total production of gold in Wyoming, from 1867 to the end of 1913 is
given by C. W. Henderson, of the United States Geological Survey, as
$1,191,178, and the output of silver for the same period as 58,680 fine
ounces, valued at $40,303.*
production of gold from Wyoming mines in 1913 was $24,184, against
$22,235 in 1912. Of this output $22,777 came from siliceous ores in
1913 and $1,407 from placers. The principal production was again from
the Atlantic City or South Pass district of Fremont County.
silver output of Wyoming in 1913 was 957 ounces, against 265 ounces in
1912. The production was chiefly from copper ores of the Hartville
district of Platte County.
Gold.—The gold production of the Philippines in 1913 was $868,362,2 against
$570,212 in 1912 and $189,953 in 1911. The output is almost wholly from
the milling, amalgamating, and cyaniding of gold-quartz ores and from
placers. About $420,000 came from these ores treated on the island of
Masbate, where the Colorado mine and mill has been especially
productive, and about $322,000 came from dredging the placers of Ambos
Camarines, on the Pacific coast of southeastern Luzon. The notable
increase in Philippine produc-
ion has been mainly from these two sources, and they have stimu-
ated other gold mining operations in the islands.
Silver.—Approximately 10,850 fine ounces of silver was produced from the refining of gold-mill and placer bullion of the Philippines in
[913. The production was 7,121 ounces in 1912 and 3,383 ounces in 1911.
NUMBER OF PRODUCING MINES.
following table indicates the number of mines producing gold and silver
in 1913, divided into placers and deep mines. The placers are those in
which gold, the silver in natural alloy with the gold, and
a few instances platinum are recovered from gravels and sands, whether
by hand-washing, sluicing, hydraulicking, drifting (in frozen
or ancient buried river channels), or dredging. The deep mines are
those producing gold and silver mainly from underground workings,
including those whose ores are valuable chiefly for copper,
ead, or zinc, but which contribute precious metals as by-products.
addition to the producing mines here enumerated, many mines were being
prospected and developed without making an output in 1913, and annual
assessment work (required by law to hold claims not patented) was done
on a very much greater number of new or old, worked-out, or
indefinitely idle properties, once productive or otherwise, and of
mere mining claims, which have not yet become "mines." The enumeration
of placer mines is less satisfactory than that of deep mines, because
some of the operations are only temporary and because the production is
frequently by transitory miners not regu-
i U. S. Geol. Survey Mineral Resources, 1913, pt. 1, p. 50, 1914. I Bur. Science Press Bull. 25, Manila, Apr. 24,1914.
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