coLLErrroNs in economic geology and metatj.ttrgy. 107 



I'AUIiOTT SMKLTER. 



These works treat the ore from the Parrott Mine, whieh carries its 

 copper mostly in the form of boriiite. The ores are divided into lirst 

 quality, which are smelted directly in reverberatory furnaces, and sec- 

 on<l quality or concenti-ating ore. 



Ore. 



(1) Borniie and pyrite, in quartz. First quality. (.').^).^)8G. ) 



(2) Bornite and pyrite, in quarfz. Concentrating ore. (55585.) 



(3) Bornite and pyrite, with a little quartz; a mixture of several sizes of concen- 

 trates. (5558:5.) 



(4) Tailings, consisting of quartz with a small amoiitit of sulphides. (55.584.) 



Intermediate proini'ts. 



(1) Lump ore, roasted in stalls. (55581.) 



{•i) Concentrates, roasted in a reverberatoy furnace. (.55582.) 



{'^) Concentrates, roasted and pressed into a brick. (5.55'JU.) 



Final products. 



(1) Matte, from rftverberatory furnace. (5.5.579.) 



(2) Slag, produced with matte. (55580.) 



Accessories. 

 (1) Quartz, nsed for making bottoms of furnaces. (.55589.) 



BELL SMELTER. 



These works treat the ores of tbe Bell Mine in shaft furnaces. The 

 ores are divided into first-class and concentrating ores. The lirst-class 

 ores are roasted in heaps, and the concentrated ores are roasted in 

 reverberatory furnaces. 



Orc3. 



(1) Bornite, pyrite, and quartz. First-class ore. (55G1L) 



('2) Bornite and pyrite; a mixture of several grades of concentrates. (55G1,3.) 



Intermediate liroducts, 



(1) Lump ore, roasted in heaps. (55G10.) 



(■2) Concentrates, roasted in reverberatory furnaces. (5.5612.) 



Flux. 



(1) Limestone. (.55G15. ) 



(2) Iron ore. (5.5GI4.) 



Final products. 



(1) Matte, from smelting tlie roasted ores. (.55G04.) 



(2) Matte, showing filaments of metallic copper. (.55G0G.) 



(3) Slag, average sample. (5.')G07.) 



(4) Slag, crystallized in thin blades. (5.5G08.) 



(5) Slag, in thick heavy crystals. (.55609,) 



