100 



CONTETBUTIONS TO THE KNOWLEDGE 



ACTUAL CONSTITUENTS. 



Cubic feet. 



Hydrocarbons and olefiant gas 8S.3 = 148 olefiant gas. 



Light carburetted hydrogen 219.8 



Hydrogen 140.6 



Carbonic oxide 74.2 



Carbonic acid 3.4 



Aqueoos vapour 7.8 



531.0 



Amount of carbonic acid produced by 1 volume of conden- 

 sible hydrocarbons = 3.47 volumes. 



II.— WITH WATER GAS. 



Cannel used l]21bs. 



Gas produced 1459 cubic feet. 



Coke left 49 lbs. 



Time occupied 3h. 18m. 



ILLUMINATING POWER OP GAS. 



Total quantity of gas when burnt at the rate of 4 feet per 

 hour, yields light = 696.7 sperm candles. 



PER CENTAGE COMPOSITION OF DRY GAS. 



Hydrocarbons and defiant gas equivalent to 19.05 



per cent, defiant gas 10.89 



Light carburetted hydrogen 18.94 



Hydrogen 55.09 



Carbonic oxide 15.02 



Carbonic acid .06 



100.00 



