§. II. Aequationis noftrae differentiO-difFerentialis 

 membnim focundum, quod efl; 



/■ ♦ (n — i) (x X — x) -f- n \ d_! 



dircerpatur'in has partes: 



n d t _ *n (j; X — x) d_? i ♦ f« g — x) d s 



2 X — i ' d X 2ji — i * ux ' 2 j: — 1 ' d« 



fiue in iftas: 





quo fado acqiiatio in lianc formam mutabitur: 



(XX -x)dds -«(2A-- d X d s + *-^^^-^-^l±l.iJ) 



-4- ;; (« — i) j-^;f'S~ * 



A-" 



cuius intcgrale particularc vidimus effe s z=: . — eius 



2X — l 



vero integrale completum eft 



_ A A-"-^ ' -4-B(i -.v)''-^' 



s — , 



2X — i 



quod ita oftenditur. 



§. 12. Statuatur s ~ ^ ^^_ ^ , eritquc 



<fj — -^^ -^■"- et 



2 J. I {2 X — IJ- • 



quibus in aequatione illa lubftitutis fiet 



'—r^^^^j - i^-iF^ ^^ ^y -^ '^-^y- ^ ^l 



ndxdy H-i^f 



♦ (X X - X) d X d y *{x x — x) v d X^ \ ' 



"•" (2« — ij'" 12* - .r '^ 



nfa_-_i t y d X- 



quae 



