Ioan. Baptistae Portae neap. De refractione optices parte, libri nouem (1593)
Porta, Giambattista della, approximately 1535-1615 · Neapoli : Ex officina Horatij Saluiani : Apud Io. Iacobum Carlinum, & Antonium Pacem · leaf 69
DE PII AE CRYST. REF. LIB. IX. Tila cryJlallinaScli cppcfitaigntm accendit prope pilani. *Frcp. XXII . RADII perpendiculares fupremam extimam pilae fuper- ticiem inuadentes, refranguntur,vt diximus, & egredien- tes etiam refranguntur denuo , vnde decutiantur prope pilam, in decutiationibus igitur… … SintradiJ aequiditiantesSoIis extimam pilae fuperficieniin- uadentes ABCDEFG. Radi) B F » qui latera egaxoni tan¬ gunt» refranguntur ad calcem diametri DI, per fecundam,ra- di j item AG»quia latera pentagoni tangunt» refranguntur in¬ tra pilam M N , & hi funt inutiles ccmbuftioni, radi) vero» qui…
Optics
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Perspective cilindriqve et coniqve; ov, Traicte' des apparences veuës par le moyen des miroirs cilindriques & côniques, soient conuexes ou concaues; ensemble la construction & position des figures obiectées au [sic] mesmes miroirs, afin que leurs apparences soient conformes à la volonté (1630)](https://img.insideoutlibrary.com/img/200/ia-perspectivecilin00vaul-72-16.webp)
