•^^.1 ) pi ( v?%<^ 



noftros I. vel III, ftatuendo e—ij tum vero fit 



dz d(p d (P 



, vbi 



y ( I + « 2; s ) y 2 « ( I H- cof. (p ) "" 2 y w. coi; i (p ■ 



Tum difFerentiale y^ ^l^lizz) P^'' ^ormulas V. et VI. ex- 

 peditur, pofito ^ — o, (vid. §. 11. vel 12,) eritque 



V(i— niz) H-Vn^' 



prouti ponatur z vel =:-^^ vel z — ^-^ . Denique dif- 

 ferentiale ,, ^^ — r per Formulas noftras IX. et X. ex- 

 peditur §. 22, Ybi ^ — i , eritque 



dz I . d(^ __ d(^ 



y{nzz- i) ~~ y~n ' y2(i4-cor.Cp) "" 2y«.cof.^Cp' 

 pofito 



y 2 I 



z 



y « ( I + cof <p) — yn. cof 5 Cp* 



f. 30. Formulae hucusque confideratae facile ex- 

 pediuntur, maius autem negotium facefcunt, illae, pro qui- 

 bus ftatuitur fiue tn, feu n infinito aequale, quae fequcn- 

 tes funt! 



<i^y (i ^ tnzz); ^-^y {i~-mzz)'j 



~y {m z z— 1) pofito « zr 00. 



5_^z . * d z ^ zdz r\r^r,tn m y^ 



V(.-4-nz2} ' V ( ■ — ~aTr ' V(Ti2z_ i) ' po^tO W — OO, 



Si primum horum differentialium ad Formam IX. §. 22. 

 reducere vellemus , confequeremur ^ ~ i , tum vero efle 

 deberet: 



z — ^V* -!_,, ,, Vi 



V ( < -^ coj. $ > — y /i ( i -+- w/. $ } » 



quod 



