J^' AKALTSl INFINirORVM, 137 



Porro eft fp(fii = r ~ d^^^^d^n - M, et 

 Jpp c/u =: '-^^ — ■ ^^j^j loJyi - 2 N ^ ergo 



TJW^dH j^ dM(dN' — rf M»)_ .. 



X dM.irfN — JMddM - ^''- ) J' ^MdUN — .iNdrfM ^ iM 



<:( M(rfN'-f-iM') TVT 



atqiie z zz djrd-dN^lNridM - ^ N. 



Si elementiim /3' M fiimatur couftans, ^rit 



jdMdN ,, 



X^ -dlH- -- 2M 



dN' — dJl» -, 



/-- -—dTTN— - ^N 



jN^-HJMI _ „ ^ 



•* — ddH — irsi 



VIIL 



In praecedente folutione ponatur, m antc, fudp-M. 

 leu //= jj. iiufupdp=fp(iM=:pM-J'M.dp 

 lam fit/Mr//>z=P, erit M~f^; et .//M = -^^ 

 vnde iit « - -^ , atqiie porro : 



z-HJ ' _ p?ddP _ 2pd? , ^ p 

 Ct , — dp^ _ df -r~ ^ ^ 

 hincque eliciiintur iftae formulae: 



2_pdd_P idP 



^ {pp—<)dd?'' -^Pd? . p 



~_ fj>fi-4-. ddP ^ ■ p 



IX. 



Loco praecedentis operationis fiat fupdp ~ N, 

 feu u—ffp^ eritque fudp—f^=-}~hfj^' lam fit 

 J^; .= P, fietque N =r 'i^ et ^N = ^H- ./,^P, 

 vnde u^'-^ -h ^/^ = ^-^^ ; at erit 



•~7~ — dp* -t- ei iA — d^, -T- df> * » 



Tom- V. Nou. Com. S Ergo 



