a 



Catalogue of Museums. 



23 — Metallic Tin. Prepared from tin ore taken from the 

 Etta mine. 



Harney Peak region, Black Hills, Dakota. 



24 — Metallic Tin. Large bar prepared from "stream tin." 



Taken from the stream in Bear Gulch, at Nigger 

 Hill, west of Spearfish, Black Hills, Dakota. 



25 26 — Copper Ore. Malachite or green carbonate of copper. 

 Near Central City, Black Hills, Dakota. 



2V — Copper Ore. Chalcopyrite or copper pyrites. 



Black Hills, Dakota. 



28 — Lead Ore. Galena or sulphide of lead. 



Black Hills, Dakota. 



29 — Lead and Silver Ore. Argentiferous galena. 



Galena, south of Deadwood, Black Hills, Dakota. 



30 31 — Uranium Ore. Uran-mica. 



Bald Mountain district. Black Hills, Dakota. 



32-35— Zinc Ore. 



Near Sturgis, Black Hills, Dakota. 



36 — Iron pyrites (iron disulphide). 



Northwest of Spearfish. 



37 38 — Iron Ore. Haematite with mammillated surface. 



Near Spearfish, Black Hills, Dakota. 



39 — Haematite with botryoidal surface. 



Near Spearfish, Black Hills, Dakota. 



40 — Gypsum, massive and very pure. 



Sj^earfish, Black Hills, Dakota. 



41 — Gypsum, with botryoidal surface. 



Spearfish, Black Hills, Dakota. 



42 43 — Gypsum, crystallised Selenite, white and pearly. 



Near Deadwood, Black Hills, Dakota. 



44 — Gypsum, crystallised Selenite, reddish. 



Near Deadwood, Black Hills, Dakota. 



