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1.6.11. 2 t æqualis arcui K li, erit arcus yn qualis

PT OLE M AE I 21a b g d circa centrum e: axis linea bed: dia-meter circuli æquinoctialis linea ag: diame-tri circulorum æquidiſtätium zodlaco line æ2h& t k. producentur& lineæ diz, d mh,dat, de x. deſignamus deinde circa trian-gulum q ne circulum d y f, producta y f. de-inde deuidemus lineam im per mediũ apudpunctum o. Cum ergo conſtaus ſit en ancirca diametrumꝝ h, deſcribi poſſe circa dia-metruml mʒ ſicq́; an e circa diametrumt K, deſcribi poſſe circa diametrum nc. Di-co hos duos circulos nequaquaꝶ eſſe eiuſ-dem centri: id eſt punctum o in diametro neminime medium eſſe. Quoniam enim arcus

arcui cf: unde ſineæ A HV. æquidiſtanteęs.Ergo quæ proportio lineæ dlad ly, eadem linee A rache ed quæp roportio lineæd lac lineam ly, eadem linea in fe ductæ addLind date eademqʒ lineæ dm in ſe ductæad d m in mf ductani quæ din ad m 5proportio. Quoniam itaque loco circul i d!

in ly æqualis eſt Ic in ln: ſicq́; mn d in mf, æ-

qualis mu in m: eritq́; proportio dl in ſeductæ ad clin In: eademq; lineæ ꝗᷓ m in ſeip-4 ſarn