſt, in welcher eine kleine ſtählerne Spitze ſteckt; </s>
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6336 <s xml:id="echoid-s3290" xml:space="preserve">auf <lb/>dieſer Spitze balancirt ein meſſingener Drath, der an jedem <lb/>Ende mit einer Kugel verſehen iſt. </s>
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6337 <s xml:id="echoid-s3291" xml:space="preserve">Man ſtelle die Mitte <lb/>dieſes Draths unter eine vom Conductor der Maſchine <lb/>hervorgehende Kugel, ſo daß der Drath beſtändige Fun-<lb/>ken aus dem Conductor erhält; </s>
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6338 <s xml:id="echoid-s3292" xml:space="preserve">dann gebe man dem Dra-<lb/>the eine umdrehende Bewegung, ſo werden die Kugeln <lb/>bey der Umdrehung jedem Knopfe der Spiralröhren einen <lb/>Funken geben, der ſich durch den Stanniol der Röhren
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6339 <pb o="221" file="0241" n="241" rhead="Vermiſchte Verſuche."/>
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6340 dem Vrete mittheilet, und wegen des glänzenden Lichts <lb/>und der ſchnellen Bewegung ein ſehr angenehmes Schau-<lb/>ſpiel darſtellt.</s>
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6341 <s xml:id="echoid-s3293" xml:space="preserve"/>
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6342 </p>
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6343 <p>
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6344 <s xml:id="echoid-s3294" xml:space="preserve">Alle dieſe Verſuche mit dem unterbrochenen Funken <lb/>kann man ſehr ſchön verändern, und dem Funken nach <lb/>Gefallen verſchiedene Farben geben.</s>
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6345 <s xml:id="echoid-s3295" xml:space="preserve"/>
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6346 </p>
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6347 </div>
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6348 <div xml:id="echoid-div277" type="section" level="1" n="267">
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6349 <head xml:id="echoid-head292" xml:space="preserve">224. Verſuch.</head>
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6350 <p>
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6351 <s xml:id="echoid-s3296" xml:space="preserve">Man hänge eine leichte Korkkugel, welche mit Stan-<lb/>niol oder Goldblättchen überzogen iſt, an einem ſehr lan-<lb/>gen ſeidnen Faden auf, ſo daß ſie gerade den Knopf einer <lb/>auf dem Tiſche ſtehenden geladenen Flaſche berühret; </s>
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6352 <s xml:id="echoid-s3297" xml:space="preserve">ſo <lb/>wird ſie zuerſt angezogen, und dann auf eine gewiſſe <lb/>Diſtanz zurückgeſtoßen, wo ſie nach einigen Schwingun-<lb/>gen, endlich in Ruhe bleibt. </s>
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6353 <s xml:id="echoid-s3298" xml:space="preserve">Wird nun in einiger Ent-<lb/>fernung ein angezündetes Licht dahinter geſtellt, ſo daß die <lb/>Flamme ziemlich eben ſo hoch, als der Knopf der Flaſche <lb/>ſteht, ſo wird ſich die Korkkugel ſogleich bewegen, und <lb/>nach einigen unregelmäßigen Bewegungen eine krumme <lb/>Linie um den Knopf der Flaſche beſchreiben, welche Be-<lb/>wegung ſie auch eine Zeitlang fortſetzen wird.</s>
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6354 <s xml:id="echoid-s3299" xml:space="preserve"/>
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6355 </p>
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6356 <p>
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6357 <s xml:id="echoid-s3300" xml:space="preserve">Fig. </s>
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6358 <s xml:id="echoid-s3301" xml:space="preserve">96 und 97 zelgen ein Elektrometer, welches <lb/>dem von Herrn Brooke erfundenen ziemlich ähnlich iſt. <lb/></s>
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6359 <s xml:id="echoid-s3302" xml:space="preserve">Beyde Inſtrumente werden bisweilen zu einem einzigen <lb/>verbunden, bisweilen auch jedes beſonders gebraucht, wie <lb/>in den Figuren. </s>
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6360 <s xml:id="echoid-s3303" xml:space="preserve">Die Arme F H, fk, Fig. </s>
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6361 <s xml:id="echoid-s3304" xml:space="preserve">97 müſſen <lb/>beym Gebrauch ſo weit, als möglich, von der Atmoſphäre <lb/>der Flaſche, der Batterie, des erſten Leiters u. </s>
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6362 <s xml:id="echoid-s3305" xml:space="preserve">ſ. </s>
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6363 <s xml:id="echoid-s3306" xml:space="preserve">f. </s>
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6364 <s xml:id="echoid-s3307" xml:space="preserve">ent-<lb/>fernt werden. </s>
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6365 <s xml:id="echoid-s3308" xml:space="preserve">Der Arm F H und der Ball K ſind von <lb/>Kupfer, und ſo leicht, als möglich. </s>
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6366 <s xml:id="echoid-s3309" xml:space="preserve">Die Theilungsgrade <lb/>am Arme F H betragen jeder einen Gran. </s>
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6367 <s xml:id="echoid-s3310" xml:space="preserve">Sie werden <lb/>zuerſt beſtimmt, indem man Grangewichte in eine meſſin-<lb/>gene Kugel legt, welche ſich in der Kugel I befindet (dieſe <lb/>Kugel hält ganz genau das Gleichgewicht mit dem Arme <lb/>F H und dem Balle K, wenn der Schieber r auf dem <lb/>erſten Theilungspunkte ſteht) und dann den Schieber r
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6368 <pb o="222" file="0242" n="242" rhead="Sechzehntes Capitel."/>
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6369 ſolange fortſchiebt, bis er zugleich mit dem Balle K, der <lb/>Kugel I und dem darinn befindlichen Gewichte das Gleich-<lb/>gewicht hält.</s>
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6370 <s xml:id="echoid-s3311" xml:space="preserve"/>
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6371 </p>
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6372 <p>
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6373 <s xml:id="echoid-s3312" xml:space="preserve">A, Fig. </s>
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6374 <s xml:id="echoid-s3313" xml:space="preserve">96 iſt eine in 90 gleiche Theile getheilte <lb/>Cirkelſcheibe. </s>
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6375 <s xml:id="echoid-s3314" xml:space="preserve">Der Zeiger dieſer Scheibe geht einmal her-<lb/>um, wenn ſich der Arm B C durch 90 Grad oder den <lb/>vierten Theil eines Cirkels bewegt hat. </s>
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6376 <s xml:id="echoid-s3315" xml:space="preserve">Der Zeiger erhält <lb/>ſeine Bewegung durch die zurückſtoſſende Kraft der zwi-<lb/>ſchen den Bällen D und B wirkenden Ladung <anchor type="note" xlink:href="" symbol="*)"/>.</s>
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6377 <s xml:id="echoid-s3316" xml:space="preserve"/>
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6378 </p>
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6379 <p>
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6380 <s xml:id="echoid-s3317" xml:space="preserve">Wenn der Arm B C zurückgeſtoßen wird, ſo zeigt <lb/>dies, daß die Ladung ſtärker werde; </s>
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6381 <s xml:id="echoid-s3318" xml:space="preserve">der Arm FH hinge-<lb/>gen zeigt, wie groß die zurückſtoßende Kraft zwiſchen <lb/>zween Bällen von dieſer Größe in Granen ſey, durch die <lb/>Zahl, auf welcher das Gewicht ſtehen bleibt, wenn der <lb/>Arm durch die zurückſtoßende Kraft der Ladung aufgeho-<lb/>ben wird. </s>
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6382 <s xml:id="echoid-s3319" xml:space="preserve">Zugleich giebt der Arm B C die Anzahl der <lb/>Grade an, auf welche der Ball B zurückgeſtoßen wird; <lb/></s>
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6383 <s xml:id="echoid-s3320" xml:space="preserve">ſo daß man durch wiederholte Verſuche die Anzahl der <lb/>Grade, welche jeder gegebenen Anzahl von Granen zu-<lb/>kömmt, beſtimmen, und eine Tabelle darüber verfertigen <lb/>kann, mit deren Hülfe man dann das Elektrometer Fig. </s>
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6384 <s xml:id="echoid-s3321" xml:space="preserve">96 <lb/>ohne das Fig. </s>
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6385 <s xml:id="echoid-s3322" xml:space="preserve">97 vorgeſtellte gebrauchen kann.</s>
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6386 <s xml:id="echoid-s3323" xml:space="preserve"/>
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6387 </p>
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6388 <p>
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6389 <s xml:id="echoid-s3324" xml:space="preserve">Herr Brooke glaubt, kein mit Elektricität gelade-<lb/>nes Glas vertrage eine ſtärkere Ladung, als diejenige, de-<lb/>ren zurückſtoßende Kraft zwiſchen Bällen von der Größe, <lb/>wie er ſie gebrauchte, 60 Gran betrage; </s>
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6390 <s xml:id="echoid-s3325" xml:space="preserve">in wenigen Fäl-<lb/>len halte es 60 Gran Gewicht, und es ſey jederzeit ge-<lb/>fährlich, weiter, als auf 45 Gran zu gehen.</s>
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6391 <s xml:id="echoid-s3326" xml:space="preserve"/>
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6392 </p>
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6393 <p>
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6394 <s xml:id="echoid-s3327" xml:space="preserve">Wenn nun die Größe einer belegten Fläche und der <lb/>Durchmeſſer der Bälle bekannt iſt, ſo kann man daraus <lb/>beſtimmen, wieviel belegte Fläche und wieviel Grane Re-<lb/>pulſion nöthig ſind, um einen Drath von gegebner Größe <lb/>zu ſchmelzen, ein Thier zu tödten u. </s>
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6395 <s xml:id="echoid-s3328" xml:space="preserve">ſ. </s>
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6396 <s xml:id="echoid-s3329" xml:space="preserve">w.</s>
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6397 <s xml:id="echoid-s3330" xml:space="preserve"/>
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6398 </p>
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6399 <note symbol="*)" position="foot" xml:space="preserve"> Man ſehe Philoſ. Transact. Vel. LXXXII. p.384.</note>
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6400 <pb o="223" file="0243" n="243" rhead="Vermiſchte Verſuche."/>
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6401 <p>
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6402 <s xml:id="echoid-s3331" xml:space="preserve">Herr Brooke glaubt zwar noch nicht hinlänglich <lb/>bekannt mit allen Vorzügen dieſes Elektrometers zu ſeyn; <lb/></s>
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6403 <s xml:id="echoid-s3332" xml:space="preserve">ſoviel aber, ſagt er, ſey doch klar, daß er eine allgemein <lb/>verſtändliche Sprache rede, welches bey keinem andern <lb/>Elektrometer möglich ſey; </s>
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6404 <s xml:id="echoid-s3333" xml:space="preserve">denn obgleich andere Elektro-<lb/>meter zeigten, ob eine Ladung ſtärker oder ſchwächer ſey, <lb/>wenn ihr Zeiger mehr oder weniger abgeſtoßen würde, oder <lb/>die Ladung auf größere oder geringere Diſtanzen explodirte, <lb/>ſo werde doch die eigentliche Größe der Ladung dadurch <lb/>nicht beſtimmt: </s>
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6405 <s xml:id="echoid-s3334" xml:space="preserve">dieſes Elektrometer hingegen zeige die <lb/>Stärke der zurückſtoßenden Kraft in Granen; </s>
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6406 <s xml:id="echoid-s3335" xml:space="preserve">und die Ge-<lb/>nauigkeit des Inſtruments könne leicht probiret werden, <lb/>wenn man Gewichte auf die innere Kugel lege, und ſehe, <lb/>ob ſie mit den Graden der Theilung in F H, auf welche <lb/>der Schieber geſtellt ſey, übereinſtimmen.</s>
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6407 <s xml:id="echoid-s3336" xml:space="preserve"/>
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6408 </p>
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6409 </div>
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6410 <div xml:id="echoid-div278" type="section" level="1" n="268">
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6411 <head xml:id="echoid-head293" xml:space="preserve">Beobachtungen und Verſuche des D. Prieſtley <lb/>über die Wirkungen der Elektricität auf ver-<lb/>ſchiedene elaſtiſche Flüſſigkeiten.</head>
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6412 <head xml:id="echoid-head294" xml:space="preserve">225. Verſuch.</head>
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6413 <head xml:id="echoid-head295" xml:space="preserve">Blaue mit vegetabiliſchen Säften gefärbte Liquoren <lb/>roth zu färben.</head>
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6414 <p>
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6415 <s xml:id="echoid-s3337" xml:space="preserve">Der hiezu dienende Apparatus iſt Fig. </s>
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6416 <s xml:id="echoid-s3338" xml:space="preserve">94 vorgeſtellt. <lb/></s>
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6417 <s xml:id="echoid-s3339" xml:space="preserve">A B iſt eine 4 — 5 Zoll lange und {1/10} — {2/10} Zoll Weite im <lb/>Lichten haltende Glasröhre; </s>
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6418 <s xml:id="echoid-s3340" xml:space="preserve">in das eine Ende derſelben iſt <lb/>ein Drath eingeküttet, an welchem ſich eine meſſingene <lb/>Kugel befindet; </s>
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6419 <s xml:id="echoid-s3341" xml:space="preserve">der untere Theil der Röhre von a an wird <lb/>mit Waſſer gefüllt, das mit Lakmus oder Veilchenſaft <lb/>blau gefärbt iſt. </s>
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6420 <s xml:id="echoid-s3342" xml:space="preserve">Man kann dies leicht bewerkſtelligen, <lb/>wenn man die Röhre in ein Gefäß mit gefärbtem Waſſer <lb/>ſtellt, und alles zuſammen unter die Glocke der Luftpum-<lb/>pe ſetzt; </s>
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6421 <s xml:id="echoid-s3343" xml:space="preserve">denn wenn man nun die Luft aus der Glocke zie-<lb/>het, und ſie dann wieder hinein läßt, ſo wird der gefärbte <lb/>Liquor in der Röhre in die Höhe ſteigen, und zwar deſto
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6422 <pb o="224" file="0244" n="244" rhead="Sechzehntes Capitel."/>
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6423 höher, je reiner das Vacuum geweſen iſt. </s>
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6424 <s xml:id="echoid-s3344" xml:space="preserve">Nunmehe <lb/>nehme man Röhre und Gefäß aus der Glocke heraus, und <lb/>laſſe aus dem erſten Leiter ſtarke Funken in die meſſingene <lb/>Kugel ſchlagen.</s>
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6425 <s xml:id="echoid-s3345" xml:space="preserve"/>
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6426 </p>
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6427 <p>
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6428 <s xml:id="echoid-s3346" xml:space="preserve">Wenn D. </s>
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6429 <s xml:id="echoid-s3347" xml:space="preserve">Prieſtley dieſen Verſuch anſtellte, ſo <lb/>fand er, daß ohngefehr eine Minute nach gezogenem Fun-<lb/>ken zwiſchen dem Drathe b und dem Liquor bey a, der <lb/>obere Theil des Liquors roth zu werden anfieng; </s>
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6430 <s xml:id="echoid-s3348" xml:space="preserve">in zwo <lb/>Minuten ward er völlig roth, und der rothgefärbre Theil <lb/>vermiſchte ſich nicht leicht mit dem übrigen Liquor. </s>
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6431 <s xml:id="echoid-s3349" xml:space="preserve">Ward <lb/>die Röhre beym Ausziehen des Funkens ſchief geſtellt, ſo <lb/>erſtreckte ſich die Röthe an der untern Seite doppelt ſo <lb/>weit, als an der obern. </s>
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6432 <s xml:id="echoid-s3350" xml:space="preserve">Je röther der Liquor ward, deſto <lb/>näher kam er dem Drathe, daß alſo die Luft, durch wel-<lb/>che der Funken gieng, vermindert ward; </s>
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6433 <s xml:id="echoid-s3351" xml:space="preserve">dies erſtreckte <lb/>ſich etwa bis auf ein Fünftel des ganzen Raums, worauf <lb/>ein fortgeſetztes Elektriſiren weiter keine merkliche Wirkung <lb/>mehr hervorbrachte.</s>
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6434 <s xml:id="echoid-s3352" xml:space="preserve"/>
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6435 </p>
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6436 <p>
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6437 <s xml:id="echoid-s3353" xml:space="preserve">Um nun zu beſtimmen, ob die Urſache dieſer Ver-<lb/>änderung der Farbe in der Luft, oder in der elektriſchen <lb/>Materie liege, dehnte D. </s>
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6438 <s xml:id="echoid-s3354" xml:space="preserve">Prieſtley mit Hülfe der Luft-<lb/>pumpe die Luft in der Röhre ſo lang aus, bis aller Liquor <lb/>heraus war, und ließ friſchen blauen Liquor anſtatt des <lb/>vorigen hinein, auf welchen aber die Elektricität keine <lb/>merkliche Wirkung that. </s>
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6439 <s xml:id="echoid-s3355" xml:space="preserve">Man ſahe alſo deutlich, daß <lb/>die elektriſche Materie die Luft decomponiret, und dieſe <lb/>etwas Säure abgeſetzt habe. </s>
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6440 <s xml:id="echoid-s3356" xml:space="preserve">Das Reſultat war immer <lb/>einerley, wenn er gleich Dräthe von verſchiedenen Metal-<lb/>len nahm. </s>
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6441 <s xml:id="echoid-s3357" xml:space="preserve">Es blieb auch noch immer eben daſſelbe, wenn <lb/>er in einer umgebognen Röhre den Funken von dem Li-<lb/>quor des einen Schenkels in den Liquor des andern über-<lb/>gehen ließ. </s>
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6442 <s xml:id="echoid-s3358" xml:space="preserve">Die auf dieſe Art verminderte Luft war im <lb/>höchſten Grade ſchädlich.</s>
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6443 <s xml:id="echoid-s3359" xml:space="preserve"/>
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6444 </p>
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6445 <p>
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6446 <s xml:id="echoid-s3360" xml:space="preserve">Gieng der elektriſche Funken durch verſchiedne Luft-<lb/>gattungen, ſo zeigte er verſchiedne Farben. </s>
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6447 <s xml:id="echoid-s3361" xml:space="preserve">In firer Luft <lb/>war der Funken ſehr weiß, in brennbarer und laugenarti-
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6448 <pb o="225" file="0245" n="245" rhead="Vermiſchte Verſuche."/>
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6449 ger Luft hatte er eine purpurrothe oder rothe Farbe. <lb/></s>
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6450 <s xml:id="echoid-s3362" xml:space="preserve">Man kann hieraus ſchließen, daß die leitende Kraft dieſer <lb/>Luftgattungen verſchieden, und daß die fire Luft ein voll-<lb/>kommnerer Nicht-leiter, als die brennbare ſey.</s>
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6451 <s xml:id="echoid-s3363" xml:space="preserve"/>
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6452 </p>
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6453 <p>
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6454 <s xml:id="echoid-s3364" xml:space="preserve">In einer von Herrn Lane aus dem kauſtiſchen Al-<lb/>kali gezognen Luftart, ingleichen in Luft aus Salzgeiſt, <lb/>war der Funken gar nicht ſichtbar, daß alſo dieſe Luftgat-<lb/>tungen noch vollkommnere Leiter der Elektricität zu ſeyn <lb/>ſcheinen, als das Waſſer oder andere flüſſige Subſtanzen.</s>
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6455 <s xml:id="echoid-s3365" xml:space="preserve"/>
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6456 </p>
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6457 <p>
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6458 <s xml:id="echoid-s3366" xml:space="preserve">Aus allen Arten von Oel entbindet der elektriſche <lb/>Funken brennbare Luft. </s>
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6459 <s xml:id="echoid-s3367" xml:space="preserve">D. </s>
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6460 <s xml:id="echoid-s3368" xml:space="preserve">Prieſtley machte den Ver-<lb/>ſuch mit Aether, mit Olivenöl, Terpentinöl, weſentlichem <lb/>Oel der Münze 2c. </s>
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6461 <s xml:id="echoid-s3369" xml:space="preserve">und zog elektriſche Funken aus denſel-<lb/>ben ohne allen Zugang der Luft; </s>
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6462 <s xml:id="echoid-s3370" xml:space="preserve">es ward aber aus allen <lb/>brennbare Luft entbunden.</s>
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diff changeset
6463 <s xml:id="echoid-s3371" xml:space="preserve"/>
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6464 </p>
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diff changeset
6465 <p>
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6466 <s xml:id="echoid-s3372" xml:space="preserve">D. </s>
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6467 <s xml:id="echoid-s3373" xml:space="preserve">Prieſtley fand, wenn er eine ſchwache elektri-<lb/>ſche Erploſion eine Stunde lang in einen Zoll fire Luft ge-<lb/>hen ließ, welche in eine Glasröhre von {1/10} Zoll Durch-<lb/>meſſer eingeſchloſſen war, daß alsdann nur ein Viertel <lb/>dieſer Luft vom Waſſer eingeſogen ward. </s>
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diff changeset
6468 <s xml:id="echoid-s3374" xml:space="preserve">Wahrſcheinlich <lb/>würde das Ganze ſeyn eingeſogen worden, wenn die elektri-<lb/>ſche Operation lange genug wäre fortgeſetzt worden.</s>
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diff changeset
6469 <s xml:id="echoid-s3375" xml:space="preserve"/>
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diff changeset
6470 </p>
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diff changeset
6471 <p>
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6472 <s xml:id="echoid-s3376" xml:space="preserve">In laugenartiger Luft erſcheint der elektriſche Funken <lb/>roth: </s>
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6473 <s xml:id="echoid-s3377" xml:space="preserve">elektriſche Erploſionen, welche durch dieſe Luft ge-<lb/>hen, vergrößern das Volumen derſelben, ſo daß eine <lb/>Quantität dieſer Luft, wenn man etwa 200 Erploſionen <lb/>durch dieſelbe gehen läßt, bisweilen um den vierten Theil <lb/>ihres anfänglichen Volumens vergrößert wird. </s>
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6474 <s xml:id="echoid-s3378" xml:space="preserve">Läßt man <lb/>alsdann Waſſer zu dieſer Luft, ſo abſorbirt daſſelbe die <lb/>anfängliche Quantität, und läßt nur ſoviel elaſtiſches Flui-<lb/>dum übrig, als die Elektricität erzeugt hat, und dieſer <lb/>Ueberreſt iſt ſtark brennbare Luft.</s>
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6475 <s xml:id="echoid-s3379" xml:space="preserve"/>
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diff changeset
6476 </p>
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diff changeset
6477 <p>
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6478 <s xml:id="echoid-s3380" xml:space="preserve">Wenn D. </s>
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6479 <s xml:id="echoid-s3381" xml:space="preserve">Prieſtley den elektriſchen Funken in vi-<lb/>triolſaurer Luft auszog, ſo fand er, daß die innere Seite <lb/>der Röhre, in welche dieſelbe eingeſchloſſen war, mit einer <lb/>ſchwarzgrauen Subſtanz überzogen ward. </s>
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6480 <s xml:id="echoid-s3382" xml:space="preserve">Er ſcheint da-
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6481 <pb o="226" file="0246" n="246" rhead="Sechszehntes Capitel."/>
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6482 für zu halten, daß ſich die ganze vitriolſaure Luft in dieſe <lb/>ſchwarze Materie verwandeln laſſe, und zwar nicht durch <lb/>eine Verbindung mit der elektriſchen Materie, ſondern <lb/>bloß durch die von der Erploſion veranlaſſete Erſchütte-<lb/>rung; </s>
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6483 <s xml:id="echoid-s3383" xml:space="preserve">und daß man, wenn es der Kalk des Metalls ſey, <lb/>welches das Phlogiſton hergegeben habe, nicht unterſchei-<lb/>den könne, aus welchem Metalle, und überhaupt aus wel-<lb/>cher Subſtanz die Luſt ſey ausgezogen worden.</s>
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6484 <s xml:id="echoid-s3384" xml:space="preserve"/>
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6485 </p>
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diff changeset
6486 <p>
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6487 <s xml:id="echoid-s3385" xml:space="preserve">D. </s>
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6488 <s xml:id="echoid-s3386" xml:space="preserve">Prieſtley ließ 150 Erploſionen aus einer ge-<lb/>meinen Flaſche in ein Viertelunzenmaaß vitriolſaure Luft <lb/>aus Kupfer gehen, wodurch das Volumen derſelben ohn-<lb/>gefähr um ein Drittel vermindert wurde, der Ueberreſt <lb/>aber dem Anſcheine nach nicht verändert war, indem er <lb/>ganz vom Waſſer abſorbiret wurde. </s>
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6489 <s xml:id="echoid-s3387" xml:space="preserve">Dieſe Luft ward fer-<lb/>ner ſehr ſorgfältig dreymal aus einem Gefäße in ein an-<lb/>deres gelaſſen; </s>
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6490 <s xml:id="echoid-s3388" xml:space="preserve">und das letzte Gefäß, in welchem die Er-<lb/>ploſionen gemacht wurden, ward dadurch eben ſo ſchwarz, <lb/>als das erſte, ſo daß es ſcheint, als ob ſich dieſe Luft ganz <lb/>in dieſe ſchwarze Subſtanz verwandeln laſſe.</s>
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6491 <s xml:id="echoid-s3389" xml:space="preserve"/>
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6492 </p>
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6493 <p>
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6494 <s xml:id="echoid-s3390" xml:space="preserve">Weil er vermuthete, es könne dieſe Verminderung <lb/>der vitriolſauren Luft davon herrühren, daß dieſelbe von <lb/>dem Kütt, mit welchem die beym Verſuche gebrauchten <lb/>Glasröhren verſchloſſen waren, abſorbirt würde, ſo wie-<lb/>derholte er den Verſuch mit Luft aus Queckſilber, die in <lb/>einer gläſernen gebognen Röhre mit Queckſilber eingeſchloſ-<lb/>ſen war, fand aber eben daſſelbe Reſultat.</s>
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6495 <s xml:id="echoid-s3391" xml:space="preserve"/>
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6496 </p>
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6497 <p>
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6498 <s xml:id="echoid-s3392" xml:space="preserve">Daß dieſe Materie bloß aus der vitriolſauren Luft, <lb/>und nicht aus einer Verbindung der elektriſchen Materie <lb/>mit derſelben entſtehe, wird aus folgendem Verſuche er-<lb/>hellen.</s>
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6499 <s xml:id="echoid-s3393" xml:space="preserve"/>
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6500 </p>
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6501 <p>
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6502 <s xml:id="echoid-s3394" xml:space="preserve">D. </s>
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6503 <s xml:id="echoid-s3395" xml:space="preserve">Prieſtley zog aus einem Conductor von mäſſi-<lb/>g@r Größe fünf Minuten lang ununterbrochen den einfachen <lb/>elektriſchen Funken in eine Quantität vitriolſaurer Luft, <lb/>ohne daß an der innern Seite des Glaſes die geringſte <lb/>Veränderung erfolgte; </s>
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6504 <s xml:id="echoid-s3396" xml:space="preserve">wenn er aber gleich darauf nur zwo <lb/>Erploſionen einer gemeinen Flaſche durchgehen ließ, deren
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6505 <pb o="227" file="0247" n="247" rhead="Vermiſchte Verſuche."/>
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6506 jede in weniger als einer Viertelminute von derſelben Ma-<lb/>ſchine in ebendemſelben Zuſtande hervorgebracht wurde, ſo <lb/>wurde die ganze innere Seite des Glaſes völlig mit der <lb/>ſchwarzen Materie überzogen. </s>
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6507 <s xml:id="echoid-s3397" xml:space="preserve">Hätte ſich nun die elektriſche <lb/>Materie mit der Luft verbunden, und wäre dieſe ſchwarze <lb/>Materie das Reſultat dieſer Verbindung geweſen, ſo <lb/>könnte der ganze Unterſchied zwiſchen der Wirkung des <lb/>einfachen Funkens und der Erploſion, aufs höchſte nur in <lb/>dem Grade oder in der ſchnellern Entſtehung dieſer Mate-<lb/>rie beſtanden haben.</s>
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6508 <s xml:id="echoid-s3398" xml:space="preserve"/>
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6509 </p>
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6510 <p>
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6511 <s xml:id="echoid-s3399" xml:space="preserve">Wenn eine große ohngefähr 1 {1/2} Zoll weite Flaſche <lb/>mit dieſer Luft gefüllt ward, ſo that die Erploſion einer <lb/>ſehr großen Flaſche, welche mehr als 2 Quadratfuß belegte <lb/>Fläche enthielt, gar keine Wirkung darauf; </s>
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6512 <s xml:id="echoid-s3400" xml:space="preserve">woraus er-<lb/>hellet, daß in dieſen Fällen die Kraft des Schlags nicht <lb/>im Stande war, dieſer größern Menge von Luft eine ſo <lb/>ſtarke Erſchütterung zu geben, als zu Decompoſition eines <lb/>Theils derſelben nöthig geweſen wäre.</s>
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6513 <s xml:id="echoid-s3401" xml:space="preserve"/>
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6514 </p>
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6515 <p>
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6516 <s xml:id="echoid-s3402" xml:space="preserve">Er hatte zu Entbindung dieſer Luft gewöhnlich Kup-<lb/>fer gebraucht, hernach abat<unsure/> zog er ſie faſt aus allen Sub-<lb/>ſtanzen, aus welchen man ſie erhalten kann; </s>
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6517 <s xml:id="echoid-s3403" xml:space="preserve">die elektriſche <lb/>Erploſion that in allen die nehmliche Wirkung. </s>
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6518 <s xml:id="echoid-s3404" xml:space="preserve">Da ſich <lb/>aber doch bey einigen von dieſen Verſuchen beſondere Um-<lb/>ſtände zeigten, ſo erwähnt er derſelben mit wenigem, wie <lb/>folget.</s>
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6519 <s xml:id="echoid-s3405" xml:space="preserve"/>
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6520 </p>
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6521 <p>
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6522 <s xml:id="echoid-s3406" xml:space="preserve">Wenn er vitriolſaure Luft aus Bley zu erhalten ſuch-<lb/>te, und deswegen eine Quantität bleyernen Schrot in eine <lb/>Flaſche mit Vitriol ſchüttete, und nur den gewöhnlichen <lb/>Grad der Wärme gebrauchte, ſo entſtand eine ſehr be-<lb/>trächtliche Hiße; </s>
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6523 <s xml:id="echoid-s3407" xml:space="preserve">endlich aber konnte keine Luft mehr er-<lb/>halten werden, obgleich die Hitze bis zum Kochen der <lb/>Säure verſtärkt wurde. </s>
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6524 <s xml:id="echoid-s3408" xml:space="preserve">Er muthmaßte daher, daß in <lb/>dieſem Falle das Phlogiſton durch etwas, das an dem <lb/>Schrote angehangen habe, ſey erſetzt worden. </s>
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6525 <s xml:id="echoid-s3409" xml:space="preserve">Inzwi-<lb/>ſchen ließ er die elektriſche Erploſion durch die ſo erzeugte <lb/>Luft gehen; </s>
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6526 <s xml:id="echoid-s3410" xml:space="preserve">in der erſten Quantität, die er auf dieſe Art
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6527 <pb o="228" file="0248" n="248" rhead="Sechszehntes Capitel."/>
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6528 unterſuchte, erzeugte ſich eine weißliche Materie, welche <lb/>die innere Seite der Röhre faſt ganz bedeckte; </s>
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6529 <s xml:id="echoid-s3411" xml:space="preserve">zuletzt aber <lb/>ward nichts weiter, als ſchwarze Materie erzeugt, wie in <lb/>allen übrigen Verſuchen. </s>
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6530 <s xml:id="echoid-s3412" xml:space="preserve">Ließ man Waſſer zu dieſer, ſo <lb/>blieb ein beträchtlicher Ueberreſt zurück, welcher in ſehr ge-<lb/>ringem Grade kenntbar war.</s>
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6531 <s xml:id="echoid-s3413" xml:space="preserve"/>
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6532 </p>
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diff changeset
6533 <p>
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6534 <s xml:id="echoid-s3414" xml:space="preserve">Man kann auch ſehr leicht vitriolſaure Luft aus dem <lb/>Weingeiſt erhalten; </s>
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6535 <s xml:id="echoid-s3415" xml:space="preserve">die Miſchung wird ſchwarz, ehe man <lb/>einige Luft erhält. </s>
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6536 <s xml:id="echoid-s3416" xml:space="preserve">Auch in dieſer Luft ward durch die <lb/>elektriſche Erploſion die ſchwarze Materie erzeugt.</s>
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6537 <s xml:id="echoid-s3417" xml:space="preserve"/>
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6538 </p>
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6539 <p>
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6540 <s xml:id="echoid-s3418" xml:space="preserve">Die Verſuche mit dem Aether ſcheinen das meiſte <lb/>Licht über dieſe Materie zu verbreiten, da dieſe Luftgat-<lb/>tung aus dem Aether eben ſowohl, als aus jeder Phlogi-<lb/>ſton enthaltenden Subſtanz gezogen werden kann. </s>
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6541 <s xml:id="echoid-s3419" xml:space="preserve">In <lb/>der aus dem Aether gezognen Luft färbte der elektriſche <lb/>Schlag das Glas ſehr ſchwarz, mehr, als bey irgend ei-<lb/>nem andern Verſuche dieſer Art; </s>
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6542 <s xml:id="echoid-s3420" xml:space="preserve">und wenn das Waſſer <lb/>ſoviel, als möglich, von dieſer Luft eingeſchluckt hatte, ſo <lb/>blieb ein Ueberreſt, in welchem ein Licht mit einer lodern-<lb/>den blauen Farbe brannte. </s>
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6543 <s xml:id="echoid-s3421" xml:space="preserve">Das merkwürdigſte bey die-<lb/>ſem Verſuche aber war dieſes, daß nicht nur das Vitriolöl <lb/>während des Proceſſes ſehr ſchwarz ward, ſondern auch <lb/>eine ſchwarze dicke Subſtanz erzeugt wurde, welche auf <lb/>der Oberfläche der Säure ſchwamm.</s>
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6544 <s xml:id="echoid-s3422" xml:space="preserve"/>
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6545 </p>
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6546 <p>
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6547 <s xml:id="echoid-s3423" xml:space="preserve">Vielleicht könnte die chemiſche Zergliederung dieſer <lb/>Subſtanz mehr Licht über die Natur der ſchwarzen Mate-<lb/>rie verbreiten, welche durch elektriſche Erploſionen in vi-<lb/>triolſaurer Luft entſteht, da ſie beyde einander ſehr ähnlich <lb/>zu ſeyn ſcheinen.</s>
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6548 <s xml:id="echoid-s3424" xml:space="preserve"/>
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6549 </p>
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6550 <p>
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6551 <s xml:id="echoid-s3425" xml:space="preserve">In gemeiner mit Queckſilber in eine Glasröhre ein-<lb/>geſperrter Luft, bedeckt der elektriſche Funken oder Schlag <lb/>die innere Seite der Röhre mit einer ſchwarzen Materie, <lb/>welche, wenn ſie erhitzt wird, ſich als reines Queckſilber <lb/>zeiget. </s>
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6552 <s xml:id="echoid-s3426" xml:space="preserve">Dies mag daher wohl auch der Fall mit der <lb/>ſchwarzen Materie ſeyn, in welche nach Prieſtley’s Ver-<lb/>muthung durch eben dieſes Verfahren die vitriolſaure Luft
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6553 <pb o="229" file="0249" n="249" rhead="Vermiſchte Verſuche."/>
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6554 verwandlet werden ſoll, obgleich hiebey die Wirkung w@it <lb/>ſtärker war, als in der gemeinen Luft. </s>
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6555 <s xml:id="echoid-s3427" xml:space="preserve">Die Erploſion <lb/>bringt die Verminderung der gemeinen Luft oft in der <lb/>Hälfte derjenigen Zeit hervor, in welcher der einfache <lb/>Funken dieſes thut, wenn die Maſchine in gleich viel Zeit <lb/>gleich viel elektriſche Materie giebt: </s>
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6556 <s xml:id="echoid-s3428" xml:space="preserve">auch wird die Röhre <lb/>durch die Schläge viel eher ſchwarz, als durch die Funken. <lb/></s>
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6557 <s xml:id="echoid-s3429" xml:space="preserve">Iſt die Röhre viel weiter als {3/10} Zoll, ſo wird ſie biswei-<lb/>len ſehr ſchwarz, ohne daß jedoch eine merkliche Vermin-<lb/>derung der Quantität der Luft entſteht.</s>
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6558 <s xml:id="echoid-s3430" xml:space="preserve"/>
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6559 </p>
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diff changeset
6560 </div>
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6561 <div xml:id="echoid-div279" type="section" level="1" n="269">
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6562 <head xml:id="echoid-head296" xml:space="preserve">226. Verſuch.</head>
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6563 <p>
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6564 <s xml:id="echoid-s3431" xml:space="preserve">Dieſer beſondere Verſuch ward vom Herrn Mar-<lb/>ſham eigentlich in der Abſicht angeſtellt, um Dräthe <lb/>mit einer kleinen leidner Flaſche zu ſchmelzen. </s>
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6565 <s xml:id="echoid-s3432" xml:space="preserve">Die Wir-<lb/>kungen ſind merkwürdig, und ſcheinen ein ganz neues Feld <lb/>zu Unterſuchung der Kraft und Richtung der elektriſchen <lb/>Materie zu eröffnen. </s>
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6566 <s xml:id="echoid-s3433" xml:space="preserve">Er befeſtigte ein kleines Stück <lb/>Wachs auf die äußere Belegung der leidner Flaſche, und <lb/>ſteckte den Kopf einer kleinen Nadel ſo in daſſelbe, daß die <lb/>Nadel mit der Belegung rechte Winkel machte; </s>
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6567 <s xml:id="echoid-s3434" xml:space="preserve">der Spitze <lb/>dieſer Nadel gegen über und etwa einen halben Zoll weit <lb/>davon ward eine andere Nadel befeſtiget, indem man ſie <lb/>durch den Boden einer Schachtel ſteckte; </s>
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6568 <s xml:id="echoid-s3435" xml:space="preserve">dieſe ward durch <lb/>einen Drath mit dem Auslader verbunden. </s>
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6569 <s xml:id="echoid-s3436" xml:space="preserve">Ward nun <lb/>die Flaſche entladen, ſo ward die Nadel mit dem Wachſe <lb/>von der Belegung der Flaſche ab- und in die gegenüberſte-<lb/>hende Schachtel getrieben. </s>
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6570 <s xml:id="echoid-s3437" xml:space="preserve">Man vergrößerte den Abſtand <lb/>beyder Nadeln bis auf 2 {1/2} Zoll, welches die größte Schlag-<lb/>weite war. </s>
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6571 <s xml:id="echoid-s3438" xml:space="preserve">Der Kopf derjenigen Nadel, welche an der <lb/>Flaſche befeſtiget war, ward augenſcheinlich an zwo bis <lb/>drey Stellen geſchmolzen. </s>
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6572 <s xml:id="echoid-s3439" xml:space="preserve">War die Ladung ſtark, und <lb/>das Wachs nicht feſt an die Belegung geklebt, ſo wurden <lb/>Wachs und Nadel einige Zoll weit von der Flaſche wegge-<lb/>worfen. </s>
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6573 <s xml:id="echoid-s3440" xml:space="preserve">Steckte man eine Wachskugel an die Spitze jeder <lb/>Nadel, und ließ den Schlag durch dieſelben gehen, ſo <lb/>ward die Kugel von der mit der Flaſche verbundenen völli-
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6574 <pb o="230" file="0250" n="250" rhead="Sechszehntes Capitel."/>
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6575 ge zween Schuh weit hinweggeworfen. </s>
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6576 <s xml:id="echoid-s3441" xml:space="preserve">Bey nochmaliger <lb/>Wiederholung konnte er dieſe Wirkung nicht wieder her-<lb/>vorbringen.</s>
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6577 <s xml:id="echoid-s3442" xml:space="preserve"/>
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6578 </p>
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6579 <p>
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6580 <s xml:id="echoid-s3443" xml:space="preserve">Herr Marſham befeſtigte nun die Nadel, welche <lb/>der an der Flaſche entgegengeſetzt war, mit Wachs an eine <lb/>meſſingne Platte. </s>
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6581 <s xml:id="echoid-s3444" xml:space="preserve">Ließ er nunmehr die Ladung durchge-<lb/>hen, wenn die Nadeln {1/2} Zoll weit von einander abſtan-<lb/>den, ſo ward die Nadel 6 Zoll weit von der meſſingenen <lb/>Platte weggeworfen, die andere Nadel aber blieb an ihrer <lb/>Stelle. </s>
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6582 <s xml:id="echoid-s3445" xml:space="preserve">Vergrößerte er ihren Abſtand von einander, ſo <lb/>war die Wirkung noch ebendieſelbe, bis ſie auf 1 {1/2} Zoll <lb/>weit auscinander kamen, da ſie nicht mehr herausgewor-<lb/>fen wurden. </s>
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6583 <s xml:id="echoid-s3446" xml:space="preserve">In vielen Fällen wurden auch beyde heraus-<lb/>geworfen, und ließen das Wachs zurück.</s>
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6584 <s xml:id="echoid-s3447" xml:space="preserve"/>
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6585 </p>
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6586 <p>
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6587 <s xml:id="echoid-s3448" xml:space="preserve">In allen dieſen Verſuchen giengen die Nadeln durch <lb/>das Wachs, ſo daß ſie die Belegung ſowohl als die Platte <lb/>berührten; </s>
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6588 <s xml:id="echoid-s3449" xml:space="preserve">die Belegung ſowohl als die Platte waren bey <lb/>jeder Exploſion ſehr ſchön angeſchmolzen.</s>
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6589 <s xml:id="echoid-s3450" xml:space="preserve"/>
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6590 </p>
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6591 <p>
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6592 <s xml:id="echoid-s3451" xml:space="preserve">Herr Marſham nahm hierauf kleine Stücken <lb/>Kütt anſtatt des Wachſes; </s>
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6593 <s xml:id="echoid-s3452" xml:space="preserve">wenn er alsdann die Spitzen <lb/>nur {3/8} Zoll weit von einander ſtellte, und den Schlag <lb/>durchgehen ließ, ſo ward die Nadel aus der Flaſche ge-<lb/>worfen, und der Kütt auf die Nadel getrieben. </s>
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6594 <s xml:id="echoid-s3453" xml:space="preserve">Die <lb/>Spitzen wurden nunmehr einander ſo nahe, als möglich, <lb/>geſtellt, da alsdann bey der Entladung der Kütt von bey-<lb/>den Nadeln in Stücken gebrochen, und die Nadel auf eine <lb/>beträchtliche Weite fortgeworfen wurde; </s>
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6595 <s xml:id="echoid-s3454" xml:space="preserve">die meſſingene <lb/>Platte ward auch auf eine ſonderbare Art geſchmolzen, <lb/>und die Flaſche zerbrochen.</s>
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6596 <s xml:id="echoid-s3455" xml:space="preserve"/>
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6597 </p>
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6598 <p>
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6599 <s xml:id="echoid-s3456" xml:space="preserve">Ueber die Aehnlichkeit zwiſchen der Entſtehung und <lb/>den Wirkungen der Elektricität und der Wär-<lb/>me, ingleichen der Kraft, mit welcher die Kör-<lb/>per Elektricität fortleiten und Wärme anneh-<lb/>men, nebſt Beſchreibung eines Inſtruments zu
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6600 <pb o="231" file="0251" n="251" rhead="Vermiſchte Verſuche."/>
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6601 Meſſung der Quantität von elektriſcher Ma-<lb/>terie, welche Körper von verſchiedner Natur <lb/>unter ähnlichen Umſtänden fortleiten, von Herrn <lb/>Achard <anchor type="note" xlink:href="" symbol="*)"/>.</s>
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6602 <s xml:id="echoid-s3457" xml:space="preserve"/>
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6603 </p>
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6604 <p>
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6605 <s xml:id="echoid-s3458" xml:space="preserve">Die Entſtehung der Wärme hat viel ähnliches mit <lb/>der Erregung der Elektricität.</s>
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6606 <s xml:id="echoid-s3459" xml:space="preserve"/>
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6607 </p>
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6608 <p>
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6609 <s xml:id="echoid-s3460" xml:space="preserve">Alles Reiben erzeugt Wärme und erregt Elektricität. <lb/></s>
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6610 <s xml:id="echoid-s3461" xml:space="preserve">Man könnte zwar einwenden, wenn die Aehnlichkeit voll-<lb/>kommen ſeyn ſollte, ſo müßte das Reiben eines jeden Kör-<lb/>pers Elektricität erzeugen, welches doch der Erfahrung <lb/>entgegen iſt, indem die Metalle und andere leitende Kör-<lb/>per nicht anders, als durch die Berührung elektriſcher Kör-<lb/>per, und nicht durch das unmittelbare Reiben elektriſirt <lb/>werden können.</s>
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6611 <s xml:id="echoid-s3462" xml:space="preserve"/>
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6612 </p>
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6613 <p>
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6614 <s xml:id="echoid-s3463" xml:space="preserve">Man kann aber hierauf antworten, daß ein leitender <lb/>Körper, an welchem ein elektriſcher gerieben wird, wofern <lb/>er nur iſolirt iſt, eben ſo ſtarke Merkmale der Elektricität <lb/>von ſich giebt, als der elektriſche Körper ſelbſt. </s>
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6615 <s xml:id="echoid-s3464" xml:space="preserve">Dieſe <lb/>Elektricität iſt ihm nicht von dem elektriſchen mitgetheilt, <lb/>denn ſie iſt von der ganz entgegengeſetzten Art, negativ, <lb/>wenn der elektriſche Körper poſitiv elektriſirt iſt, und um-<lb/>gekehrt.</s>
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6616 <s xml:id="echoid-s3465" xml:space="preserve"/>
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6617 </p>
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6618 <p>
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6619 <s xml:id="echoid-s3466" xml:space="preserve">Dieſe Bemerkung beweiſet nicht allein, daß die lei-<lb/>tenden Körper eben ſowohl, als die elektriſchen, durch das <lb/>Reiben elektriſiret werden, ſondern ſie zeigt auch, daß zu <lb/>Erregung der Elektricität eine Zerſtörung des Gleichge-<lb/>wichts zwiſchen den Elektricitäten der reibenden Körper <lb/>erforderlich ſey; </s>
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6620 <s xml:id="echoid-s3467" xml:space="preserve">wenn jede Subſtanz gleich geſchickt iſt, <lb/>die elektriſche Materie anzunehmen und abzugeben, ſo fällt <lb/>in die Augen, daß das Gleichgewicht der Materie zwiſchen <lb/>ihnen nicht geſtört werden könne; </s>
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6621 <s xml:id="echoid-s3468" xml:space="preserve">weil die Materie, die <lb/>einer von dem andern empfängt, ſich in eben dem Augen-<lb/>
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6622 <anchor type="note" xlink:label="note-0251-01a" xlink:href="note-0251-01"/>
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6623 <pb o="232" file="0252" n="252" rhead="Sechszehntes Capitel."/>
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6624 blicke durch ihre Elaſticität wieder unter beyde vertheilet: <lb/></s>
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6625 <s xml:id="echoid-s3469" xml:space="preserve">wir können daher ſchließen,</s>
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6626 </p>
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6627 <div xml:id="echoid-div279" type="float" level="2" n="1">
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6628 <note symbol="*)" position="foot" xlink:label="note-0251-01" xlink:href="note-0251-01a" xml:space="preserve"> In den Mémoires de l’Acad. de Berlin, ann. 1779.</note>
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6629 </div>
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6630 <p>
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6631 <s xml:id="echoid-s3470" xml:space="preserve">1) daß die durchs Reiben zweener Körper erregte <lb/>Elektricität deſto ſtärker ſey, je mehr der Unterſchied @zwi-<lb/>ſchen den leitenden Kräften dieſer Körper zunimmt.</s>
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6632 <s xml:id="echoid-s3471" xml:space="preserve"/>
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6633 </p>
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6634 <p>
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6635 <s xml:id="echoid-s3472" xml:space="preserve">2) daß zween Körper, welche gleich geſchickt ſind, <lb/>die elektriſche Materie anzunehmen und abzugeben, kein <lb/>Zeichen der Elektricität von ſich geben; </s>
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6636 <s xml:id="echoid-s3473" xml:space="preserve">nicht darum, weil <lb/>ſie nicht durch Reiben elektriſirt werden könnten, ſondern <lb/>weil das durchs Reiben geſtörte Gleichgewicht in eben dem <lb/>Augenblicke durch die Leichtigkeit, mit welcher die elektri-<lb/>ſche Materie jeden Körper durchdringt, wieder hergeſtellt <lb/>wird. </s>
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6637 <s xml:id="echoid-s3474" xml:space="preserve">Aus faſt ähnlichen Urſachen werden elektriſche Kör-<lb/>per, wenn man ſie an einander reibt, nicht elektriſiret.</s>
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6638 <s xml:id="echoid-s3475" xml:space="preserve"/>
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6639 </p>
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6640 <p>
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6641 <s xml:id="echoid-s3476" xml:space="preserve">Wir dürfen alſo wohl aus dieſer auf Erfahrung ge-<lb/>gründeten Theorie ſchließen, daß die Friction in allen Fäl-<lb/>len Elektricität hervor bringe, von welcher Art auch die <lb/>geriebenen Subſtanzen ſeyn mögen; </s>
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6642 <s xml:id="echoid-s3477" xml:space="preserve">und daß dieſe Elek-<lb/>tricität bisweilen nur darum nicht merklich ſey, weil ſie <lb/>ſogleich bey ihrer Entſtehung wieder verloren geht.</s>
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6643 <s xml:id="echoid-s3478" xml:space="preserve"/>
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6644 </p>
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6645 <p>
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6646 <s xml:id="echoid-s3479" xml:space="preserve">Alle Subſtanzen, welche an einem Körper gerieben <lb/>werden, der die elektriſche Materie mit mehr oder weniger <lb/>Schwierigkeit durchläßt, als ſie ſelbſt, geben Zeichen der <lb/>Elektricität; </s>
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6647 <s xml:id="echoid-s3480" xml:space="preserve">alſo ſind die Metalle eben ſo wohl für ſich <lb/>elektriſch, als Glas und Siegellak.</s>
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6648 <s xml:id="echoid-s3481" xml:space="preserve"/>
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6649 </p>
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6650 <p>
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6651 <s xml:id="echoid-s3482" xml:space="preserve">Da alſo das Reiben allezeit und in allen Fällen <lb/>Elektricität hervorbringt, ſo findet zwiſchen der Erzeu-<lb/>gung der Wärme und der Erregung der Electricität eine <lb/>vollkommene Aehnlichkeit ſtatt.</s>
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6652 <s xml:id="echoid-s3483" xml:space="preserve"/>
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6653 </p>
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6654 </div>
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6655 <div xml:id="echoid-div281" type="section" level="1" n="270">
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6656 <head xml:id="echoid-head297" xml:space="preserve">Ferner ſind die Wirkungen der Elektricität den <lb/>Wirkungen der Wärme ähnlich.</head>
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6657 <p>
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6658 <s xml:id="echoid-s3484" xml:space="preserve">Die Wärme dehnt alle Körper aus. </s>
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6659 <s xml:id="echoid-s3485" xml:space="preserve">So beweißt <lb/>die Wirkung der elektriſchen Materie aufs Thermometer <lb/>ebenfalls die ausdehnende Kraft derſelben; </s>
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6660 <s xml:id="echoid-s3486" xml:space="preserve">und wenn wir <lb/>dieſelbe nicht in allen Fällen bemerken, ſo geſchieht dies
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6661 <pb o="233" file="0253" n="253" rhead="Vermiſchte Verſuche."/>
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6662 darum, weil die Kraft des Zuſammenhangs der Körper <lb/>ſtärker iſt, als die ausdehnende Kraft der Elektricität.</s>
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6663 <s xml:id="echoid-s3487" xml:space="preserve"/>
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6664 </p>
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6665 <p>
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6666 <s xml:id="echoid-s3488" xml:space="preserve">Die Wärme befördert nnd beſchleuniget das Auf-<lb/>keimen und die Vegetation: </s>
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6667 <s xml:id="echoid-s3489" xml:space="preserve">die Elektricität, ſie ſey poſi-<lb/>tiv oder negetiv, thut ebendaſſelbe.</s>
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6668 <s xml:id="echoid-s3490" xml:space="preserve"/>
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6669 </p>
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6670 <p>
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6671 <s xml:id="echoid-s3491" xml:space="preserve">Die Elektricität beſchleuniget die Ausdünſtung eben <lb/>ſowohl, als die Wärme.</s>
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6672 <s xml:id="echoid-s3492" xml:space="preserve"/>
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6673 </p>
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6674 <p>
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6675 <s xml:id="echoid-s3493" xml:space="preserve">Wärme und Elektricität befördern die Bewegung <lb/>des Blutes. </s>
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6676 <s xml:id="echoid-s3494" xml:space="preserve">Zwar kann die geringſte Furcht, Anſtren-<lb/>gung oder Aufmerkſamkeit auf den Verſuch den Puls be-<lb/>ſchleunigen, und dies könnte mit Unrecht der Elektricität <lb/>zugeſchrieben werden. </s>
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6677 <s xml:id="echoid-s3495" xml:space="preserve">Allein Herr Achard ſtellte den <lb/>Verſuch mit einem Hunde an, indem er ſchlief, und fand <lb/>allezeit, daß die Zahl der Pulsſchläge zunahm, wenn <lb/>das Thier elektriſirt wurde.</s>
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6678 <s xml:id="echoid-s3496" xml:space="preserve"/>
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6679 </p>
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diff changeset
6680 <p>
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6681 <s xml:id="echoid-s3497" xml:space="preserve">Herrn Achard’s und anderer Verſuche mit Hü-<lb/>nereyern und Fliegeneyern beweiſen, daß die Elektricität <lb/>ſowohl als die Wärme, die Entwickelung dieſer Thiere <lb/>begünſtiget. </s>
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6682 <s xml:id="echoid-s3498" xml:space="preserve">Die elektriſche Materie ſchmelzt auch Me-<lb/>talle, eben ſo, wie das Feuer.</s>
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diff changeset
6683 <s xml:id="echoid-s3499" xml:space="preserve"/>
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6684 </p>
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6685 <p>
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6686 <s xml:id="echoid-s3500" xml:space="preserve">Wenu ſich ungleich erwärmte Körper berühren, ſo <lb/>vertheilt ſich die Wärme gleichförmig unter ſie. </s>
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6687 <s xml:id="echoid-s3501" xml:space="preserve">Eben ſo <lb/>ſtellt ſich das Gleichgewicht her, wenn ſich zween Körper <lb/>mit ungleichen Graden oder verſchiedenen Arten von Elek-<lb/>tricität berühren.</s>
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diff changeset
6688 <s xml:id="echoid-s3502" xml:space="preserve"/>
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6689 </p>
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6690 <p>
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diff changeset
6691 <s xml:id="echoid-s3503" xml:space="preserve">Endlich findet auch zwiſchen der Fähigkeit der Körper, <lb/>die Elektricität zu leiten, und Wärme anzu-<lb/>nehmen, eine vollkommene Aehnlichkeit ſtatt.</s>
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diff changeset
6692 <s xml:id="echoid-s3504" xml:space="preserve"/>
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6693 </p>
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diff changeset
6694 <p>
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6695 <s xml:id="echoid-s3505" xml:space="preserve">Wenn Körper von verſchiedener Art und von glei-<lb/>chen Graden der Wärme in ein Mittel von verſchiedener <lb/>Temperatur geſtellt werden, ſo nehmen ſie nach Verlauf <lb/>einer gewiſſen Zeit alle einen gleichen Grad der Wärme <lb/>an. </s>
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diff changeset
6696 <s xml:id="echoid-s3506" xml:space="preserve">Inzwiſchen bleibt noch immer ein beträchtlicher Un-<lb/>terſchied in der Größe des Zeitraums, in welchem ſie die <lb/>Temperatur des Mittels annehmen, z. </s>
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6697 <s xml:id="echoid-s3507" xml:space="preserve">B. </s>
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6698 <s xml:id="echoid-s3508" xml:space="preserve">die Metalle
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6699 <pb o="234" file="0254" n="254" rhead="Sechszehntes Capitel."/>
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6700 brauchen weniger Zeit als Glas, um gleiche Grade der <lb/>Wärme anzunehmen oder zu verlieren.</s>
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6701 <s xml:id="echoid-s3509" xml:space="preserve"/>
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6702 </p>
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6703 <p>
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6704 <s xml:id="echoid-s3510" xml:space="preserve">Bey aufmerkſamer Unterſuchung derer Körper, wel-<lb/>che ihre Wärme am ſchnellſten annehmen und verlieren, <lb/>wenn ſie in Mittel von verſchiedener Temperatur geſtellt <lb/>werden, findet man, daß es ebendieſelben Körper ſind, <lb/>welche am leichteſten Elektricität annehmen und verlieren. <lb/></s>
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6705 <s xml:id="echoid-s3511" xml:space="preserve">Die Metalle, welche am geſchwindeſten warm und wie-<lb/>der kalt werden, nehmen auch am ſchnellſten Elektricität <lb/>an und theilen ſie wieder mit. </s>
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6706 <s xml:id="echoid-s3512" xml:space="preserve">Holz, welches mehr Zeit <lb/>erfodert, um erwärmt und abgekühlt zu werden, erhält <lb/>und verliert auch ſeine Elektricität langſamer. </s>
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6707 <s xml:id="echoid-s3513" xml:space="preserve">Endlich <lb/>Glas und harzige Subſtanzen, welche die elektriſche Ma-<lb/>terie ſehr langſam annehmen und verlieren, nehmen auch <lb/>die Temperatur des ſie umgebenden Mittels nicht anders, <lb/>als mit Schwierigkeit, an.</s>
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6708 <s xml:id="echoid-s3514" xml:space="preserve"/>
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6709 </p>
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6710 <p>
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6711 <s xml:id="echoid-s3515" xml:space="preserve">Wenn man das eine Ende eines eiſernen Stabs glü-<lb/>hend macht, ſo wird das andere Ende, wenn gleich der <lb/>Stab mehrere Schuhe lang iſt, in kurzer Zeit ſo heiß, <lb/>daß man die Hand nicht daran halten kann, weil das Ei-<lb/>ſen die Hitze ſehr leicht leitet; </s>
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6712 <s xml:id="echoid-s3516" xml:space="preserve">da man hingegen eine Glas-<lb/>röhre, wenn ſie auch nur wenige Zolle lang iſt, ſicher in <lb/>der Hand halten kann, wenn gleich ihr anderes Ende <lb/>ſchmelzet. </s>
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6713 <s xml:id="echoid-s3517" xml:space="preserve">Eben ſo geht die elektriſche Materie mit groſ-<lb/>ſer Geſchwindigkeit von einem Ende eines Stabs zum an-<lb/>dern über; </s>
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6714 <s xml:id="echoid-s3518" xml:space="preserve">hingegen vergeht eine lange Zeit, ehe eine Glas-<lb/>röhre, an deren Ende man einen geriebenen elektriſchen Kör-<lb/>per hält, am andern Ende Zeichen einer Elektricität giebt.</s>
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6715 <s xml:id="echoid-s3519" xml:space="preserve"/>
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6716 </p>
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6717 <p>
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6718 <s xml:id="echoid-s3520" xml:space="preserve">Dieſe Bemerkungen beweiſen, daß verſchiedene Kör-<lb/>per, welche ihren Grad der Wärme ſchwer annehmen und <lb/>verlieren, auch ihre Elektricität ſchwer erhalten und abge-<lb/>ben. </s>
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6719 <s xml:id="echoid-s3521" xml:space="preserve">Um zu beſtimmen, ob dieſes Geſetz allgemein ſey, <lb/>und welches die Ausnahmen davon ſind, werden noch <lb/>viele Verſuche erfordert.</s>
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6720 <s xml:id="echoid-s3522" xml:space="preserve"/>
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6721 </p>
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6722 <p>
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6723 <s xml:id="echoid-s3523" xml:space="preserve">Wenn wir zwo Subſtanzen annehmen, deren eine <lb/>elektriſirt iſt, die andere aber nicht, deren erſte einen be-
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6724 <pb o="235" file="0255" n="255" rhead="Vermiſchte Verſuche."/>
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6725 kannten Grad von Elektricität hat, die letzte aber, indem <lb/>ſie die erſte berührt, ihr einen gegebnen Grad von Elek-<lb/>tricität raubet; </s>
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6726 <s xml:id="echoid-s3524" xml:space="preserve">ſo beſtimmt dieſer Verluſt die Leichtigkeit, <lb/>mit welcher der berührende Körper die elektriſche Materie <lb/>annimmt. </s>
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6727 <s xml:id="echoid-s3525" xml:space="preserve">Außer der Geſtalt und dem Volumen dieſer <lb/>Subſtanz, macht auch die Zeit, durch welche beyde Kör-<lb/>per in Berührung bleiben, eine Veränderung in der <lb/>Quantität, welche aus der elektriſirten Subſtanz über-<lb/>geht; </s>
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6728 <s xml:id="echoid-s3526" xml:space="preserve">ſo daß unter übrigens gleichen Umſtänden, die Fä-<lb/>higkeit der Körper, andere ihrer Elektricität zu berauben, <lb/>oder mit andern Worten, die elektriſche Materie fortzulei-<lb/>ten, ſich umgekehrt verhält, wie die Zeit, welche nöthig <lb/>iſt, um den Körpern einen gleichen Grad von Elektricität <lb/>zu entziehen.</s>
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6729 <s xml:id="echoid-s3527" xml:space="preserve"/>
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6730 </p>
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6731 <p>
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6732 <s xml:id="echoid-s3528" xml:space="preserve">Das Fig. </s>
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6733 <s xml:id="echoid-s3529" xml:space="preserve">95 vorgeſtellte Werkzeug iſt auf dieſe <lb/>Grundſätze gebaut, und es kann dadurch die Menge von <lb/>Elektricität, welche ein Körper in einer gegebnen Zeit <lb/>verliert, wenn er von einem andern berührt wird, genau <lb/>beſtimmt werden. </s>
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6734 <s xml:id="echoid-s3530" xml:space="preserve">A B iſt eine ſehr empfindliche Wage; <lb/></s>
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6735 <s xml:id="echoid-s3531" xml:space="preserve">am Ende jedes Arms befindet ſich eine ſehr leichte küpfer-<lb/>ne Kugel; </s>
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6736 <s xml:id="echoid-s3532" xml:space="preserve">C F D iſt ein getheilter Halbkreis, an die Un-<lb/>terlage befeſtiget, auf welcher die Are der Wage ruhet; </s>
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6737 <s xml:id="echoid-s3533" xml:space="preserve"><lb/>die Grade können durch eine Nadel, oder durch die Arme <lb/>der Wage ſelbſt gezeigt werden; </s>
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6738 <s xml:id="echoid-s3534" xml:space="preserve">die Unterlage iſt an einer <lb/>meſſingenen Haube feſt, welche auf die Glasſäule G G ge-<lb/>küttet iſt; </s>
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6739 <s xml:id="echoid-s3535" xml:space="preserve">dieſe Glasſäule ſteht auf dem Brete Q R S T, <lb/>und iſt wenigſtens 18 Zoll hoch. </s>
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6740 <s xml:id="echoid-s3536" xml:space="preserve">U iſt eine leidner Fla-<lb/>ſche; </s>
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6741 <s xml:id="echoid-s3537" xml:space="preserve">an den mit der innern Belegung verbundenen Drath <lb/>Z Z ſind drey horizontale Dräthe V Z, X Z, Y Z befeſti-<lb/>get, und deren Enden mit hohlen meſſingenen Kugeln <lb/>verſehen; </s>
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6742 <s xml:id="echoid-s3538" xml:space="preserve">die Flaſche U iſt ſo auf das Bret befeſtiget, daß <lb/>bey horizontaler Stellung der Wage, die Kugeln B und X <lb/>einander berühren, wie dies in der Figur vorgeſtellt wird.</s>
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6743 <s xml:id="echoid-s3539" xml:space="preserve"/>
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6744 </p>
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6745 <p>
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6746 <s xml:id="echoid-s3540" xml:space="preserve">K N iſt ein metallener Hebel, der ſich bey I ſo um <lb/>eine Are bewegt, daß er ſich frey in der Verticalfläche <lb/>drehen kann, welche durch den Stab V X geht; </s>
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6747 <s xml:id="echoid-s3541" xml:space="preserve">er wird
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6748 <pb o="236" file="0256" n="256" rhead="Sechszehntes Capitel. Vermiſchte Verſuche."/>
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diff changeset
6749 von der hölzernen Säule I H getragen, welche auf dem <lb/>Brete Q R S T aufſteht; </s>
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6750 <s xml:id="echoid-s3542" xml:space="preserve">am Ende K befindet ſich eine <lb/>Schraube, um die Subſtanz zu halten, mit welcher man <lb/>den Verſuch anſtellen will; </s>
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6751 <s xml:id="echoid-s3543" xml:space="preserve">das obere Ende dieſer Sub-<lb/>ſtanz muß eine convere Geſtalt haben. </s>
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6752 <s xml:id="echoid-s3544" xml:space="preserve">Am andern Ende <lb/>des Hebels N befindet ſich der Drath N O mit dem klei-<lb/>nen Hacken O, an welchen man die Kugel P hängen kann. <lb/></s>
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6753 <s xml:id="echoid-s3545" xml:space="preserve">Der Abſtand der Säule I H von der Flaſche wird ſo ein-<lb/>gerichtet, daß, wenn das Ende N niedergeht, der Körper <lb/>L die Kugel V in einem Punkte berührt; </s>
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6754 <s xml:id="echoid-s3546" xml:space="preserve">die Proportion <lb/>zwiſchen den Gewichten der Arme des Hebels, dem Ge-<lb/>wichte P und dem Körpor L, auch zwiſchen den Längen <lb/>der Säule I H und des Draths N O iſt ſo einzurichten, <lb/>daß, wenn die Subſtanz L den Ball V berührt, die Ku-<lb/>gel P in eben dem Augenblicke das Bret Q R S T berühre, <lb/>und ſich von dem Drathe N O losmache; </s>
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6755 <s xml:id="echoid-s3547" xml:space="preserve">auf dieſe Art <lb/>wird auch die Subſtanz L in eben dem Augenblicke die <lb/>Kugel V verlaſſen.</s>
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6756 <s xml:id="echoid-s3548" xml:space="preserve"/>
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6757 </p>
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6758 <p>
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6759 <s xml:id="echoid-s3549" xml:space="preserve">Um dieſes Inſtrument zu gebrauchen, verbinde man <lb/>die Flaſche U mit dem erſten Leiter durch die Kugel Y, <lb/>mache vermittelſt eines Draths eine Verbindung zwiſchen <lb/>Y und der Haube G, und lade die Flaſche, ſo wird die <lb/>Kugel X den Ball B zurückſtoßen, und der Arm der <lb/>Wage wird den Repulſionswinkel bemerken. </s>
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6760 <s xml:id="echoid-s3550" xml:space="preserve">Geſetzt, <lb/>dieſer ſey 20 Grad. </s>
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6761 <s xml:id="echoid-s3551" xml:space="preserve">Man bringe nunmehr, wie im vo-<lb/>rigen beſchrieben worden iſt, L in Berührung mit V, ſo <lb/>wird es eine Quantität von elektriſcher Materie in ſich <lb/>nehmen, die ihrer leitenden Kraft proportional iſt, die <lb/>Kugel B wird in Proportion mit dieſer verlohrnen Quan-<lb/>tität herabſinken, und man wird die Größe des Unter-<lb/>ſchieds an dem Halbcirkel bemerken können; </s>
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6762 <s xml:id="echoid-s3552" xml:space="preserve">ſie ſey 5 <lb/>Grad. </s>
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6763 <s xml:id="echoid-s3553" xml:space="preserve">Man wiederhole nun den Verſuch mit einer an-<lb/>dern Subſtanz anſtatt des Körpers L: </s>
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6764 <s xml:id="echoid-s3554" xml:space="preserve">geſetzt bey dieſer <lb/>Subſtanz betrage die Verminderung 8 Grad, ſo verhal-<lb/>ten ſich die leitenden Kräfte dieſer Subſtanzen, wie 5: </s>
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6765 <s xml:id="echoid-s3555" xml:space="preserve">8.</s>
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6766 <s xml:id="echoid-s3556" xml:space="preserve"/>
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6767 </p>
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6768 <pb file="0257" n="257"/>
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6769 </div>
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6770 <div xml:id="echoid-div282" type="section" level="1" n="271">
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6771 <head xml:id="echoid-head298" xml:space="preserve">Verſuch <lb/>über den <lb/>Magnetiſmus.</head>
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6772 <pb file="0258" n="258"/>
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6773 <pb file="0259" n="259"/>
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6774 </div>
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6775 <div xml:id="echoid-div283" type="section" level="1" n="272">
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6776 <head xml:id="echoid-head299" xml:space="preserve">Verſuch <lb/>über den <lb/>Magnetiſmus.</head>
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6777 <p>
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6778 <s xml:id="echoid-s3557" xml:space="preserve">Die Erſcheinungen des Magnets haben zwar ſchon <lb/>ſeit vielen Jahrhunderten, nicht allein wegen ihrer <lb/>beſondern Wichtigkeit, ſondern auch wegen der Dunkel-<lb/>heit, in welche ſie verhüllt ſind, die Aufmerkſamkeit der <lb/>Naturforſcher auf ſich gezogen; </s>
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6779 <s xml:id="echoid-s3558" xml:space="preserve">aber dennoch iſt zu den <lb/>Entdeckungen der erſten Unterſucher dieſer Materie ſehr <lb/>wenig hinzugeſetzt worden. </s>
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6780 <s xml:id="echoid-s3559" xml:space="preserve">Alle Kräfte des Genies, wel-<lb/>che man bisher zu Betreibung dieſes Gegenſtandes aufge-<lb/>boten hat, ſind nicht vermögend geweſen, eine Hypotheſe <lb/>aufzubringen, welche alle die mannichfaltigen Eigenſchaf-<lb/>ten des Magnets auf eine leichte und genugthuende Art <lb/>zu erklären im Stande wäre, oder die Glieder der Kette <lb/>angäbe, durch welche dieſe merkwürdigen Erſcheinungen mit <lb/>den übrigen Phänomenen der Natur zuſammenhängen.</s>
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6781 <s xml:id="echoid-s3560" xml:space="preserve"/>
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6782 </p>
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6783 <p>
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6784 <s xml:id="echoid-s3561" xml:space="preserve">Aus den Schriften des Plato und Ariſtoteles <lb/>erhellet, daß ſchon die Alten die anziehenden und zurück-<lb/>ſtoßenden Kräfte des Magnets gekannt haben: </s>
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6785 <s xml:id="echoid-s3562" xml:space="preserve">man fin-<lb/>det aber nicht, daß ihnen die Richtung deſſelben nach dem <lb/>Pole oder der Gebrauch des Compaſſes bekannt geweſen <lb/>wäre. </s>
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6786 <s xml:id="echoid-s3563" xml:space="preserve">Da ſie noch nicht mit der gehörigen Methode, die <lb/>Natur zu unterſuchen, bekannt waren, und ſich bloß mit <lb/>den in die Augen fallenden Beobachtungen befriedigten, ſo <lb/>waren ihre Kenntniſſe der Natur in ſehr enge Grenzen <lb/>eingeſchloſſen, und brachten der menſchlichen Geſellſchaft <lb/>keine großen Vortheile. </s>
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6787 <s xml:id="echoid-s3564" xml:space="preserve">Die neuern Naturforſcher hin-<lb/>gegen, welche die Beobachtungen mit Verſuchen ver-<lb/>banden, erweiterten gar bald die Grenzen dieſer Wiſſen-<lb/>ſchaft, und entdeckten die Polarität des Magnets, eine <lb/>Eigenſchaft, auf welcher gewiſſermaßen die ganze Schiff-<lb/>fahrt und die Seele der Handlung beruht.</s>
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6788 <s xml:id="echoid-s3565" xml:space="preserve"/>
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6789 </p>
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6790 <pb o="240" file="0260" n="260" rhead="Verſuch"/>
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6791 <p>
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6792 <s xml:id="echoid-s3566" xml:space="preserve">Der rohe oder natürliche Magnet iſt ein Eiſenerz, <lb/>welches in der Erde, gemeiniglich in Eiſengruben, gefun-<lb/>den wird; </s>
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6793 <s xml:id="echoid-s3567" xml:space="preserve">man findet ihn unter allerley Geſtalten und <lb/>Größen, und von verſchiedenen Farben.</s>
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6794 <s xml:id="echoid-s3568" xml:space="preserve"/>
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6795 </p>
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6796 <p>
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6797 <s xml:id="echoid-s3569" xml:space="preserve">Die Magnete ſind insgemein ſehr hart und brüchig, <lb/>und mehrentheils deſto ſtärker, je härter ſie ſind. </s>
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6798 <s xml:id="echoid-s3570" xml:space="preserve">Man <lb/>kann aus ihnen einen beträchtlichen Theil Eiſen zie-<lb/>hen. </s>
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6799 <s xml:id="echoid-s3571" xml:space="preserve">Nach Neumann laſſen ſie ſich faſt gänzlich in <lb/>Scheldewaſſer, und zum Theil in der Vitriol – und Salz-<lb/>ſäure auflöſen.</s>
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6800 <s xml:id="echoid-s3572" xml:space="preserve"/>
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6801 </p>
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6802 <p>
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6803 <s xml:id="echoid-s3573" xml:space="preserve">Die aus Stahl verfertigten künſtlichen Magnete <lb/>werden jetzt durchgängig lieber, als die natürlichen, ge-<lb/>braucht; </s>
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6804 <s xml:id="echoid-s3574" xml:space="preserve">nicht allein, weil man ſie leichter anſchaffen <lb/>kann, ſondern auch; </s>
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6805 <s xml:id="echoid-s3575" xml:space="preserve">weil ſie die natürlichen an Stärke <lb/>weit übertreffen, die magnetiſche Kraft ſtärker mitthei-<lb/>len, und in ihrer Geſtalt leichter verändert werden können.</s>
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6806 <s xml:id="echoid-s3576" xml:space="preserve"/>
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6807 </p>
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6808 <p>
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6809 <s xml:id="echoid-s3577" xml:space="preserve">Die Kraft des Magnets, welche ſich auch dem Ei-<lb/>ſen und Stahle mitcheilen läßt, wird der Magnetiſ-<lb/>mus genennt.</s>
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6810 <s xml:id="echoid-s3578" xml:space="preserve"/>
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6811 </p>
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6812 <p>
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6813 <s xml:id="echoid-s3579" xml:space="preserve">Ein eiſerner oder ſtählerner Stab, dem man eine <lb/>beſtändige Polarität mitgetheilt hat, heißt ein künſt-<lb/>licher Magnet.</s>
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6814 <s xml:id="echoid-s3580" xml:space="preserve"/>
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6815 </p>
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6816 <p>
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6817 <s xml:id="echoid-s3581" xml:space="preserve">Die Punkte des Magnets, welche dem Anſcheine <lb/>nach die meiſte Kraft beſitzen, oder in welchen ſeine Kraft <lb/>concentrirt zu ſeyn ſcheinet, heiſſen Pole des Magnets</s>
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6818 </p>
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6819 <p>
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6820 <s xml:id="echoid-s3582" xml:space="preserve">Der magnetiſche Meridian iſt ein Verticalkreis am <lb/>Himmel, welcher den Horizont in denjenigen Punkten <lb/>ſchneidet, nach welchen die Magnetnadei, wenn ſie ruhet, <lb/>gerichtet iſt.</s>
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6821 <s xml:id="echoid-s3583" xml:space="preserve"/>
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6822 </p>
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6823 <p>
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6824 <s xml:id="echoid-s3584" xml:space="preserve">Die Are eines Magnets iſt eine gerade Linie, wel-<lb/>che von einem ſeiner Pole zum andern geht.</s>
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6825 <s xml:id="echoid-s3585" xml:space="preserve"/>
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6826 </p>
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6827 <p>
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6828 <s xml:id="echoid-s3586" xml:space="preserve">Der Aequator eines Magnets iſt eine auf ſeiner <lb/>Are ſenkrecht ſtehende Linie, genau mitten zwiſchen bey-<lb/>den Polen.</s>
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6829 <s xml:id="echoid-s3587" xml:space="preserve"/>
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6830 </p>
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6831 <p>
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6832 <s xml:id="echoid-s3588" xml:space="preserve">Die unterſcheidenden und charakteriſtiſchen Eigen-<lb/>ſchaften eines Magnets ſind folgende:</s>
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6833 <s xml:id="echoid-s3589" xml:space="preserve"/>
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6834 </p>
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6835 <pb o="241" file="0261" n="261" rhead="über den Magnetiſmus."/>
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6836 <p>
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6837 <s xml:id="echoid-s3590" xml:space="preserve">1) ſeine anziehenden und zurückſtoßenden Kräfte.</s>
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6838 <s xml:id="echoid-s3591" xml:space="preserve"/>
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6839 </p>
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6840 <p>
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6841 <s xml:id="echoid-s3592" xml:space="preserve">2) die Kraft, mit welcher er ſich, wenn er frey <lb/>aufgehangen wird, in eine gewiſſe Richtung gegen die <lb/>Pole der Erde ſtellt.</s>
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6842 <s xml:id="echoid-s3593" xml:space="preserve"/>
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6843 </p>
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6844 <p>
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6845 <s xml:id="echoid-s3594" xml:space="preserve">3) ſeine Neigung oder Inclination gegen einen <lb/>Punkt unter dem Horizont.</s>
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6846 <s xml:id="echoid-s3595" xml:space="preserve"/>
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6847 </p>
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6848 <p>
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6849 <s xml:id="echoid-s3596" xml:space="preserve">4) die Eigenſchaft, vorerwähnte Kräfte dem Eiſen <lb/>oder Stahl mitzutheilen.</s>
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6850 <s xml:id="echoid-s3597" xml:space="preserve"/>
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6851 </p>
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6852 </div>
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6853 <div xml:id="echoid-div284" type="section" level="1" n="273">
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6854 <head xml:id="echoid-head300" xml:space="preserve">Hypotheſe.</head>
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6855 <p>
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6856 <s xml:id="echoid-s3598" xml:space="preserve">Herr @uler nimmt an, daß die zwo Haupturſa-<lb/>chen der wunderbaren Eigenſchaften des Magnets, er-<lb/>ſtens in der beſondern Structur der innern Poren des <lb/>Magnets und der magnetiſchen Körper, und zweytens in <lb/>einer äußern Triebfeder oder einer flüßigen Materie beſte-<lb/>hen, welche auf dieſe Poren wirkt und durch ſie hindurch-<lb/>gehet. </s>
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6857 <s xml:id="echoid-s3599" xml:space="preserve">Er glaubt, dieſe flüßige Materie ſey die Atmo-<lb/>ſphäre der Sonne oder der ſogenannte Aether, welcher un-<lb/>ſer ganzes Syſtem erfüllet.</s>
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6858 <s xml:id="echoid-s3600" xml:space="preserve"/>
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6859 </p>
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6860 <p>
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6861 <s xml:id="echoid-s3601" xml:space="preserve">Die meiſten Schriftſteller über dieſen Gegenſtand <lb/>vereinigen ſich darinn, daß es kleine Körper von beſonde-<lb/>rer Geſtalt und Wirkſamkeit gebe, welche um und durch <lb/>den Magnet einen beſtändigen Umlauf machen; </s>
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6862 <s xml:id="echoid-s3602" xml:space="preserve">und daß <lb/>ein Wirbel von eben dieſer Art um und durch die Erde gehe.</s>
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6863 <s xml:id="echoid-s3603" xml:space="preserve"/>
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6864 </p>
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6865 <p>
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6866 <s xml:id="echoid-s3604" xml:space="preserve">Ein Magnet hat außer den Zwiſchenräumen, die <lb/>ihm mit andern Körpern gemein ſind, noch andere ſehr <lb/>viel kleinere Poren, welche bloß für den Durchgang der <lb/>magnetiſchen Materie beſtimmt ſind. </s>
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6867 <s xml:id="echoid-s3605" xml:space="preserve">Dieſe ſind ſo ge-<lb/>ſtellt, daß ſie mit einander communiciren, und Röhren <lb/>oder Canäle ausmachen, durch welche die magnetiſche <lb/>Materie von einem Ende zum andern kommen kann. </s>
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6868 <s xml:id="echoid-s3606" xml:space="preserve">Sie <lb/>ſind aber ſo geſtaltet, daß die magnetiſche Materie nur <lb/>nach einer einzigen Richtung hindurch kommen, aber <lb/>nicht durch eben den Weg wieder zurück gehen kann: </s>
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6869 <s xml:id="echoid-s3607" xml:space="preserve">ſo, <lb/>wie die Blutadern und lymphatiſchen Gefäße des thieri-<lb/>ſchen Körpers, welche in dieſer Abſicht mit Klappen ver-
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6870 <pb o="242" file="0262" n="262" rhead="Verſuch"/>
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6871 ſchen ſind: </s>
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6872 <s xml:id="echoid-s3608" xml:space="preserve">duß man ſich alſo die Poren als mehrere enge <lb/>neben einander liegende und mit einander parallel laufende <lb/>Röhren vorſtellen kann, wie bey A B, Fig. </s>
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6873 <s xml:id="echoid-s3609" xml:space="preserve">99.</s>
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6874 <s xml:id="echoid-s3610" xml:space="preserve">, durch <lb/>welche die feinern Theile des Aethers frey von A nach B <lb/>kommen, aber wegen des Widerſtandes, den ſie bey <lb/>a, a, b, b antreffen, nicht wieder zurückkommen, auch <lb/>den Widerſtand des gröbern Aethers nicht überwinden <lb/>können, welcher ihre Bewegung veranlaſſet und unterhält. <lb/></s>
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6875 <s xml:id="echoid-s3611" xml:space="preserve">Denn, wenn man annimmt, der Pol A eines Magnets <lb/>ſey mit mehreren Oefnungen ſolcher Röhren angefüllt, ſo <lb/>wird die magnetiſche Materie, welche von den gröbern <lb/>Theilen des Aethers fortgetrieben wird, mit einer unge-<lb/>meinen Geſchwindigkeit, welche ſich nach der Elaſticität <lb/>des Aethers ſelbſt richtet, nach B gehen; </s>
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6876 <s xml:id="echoid-s3612" xml:space="preserve">dieſe Materie, <lb/>welche, ehe ſie in B ankam, von den gröbern Theilen des <lb/>Aethers durch die Röhren getrennt ward, trift nun wie-<lb/>der dergleichen gröbere Theile an, wodurch ihre Geſchwin-<lb/>digkeit vermindert, und ihre Richtung geändert wird; </s>
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6877 <s xml:id="echoid-s3613" xml:space="preserve">da-<lb/>her wird der vom Aether, mit welchem er ſich nicht ſo-<lb/>gleich vermiſchen kann, zurückgebogne Strom auf beyde <lb/>Seiten nach C und D gelenket, beſchreibt, wiewohl mit <lb/>geringerer Geſchwindigkeit, die krummen Linien D E und <lb/>C F e, fällt endlich in den Strom der bey m m zuflieſ-<lb/>ſenden Materie, geht wieder in den Magnet, und bildet <lb/>dadurch den merkwürdigeu Wirbel, welcher ſichtbar wird, <lb/>wenn man Stahlfeile auf ein über den Magnet gelegtes <lb/>Papier ſchüttet.</s>
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6878 <s xml:id="echoid-s3614" xml:space="preserve"/>
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6879 </p>
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6880 </div>
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6881 <div xml:id="echoid-div285" type="section" level="1" n="274">
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6882 <head xml:id="echoid-head301" xml:space="preserve">Im Eiſen und im Magnet liegt ein Beſtreben, ſich <lb/>einander zu nähern, und ſich an einander zu <lb/>hängen und zwar mit ſo viel Kraft, daß oft <lb/>ein beträchtliches Gewicht erfordert wird, um <lb/>ſie von einander zu trennen.</head>
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6883 <p>
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6884 <s xml:id="echoid-s3615" xml:space="preserve">Man kann dieſe ſonderbaren Phänomene durch <lb/>jeden Magnet beweiſen; </s>
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6885 <s xml:id="echoid-s3616" xml:space="preserve">jeder trägt ein ſchwereres <lb/>oder leichteres Gewicht nach Proportion ſeiner Stärke.</s>
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6886 <s xml:id="echoid-s3617" xml:space="preserve"/>
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6887 </p>
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6888 <pb o="243" file="0263" n="263" rhead="über den Magnetiſmus."/>
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6889 <p>
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6890 <s xml:id="echoid-s3618" xml:space="preserve">Man ſtecke ein Stück Eiſen auf einen Kork, und <lb/>ſetze den Kork auf Waſſer, ſo wird das Eiſen auf eine ſehr <lb/>beluſtigende Art vom Magnete angezogen, und folgt dem-<lb/>ſelben überall nach.</s>
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6891 <s xml:id="echoid-s3619" xml:space="preserve"/>
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6892 </p>
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6893 <p>
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6894 <s xml:id="echoid-s3620" xml:space="preserve">Auf dieſen Grundſatz hat man viele ſinnreiche und <lb/>unterhaltende mechaniſche Kunſtſtücke gebaut. </s>
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6895 <s xml:id="echoid-s3621" xml:space="preserve">Man kann <lb/>z. </s>
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6896 <s xml:id="echoid-s3622" xml:space="preserve">B. </s>
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6897 <s xml:id="echoid-s3623" xml:space="preserve">kleine Schwäne verfertigen, welche auf dem Waſ-<lb/>ſer ſchwimmen, und die Tagesſtunde angeben.</s>
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6898 <s xml:id="echoid-s3624" xml:space="preserve"/>
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6899 </p>
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6900 <p>
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6901 <s xml:id="echoid-s3625" xml:space="preserve">Man ſtelle einen Magnet auf ein meſſingenes Sta-<lb/>tiv, und halte das Ende einer kleinen Nadel gegen denſel-<lb/>ben, das andere Ende halte man durch einen Drath, da-<lb/>mit ſich die Nadel nicht ganz an den Magnet hängen kön-<lb/>ne, ſo wird man die Nadel auf eine ſehr angenehme Art <lb/>in der Luft ſchweben ſehen.</s>
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6902 <s xml:id="echoid-s3626" xml:space="preserve"/>
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6903 </p>
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6904 <p>
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6905 <s xml:id="echoid-s3627" xml:space="preserve">Man hänge einen Magnet unten an die Schale ei-<lb/>ner Wage, und lege in die andere Schale ſo viel Gegen-<lb/>gewicht, als nöthig iſt. </s>
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6906 <s xml:id="echoid-s3628" xml:space="preserve">Nun halte man ein Stück Eiſen <lb/>gegen den Magnet, ſo wird er ſich ſogleich ſenken, und an <lb/>das Eiſen hängen, wenn der Abſtand deſſelben nicht all-<lb/>zugroß iſt. </s>
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6907 <s xml:id="echoid-s3629" xml:space="preserve">Man hänge dann das Eifen anſtatt des <lb/>Magnets an die Wage, und bringe den Magnet dagegen, <lb/>ſo wird das Eiſen herabſinken und ſich an den Magnet <lb/>hängen.</s>
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6908 <s xml:id="echoid-s3630" xml:space="preserve"/>
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6909 </p>
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6910 </div>
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6911 <div xml:id="echoid-div286" type="section" level="1" n="275">
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6912 <head xml:id="echoid-head302" xml:space="preserve">Man kann die Kräfte oder Eigenſchaften des Mag. <lb/>nets dem Eiſen und Stahle mittheilen.</head>
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6913 <p>
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6914 <s xml:id="echoid-s3631" xml:space="preserve">Eine Beſchreibung der verſchiedenen Methoden, wel, <lb/>che man vorgeſchlagen hat, um dem Eiſen oder Stahle <lb/>die Eigenſchaften des Magnets mitzutheilen, würde allein <lb/>einen ganzen Band ausfüllen. </s>
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6915 <s xml:id="echoid-s3632" xml:space="preserve">Ich will daher bloß zwo <lb/>allgemeine und gute Methoden anführen, welche meines <lb/>Erachtens zu allen gewöhnlichen Abſichten hinreichend <lb/>ſind.</s>
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6916 <s xml:id="echoid-s3633" xml:space="preserve"/>
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6917 </p>
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6918 <p>
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6919 <s xml:id="echoid-s3634" xml:space="preserve">1) Man ſtelle zween magnetiſche Stäbe A B, Fig. <lb/></s>
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6920 <s xml:id="echoid-s3635" xml:space="preserve">100 ſo, daß das nördliche oder gezeichnete Ende des einen,
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6921 <pb o="244" file="0264" n="264" rhead="Verſuch"/>
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6922 dem ſüdlichen oder unbezeichneten Ende des andern entge, <lb/>gen gekehrt iſt: </s>
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6923 <s xml:id="echoid-s3636" xml:space="preserve">ſie müſſen aber ſo weit von einander lie-<lb/>gen, deß der Stab C, welcher berührt werden ſoll, mit <lb/>ſeinem bezeichneten Ende auf dem unbezeichneten Ende <lb/>von A, und mit ſeinem unbezeichneten Ende auf dem be-<lb/>zeichneten von B aufliegen kann. </s>
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6924 <s xml:id="echoid-s3637" xml:space="preserve">Nunmehr lege man das <lb/>nördliche Ende des Magnets D und das ſüdliche von E <lb/>auf die Mitte des Stabs C zuſammen, hebe das andere <lb/>Ende in die Höhe, wie die Figur vorſtellet; </s>
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6925 <s xml:id="echoid-s3638" xml:space="preserve">ziehe D und <lb/>E aus einander und längſt dem Stabe C hin, das eine <lb/>gegen A, das andere gegen B, behalte immer dieſelbe <lb/>Schiefe bey, und entferne D und E, wenn ſie von den En-<lb/>den des Stabs C hinweg ſind, ein bis zwey Schuhe weit <lb/>von denſelben; </s>
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6926 <s xml:id="echoid-s3639" xml:space="preserve">bringe hierauf den Nord- und Südpol <lb/>dieſer Magnete aufs neue zuſammen, und lege ſie wieder, <lb/>wie vorher, auf die Mitte des Stabs C. </s>
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6927 <s xml:id="echoid-s3640" xml:space="preserve">Dieſes Verfah-<lb/>ren wiederhole man fünf oder ſechsmal, beſtreiche die ent-<lb/>gegengeſetzte Fläche des Stabs C auf eben dieſe Art, <lb/>und, nachher auch noch die beyden übrigen Seitenflächen, <lb/>ſo wird dieſer Stab dadurch eine ſtarke und anhaltende <lb/>magnetiſche Kraft erlangen.</s>
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6928 <s xml:id="echoid-s3641" xml:space="preserve"/>
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6929 </p>
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6930 <p>
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6931 <s xml:id="echoid-s3642" xml:space="preserve">2) Man lege die zween Stäbe, welche beſtrichen <lb/>werden ſollen, parallel mit einander, und verbinde ihre <lb/>Enden durch zwo eiſerne Unterlagen, um während der <lb/>Operation den Umlauf der magnetiſchen Materie zu ver-<lb/>hüten; </s>
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6932 <s xml:id="echoid-s3643" xml:space="preserve">die Stäbe müſſen ſo geſtellt werden, daß das be-<lb/>zeichnete Ende D, Fig. </s>
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6933 <s xml:id="echoid-s3644" xml:space="preserve">101. </s>
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6934 <s xml:id="echoid-s3645" xml:space="preserve">dem unbezeichneten Ende B <lb/>gegenüber liege. </s>
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6935 <s xml:id="echoid-s3646" xml:space="preserve">Nunmehr ſtelle man die zween einander <lb/>anziehenden Pole G und I zweener Magnete mitten auf <lb/>einen der zu beſtreichenden Stäbe, und hebe die andern <lb/>Enden ſo weit in die Höhe, daß ſie mit dem liegenden <lb/>Stabe einen ſtumpfen Winkel von 100 — 120 Graden <lb/>machen; </s>
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6936 <s xml:id="echoid-s3647" xml:space="preserve">die Enden G und I müſſen 2 — 3 Zehntheil <lb/>Zoll von einander entfernt bleiben. </s>
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6937 <s xml:id="echoid-s3648" xml:space="preserve">In dieſer Stellung <lb/>halte man die Stäbe, bewege ſie langſam über den Stab <lb/>A B von einem Ende zum andern, und gehe ſo etwa 15 mal
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6938 <pb o="245" file="0265" n="265" rhead="über den Magnetiſmus."/>
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6939 über den Stab. </s>
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6940 <s xml:id="echoid-s3649" xml:space="preserve">Hierauf verwechſele man die Pole der <lb/>Stäbe <anchor type="note" xlink:href="" symbol="*)"/>, und wiederhole eben daſſelbe Verfahren, zu-
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6941 erſt an dem Stabe C D, und dann an den entgegengeſeß-<lb/>ten Seiten beyder Stäbe. </s>
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6942 <s xml:id="echoid-s3650" xml:space="preserve">Die mitgetheilte Kraft kann <lb/>noch mehr verſtärkt werden, wenn man die verſchiedenen <lb/>Seit@@ der Stäbe mit Sätzen von Magnetſtäben reibet, <lb/>die, wie in Fig. </s>
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6943 <s xml:id="echoid-s3651" xml:space="preserve">102 geſtellet ſind.</s>
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6944 <s xml:id="echoid-s3652" xml:space="preserve"/>
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6945 </p>
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6946 <p>
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6947 <s xml:id="echoid-s3653" xml:space="preserve">Allem Anſehen nach muß man, um den Stahl mag-<lb/>netiſch zu machen, ſeine Zwiſchenräüme in eine ſolche Ord-<lb/>nung bringen, daß ſie an einander liegende parallele Röh-<lb/>ren ausmachen, welche die magnetiſche Materie aufneh-<lb/>men und ihre Bewegung fortpflanzen können, ſo daß der <lb/>magnetiſche Strom leicht eingehen und mit der größten <lb/>Gewalt durch dieſelben circuliren kann. </s>
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6948 <s xml:id="echoid-s3654" xml:space="preserve">Es iſt daher <lb/>nothwendig, in der Wahl des Stahls, welcher beſtrichen <lb/>werden ſoll, ſo ſorgfältig, als möglich, zu ſeyn. </s>
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6949 <s xml:id="echoid-s3655" xml:space="preserve">Das <lb/>Korn deſſelben muß fein, gleichförmig und ohne Knoten <lb/>ſeyn, damit es der Materie von einem Ende bis zum an-<lb/>dern eine Anzahl gleicher und ununterbrochener Canäle <lb/>darbiete. </s>
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6950 <s xml:id="echoid-s3656" xml:space="preserve">Dies iſt noch weit nöthiger bey der Wahl des <lb/>Stahls zu Magnetnadeln für die Seecompaſſe; </s>
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6951 <s xml:id="echoid-s3657" xml:space="preserve">denn, <lb/>wenn der Stahl unrein iſt, oder nicht auf die gehörige <lb/>Art beſtrichen wird, ſo kann die Nadel mehrere Pole be-<lb/>kommen, welche der Wirkung der Hauptnadel nach Be-<lb/>ſchaffenheit ihrer Stärke und Lage mehr oder weniger hin-<lb/>derlich fallen.</s>
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6952 <s xml:id="echoid-s3658" xml:space="preserve"/>
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6953 </p>
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6954 <p>
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6955 <s xml:id="echoid-s3659" xml:space="preserve">Der Stahl muß auch gut gelöſcht und gehärtet ſeyn, <lb/>damit die Zwiſchenräume die Stellung, die ſie erhalten <lb/>haben, eine lange Zeit beybehalten, und den Veränderun-<lb/>gen der Richtung, welchen Eiſen und weicher Stahl <lb/>unterworfen ſind, beſſer widerſtehen. </s>
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6956 <s xml:id="echoid-s3660" xml:space="preserve">Der Unterſchied <lb/>
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6957 <anchor type="note" xlink:label="note-0265-01a" xlink:href="note-0265-01"/>
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6958 <pb o="246" file="0266" n="266" rhead="Verſuch"/>
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6959 in der Güte des Stahls iſt ſehr groß, wie man leicht <lb/>erfahren kann, wenn man zwey Stücken Stahl von <lb/>gleicher Größe, aber von verſchiedener Art, auf einerley <lb/>Weiſe und mit einerley Stäben beſtreicht.</s>
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6960 <s xml:id="echoid-s3661" xml:space="preserve"/>
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6961 </p>
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6962 <div xml:id="echoid-div286" type="float" level="2" n="1">
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6963 <note symbol="*)" position="foot" xlink:label="note-0265-01" xlink:href="note-0265-01a" xml:space="preserve"> d. i. das bezeichnete Ende des einen muß allezeit den@ <lb/>unbezeichneten Ende des andern gegenüber liegen.</note>
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6964 </div>
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6965 <p>
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6966 <s xml:id="echoid-s3662" xml:space="preserve">Gehärteter Stahl nimmt eine dauerhaftere magne-<lb/>tiſche Kraft an, als weicher Stahl, obgleich beyde allem <lb/>Anſehen nach in nichts weiter, als in der Anordnung der <lb/>Theile unterſchieden ſind; </s>
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6967 <s xml:id="echoid-s3663" xml:space="preserve">vielleicht enthält der weiche <lb/>Stahl Phlogiſton in ſeinen weitſten Zwiſchenräumen, <lb/>und der gehärtete nur in den engſten. </s>
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6968 <s xml:id="echoid-s3664" xml:space="preserve">Eiſen und <lb/>Stahl haben ſehr wenig Luft in ihren Zwiſchenräu-<lb/>men; </s>
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6969 <s xml:id="echoid-s3665" xml:space="preserve">wenn ſie aus den Eiſenerzen ausgeſchmolzen <lb/>werden, ſind ſiel einem ſehr hohen Grade der Hitze aus-<lb/>geſetzt, und die meiſten Veränderungen, denen ſie nach-<lb/>her unterworfen werden, wiederfahren ihnen im Zu-<lb/>ſtande der Glühhitze. </s>
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6970 <s xml:id="echoid-s3666" xml:space="preserve">Federharter Stahl behält nicht <lb/>ſoviel magnetiſche Kraft, als harter, weicher Stahl <lb/>noch weniger und Eiſen faſt gar keine. </s>
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6971 <s xml:id="echoid-s3667" xml:space="preserve">Aus einigen <lb/>Verſuchen des Muſſchenbroek erhellet, daß Eiſen <lb/>mit einer Säure verbunden nicht magnetiſch wird; <lb/></s>
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6972 <s xml:id="echoid-s3668" xml:space="preserve">trennt man aber die Säure davon, und ſtellt das <lb/>Phlogiſton wieder her, ſo wird es wieder ſo magne-<lb/>tiſch, als jemals.</s>
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6973 <s xml:id="echoid-s3669" xml:space="preserve"/>
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6974 </p>
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6975 <p>
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6976 <s xml:id="echoid-s3670" xml:space="preserve">Auch. </s>
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6977 <s xml:id="echoid-s3671" xml:space="preserve">Größe und Geſtalt des Magnets machen <lb/>einen Unterſchied in ſeiner Stärke; </s>
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6978 <s xml:id="echoid-s3672" xml:space="preserve">daher müſſen die <lb/>Stäbe, die man beſtreichen will, weder zu lang noch <lb/>zu kurz in Proportion mit ihrer Dicke ſeyn. </s>
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6979 <s xml:id="echoid-s3673" xml:space="preserve">Sind <lb/>ſie zu lang, ſo wird der Umlauf der magnetiſchen <lb/>Materie, welche aus dem einen Pole hervorkömmt <lb/>und rund um den Magnet in den andern Pol über-<lb/>geht, verhindert, und ihre Geſchwindigkeit geſchwächt <lb/>werden. </s>
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6980 <s xml:id="echoid-s3674" xml:space="preserve">Sind ſie zu kurz, ſo wird die Materie, wel-<lb/>che aus dem einen Pole ausſtrömet, von den übrigen <lb/>wirkenden Theilen des Magnets zurückgetrieben, und zu
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6981 <pb o="247" file="0267" n="267" rhead="über den Magnetiſmus."/>
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6982 weit von dem Pole, in welchen ſie gehen ſoll, abge-<lb/>lenkt, und es wird dadurch der fortgeſetzte Umlauf der <lb/>magnetiſchen Materie unterbrochen. </s>
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6983 <s xml:id="echoid-s3675" xml:space="preserve">Sind ſie zu dünn, <lb/>ſo iſt die Anzahl der Zwiſchenräume zu klein, um einen <lb/>Strom aufzunehmen, der ſtark genug wäre, den Hinder-<lb/>niſſen im äußern Raume zu widerſtehen; </s>
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6984 <s xml:id="echoid-s3676" xml:space="preserve">ſind ſie endlich <lb/>zu dick, ſo wird die gerade und regelmäßige Richtung <lb/>der Canäle durch die Schwierigkeiten gehindert, welche <lb/>bey der Anordnung der innern Theile ſtatt finden, da die <lb/>magnetiſche Materie nicht Kraſt genug hat, den Stahl <lb/>bis auf eine beträchtliche Tiefe zu durchdringen; </s>
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6985 <s xml:id="echoid-s3677" xml:space="preserve">es wird <lb/>alſo die Circulation der Materie gehindert.</s>
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6986 <s xml:id="echoid-s3678" xml:space="preserve"/>
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6987 </p>
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6988 <p>
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6989 <s xml:id="echoid-s3679" xml:space="preserve">Alle Stücken müſſen wohl poliret ſeyn; </s>
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6990 <s xml:id="echoid-s3680" xml:space="preserve">es iſt von <lb/>der äußerſten Wichtigkeit, die Enden glatt und gerade <lb/>zu machen, damit ſie die Enden des weichen Eiſens, wel-<lb/>ches die Circulation aufhalten ſoll, in ſo viel Punkten, <lb/>als möglich, berühren. </s>
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6991 <s xml:id="echoid-s3681" xml:space="preserve">Alle Ungleichheiten an den Sei-<lb/>ten, beſonders in der Nähe der Pole, müſſen ſorgfältig <lb/>vermieden werden, weil ſie Unregelmäßigkeit in die Cir-<lb/>culation bringen, und daher die Geſchwindigkeit derſel-<lb/>ben vermindern, welche eine von den vornehmſten Quel-<lb/>len der magnetiſchen Kraft iſt.</s>
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6992 <s xml:id="echoid-s3682" xml:space="preserve"/>
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6993 </p>
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6994 <p>
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6995 <s xml:id="echoid-s3683" xml:space="preserve">Indem man die Stäbe beſtreicht, müſſen die En-<lb/>den des weichen Eiſens in beſtändiger Berührung mit <lb/>ihnen erhalten werden, denn eine Trennung auf einen <lb/>einzigen Augenblick iſt hinreichend, die Wirkung der <lb/>ganzen Operation aufzuheben, weil ſich die Materie au-<lb/>genblicklich in die Luft zerſtreuet.</s>
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6996 <s xml:id="echoid-s3684" xml:space="preserve"/>
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6997 </p>
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6998 <p>
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6999 <s xml:id="echoid-s3685" xml:space="preserve">Der Operator muß bey dem erſten Stabe nicht län-<lb/>ger verweilen, als nöthig iſt, ſeine Zwiſchenräume zu öff-<lb/>nen, und denſelben die magnetiſche Anordnung zu geben; <lb/></s>
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7000 <s xml:id="echoid-s3686" xml:space="preserve">er muß alsdann ſogleich zu dem andern Stabe übergehen, <lb/>um der aus dem erſten ausgehenden Materie eine Oef-<lb/>nung zu verſchaffen.</s>
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7001 <s xml:id="echoid-s3687" xml:space="preserve"/>
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7002 </p>
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7003 <pb o="248" file="0268" n="268" rhead="Verſuch"/>
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7004 <p>
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7005 <s xml:id="echoid-s3688" xml:space="preserve">Es iſt am vortheilhafteſten, wenn man den Stob, <lb/>dem man verlaſſen hat, während der Zeit, da die beſtrei-<lb/>chenden Magnete auf dem andern liegen, umkehret; </s>
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7006 <s xml:id="echoid-s3689" xml:space="preserve">auf <lb/>dieſe Art, wird der zu erregende Strom die Canäle des <lb/>erſten Stabs in die gehörige Lage bringen, und ſo die <lb/>Operation wirkſamer machen; </s>
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7007 <s xml:id="echoid-s3690" xml:space="preserve">überdies hat man, wenn <lb/>man nur einen Stab auf einmal umkehret, niemals nö-<lb/>thig, die beſtreichenden Magnete während der Operation <lb/>ganz wegzunehmen, welcher Umſtand ſehr viel zur Stärke <lb/>des Magnets beyträgt.</s>
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7008 <s xml:id="echoid-s3691" xml:space="preserve"/>
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7009 </p>
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7010 <p>
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7011 <s xml:id="echoid-s3692" xml:space="preserve">Die beſtreichenden Stäbe dürfen nie anderswo ge-<lb/>trennt werden, als am Aequator des Magnets; </s>
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7012 <s xml:id="echoid-s3693" xml:space="preserve">und ihre <lb/>Bewegung über die andern Theile muß langſam und te-<lb/>gelmäßig ſeyn.</s>
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7013 <s xml:id="echoid-s3694" xml:space="preserve"/>
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7014 </p>
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7015 <p>
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7016 <s xml:id="echoid-s3695" xml:space="preserve">Die magnetiſche Kraft beſtrichener Nadeln wird ver-<lb/>ſtärkt, wenn man ſie einige Zeit in Leinöl leget.</s>
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7017 <s xml:id="echoid-s3696" xml:space="preserve"/>
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7018 </p>
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7019 <p>
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7020 <s xml:id="echoid-s3697" xml:space="preserve">Es kann zur Wirkſamkeit der Operation viel bey-<lb/>tragen, wenn die Stäbe A und B, Fig. </s>
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7021 <s xml:id="echoid-s3698" xml:space="preserve">100, in die Rich-<lb/>tung des magnetiſchen Meridians geſtellt, und gegen den <lb/>Horizont unter einem Winkel geneigt werden, welcher der <lb/>Inclination der Magnetnadel gleich iſt.</s>
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7022 <s xml:id="echoid-s3699" xml:space="preserve"/>
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7023 </p>
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7024 <p>
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7025 <s xml:id="echoid-s3700" xml:space="preserve">Die dem Magnete auf dieſe Art mitgetheilte Kraft <lb/>wird geſchwächt, wenn er unter Eiſen liegt, oder roſtet, <lb/>ingleichen durchs Feuer, indem alle dieſe Umſtände die <lb/>Richtung des magnetiſchen Stroms ändern oder ver-<lb/>wirren.</s>
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7026 <s xml:id="echoid-s3701" xml:space="preserve"/>
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7027 </p>
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7028 <p>
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7029 <s xml:id="echoid-s3702" xml:space="preserve">Man ſtelle eine kleine Magnetnadel auf die Spitze <lb/>eines kleinen Stativs, und bringe ſie zwiſchen zween mag-<lb/>netiſche Stäbe, ſo daß das nördliche Ende des Stabs <lb/>dem ſüdlichen Ende der Nadel entgegenſteht; </s>
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7030 <s xml:id="echoid-s3703" xml:space="preserve">ſo wird die <lb/>kleine Nadel, ohne irgend eine in die Augen fallende Ur-<lb/>ſache in eine heftige Schwungbewegung gerathen, und gleich-<lb/>ſam belebt ſcheinen, bis ſie mit magnetiſcher Kraft geſät-<lb/>tiget ift; </s>
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7031 <s xml:id="echoid-s3704" xml:space="preserve">alsdann wird ſie in Ruhe bleiben. </s>
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7032 <s xml:id="echoid-s3705" xml:space="preserve">Dieſe <lb/>Schwungbewegung entſteht vermuthlich aus den unregel-<lb/>mäßigen Eindrücken, welche ſie von der magnetiſchen Ma-
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7033 <pb o="249" file="0269" n="269" rhead="über den Magnetiſmus."/>
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7034 terie erhält, und aus der Schwierigkeit, welche die Ma-<lb/>terie findet, in die Nadel einzudringen.</s>
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7035 <s xml:id="echoid-s3706" xml:space="preserve"/>
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7036 </p>
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7037 <p>
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7038 <s xml:id="echoid-s3707" xml:space="preserve">Alle Urſachen, welche fähig ſind, die magnetiſche <lb/>Materie in eine ſtrömende Bewegung zu ſetzen, bringen <lb/>auch in den Körpern, welche magnetiſche Kraft anzuneh-<lb/>men fähig ſind, einen Magnetiſmus hervor.</s>
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7039 <s xml:id="echoid-s3708" xml:space="preserve"/>
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7040 </p>
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7041 <p>
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7042 <s xml:id="echoid-s3709" xml:space="preserve">Wenn man eiſerne Stäbe heiß macht, und dann <lb/>gleichförmig abkühlet, und zwar in verſchiedenen Richtun-<lb/>gen, z. </s>
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7043 <s xml:id="echoid-s3710" xml:space="preserve">B. </s>
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7044 <s xml:id="echoid-s3711" xml:space="preserve">parallel, perpendiculär oder ſchief gegen die <lb/>Richtung der inclinirenden Nadel, ſo erhalten ſie eine Po-<lb/>larität nach ihrer Lage; </s>
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7045 <s xml:id="echoid-s3712" xml:space="preserve">ſie iſt am ſtärkſten, wenn die <lb/>Stäbe mit der Inclination der Magnetnadel parallel ge-<lb/>weſen ſind, und wird nach und nach immer geringer, bis <lb/>auf den Fall, da die Stäbe ſenkrecht auf dieſe Richtung <lb/>geſtanden haben, in welchem Falle ſie gar keine beſtimmte <lb/>Polarität haben. </s>
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7046 <s xml:id="echoid-s3713" xml:space="preserve">Wenn aber beym Abkühlen eines eiſer-<lb/>nen Stabs in Waſſer das untere Ende beträchtlich heißer, <lb/>als das obere, iſt, und das obere zuerſt abkühlet, ſo wird <lb/>dieſes bisweilen der Nordpol, obgleich nicht allezeit. </s>
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7047 <s xml:id="echoid-s3714" xml:space="preserve">Wenn <lb/>Eiſen oder Stahl eine gewaltſame Reibung an einer ein-<lb/>zelnen Stelle erleiden, ſo erhalten ſie eine Polarität: </s>
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7048 <s xml:id="echoid-s3715" xml:space="preserve">iſt <lb/>das Eiſen weich, ſo dauret der Magnetiſmus nicht viel <lb/>länger, als die Wärme anhält. </s>
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7049 <s xml:id="echoid-s3716" xml:space="preserve">Der Blitz iſt die ſtärkſte <lb/>bisher bekannte Kraft, welche einen magnetiſchen Strom <lb/>hervorzubringen vermag; </s>
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7050 <s xml:id="echoid-s3717" xml:space="preserve">er macht gehärteten Stahl in <lb/>einem Augenblicke ſtark magnetiſch, und pflegt bisweilen <lb/>die Pole einer Magnetnadel umzukehren.</s>
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7051 <s xml:id="echoid-s3718" xml:space="preserve"/>
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7052 </p>
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7053 <p>
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7054 <s xml:id="echoid-s3719" xml:space="preserve">Um einen magnetiſchen Stab mit mehreren Polen <lb/>zu machen, ſtelle man Magnete an diejenigen Stellen, an <lb/>welche die Pole kommen ſollen. </s>
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7055 <s xml:id="echoid-s3720" xml:space="preserve">Wenn an eine Stelle <lb/>ein Südpol kommen ſoll, ſo müſſen Nordpole an die bey-<lb/>den nächſten Stellen geſetzt werden; </s>
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7056 <s xml:id="echoid-s3721" xml:space="preserve">nunmehr betrachte <lb/>man jedes Stück zwiſchen den Unterlagen als einen be-<lb/>ſondern Magnet, und beſtreiche es dem gemäß.</s>
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7057 <s xml:id="echoid-s3722" xml:space="preserve"/>
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7058 </p>
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7059 <pb o="250" file="0270" n="270" rhead="Verſuch"/>
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7060 </div>
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7061 <div xml:id="echoid-div288" type="section" level="1" n="276">
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7062 <head xml:id="echoid-head303" xml:space="preserve">Es giebt in jedem Magnete gewiſſe Stellen, in <lb/>welchen ſeine Kraft gleichſam concentrirt zu <lb/>ſeyn ſcheinet.</head>
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7063 <p>
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7064 <s xml:id="echoid-s3723" xml:space="preserve">Man ſtelle einen Magnet auf ein meſſingenes Sta-<lb/>tiv, und verſuche, wie viel eiſerne Kugeln er an verſchie-<lb/>denen Stellen trägt; </s>
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7065 <s xml:id="echoid-s3724" xml:space="preserve">ſo wird man finden, daß er gegen <lb/>die Enden zu die meiſten trägt, woraus erhellet, daß <lb/>ſich daſelbſt die magnetiſche Kraft mit der größten Stärke <lb/>zeige.</s>
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7066 <s xml:id="echoid-s3725" xml:space="preserve"/>
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7067 </p>
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7068 <p>
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7069 <s xml:id="echoid-s3726" xml:space="preserve">Man lege ein kleines meſſingenes Gewicht auf das <lb/>nördliche Ende der Inclinations – Nadel, und bringe den <lb/>Südpol eines Magnets gegen das Ende des getheilten <lb/>Bogens, ſo wird derſelbe das Ende der Nadel bis auf <lb/>einen gewiſſen Grad zurückſtoßen; </s>
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7070 <s xml:id="echoid-s3727" xml:space="preserve">nunmehr bewege man <lb/>den Magnet nach und nach vorwärts, ſo wird die Nadel <lb/>nach und nach herabfallen, bis ſie auf Null kömmt. </s>
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7071 <s xml:id="echoid-s3728" xml:space="preserve">Be-<lb/>wegt man den Magnet weiter fort, ſo wird der Zeiger ge-<lb/>gen ihn gezogen.</s>
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7072 <s xml:id="echoid-s3729" xml:space="preserve"/>
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7073 </p>
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7074 </div>
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7075 <div xml:id="echoid-div289" type="section" level="1" n="277">
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7076 <head xml:id="echoid-head304" xml:space="preserve">Die Pole eines Magnets zu finden.</head>
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7077 <p>
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7078 <s xml:id="echoid-s3730" xml:space="preserve">Man lege einen Magnet unter eine Glastafel, ſiebe <lb/>etwas Stahlfeile auf das Glas, und ſchlage ſanft mit <lb/>einem Schlüſſel darauf, um das Glas in eine ſchwingende <lb/>Bewegung zu ſetzen. </s>
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7079 <s xml:id="echoid-s3731" xml:space="preserve">Dadurch wird ſich die Stahlfeile <lb/>losmachen und ſich bald auf eine ſehr angenehme Art ord-<lb/>nen; </s>
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7080 <s xml:id="echoid-s3732" xml:space="preserve">die Stellen des Magnets, von welchen die krum-<lb/>men Linien auszugehen, und über welchen die Stahltheil-<lb/>chen faſt aufgerichtet zu ſtehen ſcheinen, ſind die Pole.</s>
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7081 <s xml:id="echoid-s3733" xml:space="preserve"/>
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7082 </p>
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7083 <p>
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7084 <s xml:id="echoid-s3734" xml:space="preserve">In dieſem ſowohl, als in vielen andern magneti-<lb/>ſchen Verſuchen äußert ſich augenſcheinlich eine magneti-<lb/>ſche Kraft, die die Eiſentheilchen aus ihrer natürlichen <lb/>Lage in eine andere bringt, und in derſelben mit beträcht-<lb/>licher Gewalt erhält.</s>
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7085 <s xml:id="echoid-s3735" xml:space="preserve"/>
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7086 </p>
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7087 <p>
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7088 <s xml:id="echoid-s3736" xml:space="preserve">Noch genauer kann man die Pole eines Magnets <lb/>mit einer kleinen Inclinationsnadel beſtimmen. </s>
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7089 <s xml:id="echoid-s3737" xml:space="preserve">Man
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7090 <pb o="251" file="0271" n="271" rhead="über den Magnetiſmus."/>
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7091 ſetze dieſelbe auf einen Magnet, und bewege ſie vor- und <lb/>rückwärts, bis die Nadel ſenkrecht gegen den Magnet <lb/>ſteht, alsdann wird ſie gerade auf den einen Pol zeigen. <lb/></s>
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7092 <s xml:id="echoid-s3738" xml:space="preserve">Wenn ſie ſo zwiſchen dem Nord- und Südpole ſteht, daß <lb/>beyder gegenſeitige Wirkungen einander das Gleichgewicht <lb/>halten, ſo wird der Mittelpunkt der Nadel gerade über <lb/>dem Aequator des Magnets ſtehen, und die Nadel wird <lb/>mit der Axe genau parallel liegen. </s>
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7093 <s xml:id="echoid-s3739" xml:space="preserve">Wenu man ſie von <lb/>hieraus gegen den einen Pol führet, ſo wird ſie nach Ver-<lb/>hältniß ihres Abſtandes von den Polen verſchiedene ſchiefe <lb/>Lagen annehmen.</s>
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7094 <s xml:id="echoid-s3740" xml:space="preserve"/>
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7095 </p>
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7096 <p>
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7097 <s xml:id="echoid-s3741" xml:space="preserve">Man halte eine gemeine kleine Nähnadel an einem <lb/>durchgezognen Faden einige Secunden lang nahe an einen <lb/>Magnet, und bringe ſie dann nach und nach gegen die <lb/>Mitte eines magnetiſchen Stabs, ſo wird die Kraft des <lb/>Magnets ihrer Schwere ſo ſtark entgegenwirken, daß ſie <lb/>in der Luft ſchwebend bleiben, und eine dem Magnetſtabe <lb/>beynahe parallele Richtung annehmen wird.</s>
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7098 <s xml:id="echoid-s3742" xml:space="preserve"/>
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7099 </p>
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7100 <p>
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7101 <s xml:id="echoid-s3743" xml:space="preserve">Da es keine magnetiſche Anziehung ohne Polarität <lb/>geben kann, ſo wäre es widerſprechend, zu behaupten, daß <lb/>ein Magnet eine ſtarke anziehende Kraft haben könne, <lb/>ohne zugleich eine ſtarke Polarität zu beſitzen.</s>
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diff changeset
7102 <s xml:id="echoid-s3744" xml:space="preserve"/>
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diff changeset
7103 </p>
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diff changeset
7104 </div>
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diff changeset
7105 <div xml:id="echoid-div290" type="section" level="1" n="278">
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7106 <head xml:id="echoid-head305" xml:space="preserve">Man hänge einen eiſernen Stab ingenauem Gleich-<lb/>gewichte an einem Punkte ſo auf, daß er ſich <lb/>in einer Horizontalebne frey drehen könne, <lb/>und theilte dieſem Stabe die magnetiſche Kraft <lb/>mit, ſo wird ſich das eine Ende deſſelben alle-<lb/>zeit gegen Norden richten.</head>
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diff changeset
7107 <p>
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7108 <s xml:id="echoid-s3745" xml:space="preserve">Stellt man eine unbeſtrichene Nadel auf eine Spitze, <lb/>ſo wird ſie in jeder bsliebigen Richtung ſtehen bleiben; <lb/></s>
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7109 <s xml:id="echoid-s3746" xml:space="preserve">theilt man ihr aber die magnetiſche Kraft mit, ſo beſtimmt <lb/>ſie ſich zu einer gewiſſen Richtung, und kehrt allezeit das <lb/>eine Ende gegen Norden, das andere gegen Süden.</s>
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diff changeset
7110 <s xml:id="echoid-s3747" xml:space="preserve"/>
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diff changeset
7111 </p>
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diff changeset
7112 <pb o="252" file="0272" n="272" rhead="Verſuch"/>
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diff changeset
7113 <p>
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7114 <s xml:id="echoid-s3748" xml:space="preserve">Es iſt nicht unwahrſcheinlich, daß man in Zukunft <lb/>an den meiſten Körpern eine Polarität entdecken werde, <lb/>vermöge welcher ſie Richtungen annehmen, die mit den <lb/>verſchiedenen Affinitäten der Elemente, aus welchen ſie <lb/>zuſammengeſetzt ſind, im Verhältniſſe ſtehen.</s>
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diff changeset
7115 <s xml:id="echoid-s3749" xml:space="preserve"/>
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diff changeset
7116 </p>
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diff changeset
7117 <p>
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7118 <s xml:id="echoid-s3750" xml:space="preserve">Dieſe Richtung der mit dem Magnet beſtrichenen <lb/>Nadeln iſt von der größten Wichtigkeit für die menſchliche <lb/>Geſellſchaft. </s>
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7119 <s xml:id="echoid-s3751" xml:space="preserve">Sie ſetzt den Schiffer in Stand, über das <lb/>Meer zu ſeegeln, und bringt durch dieſes Mittel die Kün-<lb/>ſte, Manufacturen und Kenntniſſe entſernter Länder mit <lb/>einander in Verbindung. </s>
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7120 <s xml:id="echoid-s3752" xml:space="preserve">Der Feldmeſſer, der Mark-<lb/>ſcheider und der Aſtronom ziehen aus dieſer wunderbaren <lb/>Eigenſchaft mancherley Vortheile.</s>
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diff changeset
7121 <s xml:id="echoid-s3753" xml:space="preserve"/>
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diff changeset
7122 </p>
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diff changeset
7123 <p>
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7124 <s xml:id="echoid-s3754" xml:space="preserve">Der Seecompaß beſteht aus drey Theilen, der Büch-<lb/>ſe, der Scheibe und der Nadel.</s>
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diff changeset
7125 <s xml:id="echoid-s3755" xml:space="preserve"/>
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7126 </p>
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7127 <p>
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7128 <s xml:id="echoid-s3756" xml:space="preserve">Die Scheibe iſt ein Kreis von ſteifem Papier, wel-<lb/>cher den Horizont vorſtellet, mit den darauf verzeichneten <lb/>Weltgegenden; </s>
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7129 <s xml:id="echoid-s3757" xml:space="preserve">die Magnetnadel wird an der untern Seite <lb/>dieſer Scheibe befeſtiget; </s>
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7130 <s xml:id="echoid-s3758" xml:space="preserve">der Mittelpunkt der Nadel iſt <lb/>durchbohrt, und in das Loch iſt eine Haube mit einem ke-<lb/>gelförmigen Achate befeſtiget; </s>
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7131 <s xml:id="echoid-s3759" xml:space="preserve">dieſe Haube ruht auf einer <lb/>an den Boden der Büchſe befeſtigten Nadel; </s>
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7132 <s xml:id="echoid-s3760" xml:space="preserve">die Büchſe <lb/>hat einen Glasdeckel, und hängt vermittelſt zweener Stifte <lb/>in einem Kaſten.</s>
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7133 <s xml:id="echoid-s3761" xml:space="preserve"/>
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7134 </p>
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diff changeset
7135 <p>
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7136 <s xml:id="echoid-s3762" xml:space="preserve">Es iſt nicht gewiß ausgemacht, wer der erſte Erfin-<lb/>der des Seecompaſſes geweſen ſey; </s>
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7137 <s xml:id="echoid-s3763" xml:space="preserve">einige ſchreiben dieſe <lb/>Ehre dem Flavio Gioja von Amalfi in Campanien zu, <lb/>welcher im Anfange des 14ten Jahrhunderts lebte, an-<lb/>dere leiten die Erfindung aus dem Orient her, noch andere <lb/>glauben, ſie ſey ſchon früher in Europa bekannt geweſen.</s>
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7138 <s xml:id="echoid-s3764" xml:space="preserve"/>
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7139 </p>
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7140 <p>
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7141 <s xml:id="echoid-s3765" xml:space="preserve">Die entgegengeſetzten Pole zweener Magnete ziehen <lb/>einander an. </s>
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7142 <s xml:id="echoid-s3766" xml:space="preserve">Die Nordpole zweener Magnete ſtoßen ein-<lb/>ander ab, und eben ſo auch die Südpole. </s>
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7143 <s xml:id="echoid-s3767" xml:space="preserve">Dieſe Phäno <lb/>mene laſſen ſich ſehr leicht durch eine Menge angenehmer <lb/>Verſuche erläutern.</s>
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7144 <s xml:id="echoid-s3768" xml:space="preserve"/>
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7145 </p>
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7146 <pb o="253" file="0273" n="273" rhead="über den Magnetiſmus."/>
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7147 <p>
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7148 <s xml:id="echoid-s3769" xml:space="preserve">Man hänge eine beſtrichene Nadel an einem Punkte <lb/>auf, und halte den Südpol eines Magnets gegen ihren <lb/>Nordpol, ſo wird ſie vom Magnet angezogen werden, und <lb/>gegen ihn zu fliegen; </s>
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7149 <s xml:id="echoid-s3770" xml:space="preserve">man halte den andern Pol des Mag-<lb/>nets dagegen, ſo wird die Nadel vor demſelben fliehen.</s>
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7150 <s xml:id="echoid-s3771" xml:space="preserve"/>
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7151 </p>
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7152 <p>
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7153 <s xml:id="echoid-s3772" xml:space="preserve">Man befeſtige zwo Nadeln horizontal in zwo Stü-<lb/>cken Kork, und ſetze ſie auf Waſſer; </s>
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7154 <s xml:id="echoid-s3773" xml:space="preserve">kehren ſich nun die <lb/>gleichnahmigen Pole gegen einander, ſo werden die Na-<lb/>deln einander zurückſtoßen; </s>
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7155 <s xml:id="echoid-s3774" xml:space="preserve">kehrt man aber die ungleich-<lb/>nahmigen Pole gegen einander, ſo werden ſie ſich anzie-<lb/>hen und zuſammen kommen.</s>
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7156 <s xml:id="echoid-s3775" xml:space="preserve"/>
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7157 </p>
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7158 <p>
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7159 <s xml:id="echoid-s3776" xml:space="preserve">Man ſtecke die beyden Enden zweener Magnete in <lb/>Stahlfeile, welche ſich daran hängen und in Form von <lb/>Klumpen oder Fäden herabhangen wird. </s>
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7160 <s xml:id="echoid-s3777" xml:space="preserve">Man bringe <lb/>nun die beyden Nordpole zuſammen, ſo wird die Stahl-<lb/>feile des einen der Stahlfeile des andern ausweichen. <lb/></s>
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7161 <s xml:id="echoid-s3778" xml:space="preserve">Bringt man aber den Nordpol des einen und den Süd-<lb/>pol des andern zuſammen, ſo wird ſich die Stahlfeile ver-<lb/>binden, und kleine Cirkelbogen von einem Stabe zum <lb/>andern bilden.</s>
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7162 <s xml:id="echoid-s3779" xml:space="preserve"/>
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7163 </p>
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7164 <p>
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7165 <s xml:id="echoid-s3780" xml:space="preserve">Man lege einen cylindriſchen Magnet auf eine glatte <lb/>horizontale Fläche, und bringe einen ſtählernen Magnet, <lb/>der wie ein Fiſch geſtaltet iſt, nahe an denſelben in einer <lb/>parallelen Lage. </s>
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7166 <s xml:id="echoid-s3781" xml:space="preserve">Kehrt man nun den Kopf des Fiſches <lb/>gegen das eine Ende des Cylinders, ſo wird der letztere <lb/>von dem Fiſche hinweg rollen, kehrt man aber den <lb/>Schwanz des Fiſches gegen daſſelbe, ſo rollt der Cylinder <lb/>auf den Fiſch zu, und folgt ihm nach.</s>
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7167 <s xml:id="echoid-s3782" xml:space="preserve"/>
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7168 </p>
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7169 <p>
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7170 <s xml:id="echoid-s3783" xml:space="preserve">Auf dieſe beſondere Eigenſchaft des Magnets grü<unsure/>n-<lb/>den ſich die Verſuche, welche Herr Comus vor einigen <lb/>Jahren in London gezeigt hat, und von denen man eine <lb/>große Menge in Hoopers Rational Recreation beſchrie-<lb/>ben findet. </s>
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7171 <s xml:id="echoid-s3784" xml:space="preserve">Um die Beſchaffenheit dieſer Verſuche zu er-<lb/>läutern, ſchließe man einen Magnet in ein Stück Meſ-<lb/>ſing ein, welches die Geſtalt eines Herzes hat, lege das <lb/>Herz in ein Käſtgen, ſtelle einen Compaß über das
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7172 <pb o="254" file="0274" n="274" rhead="Verſuch"/>
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7173 Käſtgen ſo, daß der Nordpunkt gegen das Charnier des <lb/>Deckels zu gekehrt iſt, und beobachte die Stellung der Na-<lb/>del. </s>
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7174 <s xml:id="echoid-s3785" xml:space="preserve">Man nehme nunmehr das Herz heraus, lege es um-<lb/>gekehrt wieder hinein, und beobachte die Stellung der <lb/>Nadel von neuem; </s>
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7175 <s xml:id="echoid-s3786" xml:space="preserve">behält man nun dieſe Stellungen im <lb/>Gedächtniß, ſo kann man leicht wiſſen, wie das Herz lie-<lb/>ge, wenn es gleich im Verborgnen iſt hineingelegt worden.</s>
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7176 <s xml:id="echoid-s3787" xml:space="preserve"/>
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7177 </p>
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7178 </div>
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7179 <div xml:id="echoid-div291" type="section" level="1" n="279">
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7180 <head xml:id="echoid-head306" xml:space="preserve">Die magnetiſche Materie bewegt ſich inwendig in <lb/>einem Strome von einem Pole zum andern, <lb/>und geht dann in krummen Linien äußerlich <lb/>fort, bis ſie wieder an den Pol kömmt, in <lb/>welchen ſie zuerſt eingieng, und in welchen ſie <lb/>nunmehr von neuem eingeht.</head>
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7181 <p>
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7182 <s xml:id="echoid-s3788" xml:space="preserve">Man lege eine Glastafel über einen magnetiſchen <lb/>Stab, ſiebe Stahlfeile darauf, und ſchlage ſanft auf das <lb/>Glas, ſo werden ſich die Feilſpäne von ſelbſt in eine ſolche <lb/>Ordnung legen, welche den Lauf der magnetiſchen Mate-<lb/>rie mit großer Genauigkeit darſtellt. </s>
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7183 <s xml:id="echoid-s3789" xml:space="preserve">Auch die krummen <lb/>Linien, in welchen ſie zu dem Pole, in den ſie zuerſt ein-<lb/>gi@ng, wieder zurückkehret, werden durch die Lage der <lb/>Stahlfeile ſehr deutlich angezeiget. </s>
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7184 <s xml:id="echoid-s3790" xml:space="preserve">Die breitſten Curven <lb/>entſtehen an der einen Polarfläche und erſtrecken ſich bis <lb/>an die andere; </s>
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7185 <s xml:id="echoid-s3791" xml:space="preserve">ſie ſind deſto breiter, je näher ſie an der <lb/>Axe oder an der Mitte der Polarfläche entſ@ringen; </s>
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7186 <s xml:id="echoid-s3792" xml:space="preserve">die-<lb/>jenigen, welche aus den Seitenflächen des magnetiſchen <lb/>Stabes hervorgehen, liegen innerhalb jener, welche aus <lb/>den Polarflächen entſpringen, und werden immer enger, <lb/>je weiter ſie von den Enden abſtehen. </s>
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7187 <s xml:id="echoid-s3793" xml:space="preserve">Daß die magnetiſche <lb/>Materie zurückgehe, und auswendig die entgegengeſetzte <lb/>Richtung von derjenigen habe, in welcher ſie durch den <lb/>Magnet durchgeht, das beweiſen die Stellungen einer <lb/>kleinen Magnetnadel, wenn man dieſelbe an verſchiedenen <lb/>Stellen gegen den Magnetſtab hält. </s>
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7188 <s xml:id="echoid-s3794" xml:space="preserve">Man ſ. </s>
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7189 <s xml:id="echoid-s3795" xml:space="preserve">Fig. </s>
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7190 <s xml:id="echoid-s3796" xml:space="preserve">103.</s>
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7191 <s xml:id="echoid-s3797" xml:space="preserve"/>
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7192 </p>
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7193 <pb o="255" file="0275" n="275" rhead="über den Magnetiſmus."/>
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7194 <p>
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7195 <s xml:id="echoid-s3798" xml:space="preserve">Je größer der Abſtand beyder Pole des Magnets <lb/>iſt, deſto breiter ſind die Curven, welche dus den Polar-<lb/>flächen entſpringen.</s>
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7196 <s xml:id="echoid-s3799" xml:space="preserve"/>
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7197 </p>
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7198 </div>
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7199 <div xml:id="echoid-div292" type="section" level="1" n="280">
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7200 <head xml:id="echoid-head307" xml:space="preserve">Die unmittelbare Urſache, warum zwey oder meh-<lb/>rere magnetiſche Körper einander anziehen, <lb/>iſt der Durchgang eines und ebendeſſelben <lb/>magnetiſchen Stroms durch beyde.</head>
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7201 <p>
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7202 <s xml:id="echoid-s3800" xml:space="preserve">Man ſtelle zween Magnete in einiger Entfernung <lb/>von einander ſo, daß der Südpol des einen dem Nordpole <lb/>des andern entgegen gekehrt iſt, lege eine Glastafel dar-<lb/>über, beſtreue dieſelbe mit Stahlfeile, und ſchlage mit ei-<lb/>nem Schlüſſel ganz ſanft darauf, ſo werden ſich die Feil-<lb/>ſpäne nach der Richtung der magnetiſchen Kraft ordnen. <lb/></s>
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7203 <s xml:id="echoid-s3801" xml:space="preserve">Die Späne, welche zwiſchen den beyden Polarflächen lie-<lb/>gen, und der gemeinſchaftlichen Axe nahe ſind, werden <lb/>ſich in gerade Linien legen, welche von dem Nordpole des <lb/>einen bis zu dem Südpole des andern Magnets gehen: </s>
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7204 <s xml:id="echoid-s3802" xml:space="preserve"><lb/>die Zwiſchenräume beyder Magnete liegen jetzt in einerley <lb/>Richtung, ſo daß die Materie, welche durch A B, Fig. </s>
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7205 <s xml:id="echoid-s3803" xml:space="preserve"><lb/>104, geht, am Pole a die Zwiſchenräume zum Eingange <lb/>offen findet. </s>
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7206 <s xml:id="echoid-s3804" xml:space="preserve">Sie geht daher hinein, kömmt in b heraus <lb/>und kehrt gegen A zurück, um ihren Strom durch den <lb/>Magnet wieder anzufangen, und ſo bildet ſie eine Atmoſ-<lb/>phäre oder einen Wirbel, der auf allen Seiten durch die <lb/>elaſtiſche Kraft des andern zuſammengedrückt wird, und <lb/>alſo die Magnete gegen einander treibt. </s>
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7207 <s xml:id="echoid-s3805" xml:space="preserve">In verſchiede-<lb/>nen Entfernungen von der Axe beſchreiben die Feilſpäne <lb/>reguläre krumme Linien, welche von einem Pole zum an-<lb/>dern gehen, und vom Südpole aus bis in die Mitte di-<lb/>vergiren, dann aber wieder convergiren, bis ſie an den <lb/>Nordpol kommen. </s>
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7208 <s xml:id="echoid-s3806" xml:space="preserve">Wenn die entgegengeſetzten Pole <lb/>weit von einander abſtehen, ſo gehen einige Bogen von <lb/>einem Pole bis zum andern Pole eben deſſelben Magnets; </s>
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7209 <s xml:id="echoid-s3807" xml:space="preserve"><lb/>bringt man die Magnete näher zuſammen, ſo entſtehen
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7210 <pb o="256" file="0276" n="276" rhead="Verſuch"/>
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7211 weniger ſolche Bogen, es gehen deren mehrere von einem <lb/>Magnet zum andern, und der Strom der magnetiſchen <lb/>Materie ſcheint häufiger und concentrirter.</s>
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7212 <s xml:id="echoid-s3808" xml:space="preserve"/>
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7213 </p>
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7214 <p>
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7215 <s xml:id="echoid-s3809" xml:space="preserve">Wätzrend der Zeit, da ſich die Magnete in der an-<lb/>gezeigten Lage befinden, bringe man ein kleines unbeſtri-<lb/>chenes Stäbchen oder eine Nadel in den Strom der mag-<lb/>netiſchen Materie; </s>
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7216 <s xml:id="echoid-s3810" xml:space="preserve">ſo wird dieſer Strom durchgehen und <lb/>der Nadel eine Polarität nach ſeiner Richtung geben.</s>
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7217 <s xml:id="echoid-s3811" xml:space="preserve"/>
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7218 </p>
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7219 <p>
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7220 <s xml:id="echoid-s3812" xml:space="preserve">Aus eben dieſer Urſache wird ein großer Schlüſſel <lb/>oder ein anderes unbeſtrichenes Stück Eiſen, ſo lange es <lb/>ſich in dem Wirkungskreiſe eines magnetiſchen Pols befin-<lb/>det, ein kleineres Eiſen anziehen und tragen, hingegen <lb/>daſſelbe fallen laſſen, ſobald es aus dem magnetiſchen <lb/>Strome herauskömmt.</s>
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7221 <s xml:id="echoid-s3813" xml:space="preserve"/>
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7222 </p>
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7223 <p>
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7224 <s xml:id="echoid-s3814" xml:space="preserve">Eine Kugel von weichem Eiſen, welche mit einem <lb/>Magnet in Berührung iſt, wird eine zweyte Kugel, dieſe <lb/>eine dritte u. </s>
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7225 <s xml:id="echoid-s3815" xml:space="preserve">ſ. </s>
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7226 <s xml:id="echoid-s3816" xml:space="preserve">w. </s>
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7227 <s xml:id="echoid-s3817" xml:space="preserve">tragen, bis der magnetiſche Strom zu <lb/>ſchwach wird, um ein größeres Gewicht zu halten.</s>
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7228 <s xml:id="echoid-s3818" xml:space="preserve"/>
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7229 </p>
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7230 <p>
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7231 <s xml:id="echoid-s3819" xml:space="preserve">Man drehe einen kleinen Dreher mit einer eiſernen <lb/>Are, und ziehe ihn mit einem Magnet in die Höhe, ſo <lb/>wird er ſeine umdrehende Bewegung weit länger fortſetzen, <lb/>als wenn man ihn auf dem Tiſche hätte laufen laſſen; </s>
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7232 <s xml:id="echoid-s3820" xml:space="preserve">man <lb/>kann noch einen zweyten und dritten Dreher darunter an-<lb/>hängen, nach Verhältniß der Stärke des Magnets, und <lb/>ſie werden alle ihre umdrehende Bewegung fortſetzen.</s>
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7233 <s xml:id="echoid-s3821" xml:space="preserve"/>
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7234 </p>
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7235 <p>
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7236 <s xml:id="echoid-s3822" xml:space="preserve">Man ſtellte zween Magnete auf meſſingene Stative <lb/>ſo, daß ſie die ungleichnahmigen Pole auf einander zu keh-<lb/>ren, ſo kann man auf eine ſehr angenehme Art eine Kette <lb/>von eiſernen Kugeln zwiſchen ihnen aufhängen. </s>
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7237 <s xml:id="echoid-s3823" xml:space="preserve">Bringt <lb/>man den Pol eines andern Magnets daran, ſo fallen die <lb/>Kugeln herab.</s>
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7238 <s xml:id="echoid-s3824" xml:space="preserve"/>
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7239 </p>
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7240 <p>
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7241 <s xml:id="echoid-s3825" xml:space="preserve">Wenn man ein großes Stück Eiſen an den einen Pol <lb/>eines Magnets hält, ſo wird dadurch die anziehende Kraft <lb/>des andern Pols verſtärkt, und er in Stand geſetzt, mehr <lb/>als ſonſt aufzuheben.</s>
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7242 <s xml:id="echoid-s3826" xml:space="preserve"/>
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7243 </p>
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7244 <pb o="257" file="0277" n="277" rhead="über den Magnetiſmus."/>
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7245 </div>
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7246 <div xml:id="echoid-div293" type="section" level="1" n="281">
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7247 <head xml:id="echoid-head308" xml:space="preserve">Das magnetiſche Zurückſtoßen entſteht aus der An-<lb/>häufung der magnetiſchen Materie, und aus <lb/>dem Widerſtande, den ſie bey ihrem Eingange <lb/>in den Magnet leidet.</head>
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7248 <p>
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7249 <s xml:id="echoid-s3827" xml:space="preserve">Wenn man die beyden gleichnamigen Pole zweener <lb/>Magnete nahe an einander bringt, und unter eine mit Ei-<lb/>ſenfeile beſtreute Glastafel legt, ſo ordnen ſich die Feilſpäne <lb/>in krumme Linien, welche von einander zurück und nach <lb/>den entgegengeſetzten Polen zu gehen. </s>
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7250 <s xml:id="echoid-s3828" xml:space="preserve">Die aus B, Fig. <lb/></s>
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7251 <s xml:id="echoid-s3829" xml:space="preserve">105 hervorkommende Materie trift gegen D zu Wider-<lb/>ſtand an, wird alſo gezwungen zurück und um ihren eignen <lb/>Magnet herumzugehen, und ſo entſtehen zween Wirbel, <lb/>welche einander im Verhältniß der Stärke des durchgehen-<lb/>den Stroms entgegen wirken.</s>
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7252 <s xml:id="echoid-s3830" xml:space="preserve"/>
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7253 </p>
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7254 <p>
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7255 <s xml:id="echoid-s3831" xml:space="preserve">Man nehme eine ſtählerne Nadel, und beſtreiche ſie <lb/>von dem Ohr an bis zur Spitze fünf oder ſechsmal mit <lb/>dem Nordpole eines Magnetſtabs, ſo wird das Ohr der <lb/>Nordpol, und die Spitze der Südpol der Nadel wer@en.</s>
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7256 <s xml:id="echoid-s3832" xml:space="preserve"/>
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7257 </p>
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7258 <p>
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7259 <s xml:id="echoid-s3833" xml:space="preserve">Das Anziehen und Zurückſtoſſen der Magnete wird <lb/>durch zwiſchenſtehende Körper nicht gehindert.</s>
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7260 <s xml:id="echoid-s3834" xml:space="preserve"/>
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7261 </p>
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7262 <p>
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7263 <s xml:id="echoid-s3835" xml:space="preserve">Man ſtecke die Spitze der Nadel in Stahlfeile, ſo wird <lb/>ſie eine beträchtliche Menge Feilſpäne mit ſich in die Höhe <lb/>nehmen. </s>
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7264 <s xml:id="echoid-s3836" xml:space="preserve">Nun nehme man den Magnetſtab in die eine Hand, <lb/>und die Nadel mit den Feilſpänen in die andere, halte beyde <lb/>mit dem Horizont parallel und ſo, daß ſich die Spitze der <lb/>Nadel gegen den Südpol des Magnets zu kehret, ſo wer-<lb/>den die Feilſpäne von der Nadel abfallen; </s>
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7265 <s xml:id="echoid-s3837" xml:space="preserve">ſobald dieß ge-<lb/>ſchieht, ziehe man die Nadelſpitze aus dem Wirkungskreiſe <lb/>des Magnets hinweg, ſo wird ſie dadurch ihre anziehende <lb/>Kraft verlieren, und keine Stahlfeile mehr anziehen. </s>
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7266 <s xml:id="echoid-s3838" xml:space="preserve">Wird <lb/>die Nadel nicht weggenommen, ſondern einige Minuten <lb/>lang {1/2} Zoll weit von dem Stabe ab gehalten, ſo wird ihre <lb/>Polarität u@gekehrt.</s>
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7267 <s xml:id="echoid-s3839" xml:space="preserve"/>
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7268 </p>
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7269 <p>
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7270 <s xml:id="echoid-s3840" xml:space="preserve">Man hänge eine Anzahl Kugeln aneinander an den <lb/>Nordpol eines Magnets, und halte den Südpol eines an,
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7271 <pb o="258" file="0278" n="278" rhead="Verſuch"/>
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7272 dern Magnets an eine von den mittlern Kugeln, ſo wer-<lb/>den alle unter derſelben hängenden Kugeln aus dem mag-<lb/>netiſchen Strome herauskommen und herunterfallen; </s>
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7273 <s xml:id="echoid-s3841" xml:space="preserve">die <lb/>Kugel, an welche man den Magnet gehalten hat, wird <lb/>von demſelben angezogen werden, und alle übrigen werden <lb/>zwiſchen beyden Magneten hängen bleiben. </s>
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7274 <s xml:id="echoid-s3842" xml:space="preserve">Hält man den <lb/>Nordpol eines Magnets dagegen, ſo wird die Kugel, an <lb/>welche derſelbe gehalten wird, ebenfalls herabfallen.</s>
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7275 <s xml:id="echoid-s3843" xml:space="preserve"/>
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7276 </p>
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7277 <p>
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7278 <s xml:id="echoid-s3844" xml:space="preserve">Einige alte Schriftſteller vom Magnet führen eine <lb/>beſondere Erſcheinung an. </s>
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7279 <s xml:id="echoid-s3845" xml:space="preserve">Wenn man nemlich zween <lb/>Magnete, einen ſtärkern und einen ſchwächern, mit ihren <lb/>zurückſtoßenden Polen zuſammenbringe, ſo komme die <lb/>magnetiſche Kraft des ſchwächern in Unordnung, und er-<lb/>hole ſich erſt nach einigen Tagen wieder; </s>
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7280 <s xml:id="echoid-s3846" xml:space="preserve">die Polarität <lb/>des berührten Theils werde durch die ſtärkere Kraft umge-<lb/>kehrt; </s>
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7281 <s xml:id="echoid-s3847" xml:space="preserve">da aber dieſe Kraft nicht weit über die Polarfläche <lb/>hinausreiche, ſo ſey die unveränderte Kraft im übrigen <lb/>Theile des Steins im Stande, durch ihre entgegengeſezte <lb/>Gewalt den in Unordnung gerathenen Theil des Steins in <lb/>wenig Tagen wiederherzuſtellen.</s>
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7282 <s xml:id="echoid-s3848" xml:space="preserve"/>
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7283 </p>
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7284 <p>
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7285 <s xml:id="echoid-s3849" xml:space="preserve">Man hat noch kein gewiſſes Geſetz entdecken können, <lb/>nach welchem ſich die Anziehung des Magnets richtete; <lb/></s>
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7286 <s xml:id="echoid-s3850" xml:space="preserve">denn in verſchiednen Magneten verändert ſich die Kraft <lb/>in verſchiedenen Entfernungen ganz anders. </s>
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7287 <s xml:id="echoid-s3851" xml:space="preserve">Man hat <lb/>übrigens die magnetiſche Anziehung nicht vom Mittel-<lb/>punkte der Magnete, ſondern von den Polen aus zu rech-<lb/>nen.</s>
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7288 <s xml:id="echoid-s3852" xml:space="preserve"/>
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7289 </p>
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7290 <p>
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7291 <s xml:id="echoid-s3853" xml:space="preserve">Ob man gleich viele Verſuche gemacht hat, zu ent-<lb/>decken, ob die Kraft, durch welche zween Magnete einan-<lb/>der anziehen oder zurückſtoßen, nur bis auf eine gewiſſe <lb/>Entfernung wirke, ob der Grad ihrer Wirkung innerhalb <lb/>und in dieſer Entfernung gleichförmig oder veränderlich <lb/>ſey, und in welchem Verhältniſſe zur Entfernung er ab <lb/>oder zunehme, ſo hat man doch nichts weiter ſchließen <lb/>können, als daß die magnetiſche Kraft ſich manchmal wei-
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7292 <pb o="259" file="0279" n="279" rhead="über den Magnetiſmus."/>
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7293 ter erſtrecke, als zu anderer Zeit, und daß ihr Wirkungs-<lb/>kreis veränderlich ſey.</s>
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7294 <s xml:id="echoid-s3854" xml:space="preserve"/>
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7295 </p>
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7296 <p>
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7297 <s xml:id="echoid-s3855" xml:space="preserve">Ie kleiner der Magnet iſt, deſto größer iſt, bey <lb/>übrigens gleichen Umſtänden, ſeine Gewalt im Verhält-<lb/>niß mit ſeiner Größe. </s>
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7298 <s xml:id="echoid-s3856" xml:space="preserve">Dennoch wird die magnetiſche Kraft <lb/>durch die Einwirkung beyder Pole auf einander geſchwächt, <lb/>wenn die Axe allzukurz iſt, und alſo die Pole einander ſehr <lb/>nahe liegen. </s>
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7299 <s xml:id="echoid-s3857" xml:space="preserve">Es giebt noch viele andere Urſachen, welche <lb/>große Unregelmäßigkeit in der Anziehung der Magnete <lb/>verurſachen. </s>
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7300 <s xml:id="echoid-s3858" xml:space="preserve">Wenn man das Ende eines Magnets in <lb/>Stahlfeile taucht, ſo vertheilt ſich die Stahlfeile ſelten <lb/>gleichförmig, ſie legt ſich vielmehr fleckweiſe an, und liegt <lb/>an manchen Stellen dicker, als an andern. </s>
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7301 <s xml:id="echoid-s3859" xml:space="preserve">Man kann <lb/>die Stärke der magnetiſchen Anziehung in ebenderſelben <lb/>Entfernung verändern, wenn man die Magnete um ihre <lb/>Axe umwendet, und dadurch macht, daß ſich andere Stel-<lb/>len der Polarflächen auf einander zu kehren. </s>
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7302 <s xml:id="echoid-s3860" xml:space="preserve">Wenn man <lb/>einen ſtärkern Magnet an einen ſchwächern bringt, ſo zeigt <lb/>ſich eine Art von Repulſion zwiſchen den gleichnamigen <lb/>Polen, aber ſie wird durch die Anziehung des ſtärkern <lb/>Magnets überwunden.</s>
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7303 <s xml:id="echoid-s3861" xml:space="preserve"/>
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7304 </p>
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7305 <p>
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7306 <s xml:id="echoid-s3862" xml:space="preserve">Wenn eine beſtrichene Nadel nahe an einen Magnet <lb/>geſtellt wird, ſo wird ihre Richtung nach dem magne-<lb/>tiſchen Meridian geſtöret, und ſie nimmt eine andere <lb/>Richtung an, welche von ihrer Lage gegen die Pole des <lb/>Magnets und von ihrer Entfernung von denſelben ab-<lb/>hängt. </s>
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7307 <s xml:id="echoid-s3863" xml:space="preserve">Man ſtelle eine kleine Nadel auſ eine meſſingene <lb/>Spitze, und bringe ſie gegen den Magnet, ſo wird ſie ſich <lb/>verſchiedentlich richten, je nachdem es ihr Abſtand von <lb/>den Polen des Magnets mit ſich bringt. </s>
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7308 <s xml:id="echoid-s3864" xml:space="preserve">Auf eine noch <lb/>angenehmere Art kann man dieſe verſchiedenen Lagen und <lb/>Richtungen beobachten, wenn man mehrere beſtrichene <lb/>Nadeln zugleich um einen magnetiſchen Stab herum ſtellr. <lb/></s>
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7309 <s xml:id="echoid-s3865" xml:space="preserve">Auch die Bewegung einer kleinen Inclinationsnadel er-
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7310 <pb o="260" file="0280" n="280" rhead="Verſuch"/>
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7311 läutert dieſes Phänomen. </s>
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7312 <s xml:id="echoid-s3866" xml:space="preserve">Aus den drey letzten Verſuchen <lb/>kann man verſchiedene andere herleiten, um die krummen <lb/>Linien genau zu unterſuchen, nach welchen der Magnet <lb/>wirkt, und einige der wichtigſten Zweige der Lehre vom <lb/>Magnet mehr zu erläutern.</s>
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7313 <s xml:id="echoid-s3867" xml:space="preserve"/>
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7314 </p>
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7315 <p>
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7316 <s xml:id="echoid-s3868" xml:space="preserve">Der nördliche Magnetiſmus wird durch Verbindung <lb/>mit dem ſüdlichen aufgehoben, und umgekehrt. </s>
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7317 <s xml:id="echoid-s3869" xml:space="preserve">Daher <lb/>iſt klar, daß die beyden magnetiſchen Kräfte einander ent-<lb/>gegenwirken, und wenn ſie beyde einerley Arme eines <lb/>Magnets mitgetheilt werden, dieſer Arm die Kraft des <lb/>ſtärkern Magnetiſmus erhält, und zwar in der Propor-<lb/>tion, in welcher derſelbe den ſchwächern übertrift.</s>
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7318 <s xml:id="echoid-s3870" xml:space="preserve"/>
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7319 </p>
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7320 <p>
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7321 <s xml:id="echoid-s3871" xml:space="preserve">Zween gerade Magnete werden nicht ſchwächer, wenn <lb/>ſie mit einander parallel ſo gelegt werden, daß die un-<lb/>gleichnamigen Pole einander gegenüber ſtehen, und ihre <lb/>Enden durch zwey Stücken Eiſen mit einander verbunden <lb/>werden, welche den Umlauf der magnetiſchen Materie <lb/>befördern und unterhalten; </s>
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7322 <s xml:id="echoid-s3872" xml:space="preserve">man muß aber die Magnete <lb/>nie einander berühren laſſen, wofern ſie nicht in einerley <lb/>Richtung und mit den ungleichnamigen Polen beyſam-<lb/>men liegen.</s>
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7323 <s xml:id="echoid-s3873" xml:space="preserve"/>
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7324 </p>
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7325 <p>
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7326 <s xml:id="echoid-s3874" xml:space="preserve">Einen einzelnen geraden Magnet muß man allezeit <lb/>mit ſeinem Südpole gegen Norden oder niederwärts in der <lb/>nördlichen magnetiſchen Halbkugel halten, umgekehrt aber <lb/>in der ſüdlichen. </s>
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7327 <s xml:id="echoid-s3875" xml:space="preserve">Eiſen muß lman in unſerer Halbkugel <lb/>nie anders als mit dem Südpole eines geraden Magnets <lb/>aufheben.</s>
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7328 <s xml:id="echoid-s3876" xml:space="preserve"/>
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7329 </p>
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7330 <p>
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7331 <s xml:id="echoid-s3877" xml:space="preserve">Iede Art von gewaltſamen Schlagen ſchwächt die <lb/>Kraft eines Magnets; </s>
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7332 <s xml:id="echoid-s3878" xml:space="preserve">ein ſtarker Magnet iſt durch ver-<lb/>ſchiedene ſtarke Hammerſchläge ſeiner Kraft gänzlich be-<lb/>raubt worden, und überhaupt alles, was die innere Zu-<lb/>ſammenſetzung und Anordnung der Theile eines Magnets <lb/>ſtört oder ändert, z. </s>
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7333 <s xml:id="echoid-s3879" xml:space="preserve">B. </s>
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7334 <s xml:id="echoid-s3880" xml:space="preserve">das Beugen eines geraden eiſer-<lb/>nen Stabs oder Draths u. </s>
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7335 <s xml:id="echoid-s3881" xml:space="preserve">ſ. </s>
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7336 <s xml:id="echoid-s3882" xml:space="preserve">w.</s>
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7337 <s xml:id="echoid-s3883" xml:space="preserve">, thut auch ſeiner Kraft <lb/>Schaden.</s>
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7338 <s xml:id="echoid-s3884" xml:space="preserve"/>
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7339 </p>
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7340 <pb o="261" file="0281" n="281" rhead="über den Magnetiſmus."/>
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7341 <p>
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7342 <s xml:id="echoid-s3885" xml:space="preserve">Man fülle eine kleine trockne Glasröhre mit Eiſen-<lb/>feile, drücke dieſelbe feſt zuſammen und beſtreiche dann <lb/>die Röhre ſo, als ob es ein ſtählerner Stab wäre, ſo wird <lb/>ſie eine leichte Nadel u. </s>
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7343 <s xml:id="echoid-s3886" xml:space="preserve">dgl. </s>
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7344 <s xml:id="echoid-s3887" xml:space="preserve">anziehen; </s>
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7345 <s xml:id="echoid-s3888" xml:space="preserve">ſchüttelt man aber <lb/>die Röhre ſo, daß die Lage der Feilſpäne verändert wird, <lb/>ſo verſchwindet die magnetiſche Kraft.</s>
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7346 <s xml:id="echoid-s3889" xml:space="preserve"/>
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7347 </p>
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7348 <p>
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7349 <s xml:id="echoid-s3890" xml:space="preserve">Obgleich ein gewaltſames Schlagen den bereits er-<lb/>haltenen Magnetiſmus auſhebt, ſo giebt doch ebendaſſelbe <lb/>dem Eiſen eine Polarität, wenn es dieſelbe vorher noch <lb/>nicht hatte; </s>
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7350 <s xml:id="echoid-s3891" xml:space="preserve">einige wenige ſtarke Hammerſchläge geben <lb/>einem eiſernen Stabe die Polarität, und wenn man den <lb/>Stab in vertikaler Stellung hält, und erſt das eine, dann <lb/>das andere Ende deſſelben hämmert, ſo kann man die Pole <lb/>verändern. </s>
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7351 <s xml:id="echoid-s3892" xml:space="preserve">Dreht man ein langes Stück Eiſendrath <lb/>mehrere male vor- und rückwärts, bis es zerbricht, ſo <lb/>findet man die zerbrochene Stelle magnetiſch.</s>
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7352 <s xml:id="echoid-s3893" xml:space="preserve"/>
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7353 </p>
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7354 <p>
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7355 <s xml:id="echoid-s3894" xml:space="preserve">Wird ein Magnet durch die Axe geſchnitten, ſo <lb/>ſtoßen beyde Stücke, die vorher zuſammen hiengen, ein-<lb/>ander zurück.</s>
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7356 <s xml:id="echoid-s3895" xml:space="preserve"/>
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7357 </p>
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7358 <p>
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7359 <s xml:id="echoid-s3896" xml:space="preserve">Durchſchneidet man einen Magnet ſenkrecht durch <lb/>ſeine Axe, ſo bekommen die Theile, welche vorher zuſam-<lb/>men hiengen, entgegengeſetzte Pole, und es wird aus je-<lb/>dem Stück ein neuer Magnet.</s>
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7360 <s xml:id="echoid-s3897" xml:space="preserve"/>
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7361 </p>
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7362 <p>
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7363 <s xml:id="echoid-s3898" xml:space="preserve">Aus dieſen und ähnlichen Verſuchen ſchließt Herr <lb/>Beles, daß der Magnetiſmus aus zwoen verſchiedenen <lb/>Kräften beſtehe, welche in ihrem natürlichen Zuſtande <lb/>verbunden ſind, und nur wenig merkliche Wirkung thun, <lb/>doch einander ſelbſt jederzeit ſtark anziehen; </s>
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7364 <s xml:id="echoid-s3899" xml:space="preserve">wenn ſie aber <lb/>mit Gewalt getrennt werden, eben ſo, wie die Kräfte der <lb/>Elektricität wirken. </s>
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7365 <s xml:id="echoid-s3900" xml:space="preserve">Denn, wenn der Magnetiſmus in <lb/>zweyen verſchiedenen Stücken Stahl durch den Südpol ei-<lb/>nes Magnets erregt wird, ſo ſtoßen die Enden einander <lb/>zurück; </s>
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7366 <s xml:id="echoid-s3901" xml:space="preserve">wird aber das eine Stück mit de@ Nordpole und
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7367 <pb o="262" file="0282" n="282" rhead="Verſuch"/>
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7368 das andre mit dem Südpole beſtrichen, ſo ziehen ſie einan-<lb/>der an. </s>
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7369 <s xml:id="echoid-s3902" xml:space="preserve">Er nimmt ferner an, daß ein Magnet nicht ganz <lb/>nach dem Verhältniß ſeiner eignen Stärke, ſondern auch <lb/>nach dem Verhältniß der Menge des anzuziehenden Eiſens <lb/>anziehe und angezogen werde; </s>
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7370 <s xml:id="echoid-s3903" xml:space="preserve">daß der Magnetiſmus eine <lb/>allem Eiſen anhängende Eigenſchaft ſey, die von demſel-<lb/>ben nicht könne getrennt werden; </s>
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7371 <s xml:id="echoid-s3904" xml:space="preserve">denn das Feuer, ob es <lb/>gleich den ſchon vorhandenen Magnetiſmus aufhebt, beraubt <lb/>doch das Eiſen nicht ſeiner natürlichen Menge von magne-<lb/>tiſcher Materie, es giebt ihm vielmehr eine Polarität, <lb/>oder einen beſtimmten Magnetiſmus, je nachdem man das <lb/>Eiſen auf verſchiedene Art erhitzet oder abkühlet.</s>
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7372 <s xml:id="echoid-s3905" xml:space="preserve"/>
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7373 </p>
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7374 <p>
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7375 <s xml:id="echoid-s3906" xml:space="preserve">In einem unbewafneten Magnet geht der magneti-<lb/>ſche Strom auf allen Seiten in krummen Linien gegen die <lb/>entgegengeſetzten Pole zurück; </s>
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7376 <s xml:id="echoid-s3907" xml:space="preserve">ſetzt man aber Armaturen <lb/>oder eiſerne Platten an jeden Pol, ſo wird die Richtung <lb/>der magnetiſchen Materie verändert, und in den Fuß der <lb/>Armatur geleitet, wo ſie ſich concentriret, ſo daß der Strom <lb/>der magnetiſchen Materie, welcher ſonſt von einem Pole <lb/>zum andern geht, wenn man an die Füße der Armaturen <lb/>einen eiſernen Träger anbringt, von einent Fuße zum an-<lb/>dern durch den Träger geleitet wird, wodurch eine Anzie-<lb/>hung von beträchtlicher Stärke bewirkt wird. </s>
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7377 <s xml:id="echoid-s3908" xml:space="preserve">Man kann <lb/>auch zwiſchen beyden Füßen eine Kette von Kugeln anſtatt <lb/>des Trägers anbringen.</s>
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7378 <s xml:id="echoid-s3909" xml:space="preserve"/>
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7379 </p>
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7380 <p>
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7381 <s xml:id="echoid-s3910" xml:space="preserve">Man lege den armirten Magnet unter eine mit <lb/>Stahlfeile beſtreute Glasſcheibe, ſo wird ſich die Feile in <lb/>krumme Linien ordnen, die von einem Fuße zum andern <lb/>gehen.</s>
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7382 <s xml:id="echoid-s3911" xml:space="preserve"/>
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7383 </p>
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7384 <p>
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7385 <s xml:id="echoid-s3912" xml:space="preserve">Die Armatur muß von weichem Eiſen, das ein recht <lb/>gleichförmiges Korn hat, gemacht, und an die Enden <lb/>des Magnets wohl angepaßt werden; </s>
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7386 <s xml:id="echoid-s3913" xml:space="preserve">auch muß ſie deſto <lb/>dicker ſeyn, je größer der Abſtand beyder Pole von einan-<lb/>der iſt.</s>
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7387 <s xml:id="echoid-s3914" xml:space="preserve"/>
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7388 </p>
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7389 <pb o="263" file="0283" n="283" rhead="über den Magnetiſmus."/>
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7390 <p>
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7391 <s xml:id="echoid-s3915" xml:space="preserve">Herr Savery führt verſchiedene Beyſpiele an, um <lb/>die Gewalt und Wirkung des Magnetiſmus der Erdkugel <lb/>daraus zu erklären, unter andern bemerkt er, daß eiſerne <lb/>Stangen kleine Stückchen Eiſen halten. </s>
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7392 <s xml:id="echoid-s3916" xml:space="preserve">Er hieng eine <lb/>5 Schuh lange eiſerne Stange an einer am obern Ende <lb/>befeſtigten Schlinge auf, wiſchte das untere Ende der-<lb/>ſelben und die Spitze eines eiſernen Nagels ſorgfältig <lb/>ab, damit kein Staub oder Feuchtigkeit die vollkomme-<lb/>ne Berührung beyder verhindere; </s>
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7393 <s xml:id="echoid-s3917" xml:space="preserve">alsdann hielt er den <lb/>Nagel mit aufwärts gekehrter Spitze unter den Stab, <lb/>drückte ihn hart daran, hielte den Finger etwa 30 <lb/>Secunden lang unter den Kopf des Nagets, und zog <lb/>denſelben alsdann ſanft niederwärts, ſo daß der Na-<lb/>gel nicht in Schwingung gerathen konnte; </s>
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7394 <s xml:id="echoid-s3918" xml:space="preserve">fiel er her-<lb/>ab, ſo wiſchte er die Spitze, wie zuvor, ab, und ver-<lb/>ſuchte eine neue Stelle an der Grundfläche der Stan-<lb/>ge. </s>
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7395 <s xml:id="echoid-s3919" xml:space="preserve">Waren beyde Enden der Stange gleich geſtaltet, <lb/>und hatte ſie keine beſtändige magnetiſche Kraft, ſo <lb/>war es gleichgültig, welches Ende er unterwärts kehr-<lb/>te; </s>
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7396 <s xml:id="echoid-s3920" xml:space="preserve">hatte ſie aber einen geringen Grad von Polarität, <lb/>ſo gieng der Verſuch mit einem Ende beſſer von ſtat-<lb/>ten, als mit dem andern.</s>
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7397 <s xml:id="echoid-s3921" xml:space="preserve"/>
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7398 </p>
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7399 <p>
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7400 <s xml:id="echoid-s3922" xml:space="preserve">Das obere Ende A eines langen eiſernen Sta-<lb/>bes, welcher keine beſtimmte Polarität hat, wird das <lb/>nördliche Ende einer Magnetnadel anziehen, das un-<lb/>tere Ende B aber wird daſſelbe zurückſtoßen; </s>
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7401 <s xml:id="echoid-s3923" xml:space="preserve">kehrt <lb/>man aber den Stab um, ſo wird B, welches nun-<lb/>mehr das obere Ende iſt, den Nordpol der Nadel, <lb/>den es vorher zurückſtieß, anziehen. </s>
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7402 <s xml:id="echoid-s3924" xml:space="preserve">Eben ſo iſt der <lb/>Fall, wenn der Stab horizontal in den magnetiſchen <lb/>Meridian gelegt wird, das ſüdwärts gekehrte Ende <lb/>wird ein Nordpol ſeyn.</s>
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7403 <s xml:id="echoid-s3925" xml:space="preserve"/>
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7404 </p>
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7405 <p>
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7406 <s xml:id="echoid-s3926" xml:space="preserve">Eiſerne Fenſterſtäbe, welche lange Zeit in einer <lb/>vertikalen Stellung geſtanden haben, erhalten eine be-
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7407 <pb o="264" file="0284" n="284" rhead="Verſuch"/>
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7408 ſtimmte Polarität. </s>
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7409 <s xml:id="echoid-s3927" xml:space="preserve">Leuwenhoek gedenket eines eiſer-<lb/>nen Kreuzes, welches auf 200 Jahre lang auf der Spitze <lb/>eines Kirchthurms geſtanden, und einen ſtarken bleiben-<lb/>den Magnetiſmus erhalten hatte.</s>
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7410 <s xml:id="echoid-s3928" xml:space="preserve"/>
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7411 </p>
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7412 </div>
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7413 <div xml:id="echoid-div294" type="section" level="1" n="282">
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7414 <head xml:id="echoid-head309" xml:space="preserve">Die Nadel des Seecompaſſes zeigt nicht genau <lb/>nach Norden, ſondern verändert ihr Azimuth, <lb/>und weicht bisweilen oſtwärts, bisweilen weſt-<lb/>wärts vom Meridian ab.</head>
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7415 <p>
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7416 <s xml:id="echoid-s3929" xml:space="preserve">Dieſe Abweichung vom Meridian wird die De-<lb/>clination oder Variation der Nadel genennt, und <lb/>iſt an verſchiedenen Orten der Erde verſchieden, hier <lb/>weſtlich, dort öſtlich, auch an Orten, wo ſie nach ei-<lb/>nerley Gegend geht, dennoch von verſchiedener Größe.</s>
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7417 <s xml:id="echoid-s3930" xml:space="preserve"/>
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7418 </p>
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7419 <p>
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7420 <s xml:id="echoid-s3931" xml:space="preserve">Man hat zwar die Richtung des Seecompaſſes ſchon <lb/>im vierzehnten und funfzehnten Jahrhundert zum Ge-<lb/>brauch der Schiffahrt angewendet; </s>
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7421 <s xml:id="echoid-s3932" xml:space="preserve">aber man findet keine <lb/>Spur, daß man damals etwas von ihrer Abweichung von <lb/>Norden und Süden gewußt habe.</s>
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7422 <s xml:id="echoid-s3933" xml:space="preserve"/>
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7423 </p>
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7424 <p>
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7425 <s xml:id="echoid-s3934" xml:space="preserve">Colom ſoll zu Ende des funfzehnten Jahrhunderts <lb/>auf ſeiner Reiſe nach Amerika die Variation der Magnet-<lb/>nadel zuerſt gemuthmaſſet haben. </s>
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7426 <s xml:id="echoid-s3935" xml:space="preserve">Aber der erſte, der <lb/>ihre Wirklichkeit außer Zweifel ſetzte, und fand, daß ſie <lb/>an einerley Orte bey allen Nadeln die nehmliche ſey, iſt <lb/>nach allgemeinem Geſtändniß Sebaſtian Cabot im <lb/>Jahre 1497 geweſen.</s>
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7427 <s xml:id="echoid-s3936" xml:space="preserve"/>
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7428 </p>
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7429 <p>
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7430 <s xml:id="echoid-s3937" xml:space="preserve">Man hielt dieſe Variation nach ihrer Entdeckung <lb/>durch Cabot lange Zeit für unveränderlich; </s>
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7431 <s xml:id="echoid-s3938" xml:space="preserve">bis Gel-<lb/>librand, ohngefähr im Iahr 1625, fand, daß ſie auch <lb/>an einem und ebendemſelben Orte zu verſchiedenen Zeiten <lb/>verſchieden ſey.</s>
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7432 <s xml:id="echoid-s3939" xml:space="preserve"/>
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7433 </p>
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7434 <p>
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7435 <s xml:id="echoid-s3940" xml:space="preserve">Wenn eine genau im Gleichgewicht aufgehangene <lb/>Magnetnadel ſich frey in einer vertikalen Ebne drehen
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7436 <pb o="265" file="0285" n="285" rhead="über den Magnetiſmus."/>
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7437 kann, ſo neigt ſich ihr Nordpol unter den Ho-<lb/>rizont, und ihr Südpol erhebt ſich über den-<lb/>ſelben; </s>
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7438 <s xml:id="echoid-s3941" xml:space="preserve">dieſe Eigenſchaft, welche die Inclination <lb/>oder Neigung der Nadel heißt, ward von Robert <lb/>Normann um das Jahr 1576 entdeckt.</s>
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7439 <s xml:id="echoid-s3942" xml:space="preserve"/>
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7440 </p>
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7441 <p>
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7442 <s xml:id="echoid-s3943" xml:space="preserve">Es iſt hieraus klar, daß ſich die magnetiſche Kraft <lb/>an der Nadel des Compaſſes auf eine doppelte Art äußert, <lb/>einmal indem ſie ſich nach dem magnetiſchen Meridian <lb/>richtet, das anderemahl, indem ſie einen Winkel mit dem <lb/>Horizonte macht.</s>
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7443 <s xml:id="echoid-s3944" xml:space="preserve"/>
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7444 </p>
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7445 <p>
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7446 <s xml:id="echoid-s3945" xml:space="preserve">Die Stellung der inclinirenden Nadel, wenn ſie <lb/>im magnetiſchen Meridiane ruht, wird die magneti-<lb/>ſche Linie genannt.</s>
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7447 <s xml:id="echoid-s3946" xml:space="preserve"/>
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7448 </p>
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7449 <p>
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7450 <s xml:id="echoid-s3947" xml:space="preserve">Man hat verſchiedene Arten von runden Magneten, <lb/>unter dem Namen der Terrellen (terrellae) gemacht, um <lb/>die Phänomene der Variation und Neigung der Nadel <lb/>durch Beobachtungen der Stellungen des Compaſſes an <lb/>verſchiedenen Punkten der Terrellen, und Vergleichung <lb/>derſelben mit den beobachteten Stellungen der Magnet-<lb/>nadel an verſchiedenen Orten der Erde, zu erklären. </s>
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7451 <s xml:id="echoid-s3948" xml:space="preserve">Zwar <lb/>hat man hierinn wegen unvollkommner Einrichtung dieſer <lb/>Kugeln noch wenig glücklichen Fortgang gemacht; </s>
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7452 <s xml:id="echoid-s3949" xml:space="preserve">inzwi-<lb/>ſchen hat doch Herr Magellan eine angegeben, von <lb/>welcher ſich hoffen läßt, daß man ſie wirklich zu Ent, <lb/>deckung der Geſetze, nach welchen ſich dieſe räthſelhaften <lb/>Erſcheinungen richten, werde gebrauchen können. </s>
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7453 <s xml:id="echoid-s3950" xml:space="preserve">Man <lb/>wird finden, daß die meiſten Phänomene der Richtung der <lb/>Magnetnadel mit den Erſcheinungen einer auf die Terrelle <lb/>geſtellten Nadel übereinſtimmen.</s>
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7454 <s xml:id="echoid-s3951" xml:space="preserve"/>
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7455 </p>
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7456 <p>
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7457 <s xml:id="echoid-s3952" xml:space="preserve">Um das Jahr 1722 und 1723 machte Georg <lb/>Graham eine Menge Beobachtungen über die tägliche <lb/>Variation der Magnetnadel. </s>
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7458 <s xml:id="echoid-s3953" xml:space="preserve">Im Iahr 1750 fand <lb/>Herr Wargentin eine reguläre tägliche Veränderung <lb/>der Declination, ingleichen eine Störung derſelben bey
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7459 <pb o="266" file="0286" n="286" rhead="Verſuch"/>
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7460 Nordlichtern. </s>
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7461 <s xml:id="echoid-s3954" xml:space="preserve">Um das Ende des Jahrs 1756 fieng <lb/>Herr Canton ſeine Beobachtungen über die Variation <lb/>an, und 1759 theilte er der königlichen Societät folgende <lb/>wichtige Versuche mit.</s>
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7462 <s xml:id="echoid-s3955" xml:space="preserve"/>
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7463 </p>
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7464 <p>
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7465 <s xml:id="echoid-s3956" xml:space="preserve">Er hatte ſeine Beobachtungen 603 Tage lang fort-<lb/>geſetzt, und an 574 Tagen die tägliche Veränderung re-<lb/>gelmäßig befunden. </s>
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7466 <s xml:id="echoid-s3957" xml:space="preserve">Die damalige weſtliche Ab-<lb/>weichung der Nadel nahm von 8 oder 9 Uhr <lb/>des Morgens bis etwa 1 oder 2 Uhr des Nach-<lb/>mittags zu; </s>
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7467 <s xml:id="echoid-s3958" xml:space="preserve">alsdann ſtand die Nadel eine Zeitlang <lb/>ſtill, endlich gieng ſie wieder zurück, bis ſie in der Nacht, <lb/>oder am nächſten Morgen wieder an ihre vorige Stelle <lb/>kam.</s>
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7468 <s xml:id="echoid-s3959" xml:space="preserve"/>
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7469 </p>
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7470 <p>
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7471 <s xml:id="echoid-s3960" xml:space="preserve">Dieſe tägliche Veränderung iſt irregulär, wenn ſich <lb/>die Nadel im erſten Theile des Vormittags oſtwärts, oder <lb/>im letzten Theile des Nachmittags weſtwärts beweget; <lb/></s>
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7472 <s xml:id="echoid-s3961" xml:space="preserve">auch wenn ſie ſich in der Nacht ſtark oder plötzlich und in <lb/>kurzer Zeit nach beyderley Seiten beweget.</s>
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7473 <s xml:id="echoid-s3962" xml:space="preserve"/>
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7474 </p>
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7475 <p>
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7476 <s xml:id="echoid-s3963" xml:space="preserve">Dergleichen Unregelmäſſigkeiten kommen ſelten öfter, <lb/>als monatlich ein bis zweymal vor, und ſind jederzeit mit <lb/>einem Nordlichte begleitet.</s>
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7477 <s xml:id="echoid-s3964" xml:space="preserve"/>
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7478 </p>
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7479 <p>
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7480 <s xml:id="echoid-s3965" xml:space="preserve">Die anziehende Kraft eines Magnets nimmt ab, <lb/>indem er erwärmt wird, und wächſt, indem er abkühlet; <lb/></s>
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7481 <s xml:id="echoid-s3966" xml:space="preserve">je ſtärker ein Magnet iſt, deſto mehr verliert er in eben <lb/>demſelben Grade der Wärme.</s>
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7482 <s xml:id="echoid-s3967" xml:space="preserve"/>
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7483 </p>
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7484 </div>
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7485 <div xml:id="echoid-div295" type="section" level="1" n="283">
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7486 <head xml:id="echoid-head310" xml:space="preserve">Erſter Verſuch.</head>
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7487 <p>
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7488 <s xml:id="echoid-s3968" xml:space="preserve">Herr Canton ſtellte an die Gegend Oſt-Nord-Oſt <lb/>eines Compaſſes, der etwas über 3 Zoll im Durchmeſſer <lb/>hatte, einen kleinen 2 Zoll langen, {1/2} Zoll breiten und <lb/>{3/20} Zoll dicken Magnet parallel mit dem magnetiſchen <lb/>Meridian, und ſo weit ab, daß die Kraft ſeines ſüdli-<lb/>chen Endes gerade im Stande war, den Nordpol der <lb/>Nadel auf Nord-Oſt, oder auf 45° zu halten.</s>
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7489 <s xml:id="echoid-s3969" xml:space="preserve"/>
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7490 </p>
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7491 <pb o="267" file="0287" n="287" rhead="über den Magnetiſmus."/>
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7492 <p>
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7493 <s xml:id="echoid-s3970" xml:space="preserve">Nachdem er den Magnet mit einem meſſingenen <lb/>Gewichte von 16 Unzen beſchweret hatte, goß er@ ohnge-<lb/>fähr 2 Unzen ſiedendes Waſſer darauf, wodurch der <lb/>Magnet etwa 7 — 8 Minuten lang nach und nach erhitzt <lb/>ward, während dieſer Zeit bewegte ſich die Nadel etwa <lb/>{3/4} Grad weſtwärts, und ſtand bey 44{1/4}° ſtill; </s>
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7494 <s xml:id="echoid-s3971" xml:space="preserve">binnen 9 <lb/>Minuten kam ſie um {1/4} Grad, oder bis 44{1/2}° zurück, <lb/>brauchte aber einige Stunden Zeit, ehe ſie ihre vorige <lb/>Stellung auf 45° wieder erhielt.</s>
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7495 <s xml:id="echoid-s3972" xml:space="preserve"/>
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7496 </p>
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7497 </div>
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7498 <div xml:id="echoid-div296" type="section" level="1" n="284">
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7499 <head xml:id="echoid-head311" xml:space="preserve">Zweyter Verſuch.</head>
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7500 <p>
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7501 <s xml:id="echoid-s3973" xml:space="preserve">Er ſtellte an jeder Seite des Compaſſes parallel mit <lb/>dem magnetiſchen Meridian, einen ſtarken Magnet von <lb/>der obenerwähnten Größe ſo, daß die ſüdlichen Enden <lb/>beyder Magnete gleich ſtark auf den Nordp@l der Nadel <lb/>wirkten, und dieſelbe in dem magnetiſchen Meridiane <lb/>erhielten; </s>
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7502 <s xml:id="echoid-s3974" xml:space="preserve">ward aber einer von den Magneten weggenom-<lb/>men, ſo zog der andere die Nadel ſo an, daß ſie auf 45° <lb/>ſtand. </s>
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7503 <s xml:id="echoid-s3975" xml:space="preserve">Jeder Magnet ward nunmehr mit einem Ge-<lb/>wichte von 16 Unzen beſchwert. </s>
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7504 <s xml:id="echoid-s3976" xml:space="preserve">Auf den ötlichen <lb/>Magnet wurden zwo Unzen ſiedendes Waſſer gegoſſen, <lb/>und die Nadel bewegte fich in einer Minute um einen <lb/>halben Grad, und fuhr 7 Minuten lang fort, ſich <lb/>weſtwärts zu bewegen, wodurch ſie bis 2{3/4}° kam. </s>
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7505 <s xml:id="echoid-s3977" xml:space="preserve">Hier <lb/>ſtand ſie eine Zeit lang ſrill, kam aber in 24 Minuten <lb/>vom erſten Anfange gerechnet, auf 2{1/2}, und in 50 Mi-<lb/>nuten auf 2{1/4}° zurück. </s>
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7506 <s xml:id="echoid-s3978" xml:space="preserve">Er füllte nunmehr das weſtliche <lb/>Gewicht mit ſiedendem Waſſer, wobey die Nadel in <lb/>einer Minute auf 1{1/4}° zurückkam, in 6 Minuten dar-<lb/>auf ſtand ſie {1/2}° öſtlich; </s>
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7507 <s xml:id="echoid-s3979" xml:space="preserve">und etwa 40 Minuten dar-<lb/>nach kehrte ſie zu dem magnetiſchen Nordpunkte, d. </s>
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7508 <s xml:id="echoid-s3980" xml:space="preserve">i. <lb/></s>
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7509 <s xml:id="echoid-s3981" xml:space="preserve">in ihre anfängliche Stellung zurück.</s>
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7510 <s xml:id="echoid-s3982" xml:space="preserve"/>
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7511 </p>
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7512 <p>
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7513 <s xml:id="echoid-s3983" xml:space="preserve">Es iſt klar, daß die magnetiſchen Theile der Erde <lb/>auf der Oſtſeite des magnetiſchen Meridians den Nord-
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7514 <pb o="268" file="0288" n="288" rhead="Verſuch"/>
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7515 pol der Nadel eben ſo ſtark anziehen, als die magneti-<lb/>ſchen Theile auf der Weſtſeite deſſelben. </s>
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7516 <s xml:id="echoid-s3984" xml:space="preserve">Werden nun <lb/>die öſtlichen Theile Vormittags eher von der Sonne er-<lb/>wärmt, als die weſtlichen, ſo wird ſich die Nadel <lb/>weſtwärts bewegen, und ihre weſtliche Variation wird <lb/>größer werden; </s>
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7517 <s xml:id="echoid-s3985" xml:space="preserve">wenn die Wärme der anziehenden <lb/>Theile der Erde auf jeder Seite des magnetiſchen Me-<lb/>ridians gleich ſtark zunimmt, ſo wird die Nadel ſtill <lb/>ſtehen, und die Variation wird alsdann am größten <lb/>ſeyn; </s>
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7518 <s xml:id="echoid-s3986" xml:space="preserve">wenn aber die weſtlichen magnetiſchen Theile ent-<lb/>weder ſchneller erwärmt werden, oder langſamer abküh-<lb/>len, als die öſtlichen, ſo wird ſich die Nadel oſtwärts <lb/>bewegen, oder die weſtliche Abweichung wird abnehmen, <lb/>und wenn die üſtlichen und weſtlichen Theile gleich ge-<lb/>ſchwind abkühlen, ſo wird die Nadel wieder ſtill ſtehen, und <lb/>ihre weſtliche Abweichung am kleinſten ſeyn. </s>
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7519 <s xml:id="echoid-s3987" xml:space="preserve">Man kann <lb/>dies noch mehr erläutern, wenn man den Compaß mit <lb/>den beyden Magneten, wie im letzten Verſuche, an einem <lb/>Sommertage hinter einen Sonnenſchirm ſtellt; </s>
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7520 <s xml:id="echoid-s3988" xml:space="preserve">denn <lb/>wenn der Schirm ſo geſtellt wird, daß die Sonne nur <lb/>den öſtlichen Magnet beſcheinen kann, ſo wird die Nadel <lb/>ihre Richtung merklich ändern, und ſich weſtwärts be-<lb/>wegen; </s>
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7521 <s xml:id="echoid-s3989" xml:space="preserve">ſteht aber der öſtliche Magnet im Schatten, in-<lb/>dem die Sonne auf den weſtlichen ſcheint, ſo geht die <lb/>Nadel nach der andern Seite. </s>
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7522 <s xml:id="echoid-s3990" xml:space="preserve">Nach dieſer Theorie muß <lb/>die tägliche Variation im Sommer größer, als im Win-<lb/>ter ſeyn; </s>
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7523 <s xml:id="echoid-s3991" xml:space="preserve">die Beobachtungen ſtimmen hiemit äberein, <lb/>und ſie wird im Junius und Julius faſt doppelt ſo groß, <lb/>als im December und Januar, geſunden.</s>
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7524 <s xml:id="echoid-s3992" xml:space="preserve"/>
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7525 </p>
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7526 <p>
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7527 <s xml:id="echoid-s3993" xml:space="preserve">Die unregelmäßige tägliche Variation muß von <lb/>einer andern Urſache, als von der Sonnenwärme, ent-<lb/>ſtehen; </s>
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7528 <s xml:id="echoid-s3994" xml:space="preserve">und hier müſſen wir unſere Zuflucht zu der unter-<lb/>irdiſchen Wärme nehmen, welche keine regelmäßige Be-<lb/>ziehung auf die Zeit hat, und dennoch, wenn ſie ſich in den <lb/>nordiſchen Gegenden vergrößert, die anziehende Kraft
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diff changeset
7529 <pb o="269" file="0289" n="289" rhead="über den Magnetiſmus."/>
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diff changeset
7530 ber magnetiſchen Erdtheile gegen den Nordpol der Nadel <lb/>verſtärkt. </s>
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7531 <s xml:id="echoid-s3995" xml:space="preserve">D. </s>
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7532 <s xml:id="echoid-s3996" xml:space="preserve">Hales hat im Anhange des zweyten Ban-<lb/>des ſeiner Statiſchen Verſuche eine gute Beobachtung <lb/>über dieſe Wärme. </s>
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7533 <s xml:id="echoid-s3997" xml:space="preserve">“Daß die Wärme der Erde, ſagt <lb/>er, in einiger Tiefe unter der Oberfläche, Einfluß auf <lb/>die Beförderung des Thauens und auf den Uebergang <lb/>vom Froſte zum Thauwetter habe, iſt aus folgender <lb/>Beobachtung klar. </s>
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7534 <s xml:id="echoid-s3998" xml:space="preserve">Am 27ſten November 1731 war <lb/>der wenige Schnee, der die Nacht über gefallen war, <lb/>den Vormittag darauf um eilf Uhr, mehrentheils ge-<lb/>ſchmolzen, einige Stellen im Park ausgenommen, wo <lb/>es Waſſerbehältniſſe gab, die mit Erde bedeckt waren, <lb/>auf welchen der Schnee liegen blieb, die Behältniſſe <lb/>mochten mit Waſſer angefüllt, oder leer ſeyn; </s>
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7535 <s xml:id="echoid-s3999" xml:space="preserve">ſo wie <lb/>auch an denjenigen Stellen, wo Röhren unter der Erde <lb/>lagen. </s>
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7536 <s xml:id="echoid-s4000" xml:space="preserve">Ein Beweis, daß dieſe Behältniſſe die Wär-<lb/>me der Erde aufhielten, und aus der Tiefe hervorzu-<lb/>dringen hinderten; </s>
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7537 <s xml:id="echoid-s4001" xml:space="preserve">denn der Schnee blieb auch an Or-<lb/>ten liegen, wo die Behältniſſe mit mehr als 4 Schuh <lb/>hoch Erde bedeckt waren. </s>
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7538 <s xml:id="echoid-s4002" xml:space="preserve">So blieb er auch auf dem <lb/>Strohe, den Ziegeln, und den obern Flächen der Mau-<lb/>ern liegen.</s>
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7539 <s xml:id="echoid-s4003" xml:space="preserve">”</s>
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7540 </p>
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7541 <p>
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7542 <s xml:id="echoid-s4004" xml:space="preserve">Daß die Luft zunächſt an der Erde durch die Wär-<lb/>me der Erde erwärmt werde, fällt in die Augen; </s>
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7543 <s xml:id="echoid-s4005" xml:space="preserve">der <lb/>D. </s>
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7544 <s xml:id="echoid-s4006" xml:space="preserve">Miles hat zu Tooting in Surren darüber häufige <lb/>Beobachtungen mit Thermomet?</s>
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7545 <s xml:id="echoid-s4007" xml:space="preserve">rn angeſtellt, die er früh <lb/>vor Tage in verſchiedenen Höhen über der Erde aufſtellete, <lb/>wie er im 48ſten Bande der Transactionen umſtändlich <lb/>erzählet.</s>
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7546 <s xml:id="echoid-s4008" xml:space="preserve"/>
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7547 </p>
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7548 <p>
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7549 <s xml:id="echoid-s4009" xml:space="preserve">Man kann die Nordlichter, welche zu der Zeit er-<lb/>ſcheinen, wenn die Richtung der Nadel durch die Wärme <lb/>der Erde verändert wird, für Elektricität der erwärmten <lb/>Luft über der Erde annehmen. </s>
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7550 <s xml:id="echoid-s4010" xml:space="preserve">Sie erſcheinen haupt-<lb/>ſächlich in den nordiſchen Gegenden, weil daſelbſt die
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7551 <pb o="270" file="0290" n="290" rhead="Verſuch über den Magnetiſmus."/>
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7552 Veränderungen der Wärme am größten ſind. </s>
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7553 <s xml:id="echoid-s4011" xml:space="preserve">Dieſe <lb/>Hypotheſe wird wahrſcheinlich, wenn man bedenkt, daß <lb/>die Elektricität die Urſache des Donners und Blitzes iſt, <lb/>und daß man ſie zur Zeit des Nordlichts aus den Wolken <lb/>ziehen kann; </s>
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7554 <s xml:id="echoid-s4012" xml:space="preserve">daß die Bewohner der Nordländer vorzüg-<lb/>lich ſtarke Nordlichter bemerken, wenn nach ſtrenger Kälte <lb/>plötzliches Thauwetter einfällt, daß man auch nunmehr <lb/>eine Subſtanz kennet, welche ohne Reiben, bloß durch <lb/>Zunehmen oder Abnehmen ihrer Wärme, elektriſch wird. <lb/></s>
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7555 <s xml:id="echoid-s4013" xml:space="preserve">Dieſes iſt der Turmalin. </s>
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7556 <s xml:id="echoid-s4014" xml:space="preserve">Legt man denſelben auf eine <lb/>erwärmte Glas, oder Metallplatte, ſo daß beyde gegen <lb/>die Fläche der heißen Platte ſenkrecht geſtellte Seiten <lb/>gleich ſtark erwärmt werden, ſo wird während der Er-<lb/>wärmung die eine Seite eine poſitive, die andere eine <lb/>negative Elektricität zeigen; </s>
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7557 <s xml:id="echoid-s4015" xml:space="preserve">eben dies wird geſchehen, <lb/>wenn man ihn aus ſiedendem Waſſer nimmt, und abküh-<lb/>len läßt, nur daß diejenige Seite, welche beym Erwär-<lb/>men poſitiv war, beym Abkühlen negativ, und die vor-<lb/>her negative Seite jetzt poſitiv wird.</s>
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7558 <s xml:id="echoid-s4016" xml:space="preserve"/>
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7559 </p>
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7560 <pb file="0291" n="291"/>
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7561 <pb file="0291a" n="292"/>
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7562 <figure>
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7563 <caption xml:id="echoid-caption1" xml:space="preserve">Fig: 1.</caption>
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7564 <variables xml:id="echoid-variables1" xml:space="preserve">F G R Y Z S k t g h L H o I E D P T M A C B V X</variables>
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7565 </figure>
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7566 <figure>
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7567 <caption xml:id="echoid-caption2" xml:space="preserve">Fig: 2.</caption>
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7568 <variables xml:id="echoid-variables2" xml:space="preserve">F G R a Y Z i k s g h b L H o I p e D c P T M E C d A V X B</variables>
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7569 </figure>
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7570 <pb file="0292" n="293"/>
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7571 <pb file="0293" n="294"/>
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7572 <pb file="0293a" n="295"/>
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7573 <figure>
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7574 <caption xml:id="echoid-caption3" xml:space="preserve">Fig. 3.</caption>
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7575 <variables xml:id="echoid-variables3" xml:space="preserve">E E T F G H C K I A B</variables>
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7576 </figure>
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7577 <figure>
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7578 <caption xml:id="echoid-caption4" xml:space="preserve">Fig. 4.</caption>
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7579 </figure>
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7580 <figure>
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7581 <caption xml:id="echoid-caption5" xml:space="preserve">Fig. 1.</caption>
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7582 </figure>
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7583 <figure>
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7584 <caption xml:id="echoid-caption6" xml:space="preserve">Fig. 2.</caption>
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7585 <variables xml:id="echoid-variables4" xml:space="preserve">a b C</variables>
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7586 </figure>
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7587 <figure>
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7588 <caption xml:id="echoid-caption7" xml:space="preserve">Fig. 10.</caption>
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7589 <variables xml:id="echoid-variables5" xml:space="preserve">B A</variables>
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7590 </figure>
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7591 <figure>
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7592 <caption xml:id="echoid-caption8" xml:space="preserve">Fig. 20.</caption>
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7593 </figure>
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7594 <figure>
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7595 <caption xml:id="echoid-caption9" xml:space="preserve">Fig. 8.</caption>
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7596 </figure>
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7597 <figure>
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7598 <caption xml:id="echoid-caption10" xml:space="preserve">Fig. 9.</caption>
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7599 <variables xml:id="echoid-variables6" xml:space="preserve">d f e a h c b g k i</variables>
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7600 </figure>
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7601 <figure>
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7602 <caption xml:id="echoid-caption11" xml:space="preserve">Fig. 6.</caption>
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7603 <variables xml:id="echoid-variables7" xml:space="preserve">L N O R P M S</variables>
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7604 </figure>
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7605 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7606 <caption xml:id="echoid-caption12" xml:space="preserve">Fig. 5.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7607 <variables xml:id="echoid-variables8" xml:space="preserve">e f a h d s b</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7608 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7609 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7610 <caption xml:id="echoid-caption13" xml:space="preserve">Fig. 12.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7611 <variables xml:id="echoid-variables9" xml:space="preserve">b z e c d D</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7612 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7613 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7614 <caption xml:id="echoid-caption14" xml:space="preserve">Fig 21</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7615 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7616 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7617 <caption xml:id="echoid-caption15" xml:space="preserve">Fig. 11.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7618 <variables xml:id="echoid-variables10" xml:space="preserve">D C c d</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7619 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7620 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7621 <caption xml:id="echoid-caption16" xml:space="preserve">Fig. 17.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7622 <variables xml:id="echoid-variables11" xml:space="preserve">R S V Y X</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7623 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7624 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7625 <caption xml:id="echoid-caption17" xml:space="preserve">Fig. 15.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7626 <variables xml:id="echoid-variables12" xml:space="preserve">c B A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7627 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7628 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7629 <caption xml:id="echoid-caption18" xml:space="preserve">Fig. 13.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7630 <variables xml:id="echoid-variables13" xml:space="preserve">H F G I</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7631 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7632 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7633 <caption xml:id="echoid-caption19" xml:space="preserve">Fig. 14.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7634 <variables xml:id="echoid-variables14" xml:space="preserve">K</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7635 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7636 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7637 <caption xml:id="echoid-caption20" xml:space="preserve">Fig. 23.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7638 <variables xml:id="echoid-variables15" xml:space="preserve">D I</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7639 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7640 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7641 <caption xml:id="echoid-caption21" xml:space="preserve">Fig. 22.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7642 <variables xml:id="echoid-variables16" xml:space="preserve">A B I K Neg Pos G G H H</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7643 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7644 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7645 <caption xml:id="echoid-caption22" xml:space="preserve">Fig. 19.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7646 <variables xml:id="echoid-variables17" xml:space="preserve">c b d g e f K h I</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7647 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7648 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7649 <caption xml:id="echoid-caption23" xml:space="preserve">Fig. 18.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7650 <variables xml:id="echoid-variables18" xml:space="preserve">a</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7651 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7652 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7653 <caption xml:id="echoid-caption24" xml:space="preserve">Fig. 16.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7654 <variables xml:id="echoid-variables19" xml:space="preserve">O N P</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7655 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7656 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7657 <caption xml:id="echoid-caption25" xml:space="preserve">Fig. 27.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7658 <variables xml:id="echoid-variables20" xml:space="preserve">A B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7659 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7660 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7661 <caption xml:id="echoid-caption26" xml:space="preserve">Fig. 24.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7662 <variables xml:id="echoid-variables21" xml:space="preserve">A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7663 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7664 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
7665 <caption xml:id="echoid-caption27" xml:space="preserve">Fig. 25.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7666 <variables xml:id="echoid-variables22" xml:space="preserve">B A C Pos Neg Pos</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7667 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7668 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7669 <caption xml:id="echoid-caption28" xml:space="preserve">Fig. 26.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7670 <variables xml:id="echoid-variables23" xml:space="preserve">A B C D Neg Pos Neg Pos</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7671 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7672 <pb file="0294" n="296"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7673 <pb file="0295" n="297"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7674 <pb file="0295a" n="298"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7675 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7676 <caption xml:id="echoid-caption29" xml:space="preserve">Fig. 28.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7677 <variables xml:id="echoid-variables24" xml:space="preserve">B D</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7678 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7679 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7680 <caption xml:id="echoid-caption30" xml:space="preserve">Fig. 32.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7681 <variables xml:id="echoid-variables25" xml:space="preserve">G h</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7682 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7683 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7684 <caption xml:id="echoid-caption31" xml:space="preserve">Fig. 34.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7685 <variables xml:id="echoid-variables26" xml:space="preserve">K</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7686 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7687 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7688 <caption xml:id="echoid-caption32" xml:space="preserve">Fig 37.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7689 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7690 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7691 <caption xml:id="echoid-caption33" xml:space="preserve">Fig 39.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7692 <variables xml:id="echoid-variables27" xml:space="preserve">a b c</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7693 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7694 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7695 <caption xml:id="echoid-caption34" xml:space="preserve">Fig 40.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7696 <variables xml:id="echoid-variables28" xml:space="preserve">f g</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7697 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7698 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7699 <caption xml:id="echoid-caption35" xml:space="preserve">Fig. 41.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7700 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7701 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7702 <caption xml:id="echoid-caption36" xml:space="preserve">Fig. 29.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7703 <variables xml:id="echoid-variables29" xml:space="preserve">B C A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7704 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7705 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7706 <caption xml:id="echoid-caption37" xml:space="preserve">Fig. 31.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7707 <variables xml:id="echoid-variables30" xml:space="preserve">E F</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7708 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7709 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7710 <caption xml:id="echoid-caption38" xml:space="preserve">Fig 30</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7711 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7712 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7713 <caption xml:id="echoid-caption39" xml:space="preserve">Fig. 33.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7714 <variables xml:id="echoid-variables31" xml:space="preserve">I</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7715 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7716 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7717 <caption xml:id="echoid-caption40" xml:space="preserve">Fig. 36.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7718 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7719 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7720 <caption xml:id="echoid-caption41" xml:space="preserve">Fig. 35.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7721 <variables xml:id="echoid-variables32" xml:space="preserve">N P L M</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7722 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7723 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7724 <caption xml:id="echoid-caption42" xml:space="preserve">Fig. 42.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7725 <variables xml:id="echoid-variables33" xml:space="preserve">a b c d</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7726 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7727 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7728 <caption xml:id="echoid-caption43" xml:space="preserve">Fig. 44.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7729 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7730 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7731 <caption xml:id="echoid-caption44" xml:space="preserve">Fig. 49</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7732 <variables xml:id="echoid-variables34" xml:space="preserve">e E C M a b H g K L f A D I c d B F G</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7733 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7734 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7735 <caption xml:id="echoid-caption45" xml:space="preserve">Fig. 48.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7736 <variables xml:id="echoid-variables35" xml:space="preserve">F</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7737 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7738 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7739 <caption xml:id="echoid-caption46" xml:space="preserve">Fig. 45.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7740 <variables xml:id="echoid-variables36" xml:space="preserve">f L h g N M</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7741 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7742 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7743 <caption xml:id="echoid-caption47" xml:space="preserve">Fig. 46.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7744 <variables xml:id="echoid-variables37" xml:space="preserve">V</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7745 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7746 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7747 <caption xml:id="echoid-caption48" xml:space="preserve">Fig. 47.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7748 <variables xml:id="echoid-variables38" xml:space="preserve">A B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7749 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7750 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7751 <caption xml:id="echoid-caption49" xml:space="preserve">Fig. 53.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7752 <variables xml:id="echoid-variables39" xml:space="preserve">B F N G B E C D</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7753 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7754 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7755 <caption xml:id="echoid-caption50" xml:space="preserve">Fig. 43</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7756 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
7757 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7758 <caption xml:id="echoid-caption51" xml:space="preserve">Fig 58.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7759 <variables xml:id="echoid-variables40" xml:space="preserve">b c</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7760 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7761 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7762 <caption xml:id="echoid-caption52" xml:space="preserve">Fig. 38.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7763 <variables xml:id="echoid-variables41" xml:space="preserve">K T s r</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7764 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7765 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7766 <caption xml:id="echoid-caption53" xml:space="preserve">Fig 50</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7767 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
7768 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7769 <caption xml:id="echoid-caption54" xml:space="preserve">Fig 51.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7770 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7771 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7772 <caption xml:id="echoid-caption55" xml:space="preserve">Fig 52.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7773 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7774 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7775 <caption xml:id="echoid-caption56" xml:space="preserve">Fig. 54.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7776 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7777 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7778 <caption xml:id="echoid-caption57" xml:space="preserve">Fig 55.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7779 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7780 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7781 <caption xml:id="echoid-caption58" xml:space="preserve">Fig 56.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7782 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7783 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7784 <caption xml:id="echoid-caption59" xml:space="preserve">Fig 57.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7785 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7786 <pb file="0296" n="299"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7787 <pb file="0297" n="300"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7788 <pb file="0297a" n="301"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7789 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7790 <caption xml:id="echoid-caption60" xml:space="preserve">Fig. 59.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7791 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7792 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7793 <caption xml:id="echoid-caption61" xml:space="preserve">Fig. 60.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7794 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7795 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7796 <caption xml:id="echoid-caption62" xml:space="preserve">Fig. 61.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7797 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7798 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7799 <caption xml:id="echoid-caption63" xml:space="preserve">Fig. 62.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7800 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7801 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7802 <caption xml:id="echoid-caption64" xml:space="preserve">Fig. 63.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7803 <variables xml:id="echoid-variables42" xml:space="preserve">B A a b c d e f C</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7804 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7805 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7806 <caption xml:id="echoid-caption65" xml:space="preserve">Fig. 66.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7807 <variables xml:id="echoid-variables43" xml:space="preserve">e d b a</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7808 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7809 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7810 <caption xml:id="echoid-caption66" xml:space="preserve">Fig. 68.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7811 <variables xml:id="echoid-variables44" xml:space="preserve">i h G F H</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7812 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7813 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7814 <caption xml:id="echoid-caption67" xml:space="preserve">Fig. 64.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7815 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7816 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7817 <caption xml:id="echoid-caption68" xml:space="preserve">Fig. 63.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7818 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7819 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7820 <caption xml:id="echoid-caption69" xml:space="preserve">Fig. 69.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7821 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7822 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7823 <caption xml:id="echoid-caption70" xml:space="preserve">Fig. 70.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7824 <variables xml:id="echoid-variables45" xml:space="preserve">A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7825 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7826 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7827 <caption xml:id="echoid-caption71" xml:space="preserve">Fig. 71.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7828 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7829 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7830 <caption xml:id="echoid-caption72" xml:space="preserve">Fig. 73.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7831 <variables xml:id="echoid-variables46" xml:space="preserve">B A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7832 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7833 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7834 <caption xml:id="echoid-caption73" xml:space="preserve">Fig 72.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7835 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7836 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7837 <caption xml:id="echoid-caption74" xml:space="preserve">Fig 67</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7838 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7839 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7840 <caption xml:id="echoid-caption75" xml:space="preserve">Fig. 77.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7841 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7842 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7843 <caption xml:id="echoid-caption76" xml:space="preserve">Fig. 74</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7844 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7845 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7846 <caption xml:id="echoid-caption77" xml:space="preserve">Fig. 75.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7847 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7848 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7849 <caption xml:id="echoid-caption78" xml:space="preserve">Fig. 76.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7850 <variables xml:id="echoid-variables47" xml:space="preserve">O E F C D H T K M P N A B A B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7851 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7852 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7853 <caption xml:id="echoid-caption79" xml:space="preserve">Fig 78.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7854 <variables xml:id="echoid-variables48" xml:space="preserve">F D E A O B C G n g</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7855 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7856 <pb file="0298" n="302"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7857 <pb file="0299" n="303"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7858 <pb file="0299a" n="304"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7859 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7860 <caption xml:id="echoid-caption80" xml:space="preserve">Fig. 80.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7861 <variables xml:id="echoid-variables49" xml:space="preserve">D B F A C I H E T G K L</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7862 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7863 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7864 <caption xml:id="echoid-caption81" xml:space="preserve">Fig. 87.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7865 <variables xml:id="echoid-variables50" xml:space="preserve">A B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7866 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7867 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7868 <caption xml:id="echoid-caption82" xml:space="preserve">Fig. 85.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7869 <variables xml:id="echoid-variables51" xml:space="preserve">F E G H L D K C I</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7870 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7871 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7872 <caption xml:id="echoid-caption83" xml:space="preserve">Fig. 86.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7873 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7874 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7875 <caption xml:id="echoid-caption84" xml:space="preserve">Fig. 81.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7876 <variables xml:id="echoid-variables52" xml:space="preserve">F D E T C B A G L</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7877 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7878 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7879 <caption xml:id="echoid-caption85" xml:space="preserve">Fig. 93.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7880 <variables xml:id="echoid-variables53" xml:space="preserve">B A A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7881 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7882 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7883 <caption xml:id="echoid-caption86" xml:space="preserve">Fig. 84.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7884 <variables xml:id="echoid-variables54" xml:space="preserve">L M</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7885 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7886 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7887 <caption xml:id="echoid-caption87" xml:space="preserve">Fig. 94.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7888 <variables xml:id="echoid-variables55" xml:space="preserve">A b a B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7889 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7890 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7891 <caption xml:id="echoid-caption88" xml:space="preserve">Fig. 89.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7892 <variables xml:id="echoid-variables56" xml:space="preserve">a c e d</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7893 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7894 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7895 <caption xml:id="echoid-caption89" xml:space="preserve">Fig. 90.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7896 <variables xml:id="echoid-variables57" xml:space="preserve">a</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7897 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7898 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7899 <caption xml:id="echoid-caption90" xml:space="preserve">Fig. 82.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7900 <variables xml:id="echoid-variables58" xml:space="preserve">b d e c f b</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7901 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7902 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7903 <caption xml:id="echoid-caption91" xml:space="preserve">Fig. 95.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7904 <variables xml:id="echoid-variables59" xml:space="preserve">N Y F B V C D O I G X Z L z K Q T F H U G R S</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7905 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7906 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7907 <caption xml:id="echoid-caption92" xml:space="preserve">Fig. 83.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7908 <variables xml:id="echoid-variables60" xml:space="preserve">b c d f</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7909 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7910 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7911 <caption xml:id="echoid-caption93" xml:space="preserve">Fig. 92.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7912 <variables xml:id="echoid-variables61" xml:space="preserve">K</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7913 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7914 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7915 <caption xml:id="echoid-caption94" xml:space="preserve">Fig. 96.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7916 <variables xml:id="echoid-variables62" xml:space="preserve">G A C D B</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7917 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7918 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7919 <caption xml:id="echoid-caption95" xml:space="preserve">Fig. 88.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7920 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7921 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
7922 <caption xml:id="echoid-caption96" xml:space="preserve">Fig. 106.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7923 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7924 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7925 <caption xml:id="echoid-caption97" xml:space="preserve">Fig 91.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7926 <variables xml:id="echoid-variables63" xml:space="preserve">m n b L K N B a s D g A g F R</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7927 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7928 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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parents:
diff changeset
7929 <caption xml:id="echoid-caption98" xml:space="preserve">Fig. 98.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7930 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7931 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7932 <caption xml:id="echoid-caption99" xml:space="preserve">Fig. 88.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7933 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7934 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7935 <caption xml:id="echoid-caption100" xml:space="preserve">Fig. 97.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7936 <variables xml:id="echoid-variables64" xml:space="preserve">F H K L f k</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7937 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7938 <pb file="0300" n="305"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7939 <pb file="0301" n="306"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7940 <pb file="0301a" n="307"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7941 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7942 <caption xml:id="echoid-caption101" xml:space="preserve">Fig 100.</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7943 <variables xml:id="echoid-variables65" xml:space="preserve">E D A B C</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7944 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7945 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7946 <caption xml:id="echoid-caption102" xml:space="preserve">Fig. 99</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7947 <variables xml:id="echoid-variables66" xml:space="preserve">E D B a a A m b b b m m a a C c F</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7948 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7949 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7950 <caption xml:id="echoid-caption103" xml:space="preserve">Fig. 103</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7951 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7952 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
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diff changeset
7953 <caption xml:id="echoid-caption104" xml:space="preserve">Fig. 101</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7954 <variables xml:id="echoid-variables67" xml:space="preserve">H K G I A B F F C D</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7955 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7956 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7957 <caption xml:id="echoid-caption105" xml:space="preserve">Fig. 104</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7958 <variables xml:id="echoid-variables68" xml:space="preserve">b a B A</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7959 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7960 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7961 <caption xml:id="echoid-caption106" xml:space="preserve">Fig. 102</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7962 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7963 <figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7964 <caption xml:id="echoid-caption107" xml:space="preserve">Fig. 105</caption>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7965 <variables xml:id="echoid-variables69" xml:space="preserve">B D</variables>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7966 </figure>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7967 <pb file="0302" n="308"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7968 <pb file="0303" n="309"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7969 <pb file="0304" n="310"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7970 <pb file="0305" n="311"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7971 <pb file="0306" n="312"/>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
parents:
diff changeset
7972 </div></text>
22d6a63640c6 moved texts from SVN https://it-dev.mpiwg-berlin.mpg.de/svn/mpdl-project-content/trunk/texts/eXist/
casties
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diff changeset
7973 </echo>