frnus arcus K E, ad L Qfinum arcus E F in hac r^fracftione j ita 5ein alia. At IC Y eft etiam frnus anguli in¬ clinationis > Si LQeft etiam frnus anguli refrati i igitur &c. demonftra- tur autem hoc fupfumptum fre. Centro F, interuallo F K deferibatur arcus K Z , fecans M E produtam in Z; erit ergo… … quia hi arcus per conffruclionem funt circulorum squalium , cum frnt def- cripti ad squales femidiametros E L, K F ; lequitur iplbs K Y,LQie habe¬ re vt frnus ad linum in eodem circulo. Et quia ex demonferatis angulus Y FK(feuEFK) squalis eft angulo inclinationis S F Djfequitur K Y efte fi- num…
Sundials -- Early works to 1800 · Horology -- Early works to 1800 · Perspective -- Early works to 1800 · Horology · Perspective · Sundials
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