I 2' 



§. 21. Cum nunc fit D~^/$3$cof.3<fc exiftente 



^ = (o)-4-(i)cof.$-4-(2)cof.$ 2 + (3)cof.$ 3 -+-(.i)cof.(p 4 -4-etc. 



fingtilos valores integrales in unam fummam colligendo 

 leperietur : 



quae quidem expreffio in plures alias formas transfundi pos- 

 fet, quarum elegantiffima eft haec : 



4 D^i(s)M-|(s).H-i|(7);*ttfe^/^C^t") 



+ ^r£fo.( l 3) + etc. 



§. 22.. Pro littera" porro E invenienda poni debet 

 i zzz 4 , et Lemma praemiffum dabit: 



fd (J) cof. 4 $ cof. (J) x — T A^ia./a (J) cof. 4 $ cof. $ x - 2 , 



unde iterum patet cafibus X zz o et^Xzzi valorem evane- 

 fcere, quod propf ereaj etiam^ continget' cafibus Xz2etXz$; 

 at vero cafus X zz 4 peculiarem evolutionem poftulat. Quo~ 

 niam i vero ante vidimus effe cof. (J) 3 =z \ cof. 3 (p -+- 1 cof. (J) , 

 fi denuo per cof. $> multiplicemus 5 < prodibit 5 cof. (J) 4 zz \ -f- 

 | cof. 2 (p -+- 1 cof. 4 (J> 5 , quae forma porro in cof. 4$ ducta dabit: 

 cof. 4 .$ cof.Cj) 4 zz i '-£■■£ cof.'2(J) -h A cof. 4 $ 



-4- £ cof. '6 $ -}- jVcof. 8 (J\ • 



Haec iam formula ducatur in d (J) et integretur \ tum vero 

 fafto (J) zz 7r manifelto refultabit valor quaefitus zzj-tt, qni 

 eatenus tantum prodiit , » quatenus poteftas cof. (f) 4 per refo- 

 lutionem dederat cof. 4 (J). . 



§.' 23. Cum igitur cafu X zz 4 prodierat valor J, re- 

 liqui independentes vi Lemmatis fequentes accipient valores: 



