306 MJJTALS. 



In the Lake Superior Region, the four larger mines have afforded, 

 according to Whitney : 



N. American. Northwest 





Cliff Mine. 



Minnesota. 



1845, 



8-88 tons. 





1846, 



16-79 





1847, 



183-38 





1848, 



444-85 



4-00 



1849. 



572-38 



34.00 



1850, 



31904 



6600 



1851, 



377-89 



16500 



22.90 



15.32 



76-20 



87-06 



7650 



130-89 



1852, 370 25 208-50 22-90 120 17 



1853, 415-00 48019 112-32 102 27 

 The total yield from all the mines in 1853, was 1,296-94 tons. 



Mr. Whitney observes that various attempts have been made to work 

 the mines associated with the trappean rocks north of Lake Superior 

 and Lake Huron, but as yet with little success. On Spar Island, and 

 also on Michipicoten Island, veins have been opened which are aban- 

 doned. The Bruce Mine, on Lake Huron, is the. only one in those 

 regions now worked with profit. It is situated about fifty miles below 

 Saut Ste. Marie, and due north of the extremity of St. Joseph's Island. 

 The ore is chiefly copper pyrites, with some variegated copper ore. 

 During the year 1853, 1650 tons of ore were shipped. The Wallace 

 Mine, 16 miles from La Clocke, a station of the Hudson's Bay Com- 

 pany, is said to furnish copper pyrites, like Bruce's Mine, and also nickel 

 and cobalt orea* -— 



The amount of copper produced by different mining countries in 

 Europe is as follows : 



Great Britain, 300,000 cwt.t f Denmark, 8,500 cwt. 



Russia, 130,000 " ,' Prussia, 30,000 " 



Austria, 60,000 " I France, 2,000 " 



Germany, 12,000 " Spain, 8,000 " 



Sweden and Norway, 40,000 " j 



Other countries afford in 1853 (Whitney's Met. Wealth) : 



Africa, 1,200 cwt. 



Asia, 60,000 " 



Australia and New Zealand, . 60,000 " 



Chili, 280,000 " 



South America, exclusive of Chili, 26,000 " 



Cuba, 50,000 " 



United States and Canada, . . 40,000 " 



Making the total for the world of about 1,150,000 cwt., or 55,750 tons. 



What three countries are most productive in copper 1 Where are 

 the principal mines in the United States ? 



* Whitney's Metallic Wealth of the United States. 

 t 5-6ths of the whole from Cornwall. 



