Mineral Resources of the United Slates, 1912. (Washington Government Printing
Office.) — This gigantic work—two volumes containing 2,300 pages-is a testimony at once to the diligence of the United States Geological Survey, which has prepared it, and to the vast mineral wealth of the United States, which it describes in detail. In 1912 the total value of the minerals produced in that country came to the enormous sum of four hundred and fifty millions sterling— the largest on record—exceeding the hitherto unsurpassed annual value for pin by 825 per cent. Of this output, nearly half was represented by fuel—coal, petroleum, and natural gas (seventeen millions sterling of this alone)—and rather less by the metals—iron, copper, gold, zinc, silver, and lead (in order of output); the rest consisted of structural materials—stone, cement, &c.
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