276 METALS. 85. Ferrum. 



Found in the mines of Hungary and the Harxy and confifs of 

 oxyde of iron, hornllone, quartz, and jafper, and lometimes 

 a iu all portion of gold : it Irequently appears eroded, 



argillaceum Soft, opake, without luftre, dry. 



Argillaceous iron ilone. Ki^ijcan tniner. 2, p 173. 

 Argillaceous iron Itone. Schmei/Jer min. z. f. 102. 

 Argillac ous iron ore. Thomjon chem. 4. p. 59. 

 Argillaceous iron ore. ^oiierhy Bnt.min. /, 61, 106, 107. 



Found in var ous parts of Great Bitain^ in Italy y Saxony, Ger- 

 many, Bohemia. Sec. in det ched lumps or forming ilrata, 

 fiftular, cellular, or variouflv imitative: colour reddifli or 

 yellowifli grev, or variou-^ fhade- of brown or black, with the 

 furface o'ten uneven and burchy: adheres to the tongue, 

 and has a compact, even or uneven, flaty or fplintery frac- 

 ture: it generally gives a reddifli-yellovv flreak, and has an 

 ear'.hv f"-ell when breathed on: fpecific gravity from 2,673. 

 to 3.471 •* it IS compofed of oxyde of iron, alamma, lime, 

 and filica, jn various proportions. 



Othra. Not magnetic, without luftre, opake, friable, 



Ochra ferri. Syst. nat. xii. ^.p. 192. n. 1, 2. 



Ferrum acidofolut. Wall, fyfi, 2. p. 258,259. 



Iron ochre, Kir^van miner, z. p. 167, 



Red ochre, Kirivan miner, z. p. 171. 



Red crayon. Ihomjon chem, 4 p. 59. 



Found in every country abourdmg in iron ores, fometimes in 

 folution in waters impregnated with iron, fometimes com- 

 pa6l or hardifh, rarely fibrous in a del late manner: colour 

 various ftiades of red or yellow palTing into brown by cxpo- 

 fure to the air: ftreak red or yellow: it adheres to the 

 tongue, ftains ftrongly, and is principally employed in draw-' 

 ing and writing. 



^eerulea* Not magnetic, friable, earthy, without luftre, becoming 

 blue by expofure to the air and browniih in the fire, 

 changing its colours in a folution of foda. 



Ferrum cceruleum. WalL/yfi. 2. p. 260. «. 33. 



Blue martial earth. Kirnxian mine'-. 2. p. 185. 



Blue earthy iron ore. SchmeJjfer miner. 2. p. 107. 



Blue iron earth. Thomjon chem. 4. p.^"] 



Azure iron ore. So-iuerby Brit, min> t. \o. 



Found in many parts of Englaiid and Scotland^ Siberia, 'Ri'Jfia, 

 S^weden, Nornvay, Poland^ Germany, Sec. in marfhy grounds 

 at various depths, generally in an earthy ftate and ivithout 

 any regular fhapc, adhering to the ftones and pebbles which 

 furround it : colour generally whitilh when firft taken from 

 ^he foil, and becoming gradually of a fine blue by expofure 



