RT @hist_astro: OPERATIONS OF THE GEOMETRIC AND MILITARY COMPASS OF GALILEO GALILEI, 1606. PDF, English trans: brunelleschi.imss.fi.it/esplora/compas… http://t.co/aX0FJc94Hi
RT @hist_astro: OPERATIONS OF THE GEOMETRIC AND MILITARY COMPASS OF GALILEO GALILEI, 1606. PDF, English trans: brunelleschi.imss.fi.it/esplora/compas… http://t.co/aX0FJc94Hi