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#Mon Aug 09 11:49:32 CEST 2010
Slide__Vk3skKObEd-WfYQ0GneCwQ_title=
Slide__Vk3skKObEd-WfYQ0GneCwQ_subTitle=Behavior of the Compass Needle around the Terrella
Slide__Vk3skKObEd-WfYQ0GneCwQ_footer=Athanasius Kircher\: De Arte Magnetica, 1641