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GOLD AND SILVER.
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219
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In
1911, according to the Bureau of Foreign and Domestic Commerce of the
Department of Commerce and Labor, Mexico sent to this country gold
valued at $5,342,566 in ore and base bullion and at $16,784,951 in
refined bullion, a total value in gold of $22,127,517; and silver
valued at $15,570,892 in ore and base bullion and at $9,164,162 in
refined bullion, a total value in silver of $24,735,054, and a total
value in both metals of $46,862,571, exclusive of coin.
During
the same year Nova Scotia, New Brunswick, and Prince Edward Island sent
to this country gold valued at $26,200 in ore and base bullion and at
$7,217 in refined bullion, and silver in ore and base bullion valued at
$370; Quebec, Ontario, Manitoba, etc., sent gold valued at $131,366 in
ore and base bullion and at$6,748,104 in refined bullion, and silver
valued at $9,642,280 in ore and base bullion and at $701,375 in refined
metal; and British Columbia sent gold valued at $3,786,320 in ore and
base bullion and at $1,035,227 in refined bullion, and silver valued at
$386,037 in ore and base bullion and at $126,047 in refined bullion.
The total imports from Canada were gold Aralued at
$11,734,434, and silver valued at $10,856,109, a total of $22,590,543,
not including a large amount of gold and silver coin imported.
MINES REPORT. METHOD OF COLLECTING STATISTICS.
The
first table in this report presents the final, official figures of the
production of gold and silver in the United States in 1911 as agreed
upon by the Bureau of the Mint and the United States Geological
Survey. With the relatively unimportant exceptions of domestic gold and
silver contained in ores, mattes, etc., exported for reduction during
the year, these figures record the actual production of gold and
silver bullion from domestic ores in marketable form as metals, either
refined or unrefined.
Owing
to the difficulty of tracing this total gold and silver production
back to its origin by States, counties, and mining districts, however,
the Geological Survey attacks the problem of distribution by systematic
investigation of the mine production of ores containing gold and silver
during the calendar year, and of the output of the placer mines. In
this way the state of the mining industry is studied m detail, and
classification of output by methods of production and by kinds of ore,
as well as by mining districts, is obtained. The resulting figures form
the basis of the mmes report.
As
already stated, the Bureau of the Mint takes into account, as the basis
for figures of production, statistics of gold and silver in unrefined
bullion deposited in the United States mints and assay offices, in fine
bars of both metals produced by private refineries, and in ores,
mattes, etc., exported for treatment.
The
data for the mines report of the United States Geological Survey may
be classified as follows: (1) Gold and silver from placers in nuggets,
dust, and bullion; (2) gold and silver in mill bullion (obtained by
amalgamation, cyanidation, chlorination, etc.) from mills of mine
companies treating their own ores, tailings, dumps, etc.; (3) gold and
silver in base bullion, matte, etc. (by assay value), from smelters
treating their own ores; and (4) gold and silver in crude ore,
concentrates, old tailings, slags, etc. (by assay value), shipped to
custom mills and smelters—all four of these classes of data being for
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