ius CF, fradio fie fe habebit. Centro F &:intervallo FC defcribantur duo circuli quadrantes ACIquidem intra aërem, KG4 autem intra vitrum , ira utjrecla IFK fit diameter ad fuperflciem AB perpendicula-jis , &: quadrantes habeant angulos AFI, KF4 rcdos,jad verticem oppofitos ; quo pado illi… … Si igltur radins CF fradus non efTet in F , ille rcdàprogrederctur in G; at propccr fraftioncni fit concià, iicdeviec abipfa rcditudincCFG , Hacque CFH ex duabiisredis CF ,FH angulum obtufum ad F conftitucntibus,fie ut intra aërcm angulus inclinationis CFI major fiEquàm angulus HFK qui cfl: quoquc…
Geometry · Mathematics
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