ftrahamus, ita vt fit Xrro; atque hoc cafu blnac aequa- 



tionts refohiendae erunt 



II. 2 d s d(p ^ s dd<pzz 2 gdrcoC.<P-^-^^. 



§. II. Attendenti autem mox patebit , fi harum 

 flequationum prior per 2 d s, poflerior vero per 2 s d (li 

 n}ulciph'cetiir, (unimam earum , quae erit 

 2ds dds -\- 2sds d(^' -[- 2 / j r/Cj) dd(^ 



— ^gdV{dsC\x\.(^-\-sd(^Qo[.(^^ ^2kkd(Pdd(p 

 fore integrabilem, quippe intcgrale erit 



ds'-i-ssd(p'— ^.gsdr-fm.^P-kkd^li', fiue 

 (fs'-\-Css-\-kk}d(p'z=^gdr(srin.(p-{-C) 



in qua aequatione principium confernationis virium viua- 

 rum continetur. 



f. 12. Huic acquationi addatur prima in s duda 

 ct fumma erit 



d.sds-^kkd(P'—2gdr(:isrm.(p-{-2C),. 

 quae ducatur in 2 s d s, vt prodeat haec forma: 



d.ssds--j~ 2kks dsd<P^'^ 2 g d r (^6 s dn. (^.-^- /yC) s ds. 

 At vero fecunda aequatio duda in s pracbec 



d. s s d(p-\- kkd d(p-— 2 gd t' s coL (p , 

 haec porro ducatur in 2 s s d (P, vt prodeat 



d.s'd(p'-{-2kkss(i(pd(i(p^2gdt\2s'd(pcoC.(p, 

 quae aequatio ad praeccdcntem adieda pracbet 



Q a d.ss 



