Ill 



that Lave been fouud, moderately good specimens of wliich are 

 exhibited. 



3441, melaconite — black oxide of copper. QS2, cuprite. 3194, 

 cuprite crystallised witli native copper. 



3193, Copper Queen Mine, Bisbee ; cuprite crystals showing 

 faces of the ct(,he and octahedron 



7436, Bisbee ; cuprite — a very pretty specimen. 3203, 

 Morenci ; azurite. 3195, Morenci ; azurite in groups of 

 aggregated crystals. These nodules occur sparingly through 

 immense beds of kaolin, and are not worth working. 



640, clirysoGolla. 3192, copper sulphate. 3580, hornite with 

 malachite and quartz, assaying 1\ oz. of gold and 9 oz. of 

 silver per ton, and 31 per cent, of copper. 



. In case 105, malachite. 



This is the greatest mining camp in the world, and has the Montana, 

 largest output of copper. The ores are low-grade sulphides. 

 Hich specimens of glance and bornite are exhibited. 



3202, Amherst County, Virginia ; hornite. Other Ifortk 



American 

 667, French Creek Mine, Pennsylvania ; crystallised copper localities. 



pyrites. This is the only specimen in the Museum showing 



crystals of copper pyrites. The mineral is generally found 



massive. 



Sulphide ores from California. 



3590, Ormay Count}^, Colorado ; fahlore with cosalite 

 (argentiferous sulphide of lead and bismuth).* 



622, Eagle Bay, Canada ; native copper with calcite. 



Sulphide ores from Harvey Hill, Canada, 



652, El Bolo Mine, Baja, Mexico ; malachite with gypsum. South 



America. 

 A few ores from Chili are shown. The copper industry of this 



country Avas once very considerable, but is rapidly waning. 

 Atacamite, the oxy-chloride of copper, constituted a good pro- 

 portion of the ore. A good specimen (641) is exhibited. 



* This rare mineral has also been found in New South Wales. (See page S7.) 



