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Copper . 
Bell metal. 
White copper, Tutenag. 
The Gong, Petong. 
Ancient weapons and coins. 
Of plating copper with silver. 
platina, 
tin. 
Of the ores of Copper . Copper is found native : it h 
also found mineralized, by oxygen, by sulphur, by arse- 
nic, by both sulphur and arsenic, by the carbonic acid, by 
the sulphuric acid, by the muriatic acid, by the phosphoric 
acid, by the arsenic acid. It is found in the state of an ore, 
frequently containing iron, some times silver, some times 
zinc, some times antimony, some times lead ; one or 
more of these. 
Copper is found native, on the immediate vicinity of 
some part of Lake Superior, of which I have seen speci- 
mens, but cannot point out the place.. I have also spe- 
cimens of native copper from a mine in Maryland, 
The common sulphuret of copper, is found in Con- 
necticut, in Maryland, in New Jersey, in some parts of 
Pennsylvania, in Virginia ; but I know of no place where 
it is worked to profit. 
The oxyds, are red oxyd , containing 88,5 copper, 
11,5 oxygen. Azure or mountain blue 70 copper, 20 
carbonic acid, 10 oxygen. Malachite , mountain green, 
58 copper, 18 oxygen, 12,5 carbonic acid, 11,5 water. 
Sulphuretted copper ores : these vary greatly in the quan- 
tity of copper they contain. Arseniated copper ore, such 
as the green micaceous, the olive-green foliated, the 
brownish- green fibrous— these contain from 49 to 60 of" 
copper, combined with arsenic acid. Phosphat of cop- 
'per, greyish-black on the outside, green internally con- 
taining 68,13 of copper in the state of oxyd, and 30,95 
of arsenic. Muriat of copper hitherto found only in Peri? 
DSI 
