Reviews— Hunts Coal-Produce Statistics. 2h 
tinue, with occasional oscillations, until the amount reaches one 
hundred millions of tons; but at this point (or thereabout) a maxi- 
mum caused by the capabilities of the coal-fields for producing will 
in all probability have been attained. ‘The following are the results 
for the last three years :— 
Coal-produce for the years 1861 to 1863 inclusive. 
1861. 1862. 1863. 
England and Wales . . 72,809,871 70,434,838 75,064,665 
Scotland . . . . . . 11,081,000 11,076,000 _‘11,100,500 
olamdn ai ec Ge teas 123,070 127,500 127,050 
Burnt or wasted* . . 2,404,000 
86,417,041 81,638,388 86,292,215 
The number of collieries open in 1863 amounted to 2,634 for 
England and Wales, 480 for Scotland, and 46 for Ireland. This 
gives for the first three countries an average of 27,670 tons for each 
colliery yearly; or, taking the number of working days at 260, a 
daily out-put of 107 tons; and for Ireland, of 103 tons, which is a 
larger average than might have been expected; but in all proba- 
bility the number of working days in that country approaches 
nearer 300 in each year. 
Taking the last ten years, the increase in the quantity of coal 
raised in the United Kingdom has been about 23 millions of tons,t 
being at the rate of about 2°3 millions yearly. In the same period 
the number of collieries has increased by 783, or at the rate of 78 
yearly ; and, while (as above stated) the out-put for each colliery in 
1863 was 27,670 tons, for each colliery in 1853 it was only 26,491 
tons; showing that, on an average, there is a gradually increasing 
quantity raised by each colliery—a fact we might have inferred 
from the increasing depth at which the seams of coal are reached, 
and the consequently larger scale on which collieries are now laid 
out than formerly. 
Of the coal-producing counties, Durham and Northumberland, 
embracing what is called ‘The Great Northern Coal-field,’ takes 
the lead, 22,154,146 tons having been there raised in the past year. 
Since the reign of Queen Elizabeth, and up to the last quarter of a 
century, London has been entirely dependent on this district for fuel ; 
but since the opening of the railways, Yorkshire, Derbyshire, Lei- 
cestershire, Warwickshire, and South Wales have poured in of their 
abundance into this great market. Next in importance, in point of 
production, are Yorkshire, Derbyshire, and Notts; then Scotland, 
which raised 11,100,500 tons; after this ranks South Wales and 
Monmouth, all one coal-field, and the others in succession, until we 
come down to Warwickshire, which raised only 685,500 tons. This 
* In the Returns for the year 1861 the estimated quantity of coal burnt or 
wasted is given separately ; in the following years it is included in the quantities 
raised. 
{ Taking 63,500,000 tons as the produce for the year preceding the publication of 
the first number of the ‘Mineral Statistics.’ 
PQ 
