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112
MINERAL RESOURCES.
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The
figures in this table are the result of conference and adjustment
between the Bureau of the Mint and the Geological Survey, and are
accepted as final by the two bureaus. The basis for this table are data
collected by the Bureau of the Mint of bullion deposits in the United
States mints and assay offices and by statements from the smelting and
refining establishments; the distribution by States is, moreover,
checked and verified by the data collected by the Geological Survey
directly from the producing mines. The table is derived from three
items: (1) The unrefined domestic gold and silver deposited in the
United States mints and assay offices: (2) the domestic gold and silver
in fine bars reported by the private refineries; (3) the unrefined
domestic gold and silver contained in ores, copper matte, etc.,
exported for reduction. The last is an item of small relative
importance.
The
gains and losses in the production of the various States and
Territories, compared with the production of 1906, are shown in the
following table:
Increase (+) or decrease (—) in production of precious metals in the United States in 1907, by Stales and Territories, in fine ounces.
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The
total production of gold in 1907 was 4,374,827 fine ounces, valued at
$90,435,700. This is a decrease compared with the production of 1906
of 190,506 fine ounces, corresponding to $3,938,100. Out of 22 States
and Territories contributing to the total gold output 12 showed
decreases in production in 1907. The greatest losses were shown by
Alaska, $2,875,700; South Dakota, $2,466,700; Colorado, $2,036,800;
California, $1,979,400; and Montana, $1,049,400. In no other case did
the loss reach $100,000. Ten States and Territories increased their
production of gold in 1907. The only one of these which is of great
importance is Nevada, in which State the increase
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