997
Asia:--
India 1905 8,417,739
Japan 1903 10,088,845
Sumatra 1904 207,280
Africa:--
Transvaal 1904 2,409,033
Natal 1905 1,129,407
Cape Colony 1904 154,272
America:--
United States 1905 350,821,000
Canada 1904 7,509,860
Mexico " 700,000
Peru 1905 72,665
Australasia:--
New South Wales 1905 6,632,138
Queensland " 529,326
Victoria " 153,135
Western Australia " 127,364
Tasmania " 51,993
New Zealand " 1,585,756

Coal resources of Great Britain.

The questions, what is the total amount of available coal in the
coalfields of Great Britain and Ireland, and how long it may be expected
to last, have frequently been discussed since the early part of the 19th
century, and particular attention was directed to them after the
publication of Stanley Jevons's book on _The Coal Question_ in 1865. In
1866 a royal commission was appointed to inquire into the subject, and
in its report, issued in 1871, estimated that the coal resources of the
country, in seams of 1 ft. thick and upwards situated within 4000 ft. of
the surface, amounted to 90,207,285,398 tons. A second commission, which
was appointed in 1901 and issued its final report in 1905, taking 4000
ft. as the limit of practicable depth in working and 1 ft. as the
minimum workable thickness, and after making all necessary deductions,
estimated the available quantity of coal in the proved coalfields of the
United Kingdom as 100,914,668,167 tons. Although in the years 1870-1903
the amount raised was 5,694,928,507 tons, this later estimate was higher
by 10,707,382,769 tons than that of the previous commission, the excess
being accounted for partly by the difference in the areas regarded as
productive by the two commissions, and partly by new discoveries and
more accurate knowledge of the coal seams. In addition it was estimated
that in the proved coalfields at depths greater than 4000 ft. there were
5,239,433,980 tons, and that in concealed and unproved fields, at depths
less than 4000 ft. there were 39,483,844,000 tons, together with
854,608,307 tons i