# #Mon Aug 09 11:49:32 CEST 2010 Slide__QnLDgKObEd-WfYQ0GneCwQ_subTitle=Peter Barlow's Model of the Earth as an Electromagnet, C. Dell\u2019Acqua, Milan, around 1840 Slide__QnLDgKObEd-WfYQ0GneCwQ_title=Barlow\u2019s Sphere Slide__QnLDgKObEd-WfYQ0GneCwQ_footer=On loan from\: Museo per la Storia - Universit\u00E0 di Pavia