266 METALS. 84. Cuprum. 



Renovanz v, Ahaifch» Geh, /. 2 3 j. 

 Peacock's tail Copper ore, Hcbmeifser 2* p. \^';, 

 Found in the Altaic mountains of iV^^r/a, and contains from 15 

 to 20 per cent, of copper and a little filvcr. 



aUaicum, HardiOi, with a weak lufhre, hoary, brittle, of a fine 

 fplintery texture. 

 Renovanx 'V. JIhaifch. Geb. p, 235* 



Found in the mines of Siberia, and contains about the fame 

 proportion of copper as the lall: it tinges ammonia green. 



piumheum. Qi the colour and luftre of lead, and of a flat texture. 

 Linck ehem. annal. 1 790- '• /• I^^* 



Found in the mines of Hercyma, and contains fulphur, copper, 

 filver, iron,arfenic, and lead. 



htreynicum» Hardifti, with a dull luftre and dark grey colour. 



Wefirumb ehem . annah l/Sg. 2. /. 527, 



Found in the mines of the Harz.^ and contains a confidcrable 

 portion of copper, feme antimony and fulphur, a little 

 iron, a very fmall quantity of filver, and neither arfenic nor 

 lead, 



Jalicum, With metallic luftre, of a fteel-grey colour, and red 

 flreak. 

 Argentum arfenico, kc. Wall.fyit. 2. /. 238. ff. 7. a. 

 Found in the mines of Sixj^den and Saxony^ and contains iron 

 24, copper 13 per cent, befides a little antimony and filver. 



fuhum. Yellow, with metallic fplendour, emitting fulphurous 



flames and vapours when thrown on hot coals. 



Mundic, 

 Cuprum fulyum. Syji. nat, xii, 3. />. 144. «• 4. 



Cupr. fulph. et ferro. WalLfiit 2. p. 2^2, n.g. 

 Copper pyrites. Kirivan miner, z. p. 140, 

 Copper pyrites. Thomfon chem, 4. p. 39, 

 Sulphuret of copper. Stnverby Brit, min. t. yjt 78. 



The moft common ore in the mines o^ CorniuaUy Ireland, Siberia^ 

 Hungary, S-vue den, S>cc, in innumerable varieties and propor* 

 tioDS, maffivc, difleminated or cryftallized: colour light 

 yellow or greenilh-yellow, fometimes verging on the ftccl- 

 grey, when tarniihed by the air often variegated with gold- 

 yellovir, blue, green or red : texture even or imperfedly con- 

 choidal, rather foft : it deflagrates with nitre, does not cf- 

 florefce by expofurc to the air, nor elfervefce with nitrous 

 acid : before the blowpipe it decrepitates, gives a greeniffl 

 Ifulphurous fmoke, and melts into a black globule which 



