Primitiae gnomonicae catoptricae, hoc est, Horologiographiae nauae specularis ... (1635)
Kircher, Athanasius, 1602-1680 · Auenione : Ex typographia I. Piot ... · leaf 77
SI SOL PE? CIRCVLVM AEQVATO ~ ri parallelum incedat ■> fit que planum in quod ojmbra gnomonis , aut reflexus radius incidit , circulo maxi- , parallelum , erit pro- mo j vtrumque conum flecanti iecla centri vmbraflcut & lux reflexa hyperbole. … Cti , alter luminofus D A E,vmbrofus alter F A G> quos maximus circulus M N. fecet. /it autem huic circulo maximo M N planum horologij I L , pa- rallelum.Dico iphus I L plani & coni vmbroh F A G feCiionem H S K, Hyperbolen effe. Nam quo- niam parallela plana M N, & I L plano fecantur D E G F, erunt…
Sundials
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Epistole Heroides Publii Ouidii Nasonis : dilgenti castgatione exculte, aptissimisq[ue] figuris ornate (1536)](https://img.insideoutlibrary.com/img/200/ia-epistoleheroides00ovid-200-1.webp)
![An illustration from Perfacilis, breuis, et expedita ratio componendi symphonias, co[n]centusue musicos (1585)](https://img.insideoutlibrary.com/img/200/ia-perfacilisbreuis00hitz-23-1.webp)
![An illustration from Aureum vellus, oder, Guldin Schatz und Kunstkam[m]er : darinnen der aller fürnemisten, fürtreffenlichsten, ausserlesenesten, herrlichisten vnd bewehrteste[n] Auctorum Schrifften vnd Bücher, auss dem gar vralte[n] Schatz vberblibnen verborgnen, hinderhaltenen Reliquien vnd Monumenten der Aegyptiorum, Arabum, Chaldaeorum & Assyriorum Königen vnd Weysen (1598)](https://img.insideoutlibrary.com/img/200/ia-aureumvellusoder01tris-209-0.webp)
