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#Mon Aug 09 11:49:32 CEST 2010
Slide__WxZxIKObEd-WfYQ0GneCwQ_subTitle=The determination of the Earth's magnetic field is of enormous importance for seafaring navigation.
Slide__WxZxIKObEd-WfYQ0GneCwQ_title=
Slide__WxZxIKObEd-WfYQ0GneCwQ_footer=Jan van der Straet (Stradanus)\: Nova Reperta, 1584