302 ECONOMIC GEOLOGY 



and Japan. The supply in New Caledonia is the best known but 

 this also fluctuates in the amount and value of its production. 

 In 1906 the production of this single field was 84,241 metric 

 tons, but in 1907 it fell to 3800 metric tons. The output of Rus- 

 sia where the industry centers in the Urals, and in India in Balu- 

 chistan and Mysore, the industry is subject to the same fluctua- 

 tions. The output of Rhodesia which is the foremost producer at 

 present is increasing. The mines are not far from Selukwe, 

 about 560 miles from the port of Beira. The production from 

 Rhodesia shows that ores from deposits in a comparatively 

 inaccessible part of the world may be placed upon the European 

 market under conditions which enable them to compete with 

 more favorably situated supplies. 



COBALT 



According to F. L. Hess there was no production of cobalt in 

 the United States in 1911. A possible source of cobalt lies in 

 the concentrates saved in extracting lead ores at Fredericktown 

 and Mine La Motte, Missouri. A second possible source when 

 transportation facilities are improved is near Blackbird, Idaho. 

 The supply of cobalt for domestic consumption is said to come 

 wholly from Cobalt, Ontario. The ores are shipped to England 

 and the oxide imported. Cobaltiferous ores from which the 

 oxide is also manufactured are treated by the Orford Copper 

 Company, Constable Hook, N. Y. 



The interesting alloy stellite, composed of cobalt and chromium, 

 is manufactured on a small scale for knives with stellite blades. 

 This use appears to hold the most promising outlook for the 

 metal. 



NICKEL 



A small amount of nickel, amounting approximately to 

 $125,000 is saved as a by-product from the electrolytes of the 

 copper refineries. Much of the copper refined electrolytically 

 contains small percentages of nickel which during the process of 

 refining the copper passes into the electrolyte. If the accumu- 

 lation exceeds 1 per cent, it is said to be harmful to the perfect 

 deposition of the copper. The copper thus treated comes from 

 domestic and foreign sources, but the amount derived from 



