296 ECONOMIC GEOLOGY 



According to B. S. Butler of the U. S. Geological Survey the 

 output of blister and Lake copper for 1912 was 1,249,000,000 

 lb., which at an average price of 16 cents per pound amounts to 

 approximately $200,000,000. The figures of the Copper Pro- 

 ducers' Association indicate a production of refined copper from 

 all sources, domestic and foreign, of approximately 1,500,000,000 

 lb. for 1912. 



The average price for electrolytic copper for 1912 was highly 

 satisfactory, averaging about 16 cents as compared with 12.5 

 cents per pound in 1911. 



According to the Bureau of Statistics the imports of copper 

 for 1912 approximated to 404,721,323 lb., which is 70,000,000 

 lb. in excess of the importation of 1911. The metal is imported 

 in the forms of old copper, pigs, bars, ingots, plates, etc. The 

 exports for 1912 were approximately 750,000,000 lb. 



Arizona holds the rank of the first producer. The state also 

 holds the enviable record of furnishing a larger production than 

 that ever recorded by any state for a single year. The output 

 approximated 350,000,000 lb., and came largely from the Bisbee, 

 Morenci-Metcalf, and Globe-Miami districts. 



Montana was the second producer with an output exceeding 

 300,000,000 lb. As in previous years the output came largely 

 from the Butte district. Michigan ranks third as a copper 

 producer. The product came largely from the old producers 

 stimulated by the high prices for the metal. Utah, Nevada, 

 California, New Mexico and Alaska are noteworthy producers. 

 The output in Alaska came largely from the Copper River and 

 Prince William Sound districts although southeastern Alaska 

 contributed somewhat to the supply. 



The total output of copper for the world for 1912, as estimated 

 by the Engineering and Mining Journal, was 1,004,844 metric 

 tons. Of this amount the United States produced 536,747 tons, 

 Mexico 71,982 tons, Spain and Portugal 58,000 and Japan 

 54,000. 



CADMIUM 



Production. The output of cadmium in the United States 

 is small, due to the fact that its chief ore is limited in quantity 

 and distribution, and also to the limited demand for the metal. 



According to C. E. Siebenthal, metallic cadmium has been 



