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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 119

An illustration from Ioan. Baptistae Portae neap. De refractione optices parte, libri nouem, 1593, leaf 119
per cenacula, aut dor- mitoriacsenobiorum , aut per regias aulas , quum videant funi- ma laquearia magis defcendere , quam pauimenta afccndere , apponere confiituimus. quod .non alia euenit ratione ,nifi quia . afpicientes oculorum aciem figant in oppofito pariete ad fui corporis altitudinem, &… … Sit oculus S ,&vbi aciei mueronem diriget in oppoiito pariete ibi pone lineam A, & ab oculo Stranfiierfam lineam ducito S A Parallelus longe a vertice fuperius diftans fiue redum fit RP propinquior,fiueplanitiesF H. Defcendat fatis oblique R pan¬ dus ad oculum V S> refrangetur, & occurret catheto…

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Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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