108 



CONTRIBUTIONS TO THE KNOWLEDGE 



NEWCASTLE COAL, (PELTON.) 



WITHOUT WATEK GAS. 



Coal used 112 lbs. 



Gas produced 504 cubic feet. 



Coke left 70 lbs. 



ILLUMINATING POWER OF GAS. 



Illuminating power of total gas when burnt at the rate of 

 5 feet per hour = 150.2 candles. 



PER CENTAGE COMPOSITION OF GAS. 



Hydro-carbons and olefiant gEis equivalent to 7.16 



percent, olefiant gas 3.87 



Light carburetted hydrogen 32.87 



Hydrogen 60.05 



Carbonic oxide 12.89 



Carbonic acid .32 



Nitrogen and oxygen (traces)... 



100.00 



Amount of carbonic acid generated by 1 volume of conden- 

 sible hydrocarbons = 3.70 volumes. 



ACTUAL CONSTITUENTS. 



(Jubic feet. 



Hydro-carbons and olefiant gas 1 9.2= 35.5 olefiant gas. 



Light earburetted hydrogen 163.2 



Hydrogen 248i5 



Carbonic oxide 64.0 



Carbonic acid 1,6 



Aqueous vapour 7.5 



504.0 



