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Perspectiua horaria, siue, De horographia gnomonica tum theoretica, tum practica libri quatuor ... (1648)

Maignan, Emmanuel, 1601-1676 · Romae : Typis & expenses Philippi Rubei · leaf 782

An illustration from Perspectiua horaria, siue, De horographia gnomonica tum theoretica, tum practica libri quatuor ..., 1648, leaf 782
Dioptricc Horaria^s. 66$ Tantum nunc addo , centrum etiam refradum Capricorni diuerfunu efle a centro eiufdem in loco vero . Si enim diuidatur arcus XDY, fi ue N D O bifariam in K ; & ex K per centrum A , ducatur recta K A JE , fe- cansXY in L, & VT in I ; hxc erit axis Aquatoris, & punctum I erit… … gulo inclinationis DA K graduum ex lacta hvpothcfi 48 ; angulus refrac¬ tus ipfi per 48 huius relpondens, erit grad. 3 3 min. 30 vt E A Qj^quo poli¬ to erit A Q axis Asquatoris refractus ; qui fi diametrum refractam Capri¬ corni, fecet in R ; dabit in communi ledione pundum R tanquam cen- trum…

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.

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