120 



On the Liquefaction and Solidification [1844. 



gas in the remainder when agitated with oil of turpentine: 10*5 ; 

 10; 10-1; 13-1; 28'3; 6l'S. Whether carbonic oxide was 

 present in any of these undissolved portions I cannot at pre- 

 sent say. 



In reference to the part dissolved, I wish as yet to guard 

 myself from being supposed to assume that it is one uniform 

 substance ; there is indeed little doubt that the contrary is 

 true ; for whilst a volume of oil of turpentine introduced into 

 twenty times its volume of olefiant gas cleared from ether and 

 the acids, absorbs 2J volumes of the gas, the same volume of 

 fresh oil of turpentine brought into similar contact with abun- 

 dance of the gas which remains when one-half has been removed 

 by solution only dissolved 1*54 part, yet there was an abundant 

 surplus of gas which would dissolve in fresh oil of turpentine 

 at this latter rate. When two-thirds of a portion of fresh ole- 

 fiant gas were removed by solution, the most soluble portion of 

 that which remained required its bulk of fresh oil of turpentine 

 to dissolve it. Hence at first one volume of camphine dis- 

 solved 2*50, but when the richer portion of the gas was re- 

 moved, one volume dissolved 1*54 part; and when still more of 

 the gas was taken away by solution, one volume of camphine 

 dissolved only one volume of the gas. This can only be ac- 

 counted for by the presence of various compounds in the solu- 

 ble portion of the gas. 



A portion of good olefiant gas was prepared, well agitated 

 with its bulk of water in close vessels, left over lime and water 

 for three days, and then condensed as before. When much 

 liquid was condensed, a considerable proportion was allowed to 

 escape to sweep out the uncondensed atmosphere and the more 

 condensable vapours ; and then the following pressures were 



