( 4^ J 



r (A^'Bx\i\x „, : 



^ J ^2 — 2 p X cof. <fc,+/>2 — ^ K r r 



.A-^Bpcoltt .rfin. «6 ^ 



Atque/^, i^lt ^^Hh^^ +^^= ^^^^«'>^^'+^i>^+P'^f^ 

 + ___ arc. tang, ^^~^+jj + cond,, ^ 



S XLII. 



Reseat uc ostendamus, quomodo integrencur formulae 

 et 



Sit X -^p zzZt unde d x =:d z^ acque inveniendum 

 esc 



Prior terminus integratur pofito 2;^ + ^* — y j tunc enim 



_ d V 



J2:d;2 — -^ — ; atque 



Ut autem inveniatury Y;aj.'i"aj«^ ' m quo pro -rf — ^^ 

 fcribamus C, ponendum esc 



/ 



