The chief producing states in order of importance were Nevada, California, Alaska, Washington, Oregon, Idaho, and Arkansas. Utah and Arizona yielded insignificant amounts. In Nevada the Sutherland mine, in Humboldt County, was the principal producer. In California, the greater part of the output was from two mines in Inyo and Kern counties operated by the Western Metals Co., of Los Angeles, the ore being shipped to San Pedro, near Los Angeles, for smelting. In Washington the antimony was produced at the property of the Gold Creek Antimony Mining & Smelting Co., in Okanogan County. In Oregon the Jim Dandy mine, near Baker City, was the principal producer. In Arkansas one property in Sevier County yielded a noteworthy output of ore in 1916 and also a small quantity of metallic antimony at a local reduction plant. In Alaska the production was mainly from the Fairbanks district, the ore being shipped to Los Angeles and Seattle for smelting. The ownership of mines within the United States does not play an important part in the present control of the world’s resources, inasmuch as production under normal conditions is insignificant. It is possible that with the development of new uses for antimony, and a greater demand for that metal, the reserves in this country may become of commercial importance. About 40 per cent. of the Mexican antimony output is controlled in the United States. An American-owned smelter was built during the war at San Luis Potosi. Ores from mines in this region have also been shipped to the Western Metals Co. at Los Angeles. An American concern, the Antimony Corporation, owns a large deposit of jamesonite, antimony-lead sulphide, in Mexico, which constitutes an important reserve that has not yet been developed. Antimony deposits in northern Mexico were worked by American capital during the war. Prior to the year 1914 only one company in the United States had attempted the smelting of antimony. During the war considerable activity prevailed, however, and several companies undertook the smelting of foreign and domestic ores. China, Bolivia, and Mexico were the principal sources of supply. The success of all these enterprises has been only temporary, as under normal conditions the high cost of production in this country prevents successful competition with Chinese and Japanese metal. American smelting interests exert little control on the antimony of the world at present, and can not be expected to do so in the immediate future. The smelter capacity of the country is estimated at 6,000 to 7,000 tons of metal per annum, all of which is now idle. One company, the Antimony & Compounds Co. of America, is closely connected with a French company, La Lucette.