'>P.i ) 73 ( l?l<* 



Formula clifn;rentialis 



fit z^ - — •"" 



zV [i—nzz) ~ y2(i + cou(p)~ 2cor. '^(^ 



§, 14, pofito e— 1, et 



I + cof. (J) cof. l^ 



^ ~~ Yliyz(i -f- colT^ "" ^ « 



Denique forinula difFerentialis 



d z 



— j per §. 15 fit —d(pj pofito 



e-O Ct Z = ^/,^jr^. 



§. 19. Praeter rcduftiones in fuperioribus com-i- 



memoratas pro formulis huius eeneris- — ^ r» 



aliae quoque adhiberi poflent, quarum mentionem inie- 

 cifle fufficiet. Sic pro formula 



V(,4-m^aH. + -.Z2) '"l^ltlt""» ^ — '^-;7^ 



adhiberi poteft. Pro formuia 

 pofito enim « \' — i — r , fiet 



T — n " y (' +ec o/.tf.)' — f>— P') fin.'P* — rccr.v> + p)« 



"^ (, 4. ecoj.v^)- — (. + ecoj. 4,,= > 



tum vero erit 



I -t- w ^ ^ ____^ _ , ponto e _ ^-^. 

 Pro- formula ^;— -^^;^^;^^—-, praeter fubftitutionem §. 15 

 allatam , iflhanc: s - X ^'^,^^;^-'^) adhibere quoque licebit, 

 vbi ;/ X' r ^. Vherius formulae ,,_^J-.^ , rc- 

 dudlio perficietur ope fubftitutionis 



J^a Acad. Tmp. Sc\ Tom. II. P. II. K zzz 



