PHYSIOGRAPHY. 157 



Red Copper-Ore Red Lead-Ore. 



particular species, and divided into earthy and indurated Tile- Ore, 

 Red Copper- Ore itself (the remaining varieties of the present species,) 

 was divided into three subspecies the foliated, which contains those 

 crystallized varieties which are not capillary, together with compound 

 cleavable ones ; the capillary, which comprehends very thin filiform 

 crystals, reticulated, or in velvety groups ; and the compact, which re- 

 fers to impalpable compositions. 



2. In the reducing flame of the blow-pipe, it is reduced upon char- 

 coal into a globule of copper. It is soluble with effervescence in nitric 

 acid, but without effervescence in muriatic acid. 



3. Analysis. 



By KLAPROTH. By CHENEVIX. 



Copper . . . 91-00 . . . 83-50 



Oxygen . . . 9 00 . . . 11-50 



4. It is found in beds and veins in several rocks, accompanied by vari- 

 ous other ores of copper and iron, and by Quartz. 



5. Nearly one hundred modifications of form have been observed in 

 the crystals of Cornwall, at which place the species occurs in tin and 

 copper veins. Handsome crystallizations also occur in the Bannat of 

 Temeswar, in the vicinity of Moldawa ; near Catharineburgh in Siberia, 

 and at Chessy near Lyons in Fiance. Other localities of this species are 

 found in Prussia and Saxony, but particularly in Chili and Peru. The prin- 

 cipal deposits of the capillary variety, are Cornwall, and Kheinbreitbach 

 on the Rhine. Tile-Ore is found among other varieties in the Bannat, 

 and at Camsdorf and Saalfeld in Thuringia. This species has been ob- 

 tained massive, along with Chrysocolla and Native Copper, in the U. 

 States, at Schuyler's mine in New Jersey. 



Red Copper-Ore is frequently produced in the slags formed in the last 

 process of melting copper. Copper vessels, long exposed to the action of 

 the weather, are, to a great extent, converted into a tissue of crystals, of 

 the present species, while the outside is covered with chloride of copper, 



6. It is valuable as an ore of copper. . 



RED LEAD-ORE. H em i-prismatic Lead- 



Baryte. 



Primary form. Oblique rhombic prism. M on M'=s 

 93 30'. 



VOL.. II. 14 



