Of BAROMETRICAL MEASUREMENTS. 109 



yx 



then, , : , : : -, and 







In which formula, all the inequalities that have been enume- 

 rated are expreffed, except that which was confidered in the two 



T+A* 



preceding articles. Hence, multiplying by q(r /) , and 

 taking the fluxions, there comes out, 



"~ 



--y v(i m) 



-- j J ^ 



Dividing therefore by y, 



* 5 and making^ 1 " = v t and, confequently, 



n 75^ ~ 2 -' i 



,*- y = v, We have 



i+ra^ 



, , *T MA P- , N *-<" . 



V (l 1 ?) * 2_ ^ fi Til) X = 



xx \ x 



5- (J+A:) 



This 





