21 



§. 3. Difcerpatur iam haec formula in duas partes., 

 ponendo _|*-:_:dP et^ = dQ, vt fit 3 V zz - *d P 

 — | d Q, et quia q 3 — 2 — p 3 , erit 3 P — — - g^g^ ; tum 

 vero ob p 3 =2—q\ erit aQ_zz: -h -Zd— 3 ficque habebimus 



. ^ V - -_j_. dP dq 



4 V -r L _ f 3 . _— jS • 



j. 4., Cumi nunc conftet efTe 

 /x^ = M ^m^ ^ & A tang. *£.. 

 ob 1 + p -f- pp- %=g — -§E$| > erit 



l fzz^: — 6 * ^zr^j-r- yjA ~ng. _-_,. 



§.. 5.. Cum igitur fimili modo fit 

 f-2-, =_ I / :*-=£ + iA tang. f-i, 

 erit integrale quaefitum quater fumtum 



4 Vz-5/ I __?i._.i/izLi 3 .+- JL A tane. -_- 



— * Atang. |-*. 



J. 9. Quod _ iam logarithmi hoc modo contrahan*. 

 tur, vt fiant f /*__z^ -\- ffxEE^» haec expreffio, ob 1 — p 3 

 _r — (1 — q 3 ), praebet J£ — 1 -4- |J^|i vbi pars prior, 

 quia eft conftans^ omittt poteft,. ita vt logarithmi iunftim 

 fumti faciant |Z|frf,* ideoque habeatur:: 



4 V — \ l __? -+- 1 A tang: lH-|A tang. *i- . 



2 I — p ' YJ O 2 p Y3 2 + g 



Bini autem arcus circulares conitrahunttir in vnum 



i A tang. ___zl__ , 



C 3 fio- 



