zro, 



5V(X_i]»4.X'(\-r)(4-a)+X(X-i)f2-a-^y)+XVP')(2-a+y) 

 i ^X'(X-i;^4.-|3') + X^(4-a)(4.-|3') +X(4-a)(2-(3'+a'] 



-fX(X-i)(2-(3'+a')-Xp(a'-y) 



-X'a'p _Xa'(j3-(5) 



+ (2_a + y)(2_(3/+5;^ _ 



+(^'-y').|3-^) 



& fatfla enolutione : 



X* + X'(6-a-(3';+V(i2-4(a + (30-y-5'+ct(3'-a'p) 

 + X ( I - - 5(a-+(3')+ j^y+S^^+^^al^^-a^^^^-^aS^-a^^^+^^y^-^S^y) 

 + 4-2(a+(3') + 2(y + §'j + a(3'-c{'i3-a5' + ^'J 

 + (3y' — (3'y + yd'-y'5=ro, 



Tnde iam omnino Jiqiiet, quntiior valores ipfius X prodire. 



Caeterum iam facile perfpicitur, aequatioiiis integralis hu- 



iusmoJi f^re formam : 



.v'^ -^ ' [x dy -\- m X d z +- A j/ + B s ) — C , 

 vnde fumtis differentialibus coUigitur: 



x^[x^-ddy^mx^ ddz^[\-\-^)xdy-\-mi^-\-i)xdz 



■\-hxdy -\-'2txdz 



+ (X+i)Ar+(A+i)B2;) = o, 

 quae aeqnatio fi conferatur cum i(ia: 



x^ [x'' d dy -\-m x- d d z-\-' a.-\- m 0.1 , X d y + {^-\-m (3') .v dz 



-\- [y -\- m y') y -\- il -\- m^' ) z) — o , 

 confequimur has aequalitates : 



X+2-+A=a+-raa'; ;« (A+-a)+-B — G-f- ;7;(3'; 

 (X+-i)Az:y-l-?7;y'; (X-f- i )B — 54-77/5'. 



A Hioc 



