Ch. 1: Gold and Silver in 1910

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	130	MINERAL RESOURCES.

	UNITS OF MEASUREMENTS. Gold and silver are measured by the fine ounce. The computing tables to six decimals used by the Bureau of the Mint and the United States Geological Survey are based on the exact valuation for gold of $20.671834625323 per fine ounce. The average commercial price in New York for silver per fine ounce in 1909 was taken at 52 cents and in 1910 at 54 cents. The standard Survey 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 from the producing mines in 1910 to the United States Geological Survey. The increase or decrease of production shown results from comparison with the corresponding Survey mine figures for 1909: Mine production of gold and silver in the United States in 1910 as reported to the United States Geological Survey, by States and Territories, in fine ounces.



	A decrease in production of gold valued at $4,504,366 and an increase of 282,832 fine ounces of silver are shown by the mines report for the United States for 1910 as compared with the corresponding figures for 1909. The principal producing States ranked as follows in 1910 in output of gold: Colorado, California, Nevada, Alaska, South Dakota, Utah, Montana, Arizona, and Idaho. The relative positions are the same as they were in 1909 except that in 1910 Alaska dropped from second

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