aSo METALS. 84. Cuprum. 



Red earthy oxyde. Schmeifser tniner. 2. p. \ 30. 



Copper ochre. Thomfon chem. 4 /> 43. 



Found in the mines of Saxony^ in c. mpacft lumps fprinkled in 

 fniall particles: colour hyacinth red, m -re or icis incjiniiig 

 to brov\n or yellow: texture generally earchy, rarely im- 

 pcT'ertly corchoidal, and often covering other follils <s with 

 a cruft : it is eafily pu'ver liable, and m^kcs a confiderable 

 ftain on paper : when l^rcathed on gives an ..ar:hy fineU : it 

 oft n decrepitates- and blackens m the fire, and is not totally 

 folubltr in acid:^ or vol -tile alka i : it has a greater or Icis mix- 

 ture of irt.n, and contains from 30 to 54 per cent, of ox)dc 

 of copper, 



rubrum* Of a duH red or brownlfh-red colour, hardifli, witlioiit 

 metaMic luftre. 



Cuprum ruhrum ^y/t- »«/. xii. 3. p. 145. n. 9. 



Cupr. mil era foiida. Wall, J\st. 2. p. zzb. », 3.3. 



Compaft red ore. Kirivan mineral* 2. p 135. 



Red copper glafs. Schmeifser miner. 2. p. 132, 



Glnfs copper ore. Berkenh. outl, p zbTi^s 



Rel copper ore. Thomfon chem. a^ p 42. 



Red oxvde o^ copper, Sofwerby Brit, min, tab. 53. 100, 



Found in the mmes of Comnvallt Indian Siberiay Hungar\y 

 Sec in compaft msfTes of a common, lamellar, or fibrous tex- 

 ture, and often cryilallized in cubes, prifms or pyramids: 

 colour var'ou-- fiiades of cochineal red, making a bright red 

 fire k, and giving a red powder: it decrepitates and turns 

 black in the fire, is foluble in nitric acid with effervcfcencc 

 and -n the muriatic without efrervefccncc : to the nitric acid 

 it ^ives a greeii tinge, and a blue one to vo'atile alkali : it 

 frequently contains nearly 70 per cent of copper. 



bepaticum. Brown, Toft, -without metallic luflre. 



Cuprum colore hepatico Wall jyst. z.p.zjS. n. 3.b, c. 



H^atic corper. Schmeilser miner. 2. /». 131. 



Found commonly with the r^^-d Oxyde in the mines of S-tveJen, 

 Saxony, Aulirin^ &c. fon crimes in an e rihy and friable 

 ftate, fometime? compaft snd indurated, not unfrequently 

 ever ng other ores in ll^laftitical concentric layers: colour 

 greyiib, yellowifh, or reddifh brown : it fomctimes contains 

 a fm 11 quantity of filver, and is chiefly compofed of oxyde 

 of copper and iron: it yields from 2 to 20 per cent, of 

 copper, 



ttceum* Black, hardifh, without metallic luftre. 



= Cupr.im fereo et paux. fulph. Wall. ffi. 2. p. 280. n 6. 

 Indurated copper, Schmeifser miner, 2, p, \%\» 



