= (III) = 



§. i5. Niinc igitiir has formiil:i> diicnmiis in f) t cas- 

 quc ica intcgrcmus vt Ibla quantiras s pro variabili habcatur , 

 .ic rcpcricmus: 



/ds (i/,-^) = y"P s nn. ;- — !iy / d s cof. f 



_!l'::/ji5.ffin. A-i-r:/, 

 eodcmquc modo 



^- r^il' /j j D .f cof. i- -I- A : /, 



r* r '' 



vbi loco confliamium adiecimus fun(!^ioncs quascunque ipfius /, 

 propterea quod tcmpus fpcclatum cll vt conltans. 



§. 17. SupcrcH: igitur tantum vt formulas intcgralos 

 euoluamus, hoc modo : 



/"3 s fiii. - — — ;• cof. i- ; f^s cof. -- :=z r fin. -; 



f s d s cof. ~ ~ i j fln. -'■ -h )■ ;• cof. ^- : 



f s d s fin. * ~ — )• j cofi ' H- ;• r (in. f-, 



fss ds fin. -L ~ — rss cof 1 -h 2 rrs fin. '^- -f- i ;' cof '- et 



'' r r r r 



f^sds cof- ~ rjj fin.- -j- 2 rrs cof '- — :: H fln.-: 



•^ r r ' r r 



hinc igiriir crit 



/a J ( ^^^.* ) = — 2 cof L (r /' -h r^ O 



— j fin. -'- (;■'" H- L':1l') -f- rl^lli con i- et 



r r ^ r r r 



/a / (^) =r — 2 fin. i- (;• ;-^^ -h r' /) 



H-sO/' -i- (r"-^irLz:) cof i^-KlJ-:!! fin.-i h- A : /. 



\ \ r ^ r ■' rr r 



§. 18. Nunc igitur ad acquationcm noflram conftitu- 

 cudam prior formula ducatur in (°'-^) — fin. '- altcra vcro iu 



— (,).vj 



