J28 DE METnODO 



Ppnamus crgo pprro /L dx zzW et /L i' </a'~T , 



eritque 



— /T </a:; n^/ -■+- p<5/) H- <1(J ^-i- V^^-f- etc.) 



-j\dxSj[m-inrJ vva-J/^^ ip)-/\v/a<j^(a-iq]etc 



His igitur omnibus coUigendis" prodjbit vaiiatio difFeren- 

 tialis quaefita 



^y z^.Y=: T/^.v f n (^ j ^ p <^ /) -f- (^ q </ H- r ^ r -i- etc.) 

 ^ v/^A- ^ j ( 9^ - 1 n )+ yjdxs p{^-r.-p) 



-4- V/ ^x <^ ^ ^Q -- 1' q ) etc. 



^-V/(/.r«^j(N-V9?H-Vi;n-Tn) 

 ^/rt'x^/)(P-V^>-f-Vi'p-Tp) 



-^jdxS ^(Q-va-i-v-yq-Tq) 



ctc. 



quae cnm ad terminum vsqiie .v~<? extendi debeat , 

 ponamus integralia JLdxzzV^ ti jLdxj^dx — T ^ 

 quandoquidem determinatio integrationis nollro arbitrio 

 relinquitur , ita capi, Yt euanelcant, pofito xzza\ quo 

 noftra expreflio fiicilior reddatur. Deinde verp pona- 

 inus breuitatis gratia : 



ISI_v9?H-(ya;-T)n=r(N) 

 P-V^H-lV-y-TJp — (P) 

 q-Va-f-^V-y-Tjq^^Q^) 



etc. 



cxiflente 



