UNITS OF MEASUREMENT.
Gold
and silver are measured by the fine ounce. In the computing tables
prepared bv the Bureau of the Mint and the Geological Survey, gold is
counted as $20.671834625323 per fine ounce. The average commercial
price of silver in New York was 67 cents per fine ounce. The metal
fluctuated between 63 and 72 cents, the latter figure being nearly
reached in November, 1906.
As
to the base metals, the average price of electrolytic copper in 1906 is
taken as 19.3 cents per pound, that of lead at 5.7 cents per pound, and
that of zinc at 6.1 cents per pound.
The values given are thus New York prices and do not represent the amounts obtained by the sellers of the ore.
The standard unit for ore production is the short ton of 2,000 pounds.
PRODUCTION OF GOLD AND SILVER REPORTED FROM THE MINES.
The
following table gives the quantity and the value of gold and silver
reported by the producing mines in 1906 to the officers of the United
States Geological Survey. The last column in the table gives the
increase or decrease in value as compared with the mines report of the
preceding year as recorded in Mineral Resources for 1905.
Production
of gold and silver in the United States in 1906, as reported from the
mines to the United States Geological Survey, by States and
Territories, in fine ounces.
