Si ininc centro O radio O M defcriptus intelligatur arcus 

 Mi?, qui ponaturr </«, exi([cnte m e - d Zy erit ob </vL>-<'_i- 

 » d \\/ - d u =: d s proxime j tumque ob (Jy-) -z {^-^) fiet: 

 (jf) = -(jf)cor.vl>4-(Jf)fin.vl., et'' 



(if) = (.^)fi"-^+('-r)co^^- 

 Hinc fi ftatuatur ( —) zz: o , fict 



vnde vero denuo difFerentiando elicitur: 

 (l7^") = -('^)cof.v|/j et 



' ('-^) = -('^)^^n-^- 

 His igitur valoribus in aequationibus T. et II. fubftitutis , 

 iftae aequationes ita habentur transformatae: 



(J-D-^-V(j-?) = ,-^(^)(cof.Cpfin.v].-fin.Cj5conv|/) 



- P fin. (p - Q cof. ^ 



-Q(cof.vH-(f-f)fin.vi.)j ob 



fin. ^p zz cof. X M O — cof. nI> = fin. X M O , 



hincque 



cof. <p fin. v}y - fin. (p cof v^ — cof. A M O r: (if ). 



Simili modo fiet, ob 

 ' fin. AMO =fin.(J)fin.vly4-cof. vI/cof.Cp-(2-^)r= i; . 



(1Y)_T(^) — - (i^)(cof.(f^cof. vl>-i-fin.Cpfm.vly) ' 



-Qfin.Cp + Pcof.Cp 



^-P(fin.vp-(J-f)cof.vl.), 



Quod 



