no CAUSES which affeft the ACC URA CT 



This equation will become integrable if it be multiplied by 



*x 



(i ;) , for it is then 



ns 





j r f m 



and io v ft ; 



a I >x 



' (/+*) (! OT ) 



H-n 



But i; j; = y , therefore, 



a I ** 



V (,+*) (!_) 

 25. IT is neceflary to introduce (3 into this formula, by fub- 



ftituting for /, its value, = - j^-j ^7 j and, therefore, as 



5 (i w) 



3 - 



we 



q 0+*) (iffz) 



(i m) ' m . i+ n/ 



n ~ (j / > *x 



S P 



or 



