8112/12453
[ stop the slideshow ]

Hadley's Sextant

Hadley's Sextant.jpg HipparchusThumbnailsGalileo and the Well-sinkersHipparchusThumbnailsGalileo and the Well-sinkersHipparchusThumbnailsGalileo and the Well-sinkersHipparchusThumbnailsGalileo and the Well-sinkersHipparchusThumbnailsGalileo and the Well-sinkers