Of BAROME TRICAL MEASUREMENTS. 1 2 1 

 we may fuppofe the temperature r+f to be uniformly dif- 



fufed through it, and fo for (i m) we may fubftitute 



i 

 i+fm. Putting alfo a = g(i+fm) l+ " , and making s+x, or the 



_r 



diftance from the centre, =:% ay 1 '' " /s'v~"yv ; where- 

 fore, taking the fluxions, dividing by y, and integrating, 



To define C, fuppofe that y =. D when x == o, or when v = s ; 



n 

 a 



then, "C = D ' +0 i).r ; and fo, 



n 



/ _1_ JL_\ 



' D 1+a I+ "l r 



and making . = 2, 



M 



36. Now, if be aflarmative, as has been fuppofed, this for- 

 mula, becaufe of the negative exponent of y, gives s infinite, 

 when y rz o. The atmofphere, therefore, on this fuppofition, 

 admits of no limit. But, if we fuppofe to be negative, that 

 is, if we fuppofe the denfity to be as the power i n of the 

 compreflion, inftead of i+, the formula of the laft article be- 

 comes 



And 



