TEW: EXTENSION OF MINING OPEEATIONS. 
99 
not generally appreciated for domestic purposes ; the two top beds 
of this Shafton coal, 1 foot 4 inches thick, are of inferior quality. 
The next bed of coal worthy of inention before the Barnsley 
bed is reached, is the Kents Thin, or Bottom, or Best coal of the 
Stanley Main seam. It is 3 feet 2 inches thick, and of good 
quality for domestic use ; but the other beds of coal, forming- the 
Stanley Main Coal in the Normanton district (viz : the Lime Coal 
and Black Bands), are separated at this Colliery by many yards of 
parting- or measures. 
The famous Barnsley bed of coal is reached at South Kirkby 
at a depth of 634 yards, as per section : — 
Feet. Inches. 
Top Soft Coal ... 3 10 
Dirt Parting • .. 0 7 
Hard Goal ... 2 9 
Bottom Soft Coal 2 5 
Total 9 feet, 7 inches. 
The following are the results of a careful analysis of the 
Barnsley Soft Coal, obtained from the South Kirkby Colliery, for 
gas making : — 
Cubic feet of gas obtained per ton of coal ... 8,960 cubic feet. 
Tar, Ammonical Liquor, &c. ... ... ... 408 lbs. (avoirds) 
Carbonic Acid ... ... ... ... -j^g.^^ 
Sulphuretted-hydrogen ) " " 
Coke and Ash 1,495,, „ 
The gas obtained has an illuminating power approximating to 
15 candles so far as can be determined from the quantity of coal 
operated upon. 
The specific gravity of the gas as compared with air at 30 
inches Bar. and 60° Fahrt. is 0'45. 
The gas contains 4*8 per cent, of olefiant gas, or of substances 
of the same composition as olefiant gas. 
As prepared and purified in the test apparatus by Mr. Thomas 
Fairley, F.R.S.E., of Leeds.— 24th October. 
An analysis of the Barnsley Hard Coal for gas, gives the 
following results : — 
