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 19
lucis cognata motui , quod & in alijs Natura? operibus conuifitur, & id quoque inftrumentis ad id opus concinnatis rimatum efl. Mergatur aftrolabium cen¬ tro tenus in pefiii aqua plena ,& deorfum foramini coloratum opponatur, fi centro obflacuium aliquod opponatur, peribit vi fio,a re enim ad… … In
Optics
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Vnderweysung der Messung : mit dem Zirkel vn[d] Richtscheyt in Linien, Ebnen vnnd gantzen Corporen (1525)](https://img.insideoutlibrary.com/img/200/ia-vnderweysungderm00drer-116-229.webp)
