COPPER. 155 



2.04.33. Copper production in 1882 and 1890, in tons of 2000 

 pounds each. 



1883. 



Lake Superior 28,578 



Montana 4,529 



Arizona 8,992 



Colorado 747 



New Mexico 434 



California 413 



Utah 303 



Elsewhere 1,412 



45,408 129,546 



The figures indicate in general a vast increase in production, 

 and, above all, the advance of Montana. For detailed statistics 

 the volume on " Mineral Industry " issued by the Scientific Pub- 

 lishing Company (New York, 1893) is most available. 



