METALS. 8i. Cuprum. 



267 



C^fftpana" 



rum. 



^urichalce- 

 urn* 



gradually takes the colour of copper: it is compofcd of cop- 

 per and fulphur with a little iron: it tinges borax green : 

 Ipeciuc gravity 4,160. 



Hardifh, ponderous^, with metallic iuftre, of a bluiOi-fleel 



colour. 

 Molin Natur. Chil. p. 74f 

 Kluprifih/chreb. Naturf. Berl. 7. /, i6o. 

 Bell metal ore. Kirtuan miner. 2. p. 153, 

 Bell metal. Schmet/ser. mineral, p. \^\. 

 Found in Chilis and in Corntoall near Whealrock, and confiftj 



of copper and .tin pyrites, with fometimes a little arfenic. 



Of the colour and luilre gf bfafs, malleable. 



Molin. Natur, Chil. ^ 77. 

 Brafs Copper ore. Kinivan mineral. 2. ^. 153* 

 Found near rhe river Laxa in dhi/i, and confifts of copper py- 

 rite?, and blende or fulphuret of zinc. __ 



tornuhi^um. Grey, compofcd of fulphur, zinc, tip, and arfenic. 

 ,^ Ra/pe ASl^Fetrop. -i,. hili. p, yj. 



Found in Corn^j.'all^ and is probably odJ/ ^ variety of the Bell 

 naeiai ore. 



fvitratum. Soft, y/ith metallic Uiftre, of a lead colour^ eafily melting 



before the blowpipe. 

 Cuprum canum. Syft. nat. xii. 3./. 144. «. 6, 

 Cuprum fulphure miner. Wall. fyft. 2. p. 277. n.^, 

 Vitro'GUs Copper ore. Kir-xvan mineral. 2. p, 144, 

 Vitreous Copper ore, SchmeiJ/er miner, 2. p, l/\.^. 

 Sulphuret of Copper. Thcmjon chem. 4. p. 38, 

 Found in Cornn.vall, Hungaryy Siberia, Bohemia^ /ludriat Ger» 

 fitanv, Sec. in mafles, plates, threads, or cryftallized in cubes, 

 6-fided piifms, or 4 (ided double pyramids: texture com- 

 pa6l or foliated: before the blowpipe it melts eafily, exhi- 

 biting a green pearl while in fuiion, which on cooling is co- 

 vered with a browj) cryft: it deflagrates with nitre, tinges 

 borax green, and is foft enough to be cut with a knife : ef- 

 fervefces with nitric acid, turning the folution green: fpc- 

 cific gravity from 5,432 to 5*565: the compadl kind con- 

 tained copper 78,50. fulphur 18,50. iron 2,25. filica 0,75. 

 the foliated contained copper 50, fulphur 20, iron 25. 

 Klaproth, 



phlogisticum Black, burning flowly with a flame, and at laft confum- 



ing to alhes, 

 Mineracupriphlogiilica, Cronfi, miner. 160, 6. I. 



LI 2 



