35<J D E M O T V 



vbi foret dcnfitas r: i et amplitiido =jf > celeritatc 

 zz. V , haec inuenta fit aequatio 



his intcgralibus per totum circulum extenfis fingnla 

 feorfim euoluamus. Ac primo quidem ob ^zi^fin.Cp 

 et d q zz a d (p fin. <$) erit 



/zdq-acfd(pCin. <p"-'^oLcfd (p{i-coC 2Cf))riar($-ifin. sCJ)) 

 cuius valor per totum circuhim ponendo (^ zz: z i: 

 cxpanfum praebet fz d q zz ix a c, Deinde ob d s 

 tf-^Cj) et w :=/(! -(3fin. Cf)) fit 



//i:=^/n^.^= v-:^) ( A^^S. fm. y ( I ^ p p) 



-Ang.fm.-^i^O. 

 Sit >4y angulus ifte cuius fmus eft '^l^^.-^^ , et 

 pofito (pzz.90' fit v|y — o, pofito autem CpiZTrfit 

 vpni-Ang.fin.y^i-pp) 



pofito porro Cj)— 270° fit v(yzi: — tt, pofito denique 

 Cp zr 2 TT colhgitur 



vpii:— 2 TT H- Ang.fin. y (i - P|3) , 



ex quo pro toto circulo fit fff^zn—}'^^^ quod 

 idem clarius fit fi (3 vt valde paruum fpedemus , 

 tum enim erit 



/--||-^=/^Cl)(i+pfin.(p)~Cl)^(3co(.C|>4-(3, 



cuius valor pofito Cf)=r27r fit —^tt. Pro tertia 

 formula integrali ob d oi zz — ^ ffd(pco[, Cj) et 

 ^ = 1 - a cof. Cp erit 



r/ 



