1in lineà ae minus inclinatà, minùs autem velociter in li
neà ad magis inclinatà, eſſeque; rationem velocitatis in ae
ad velocitatem in ad, ut ſinus anguli ats ad ſinum angu
li atr. Ex punctis contactus qrs demittantur lineæ
perpendiculares qt.rt.st: & aliæ lineæ perpendiculari at
15[Figure 15]
parallelæ qg.rh.si ſecantes mobile in k. n. u, ex centro au
tem o ducantur lineæ perpendiculares ad lineam hypo
mochlij οα. οβ. ογ, eruntque; lineæ qg. rh. si lineæ hypo
mochlij. Quia verò angulus tsi, hoc eſt angulus sh
neà ad magis inclinatà, eſſeque; rationem velocitatis in ae
ad velocitatem in ad, ut ſinus anguli ats ad ſinum angu
li atr. Ex punctis contactus qrs demittantur lineæ
perpendiculares qt.rt.st: & aliæ lineæ perpendiculari at
15[Figure 15]parallelæ qg.rh.si ſecantes mobile in k. n. u, ex centro au
tem o ducantur lineæ perpendiculares ad lineam hypo
mochlij οα. οβ. ογ, eruntque; lineæ qg. rh. si lineæ hypo
mochlij. Quia verò angulus tsi, hoc eſt angulus sh
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