vel tranfitvelnon tranfit ac redit,unde dividendumprimolumen intranfiens vel rediens. Tranfieriseft,quod a corpore lucido peraperros diaphani corporis akerius fcil. obvii poros propellicur, cftque direclumvel refraclum. Direclum dicecur, cumi>erpendicularicer incidens in corpusdiaphanum per… … JL eft,ncmpedefcenforia,undepcr illarft folampropcllitur,nec alio defledijnecinfringi aut incurvari poteft^ Tranfiens refrac^um eftjquod ex incidentia obliqua ad occurfum diaptiani Tranfiessfradalinea,cum angul® ncmpc adpunclum ingrelfus fadoperipfumdiaphanum rcflj^u«>propellitur. Sicut in…
Optics, Geometrical · Optical instruments
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-321-212.webp)