66
THE BRITISH EMPIRE : — UNITED KINGDOM
III. Mining and Metals.
General summary of the mineral production of the United Kingdom in 1918 and 1919 :—
1918
191
9
Description of Mineral
Value at the
Value at the
Quantity
Mines and Quarries
Quantity
Mines and Quarries
Tons
£
Tons
£
Alum shale ....
5,231
5S8
4,848
545
Antimony ore '■ '" >
1
4
Arsenical pyrites .
477
4,380
75
667
2,349
210,101
2,527
100,222
Bariam (compounds) .
66,360
218,592
60,087
198,550
9,589
2,736
9,221
2,811
Bog ore /
603
151
3,045
761
Ctialk
2,304,24S
164,741
2,629,406
241,863
Chert, flint, &c. .
54,518
13,233
50,082
15,348
Chromite of iron .
140
100
150
150
Clays and shale
6,003,787
1,696,127
7,765,965
2,358,522
Coal
227,748,654
238,240,760
229,779,517
314,113,160
Copper ore and precipitate .
1,213
17,109
372
10,978
Fluorspar
53.49S
41,310
36,860
86,259
Gtarel and mnl .
2,022,567
291,627
2,048,427
336,421
17S.734
108,516
220,003
138,265
Inneous rocks
3,961,524
1,139,952
4,387,703
1,720,932
Iron ora
14,613,032
7,106,656
12,254,195
7,428,366
Iron pyrites .
22,195
20,398
7,336
7,807
Lead ore
14,784
273,462
13,868
256,377
Lignite ....
150
100
Limestone (other than chalk)
10,156,603
1,992,705 33,313
9,537,495 12,078
2,431,627
Manganese ore
17,456
29,111
Natural Gas . . (cub. ft.)
85,000
90,000
Ochre, ui.iber, Ac.
9,480
17,926
10,547
17,483
Oil shale
3,080,867
1,52S,5S4
2,763,875
1,567,050
Phosphate of lime. .
3,372
—
—
—
Salt
1,976,014
1,647,997
1,908,080
2,079,011
Sandstone ....
1,553,151
614,012
1,699,853
971,329
Slate ...
110,197
429,583
164,098
844,394
Soapstone .
936
1,268
688
1,011
Sulphate of strontia
1,014
2,280
1,872
4,210
Tin ore (dressed) .
6,378
1,115,926
5,156
678,823
Tungsten ores
302
49,215
166
19,255
9,025
95,680
6,933
62,202
Total «
273,988.449
Sr., (100 1
257,079,792
875,884,528 90,000 1
335,673,503
1 Cubic feet of natural gas.
The metals obtainable from the ores produced in 1919 were : — Copper, 144 tons, value 14,176/. ; iron, 3,808,095 tons, 51,511,064?. ; lead, 10,277 tons, 289,769/.; silver, 68,414 oz., 16,266/. ; tin, 3,272 tons, 842,485/. ; zinc, 2,486 tons, 102,951/. ; total value, 52,776,711/.
The total number of persons ordinarily employed at all mines under tin- Coal and Metalliferous Mines Regulation Acts during 1919 was 1,212,974. The number of mines at work was 3,438. 958,133 persons (males) worked underground, and 245,194 males and 9,647 females above ground. The number employed at quar ies under the Quarries Act was ;">7,<>7<i (excluding persons occasionally employed), of whom 3<i,879 (including 132 females) worked inside the quarries, and 20,197 (including 309 females) outside. The number of quarries at work was 5,135.
1'rofessor H. S. Jevons has estimated the resources of British coal in
