OF THE MANUFACTURE OF GAS. 



117 



CANNEL GASES. 



Inoe Hall oannel 2.95 candles^ 



Ditto with water gas 2.96 " 



Boghead cannel 2.80 " 



Ditto with water gas 2.83 " 



Lesmahago cannel 2.58 " 



Ditto with water gas 2.54 " 



Ramsay's Newcastle cannel , 2.88 " 



Ditto with water gas 2.86 " 



Methyl cannel 3.04 " 



Ditto with water gas 3.03 " 



COAL GASES. 



Pelton coal 4.23 candles. 



Gas B 3.73 " 



Gas C....... 3.91 « 



The conclusion resulting from the application of Mr* 

 White's hydrocarbon process to coals and cannels may he 

 thus summed up : — 



1. It greatly increases the produce in gas from a given 

 weight of coal or cannel, the increase being from 46 to 290 

 per cent, according to the nature of the material operated 

 upon. 



2. It greatly increases the total illuminating power afforded 

 by a given weight of coal, the increase amounting to from 

 12 to 108 per cent.^ being greatest when coals affording 

 highly illuminating gases are used. 



3. It diminishes the quantity of tar formed, by converting 

 a portion of it into gases possessing a considerable illumi- 

 nating power. 



4. It enables us profitably to reduce the illuminating 

 power of the gases produced from such materials as Boghead 

 and Lesmahago cannels, &c., so as to fit them for burning 

 without smoke and loss of light. 



5. It increases the per centage amount of hydrogen and 



