Mr. Lubbock on the Heat of Vapours, $c. 273 



From these observations I take the following data for aether : 

 p = 1 e = 73 





- 



^ - = [0-1523534.]. 

 p* I 



Hence for aether 

 =- 03153 y=l-0325 ='67086. 



For alcohol 



p = 1 = 14,1-0 



jf = ^ = 200-0 



232-0 



- 



- 1 



~ [0-1830354-]. 



/3 = -04025 y = -96131 E 1-55796. 



For petroleum 



p - 1 6 284- 



^"=34.3 



= [0-2259762]. 



pP 1 

 0-6268 y = 1-0668 = '35294. 



, , 3, Vol. 17. No, 110. Oct. 1840. T 



