OF THE MANUIACTURE OF GAS. 



86 



ANALYTICAL RESULTS. 

 COMPOSITION OP GAS BEFORE PURIFICATION. 



Actual Ammmt in CvMc Feet. Per Centage Amount. 



Amount of Carbon Vapour contained in 1 volume of Hydroca»bons=2.8 volumes. 

 COMPOSITION OF GAS AFTER PURIFICATION. 



Specific gravity of average Gas before purificationrr. 65886. 

 " " after " =.59133. 



VALUE OP HYDROCARBONS EXPRESSED IN THEIR EQUIVALENT 

 VOLUME OF OLEFIANT GAS. 



Value of Actual 

 Amount. 



Value of Percent- 

 age Amount in 

 Purified Gas. 



l.st Experiment 

 2nd Experiment 

 3rd Experiment 

 4th Experiment 



362-2 Cubic feet. 

 376-6 " " 

 4280 " " 



11-58 Cubic feet. 

 1112 " " 

 10-89 " " 

 11-94 " « 



The foregoing analytical results furnish us with a satis- 

 factory explanation of the processes which go on both in the 

 water and resin gas retorts. In the water retorts two distinct 

 decompositions take place, viz., first, the decomposition of 

 steam by charcoal, with the production of equal volumes of 



