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#Mon Aug 09 11:41:20 CEST 2010
Slide__KCJswKOaEd-WfYQ0GneCwQ_footer=Ren\u00E9 Descartes\: Principia philosophiae, Amsterdam 1644
Slide__KCJswKOaEd-WfYQ0GneCwQ_title=Matter Vacuum Matter Plenum
Slide__KCJswKOaEd-WfYQ0GneCwQ_subTitle=Pressure of Particles as Explanation of the Propagation of Light