RT @hist_astro: Latin, Hebrew & Greek alphabets & early camera obscura. ‘Ars magna lvcis et umbrae…’ by Kircher 1646 @BeineckeLibrary http://t.co/BeR27R4MLA
RT @hist_astro: Latin, Hebrew & Greek alphabets & early camera obscura. ‘Ars magna lvcis et umbrae…’ by Kircher 1646 @BeineckeLibrary http://t.co/BeR27R4MLA