160 KEMP'S ORE DEPOSITS. 



bodies. From 1877 until 1881 Eureka, Nev., was an important 

 source, but since then it has greatly declined. Utah has preserved 

 a fairly uniform production since the early seventies. Lead from 

 all sources is here mentioned, although lead-silver ores are sub- 

 sequently treated. The amounts are in tons of 2000 pounds. For 

 detailed statistics see the volume on " Mineral Industry." (New 

 York : Scientific Publishing Company, 1893.) 



1880. 1890. 



Missouri, Kansas, Wisconsin, Illinois 27,690 55,000 



Colorado 35,674 60,000 



Nevada 16,659 2,500 



Utah 15,000 24,000 



Idaho, Montana 24 : 000 



Elsewhere 2,802 15,994 



97,825 181,494 



From 80 to 85$ of the total product is from lead-silver ores. 



