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 15
DE REFRACT. LIBER I. 9 … Efto peluis CDEFGH, aftrolabium ALBI, tranfeat aqua per medium aftrolabij, fcilicet per vmbilicum O, fit regula AB perpendiculariter fuper aquam ereda , & tranfeat lumen per A tranfibit per A O B: robuftum, tantum enim eft illi virium, vt a vehementifsimo aquae occurfu defledi non pofsit . At fi…
Optics
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
