MAGNETITE AND PYRITE. 133 



2.03.19. The relative importance of the different kinds of ore is 

 shown by the following tables for 1880 and 1890. The increase in 

 red hematite is due to the Lake Superior region and to Alabama. 



Per cent. Per cent. 



1880. of Total. 1890. of Total. 



Red hematite 2,512;,' 1,'J ol 5.1 10,527,650 65.65 



Magnetite 2,390,389 29.98 2,570,838 16.03 



Brown hematite 2,149,417 26.95 2,559,938 15.96 



Carbonate 922,288 11.56 377,617 2.36 



7,974,806 100.00 16,036,043 100.00 



As indicating the relative importance of the different mining 

 regions, the following figures are of interest. No individual State 

 producing less than 100,000 tons is given. 



States. Total in 1830. States. Totalinim. 



Michigan 7,141,656 New Jersey 495,808 



Alabama 1,897815 Tennessee 465,695 



Pennsylvania 1,361,622 Georgia 244.088 



New York 1,253,393 Missouri 181,690 



Wisconsin 948,965 Ohio 169,088 



Minnesota 891,910 Colorado 114 275 



Virginia 543,583 All the others 326,455 



Grand total 16,036,043 



sources, 1883-84, p. 877. E. C. Moxham, "The Great Gossan Lead of Vir- 

 ginia" (altered pyrite in Carroll County), M. E., February, 1892. A. F. 

 Wendt, " The Pyrites Deposits of the Alleghanies," School of Mines Quar- 

 terly, Vol. VII. , and separate reprint ; also Engineering and Mining 

 Journal, June 5, 1886, p. 22 and elsewhere. Rec. H. A. Wheeler, "Cop- 

 per Deposits of Vermont," School of Mines Quarterly, IV. 210. 



