100 
TEW: EXTENSION OF MINING OPERATIONS. 
Cubic Feet of Gas obtained per ton of coal ... 10,400 
Tar, Ammoniacal Liquor, &c. ... ... ... 41-25 lbs. (avoird) 
Carbonic Acid ... ... ... ... )^ 
Sulphui-etted hydrogen ... ... ... > 
Coke and Ash 1504 
The gas obtained has an illuminating power of 14*75 candles, 
so far as can be determined by the quantity of coal operated upon. 
The specific gravity of the gas is -41 (air=l). 
The gas contains 4-o per cent of olefiant gas, or of substances 
of similar composition. It was free from carbonic acid and 
sulphuretted hydrogen. 
The coal is much harder than the other samples. Its specific 
gravity is 1-288. AVhen heated in a closed vessel it gives 61-40 
per cent, of coke, and when burnt leaves 4-28 per cent, of ash. 
The sulphur separated from the gas from these coals in the 
test apparatus is, from the Fryston coal, 2-9 lbs. per ton ; from 
the South Kirkby Colliery Soft Coal, 0.75 lbs. ; and from the Hard 
Coal, 0-6 lbs. per ton. 
This coal bed, 9 feet 7 inches in thickness, is extraordinary as 
compared with the generality of the coal of the Barnsley bed, and 
is equal in quality to other specimens of coal in the Barnsley coal 
field. 
The upcast shaft is already sunk to this deep coal bed. and 
the downcast or drawing shaft is sunk to a depth of 400 yards ; 
while it is expected to reach the coal about April, 1883. 
Both shafts are cased with cast-iron tubbing, of which about 
1,500 tons have been used to a depth of 126 yards. 
The drawing engines are a pair of 42 inch cylinders, and 6 
feet stroke ; the nominal horse-power being 400 for the pair ; and 
10 boilers, each 30 feet by 7 feet. 
At the drawing shaft, peculiar and novel modes both of winding 
and loading coal are to be used, whereby it is expected that 
the quantity of coals drawn up will be greatly augmented. 
For the purpose of ventilation at the upcast or air shaft, a Tchiele 
