298 ECONOMIC GEOLOGY 



smelting of foreign and domestic ores; (2) imported regulus or 

 metal; (3) imported antimony ores; and (4) domestic ores. 

 According to the Engineering and Mining Journal several carloads 

 of ore were mined in 1912 in Utah, and successfully treated to 

 recover the antimony content, but even at the present price of 

 the metal, the mines are burdened with too expensive transporta- 

 tion to be profitable, and they have suspended production. 

 The bulk of antimony used in the United States must therefore 

 be imported. The duty on the crude metal is If cents per 

 pound and 1 cent per pound on the metal in ore. 



The average price for metallic antimony in 1912 was 8.26 

 cents per pound. The imports of antimony in all forms for the 

 first 10 months of the year were 8,848,874 lb., which was an 

 increase of 355,370 lb. over 1911. The antimony oxide produced 

 during the year was practically all manufactured from Chinese 

 needle antimony. 



TIN 



The production of tin in the United States is a matter of 

 perennial interest because of the peculiar deficiency of tin deposits 

 and the large domestic consumption. The chief interest sur- 

 rounding the tin industry during the present century lies in the 

 construction of a mill and smelter for the production of the metal 

 by the El Paso Tin Mining and Smelting Company in Texas. 

 (2) The Pahasa Mining Company has opened the old shaft of 

 the Harney Peak Tin Company of the Southern Black Hills 

 in South Dakota, and sampled the ore bodies to ascertain their 

 value. (3) The increasing output of tin in Alaska. 



The tin for domestic consumption comes from three sources: 

 (1) domestic primary tin, (2) secondary tin, (3) imports. 



According to F. L. Hess the output of tin in Alaska for 1911 

 was 61 tons of metallic tin valued at $52,409. The vast majority 

 of this came from the placers on Buck Creek. A small amount 

 came from the placers of Tofty Gulch, on Sullivan Creek, between 

 Fairbanks and the mouth of Tanana River. The tin mine near 

 El Paso, Texas, produced 5 tons of metallic tin. The entire 

 output of the United States for 1911 was values at $56,635. 



According to J. P. Dunlop the secondary recoveries of tin 

 form the most important domestic source of supply. Tin is 

 recovered from the various alloys containing the metal as 



