THE LESSER METALS, CONTINUED. 271 



num. compound, sperrylite, from this region, is mentioned under 

 " Platinum." l 



2.15.09. Example 23a. Mine la Motte. Considerable pyrite 

 occurs with the lead ores mentioned under Example 23, and this is 

 separated in the ore dressing and treated by itself, as it contains 

 nickel and cobalt. Such pyrite is most abundant at Mine la Motte, 

 and considerable matte is made and shipped abroad. The siegenite 

 in Potsdam sandstone is interesting, but not abundant enough to- 

 be practically available. See under Example 23 for additional 

 literature. 2 



2.15.10. Numerous other localities of nickel ores, chiefly of 

 oxidized character, have been reported, as at Webster, Jackson 

 County, N. C., in the olivine rock, dunite ; in Nevada at the Love- 

 lock mines, Churchill County, and near Riddle Station, Douglass; 

 County, Ore. At the last place the ores are hydrated silicates of 

 magnesium and nickel associated with serpentine, which is derived 

 from an altered olivine rock. Nickeliferous pyrrhotite is reported 

 in the neighboring county, Jackson, at Rock Point. Nickel ores 

 have also been reported from Salina County, Arkansas. Millerite 

 occurs in a vein with quartz gangue in black shales. It is not 

 practically productive. Nickel is also reported in a rather fine 

 conglomerate from Logan County, Kansas. It occurs with man- 

 ganese and limonite in the cementing material of the rock. 



In 1887 there were produced 183,125 Ibs. of metallic nickel in 

 the United States, and 144,841 Ibs. in 1891. Canada produced 

 1,336,627 Ibs. in 1891. 3 



2.15.11. The principal foreign source of nickel is New Cale- 



1 A. E. Barlow, "On Sudbury," Ottawa Naturalist, June, 1891. R. 

 Bell, " The Nickel and Copper Deposits of the Sudbury District, Canada," 

 Butt. Geol. Soc. Amer., Vol. II., p. 125. T. G. Bonney, "Notes on a Part 

 of the Huronian Series near Sudbury, Canada," Quar. Jour. Geol. Sci., 

 XL1V. 32. F. W. Clarke and Ch. A. Catlett, " Platiniferous Nickel Ore 

 from Canada," Amer. Jour. Sci. , iii., XXXVII. 372. J. H. Collins, " Notes 

 on the Sudbury Ore Deposits," M. E., October, 1889, Engineering and 

 Mining Journal, Oct. 26, 1890 ; B. und H. Zeit., Vol. L., p. 148. E. D. 

 Peters, " On Sudbury Ore Deposits," M. E., October, 1889 ; Engineering 

 and Mining Journal, Oct. 26, 1890 ; B. und H. Zeit., Vol. L., p. 148. 



2 J. M. Neill, "Notes on the Treatment of Nickel and Cobalt Mattes- 

 at Mine la Motte," M. E., XIII. 634. 



3 Ark. Geol. Survey, 1888, Vol. L, pp. 34, 35. F. P. Dewey, "On the 

 Nickel Ores of Russell Springs, Logan County, Kansas," M. E., XVII. 

 S. H. Emmons, "The Nickel Deposits of North Carolina," Engineering' 

 and Mining Journal, April 30, 1892. H. B. v. Foullon, "On Riddle,. Ore- 



