Primitiae gnomonicae catoptricae, hoc est, Horologiographiae nauae specularis ... (1635)
Kircher, Athanasius, 1602-1680 · Auenione : Ex typographia I. Piot ... · leaf 100
84 … pecun, raciunt raaij airecti oc renexi , enc «cqu.*- es. tantum enim eft angulus , V G. C A D vmbro iis ob gnomonem O A, quantus angulus reflexio- iis B A C, quem facit lumen incidens in A /pecu- um loco apicis gnomonis collocatum , quod nc >ftendo , quia enim, cumlux E in A apicem gno- onis…
Sundials
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Les mechaniqves de Galilée ... : avec plvsievrs additions rares, & nouuelles, vtiles aux architectes, ingenieurs, fonteniers, philosophes, & artisans / traduites de l'italien par L.P. M[arin] M[ersenne] (1634)](https://img.insideoutlibrary.com/img/200/ia-lesmechaniqvesde00gali-97-0.webp)
