OF THE MANOFAOTOEE OF GA8. 



PER CENTAGE COMPOSITION OP DRY GAS. 



Hydrocarbons and defiant gas, equivalent to lfl*13 



per cent, of defiant gas 1081 



Light carburetted hydrogen 41'99 



Hydrogen 35 94 



Carbonic oxide 10*07 



Carbonic acid 119 



Nitrogen ) . 



[ traces 



Oxygen J 



10000 



98 



ACTUAL CONSTITUENTS. 



Cubic feet. 



Hydrocarbons and olefiant gas 58'05=81-27 olefiant gasi 



Light carburetted hydrogen 225"48 



Hydrogen 19300 



Carbonic oxide S4'07 



Carbonic acid C'39 



Watery vapour* 801 



S4500 



Amount of carbonic gas generated by 1 volume of hydro- 

 carbons, &c., condensed by fuming sulphuric acid, = 2*8 

 volumes. 



n.-WlTH WATER GAS. 



Cannel used 112 lbs. 



Gas produced 806 cubic feet. 



Coke left 68 lbs. 



Timeoccupied 3h. 20 m. 



* It was found quite impossible to determine the quantity of watery vapour 

 contained in each gas as it passed through the meter, since both the tempera- 

 ture of the gas and the degree of saturation were subject to variations during 

 each experiment ; a mean amount of 147 per cent, has therefore been assumed 

 as the watery vapour present in each case. Although this number is not 

 absolutely accurate, it is more than sufficiently so for all practical purposes. 



