354 



Dr. F. Clowes. The Composition of the [Feb. 21 



volumetric analysis by absorption. Each experiment and analysis 

 was repeated in duplicate, and frequently in triplicate. The results 

 obtained were either identical or closely concordant, except in the case 

 of methane; but the flame of ethylene could not be maintained under 

 the conditions of the experiment. 



The gas was burnt from a tube passing through the mercury and 

 terminating in a jet just above the surface of the mercury. The 

 liquids were burnt from wicks contained in small shallow vessels 

 floating upon the surface of the mercury. 



As in the previous series of experiments (loc. cit.) the combustible 

 substances used were chiefly those which are burnt for ordinary 

 keating and lighting purposes. 



The mean results are tabulated below. 



