616 



Prof. W. M. Thornton on tlu 



ether, benzene, carbon monoxide, coal gas, and petrol vapour. 

 The methane was kindly sent highly purified by Dr. R. V. 

 Wheeler. Ethane was prepared by the copper-zinc couple 

 from ethyl iodide. In this and the other oases the usual 



1QAM ; F£R£ 



•Oi -CZ, -OS CM. DiAM£T£R 



HYOROGiEN , 30 PE^ CW.HT. 



means of purification were used short of liquefaction, but, as 

 will be shown, the results in different gases are so much 

 alike that, except for special purposes, high purification is 

 unnecessary. 



The results of the trials in hydrogen are shown in fig. 2, 





