= (^37) 



crit = — , qiine antcm cti:im cfl: ^f^ ita vt f)t v zzz "^ ^ : hoc er- 



ll C' 1 rj t 



go valorc fiibltinito iKincifccnuir lieqiicntcm acqiuuioncm diffc- 

 rcntialcm rccundi grndus 



dt^ EifPfcfe znv kkdt 4 11' k krjt- k k 



in qun aequatione niinc duac tantum infunt variabilcs, fcilicet 

 anguius (p cum tcmporc /. 



§, 13. Qnoniam hic variabilis t folum ditTcroiuialc 3 ; 

 occnrrit, ea ad dilTerentiaicm primi gradus rcducctur poncndo 

 d(pz=z ijd i, ita vt lit ^ =l q ct ^J.^ — c^q-> ex quo fiet 



l^^i^Jl — i'/ oh dt — '^-; 



<J t^ d t d^ q 



quamobrem aequatio noftra iianc induet formam 



q-^g—- b bccfdt coJ.(t)' 2b^cf qr)!^ C3/\_$ _^_ h* f gq dt) zga SSPfin. 



ini- k k 



Ponatur brcuitatis gratia 



3ni' kk 



b b c cf __ ^ 

 z n e k k 



63 C/ 



' 2 n V k k 



P 



4 'l 1' * k 



h*f 



kk 



4 n V k k 



y ct i^^ =z 5 



vt habcamus hanc acquarionem concinniorcm : 



(/})(j — ad(pcoi\(p'~pqd(pcoi\(l)-\-Yq(/d(p—^d(l)fiu.(p. 

 Nulla autcm Aia patct , qua intcgralc huius aequationis clici 

 qucat. 



§. 14. Tnterim tairen hinc cafum euohiiiTe iuuabit , 

 quo cclcritas vciui t" vehementer rr.agna exiitit prac moHi ta- 

 buiac, ita vt quantitas ^- rcfpe^fiu c ncgligi qucat,- tum cnim in 

 prima aequatione §. 9. data loco (^'fcof, (J) — ^' s / fcribere 

 hccbit a (2 c c coi. (P\ vnde calculo vt ante ("ubducfto tcrmini 

 littcrii. f3 et y afTcdi practcrniit:i poterunt, ita vt tantum ha- 

 bcatur iihi aeqnatio: 



ydq — cLd(pcof.(P' — ?^d(Pfin.(pzizlxd(p-\-lad(pcof.2(p 



— od(pfm.(p, 

 Noua Acla Acad. Imp. Sc. Tum. IV. S cuius 



