NEW MINERAL DISCOVERIES IN NOVA SCOTIA. GILPIN. 83 



In an oven 18 inches wide, if the coke be not required for 

 blast furnaces, the time of coking would be about 23 hours. 



The following summary shows the results obtained per long 

 ton from a series of charges coked under usual working condi- 

 tions at Giassport : 



Lbs. Per cent., 



{large coke >!" 60.09 p. cent ^ 



small " I 1" 1.64 " VI 593.4 71.13 

 dust " <|" 2.80 " j 



Tar 75.7 3.38 



Ammonia (1.373 per cent sulphate) 7.6 .34 



Gas, total, 10,390 cu. ft. of .466 sp.gr 36S.O 16.43 



Sulphur compounds in gas : 



Hydrogen Sulphide 10.8 .48 



Carbon Disulphide 1.6 .07 



Gas Liquor and Loss, by difference 182.9 8.17 



Totals 2,240.0 100.00 



Of the gas produced, 49.5 per cent was " surplus " gas, that is, 

 gas not required for heating the ovens. This had the following 

 composition : 



defines, C m H n 5.2 



Marsh gas, C H 4 38.7 



Carbon monoxide, C 6.1 



Carbon dioxide, C O 2 .- . 3.6 



Oxygen, O 3 



Nitrogen, N 7.7 



Hydrogen, H 38.4 



100.0 



Its calorific power, the hydrogen burnt to water, was 686 

 B. T. U., its candle power 14.7, and its specific gravity, .51. 

 The coke contains in addition to the fixed carbon, volatile matter, 

 1.27 ; ash, 8.91 ; phosphorus, .0041 ; moisture, 3.67. The ash 

 contains 27.71 per cent of silica, 13.04 per cent of aluminia, and 

 50.60 peroxide of iron, with small quantities of alkalies and 

 alkaline earths. 



