uctis . Sit fpeculi cylindrici A B, axis C D, & fediio oxygonia F E I, in quam ab vno quouis pundto lucido O plurimi radij cadant , a qua & refledtan- tur. Suppofito verticem lectionis E, eflfe in plano per O , & per axem D, atque etiam per maximam lectionis diametrum H E incedente, fuman¬ tur duo… … Dico reflexionum plana duo, in quibus funt duo radij O F, O G , fe fe mu¬ tuo lecare in quadam redfa ab O per cylindri axem C D ductam. Si enim in punctis F, G,axes reflexionum F P,GN erigantur & mox intra lpecu- lum producantur i hi axem C D in vno eodemque p untio fecabunt periri-
Sundials -- Early works to 1800 · Horology -- Early works to 1800 · Perspective -- Early works to 1800 · Horology · Perspective · Sundials
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
