Ql^IBFSD. CAtCJTl INTEQRAUS. £^9 



-V- Vjdx'V{(xx"' -f- (3 X -f- y) qiine a tnli quadratura dc- 

 fcadebit, et difFerentuta lubmiiiilitrut hanc: 



\ '^^\ *B(3< ^BG^ ^C^ 



I 4-ByI dx-^ '^ r .''dx^^^^t^^x^dx^-ll)^) x^dx 



^ 'y^ fpl 1^^ 4e|^ 



5it niinc ad qiiadraturnm circuli reuocandum hoc difFe^ 



rentiale, vTiax — a') ; prodibit ex compa- 



ratione terminorum homologorum , azz— i , ]3 — 2^, 

 •yz=o, Amo, B — — ^«-, E — 0, D±r — |, C — 17, 

 T~?^'; et defideratum integrale erit fequens- ( — i«'jc 



§. i(J. Pi-obkma III. Propoiltum fit reftificare 

 curiiam, m qua , fumtis .v ct j coordinatis crthogrnali- 

 "bus, tn conrtante , ds eiemento curuae, et r — radio 

 ofculi, obtineat haec pioprietas, — — "7^-- — (»z=-i)tf/. 

 Statuatur elementum curuae ds conftans ; quo faiflo, 

 erit r ~ ^^^,4' i ^^^- ^^^"^' Birnoiilli Ofera , ^ywo /. 

 ;^^. 578. Vnde habebitur'^-'^-^--=^^^-^i^zr(«.'-iy,, 



aut vero — ^^^/f ::^ [m^— i]ds. Eft aurem, 



6b «'j coriftins, dxddx — ^ dyddy^ tx /^f/? modo ci~ 



Wo, et quod {acik cemitur pontndo diffcrcnti;.le ipfius 



Tom.V.Nou.Com. li ds^ 



