45 
Yorksliire Railway to the River Don, he also estimates at 
2,940,382,800 tons, in the seventeen following workable beds, 
making a grand total of 4,757,693,420 tons, or for the sake 
of popular illustration, equivalent to a bed of coal of nearly 
twelve feet in thickness, over the whole area of this coal 
field of 550 square miles. 
NAMES OF BEDS OF COAL SOUTH OF THE LAKCASHTRE AND 
YORKSHIRE RAILWAY, TO THE RIVER DON. 
ABOVE THE ACKWORTH ROCK. 
The Nostel Coal. 1 The Woodmoor, or Weithwood, or 
The Crofton Top Coal. Melton Field Coal. 
The Crofton Low Coal. ' 
The Winterbed, Shale, or Abdy Coal. 
The Stanley Main, Beamshaw, or Kent Thin Coal, 
The Mapplewell, or Kent Thick Coal, 
The Barnsley Bed, or Warren House Coal. 
Tlie Haigh Moor, or Swallow Wood Coal. 
The Flockton Thick, or Forty Yards CoaL 
The Brown Metal, or Park Gate. 
The Silkstone Coal. 
The Whin Moor Bed. 
AND PART OF THE DISTRICT. 
The Low Moor Black Bed. I The HaHfax Hard Coal. 
The Low Moor Better Bed. I The HaUfax Soft Coal. 
But there is also a large and extensive coal field on the 
S. E. and S. of Wakefield, and E. and K E. of Barnsley, 
which is practically only just now being approached. This 
coal field comprises an area of eighty square miles, and it 
contains very valuable seams of coal. 
Taking, therefore, the total quantity of coal raised in 
Yorkshire from 441 collieries at 9,740,510 tons per annum, 
the coal field of this part of the county of 550 miles area 
will require, according to last year's consumption, nearly 
489 years to exhaust it, or it would supply the whole de- 
mands of the United Kingdom (from 2,992 collieries actually 
at work in 1868, which ]Mr. Robert Hunt, the Keeper of 
Mining Records, states was 103,141,157 tons,) for about 
forty-seven years. 
