i 98 Philosophie Naturalis

Co!fpT PROPOSITIO XXXV. THEOREMA XI.

RDM.

Iisdem positis, dico quod area figurce DES, radio indefinito SD des-cripta, (cwa'is ßt arere quam corpus , radio dimidium lateris restifigurer DES requante , circa centrum S uniformiter gyrando , eodemtempore describere potes .

Nam concipe corpus C quam minima temporis particula li-neolam Cc cadendo describere, & interea corpus aliud K , uni-formiter in circulo OKk circa centrum S' gyrando, arcum K kdescribere. Erigantur perpendicula C D , c d occurrentia figu-ra? DES in D , d. Jungantur SD, Sd , SK, Sk & ducaturD d axi AS occurrens in T , &: ad eam demittatur perpen-diculum S Y.

Caf. i. Jam si figura DES circulus est vel hyperbola rec-tangula, bisecetur ejus transversa diameter A S m 0 y 6c erit