y' ~ V. Hinc ob 



sfin. l (a4 ^+r-</) f»H. l (b-^e+d-a) - cofj (^- d) - cof. i (^+^;) ; 



2 fin. ^ (^+^-t+<0 fin. J (a-^+^+^) z: cof. l(,h-c)- cof ^ (fl+</>; 



et 



cof. l {a-d)- cof. ^« 4- (^) n: fm. ; a fin. [ </; 

 nec non 



cof. \{b-c)- cof. -; (^ -I- c) — fin. \ b fin. ^ r, 

 fiet omnino 



4- fin. \(a^b-irc-d') fin. t (^ 4- c 4- ^- fl) 



4- fin.; (« 4- 6 - c 4- </) fin. i (a — ^ 4- £• 4- d) 



n fin.|flfin.5^4-fin. ^^fin.i^; 

 fimilique ratione ob 



a cof. ; (<? 4- ^ 4- r 4- ^ co{.\{a — b — c-^d) 



— cof. \ia-\-d)-\- cof. \Q)-\-c)\ 



a cof. i (fl 4- ^ - ^ — </) cof. \[a — b -\- c — d) 



— cof. i (a - ^) H- cof. \{b-c)\ 

 hinc fiet 



+ cof ^ (tf 4- ^ -i- ^ ^ </) cof t (« - ^ — ^ + <^) 

 — <io{.\{a -\- b - c — d) zo^.\[a — b -\- c - d) 



= — fin.; a fin.5 </— fin.i^- fm.i d\ 

 Ynde erit 



fin.i(A4-D) 



yco{.\{aJ^b-\-c-\-d)co^.\{a-b-c- \ -d)co(.ia-b-\-c-d)co{.\{a^b-c -d) 



cof. i fl col. i ^ cof. i 6' cof. l d 



cof i (A 4- D) 

 __y (\\^.\{a-\b-\-c-d)UY\.\ { a-\b-c-\-d)(\n.\ia'b-\-c-Vd)Cin.\{b-\-c-\-d-a) 



~ col. j a cof \ b col. i c cof. ; </ 



Tum 



