( Ml ) 
fjbhr f h hr r 
C ' ZC 
m + i 
^ffb^-zbhr~ f-rr) * 
(m 4 - 1 ) '.c m 
irc_ f *b fa a 
m + i c IT 
Sed fi fint fimul «r = — i , & » = — i, habebitur 
— L (b b zbh r -f- V r) -f- f a L r — 
£i£r fp^ = *OL±hL (« + £)■ + 
^ -f b z (a -\-b) z \ \ / * 
fa b fa a 
paL a- 
vel 
7 T £ 
2 
^ -f- b z{a by 
*‘ C t + % *;' - +, o : +fi c?)- 
fb hr . f h h r r fa b fa a 
f ' u f if ' 
Si defideretur squat io fedtionis fluenti per coor- 
dinatas re&angulas ; faciendo CE = x&DE = y 
habebuntur dus squationes rr = 
= y, quarum ope exterminabuntur r 8 c h ex squa- 
tionibus fupra inventis ; & habebitur pro caiu general!, 
m + I 
z {n + i) 7r ( b b -f- 2. by -\-yy -f- x x ) 1 + 
n+ i 
z (m-\- i ) p c m (xx+yy) n •—zqfa n bc m - 1 y — 
q f a n c m ~ 1 yy = z ( n -f- i) 7 r a n c m+I -(- z (m - {- 
i)pa “t* c m —zqfa ** 1 b c m ~ i — qf a** •£*—*. 
Et eodem modo in cafibus m = — i,n= — 1, 
reperientur squationes per coordinatas re&angulas. 
Ut 
