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#Mon Aug 09 11:49:32 CEST 2010
Text__Qnl6QKObEd-WfYQ0GneCwQ_title=Barlow\u2019s Sphere
Text__Qnl6QKObEd-WfYQ0GneCwQ_text=<p>After the discovery of induction, Peter Barlow criticizes the comparison of the Earth with a permanent magnet. His model of the Earth   (around 1840) is a spherical coil with current flowing through it. Barlow believes that magnetism <q>has no real existence.</q></p>