in Pinal Count}-, and the Plomosa district, in Yuma County, making up the total. There are extensive deposits of auriferous gravel, upon which large operations are contemplated, at Grsaterville.
Gold from siliceous ores increased largely in Yavapai and Mohave counties. The gold extracted by cyanide decreased principally in Yavapai and Cochise counties, but this decrease was nearly made up oy the output of this class of gold in Mohave County.
The gold taken from lead ores in 1904 shows a large increase over the preceding year, which was occasioned by the increased tonnage of this class of ore mined in Tombstone district, of Cochise County, and of the output of lead ores in Yavapai County.
The gold recovered in connection with the mining of copper ores shows an increase for the year principally on account of increased output of this class of ores in Cochise and Yavapai counties.
The following table shows the output of silver in Arizona for the years 1903 and 1901, with the increase and decrease, by counties:
Silver production in Arizona in 1903 and 1904, by counties. [Fine ounces.]
