In
all 23,236,827 short tons were mined and sent to reduction
establishments. This represents an increase of 1,896,138 tons over the
corresponding figures for 1905—truly a remarkable record.
Among
the important States a decline in tonnage was confined to California,
South Dakota, and Oregon, and in each of these was due to the mining of
a smaller quantity of siliceous ore. A strong advance was shown by
Arizona (900,000 tons), Montana (478,000 tons), Utah (168,000 tons),
Tennessee (139,000 tons), Colorado (144,000 tons), and Idaho (118,00
tons). In the first 4 States this was almost wholly due to the activity
in copper mining continued from 1905 and stimulated by high prices for
this metal. The camps showing the largest
