By Charles G. Yale. PRODUCTION.
Direct returns received by the United States Geological Survey from mining companies and individual producers for the calendar year 1904 show that the State of California had a gold yield of the value of $18,633,676; silver, $843,936 (commercial value, at 57 cents per ounce); copper, $3,786,022; lead, $4,070, and platinum, $1,866 a total of $23,269,570. Comparing these figures with corresponding ones for the preceding year, it is shown that the gold output of the State has increased $2,333,023; silver, $345,524; copper, $1,252,667; lead, decrease, $3,004; platinum, increase, $914. The total increase in yield for these metals in 1904 over 1903 is, therefore, for the State, $3,929,124.
Production of gold, silver, copper, lead, and platinum in California in 1904, by counties.