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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 174

An illustration from Perspectiua horaria, siue, De horographia gnomonica tum theoretica, tum practica libri quatuor ..., 1648, leaf 174
gnoraretur poiTet error in operatione contingere ; fiquidem Sol eil kl parte qui vmbri opponitur ; vt pofica vmbra E H (in priori fiaura ) Sol elt in parte EL ; & quia ex hypothefi cognofco lineam E L ( qui , vt dixi, eft lpla H E producta ) ede in parte occidentali , idcirco arcum a c, & an¬ gulum… … STylo E F per t huius ad angulos rectos erecto , deferipta autem per quintam linea Horizontali K EG, ac per 6 Verticali L E P ; £t oblerua- tum vmbri extremi punctu quodlibet H in pariete : per H igitur incedit circulus Verticalis, in quo Sol verfatur, dum a ftyli vertice vmbraproijci- tur F H.…

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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