ex qua coiificituv haec acqiiatio: 



,„ (i s (cof. g -j- cof. h) fl s (cof. g -i- cor h) 



2 cof. i f * I -I- coC V ' 



(iue 



^ ^ di ( sjf.g ^- e v.h 



cij-g coj.b -t- y;r!',ff f.i.l} coj.% 



— i -f- cti.g coj.p -t- /;f!,g j.T. w a>i.\ ' 



atque ex li.ac aequatione ope integratior.ij valorcm ipllus 

 arcus S crui oporrer , quod negotiiim feoticuri modo com- 

 modidimc perficitur. 



§. 1$. Pnnatur brcuifatis gr&iia 



j ^ cof. g cof. hzzp ct fin. g(wLh~ q, 



eritque 



S - (cof. g -4- cof. h)f^-j~ . 



Statuatur porro cof. j r: f^;-|, eritque fin. j z= ^- ct 



rfiCof.5c=4i-^^, idcoquc ^^:::^^, His valo^ 



ribus fiibftitutis formula integranda crit 



r d s — 2 r d_z 



J p -+- q coj.s J p ( I -f- z z) -»- ? (i — zz)> 



quae ita rcpraefentetur concinnius: 



r d i r rf_z ^ 



J p -^ q cv.s y f> _t_ ,; -(- ;p — y) a a * 



Cum igitur nouerimus effe 



r _iJE -r — , A tang. V" » erit 



/ pTipf-co]:! = vi^Ti) ^ ^^"^ ^ ^ p^\ ' 

 ideoque 



S = ^-"fl^^, . 2 Arc. tang. z V J-^J. 

 V (p p — g q) ^ p — 9 . 



Z a §. 16. 



