19(5 DE CRlTi.RlIS INTEGRABILIT. 



P— 0, binc aiucm ifu iniT» dcdiicitur aeqviatio : 



Ponamus nutrc (p = Cp' >4/ , vbi Cp' deooMt fiinaio- 

 nem (btiim .v inuoluciitcni , ^ ■Mmm talcm qu:ie 

 •vtramque .v et j continet , atquc ob 



liis \aloribus in acquatione ruperiuri fubditucis coa- 

 fequimur : 



Nunc fiicilc quidem apparet , hanc acquationcm iii 

 duas di(pe(ci pofle partes , quarum vtraque cuanefce- 

 rc debet , erit fcilicct 



I. (p'v-^-^^- = o et II. i'/^)iyv^zyili] = o, 



cx priori ftatim deducitur Cp' — i?-^'"' *, quod autera 

 poderiorem attinet , facile licjuet v|y habere deberc 

 hutusmoii formam rif/S-hT), dcfignantibus S 

 et r fundioiies quasdam Iblius variabilis .v. Fict 

 Tcro indc 



(i±)=^r':iyS + T) et i'^-j=:i'-/^'+'-^)r>:iyS + T) 

 hinc cr^o pmdibit 



Sij.-^z)~y^^-i^ = o, 

 idcoquc S V - i|- - o ct S s - ^^-I = o , 

 yndc dcducitur 



l^ — ^fvd. ^j T^fSzdx^fe^^^^^^zdx, 



m 



ulti- 



