OF THE MANUFACTURE OF GAS. 



Ill 



oxide ought to be equal to the gain in hydrogen ; but a 

 glance at the analytical results shows that this is far from 

 being the case; thus with — 



BOGHEAD CANNEL. 



The gain in hydrogen = 786.9 cubic feet. 



And " carbonic oxide = 226.7 " 



Hence, gain in hydrogen : gain in carbonic oxide = 3.5 : 1. 



With— 



LESMAHAGO CANNEL. 



The gain in hydrogen = 661.2 cubic feet. 



And " carbonic oxide = 141.6 " 



Hence, gain in hydrogen : gain in carbonic oxide = 4.6 : 1. 

 With— 



INCE HALL CANNEL. 



The gain in hydrogen ...... = 183 cubio feet. 



And " carbonic oxide = 63.9 " 



Hence, gain in hydrogen : gain in carbonic oxide = 2.9 : 1 . 

 With— 



RAMSAY'S NEWCASTLE CANNEL. 



The gain in hydrogen = 158.7 cubic feet. 



And " carbonic oxide = 64.2 " 



Hence, gain in hydrogen : gain in carbonic oxide = 2.5 : 1 . 

 And with — 



METHYL CANNEL. 



The gain in hydrogen = 435.6 cubic feet. 



And " carbonic oxide — 202.6 " 



Hence, gain in hydrogen : is to gain in carbonic oxide = 

 2.2: 1. 



It is therefore evident, that a large quantity of water gas 

 must be generated by the action of steam upon the carbon- 

 aceous materials in the coal retort, and that this water gas 



