295 



l>i-nmtli-liearing ores come from the Tintic district, Utah, and 

 arc -melted at Bingliam Junction. 



Many tungsten ores arc hismuth bearing. The latter metal 

 ma\ lie recovered as a by-product when reducing the tun^-t M. 

 Sonic l.isniuth is recoverable in t IK; electrolytic copper refineries. 



According to F. L. Hess in 1911 one lot of bismuth-bearing 

 ore \\as produced at the Comstock mine, La Plata, La Plata 

 County, Colorado. This ore contains from 6 to 8 per cent, of 

 l.isinuth lut was sold for its gold and silver content. A. smaller 

 amount of higher grade bismuth ore was mined near Tularosa, 

 New Mexico. 



The average price for metallic bismuth for the year was 

 $1 . 72 per pound. The value of imported bismuth for several 

 years has been between $300,000 and $400,000. The larger 

 part of the supply of the crude metal comes from Bolivia, where 

 the Aramayo Francke Mines, Ltd., is one of the large producers. 

 The crude metal is shipped to Europe for subsequent refining. 

 According to the Engineering and Mining Journal there will be 

 one new producer of bismuth in 1913, viz., The American 

 Smelting and Refining Company which has completed its plant 

 at Omaha, Nebraska. 



COPPER 



Production. The production of copper in the United States 

 shows a steady increase. The only large reduction in any 

 single year came in 1907 as a result of the general financial de- 

 pression. The output of copper for 1912 is the largest ever 

 recorded. The copper-producing states, Arizona, Michigan, 

 Utah, Colorado, New Mexico, and Alaska, each exceeded all 

 former records. Montana and Tennessee nearly equalled their 

 banner output. 



There is no close competitor to the United States in the produc- 

 tion of the red metal. In fact the United States produces more 

 than 50 per cent, of the world's supply of copper. The increased 

 output is due to several causes. (1) The discovery and the 

 opening of many new mines. (2) The working of old mines to 

 their full capacity. (3) The extension of electrical works of all 

 kinds. (4) The construction of new electrical roads. (5) The 

 substitution of electricity on existing roads. (6) The present 

 period of high and profitable prices. 



