466 MINERAL RESOURCES, 1921—PART I.
It
has not been possible to obtain figures showing the total consumption
of potassium cyanide and sodium cyanide used in the recovery of gold
and silver in the United States in 1921. If the quantity used in
California, Alaska, and Oregon is added to the 2,776,129 pounds
reported to have been used in other Western States, the total
consumption was probably about 3,200,000 pounds.
ACKNOWLEDGMENTS.
To
those engaged in the mining and metallurgic industries, to merchants,
bankers, and transportation officials of the United States and Alaska,
to the Bureau of the Mint, the Post Office Department, and the Bureau
of Foreign and Domestic Commerce of the Department of Commerce, and to
other officials, public and private, who have cooperated with the
United States Geological Survey by furnishing information on the
production of gold and silver, acknowledgment is gratefully made. To
the authors of the Survey mines reports on the production of gold,
silver, copper, lead, and zinc in the Western States and in Alaska the
writer is especially indebted.
