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
![](https://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler?fn=/permanent/archimedes/marci_regul_062_la_1639/062-01-figures/062.01.045.1.jpg&dw=200&dh=200)
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