▼nde erit ; 



jA^chhi-^.^nc^.v) , |(i-a)p.'^/;</-yfH-«cor'ykor.2| 

 </Cp^ i^ — 1 



§. 27. 5umds ergo quadrati* et minimis neglecftis 

 terminis erit 



z*d<^"—QCh*dv\ I +;; cof vY+\[i-clY \y.Cabhbd-v{ r +«cof.i;)'coC af 

 lam \ero prima aequatio exuta differenti;ilis conftantis 

 d (jj ratione tranfit in fequentem , 



zd^- d^ +h zdoi — 



At eum fit z — b { t -{- n cof. v -f- p) erit -^= 

 -nd^v {\n. V -^ dp et ob </ w =r fji. </ 1; ( i -+-» cof 1;) erit 



{i-\-n cof -y-f-p) d[^:^-)- 



-|(r-ay '^fh dv{i+ncoC. 'y)cof.2^-i-jju^y(i-l-«cof'y)(i+«cof. V+p) 



__ ^}j.abdv( [ -t-n cor.T^K i — ^ co/. g^ 



f. 28. Ponatur iam differentiale dv conffans^ 

 eritque 



, dp — ndvjm^ ddp ^ ndpfyn .v ndv cof. v — nn l';^ 



") }J.dv(,i-^ncoJ,v). — fi.iv{i-^ncoJ.v}~T~}jXi-i-'ncofv'l* " (i ( i -+- '» co/. v)»' 



€t quia eft approximando : 



{i-Jrfj cof v-{-pyzzi{i-^n cof vy-\- 3 (i -f-« cof vfp , 

 crit fubftitutione fada , iisque terminis in quibus p plus 

 vna dimenfione obtinet negledis y 



flv ( ^ +«cof i;)*H- "-^"(r +« cof -y)-lil£f ^l\ i +«cof ■rj' 



za pdv{coJ, v-^n) 3 ( . -0i)i J iCabdv{ , -f-;i co/. -d )co J . 9 CC , /, , „_^r«,Y 



jj^ ^ - rfi\i-h«coi 17; 



-+-1^ 



