44 
In ascertaining tlie quantity of coal yet unworked, 
Mr. Rowland Childe, Mining Engineer, of Wakefield, has 
favoured me with the following calculation. He has taken out 
of the twenty-two beds of coal, found in boring through the 
coal measures to the Millstone Grit, on the top of which they 
rest, the most important beds, sixteen in number, to a depth 
of 600 yards. But with respect to the six thinner seams, 
he has confined the depth to a distance from 200 to 400 
yards from the surface, according to the quality and thick- 
ness of the coal. 
For the purpose of this calculation, he has assumed this 
coal field to extend from the outcrop of the Halifax beds — 
the lowest series of beds in the coal measures — on the JN'orth, 
to the river Don, near Rotherham, on the South ; and from 
near the outcrop of the Magnesian Limestone on the East, 
to the outcrop of the Halifax beds on the West, comprising 
an area of 550 square miles. Dividing this area into two 
divisions, he estimates the unworked coal on the North side 
of the Lancashire and Yorkshire Railway to be 1,817,310,020 
tons, as on the sixteen following beds : — 
Name of Bed of CoaL Thickness. Quality of Coal. 
ft. ins. 
Shale Coal ! 2 0 First Class House Coal. 
Stanley Main or Beamsliaw 6 0 House and Smelting Coal. 
Barnsley Bed or Gawthorpe 3 6 House and Engine CoaL 
Swallow Wood or Haigh Moor 4 6 Excellent House Coal. 
Joan or Mitchell Coal 2 8 House and Steam Coal. 
Flockton Thick, or 40 yards Coal 2 «0 House and Engine Coal. 
Park Gate or Brown Metid 4 0 Ditto ditto. 
Little or Green Lane Coal 2 6 Steam and Smelting Coal. 
Middleton Main 4 3 House, Gas and Engine CoaL 
"Wheatley Bed 3 0 Engine and Lime Coal. 
Blocking Coal 1 10 House Coal. 
Beeston, or Shirtcliffe 3 10 House and Engine CoaL 
Low Moor Black Bed 1 10 Ditto ditto. 
Low Moor Better Bed 2 4 Best Smelting Coal. 
Halifax Hard Coal 2 3 House and Engine CoaL 
Halifax Soft Coal 1 6 Ditto ditto. 
And the unworked coal south of the Lancashire and 
