AT:=y~, et relatio propofita haec: R M rs A M/ - Pofit-i 

 anguio A M R = vjy, et M ^j, ad A M> A w, normali, efi£ 7 



AmR— v|/-f-av|/, M ^zi=/(a^-i-iaa:;2), 

 atque >4^ zz; M A T, ideoque 



tang v(. = i:i^^>, cof v{. zri JL 3 6t 



3 . tans; \b = x(ydx-xdy) 



unde fit 



a v|y =1 cof2 viy d . tan^ vp = y^«-«9y, ^ 



Quare cum fit 



AOR — ^-f^i5Am^vP-Ha^--hMR^y et 



M A m ==: Hi!: — - /o s^ — dx^) 



A AI X * 



pofito M R m ~ 3 (J), habemus 



« XV(X2 ^") ' 



ae aequatio quomodo integrari poffit, hi^ j/ (^ ^ y-. g' ^fe») 

 eliminetur, non video. Cum autem fit 



\jv = pc^ — R M ^ — m M /i , erit 

 tansr vb zn - — if , 



quare cum fuprd invenimus 

 tahg v|y izz' lk£lp2LL , 

 iiancifcimur 



quo valore in aequatione priore fubftituto hafeem^ 

 yeium ex aequatione 



^^- — ax-z=^i£i fit a^zz—^g^ ; 



Cc a quo 



