-14^ ) i54 ( ^*^- 



et j: vci vnicam tantiim dimcnrioiicm, vel duas , vcl trcs, 

 vel quatuor, obtincnti has quatuor partes feorfim rcprae- 



fento: 



l. n n {dp-\-d s) \\\. p s d s — s s d p 



W.-nnpdp W. pssdp-{-pp{p-\-s)ds. 



§. 5. Incipiamus nunc a parte vltima, quam air- 

 tem, poncndo s ~ p q ■, primo in hanc formam transfun- 

 damus: W.zi: f q {2. q -\- ^) d p -\- f {i -^ q) d q. lam 

 fi haec forma diuidatur per p* ? ( 2 </ + i ) , fict integra- 

 biiis; erit enim ^-^j:— ) = T -^" '^^-^^T ^ ^"^^ ''''"' 

 grando colligitur f^^^r^r, -■ ^ IT^^) • ^i»^' ^^trogre- 

 iiendo ad differentialia, erit 



\^f-rq{^q-\-^)dA,-^^--r-,. 

 Quare fi breuitatis gratia ponatur 7^!^ :::= ^ vt fit 



PoCto porro lii^tll— j, ob 



r:=:-^— , erit \M — f dr — f d.-"-^- . 



§. 6. Formula tertia psds— ssdp^ ita reprae- 

 fentata: pJ"j(V~ V)' ft^f^f" '!'*•: \\^s.c expreffionem : 

 III— p J J. </. / — , fiue, loco s tt. p fubftitutis valoribus, 



\\\-rqq.d.lp- -■^—sdq{ohp- ^ [ A . 



{s.q-\-lY y{2.q-Vi} 



Erit ergo 



III qdq f ■+• I f +* 



