) 9^i 



n. {x -\- a) d(pcof.(p-mj d(pCia.<P cof.(p- m X 4 ^ coC^' ; 

 hinc I — II. erit 



dxC\n.(P-{x -+■ a}d(PcoCi(P~}n X d<p. 

 Vt haec aequatio ad integrationem aptior reddatur^ reprae- 

 fcntetur fub hac forma 



4 X - ^LfMj;^^J - a d (p cot. (p. 



Haec autem aequatio integrabilis euadet pofito 



d $ ( m -t - eof. } — d_z . 



erit enim fa<fla fubftitutione 



^x-\-—=^ad(pcot.(pt hinc 



z dx -\-xdz:= az d(bcot.(p, 



vnde integrando xz — afz d(p cbt. (p. 



§. 4. Verwm cum fit 

 ' dz _ 



erjt integrando 



dz_ d(J)(n.-+-''or.$) _ j!^ Hi^; 



— pT^ coj. (J) Jin. CP » 



fin.^-^^ 



Subftituendo hunc valorem ipfius z in aeqiiatione fiipra 

 inuenta fiet 



:, ( H- cof. Ct^f _ .'/_0_cof. p(i-^coCpr . 



/- /fv fin.(p'' . 



fiue ob 1 -V- col. qj — ,— cojr^ » 



A- fin. 



