1078
MEXICO
meter? ; 4> concrete tanks with a capacity of 43,718 cubic meters ; 15earthern reservoirs with a capacity of S, 506, 658 cubic meters ; and one cement reservoir, with a capacity of 136,740 cubic meters. On the same date there were existing 113 pipa lines with a total length of 1,420,970 meters and a conducting capacity of 457,216 cubic meters.
Petroleum was produced as follows : — In 1912, 16,538,215 barrels ; in 1913, 25,696,291 barrels ; in 1914, 26,235,403 barrels ; in 1915, 33,910,508 barrels ; in 1916. 40,545,712 barrels ; in 1917, 55,292,770 barrels ; in 1918, 3,838,326 barrels ; in 1919, 92,402,055 barrels.
Mining is the principal industry in Mexico. It is carried on in 24 of the 31 States and Territories, nearly all the mines yielding silver either alone or in combination with other ores. The following table shows the quantities of mineral products for 1918, 1919, and 1920 :—
Metals
1918
1919
1920
Kilos
Kilos
Kilos
Gold
25,313
23,586
23,370
Silver .
1,944,542
2,049,898
1,979,972
Copper ....
70,223,454
56,172,235
46,056,900
Lead
98,837,154
71,375,968
121,434,066
Zinc
20,698,995
11,559,685
14,363,057
Antimony
3,278,546
470,738
1,572,376
Tin ...
13,537
1,588
—
Tungsten
149,486
21,970
34,917
Molybdenum
27,371
1,767
648
Manganese .
2,878,383
2,294,227
838,624
Mercury
163,598
118,940
77,229
Arsenic
1,881,011
2,246,378
1,198,806
Amorphous graphite
6,190,849
4,023.015
2,991,529
Coal is produced only in the State of Coahuila. The output is estimated at 900,000 tons annually. Opals are mined in Queretaro.
Commerce.
The trade of Mexico for 4 years is shown as follows : —
Year
Imports
Exports
29,798,912 30,040,561
Year
Imports
Kxports
1912 1913
i 18,260,231 19,577,233
1918 1916
16,461,090 26,517,870
36,730,545 •12,446,247
The imports and exports for 1918 were classified as follows : —
Imports
Mexican Dollars
Exports
Mexican Dollars
Animal products
19,981,871
Animal products
19,569,701
Vegetable products
87,985, 9Hti
Vegetable products
126,937,322
Mineral products .
28,808,919
Mineral products
213,932,342
Textile and other mauu-
Manufactured products
4,866,086
factures ....
28,853,895
Chemical products
10,688,<M2 '
Spirituous liquors
1,237,233
Paper and accessories .
3,070,472
Machinery and apparatus
11,251,817
Vehicles ....
6,899,459
Arms and explosives .
2,222,195
Sundries not specitled .
14,019,586
Total (1918) .
164,470,035
Total (1918) . ,, (1919) .
307,305,451
,, (1919> .
265,178,706
424,462,471
