METALS. 85. Ferrum. 277 



fotbe air, though ace -rding to Mr. Sowerby, it is fonieMmes 

 blue when frcfh gathered and firft broken ; il ftains rtronglv, 

 feels har(h to the touch, is moderuely heavy, and dilTo'ves 

 re?dily in acids; when heated on red hot coals it inllnies 

 and leave? a red powder; before the blo>'pipe it becomes 

 redd ifti- brown, and melcs into a black bead, and tinges bo- 

 rax of a dark yeliow : in water it preferves jt« colour, but 

 becomes black in oils ; it is by Kiaproth confidered as a 

 phofphat of iron. 



jmaltinum» Not magnetic, hardifh, earthy, opake, without Iiiftre, 

 blue, not changing its colour in a folution of foda, 

 becoming grey in the fire. 

 Kiaproth. J'chr, b^rL naturf. 10, p, 91. 



Found T\tAr Forau'm Hunga-y, f'Tming together with quartz 

 and white micaceous gneifs a vein from a quarter to half an 

 inch thick : when fi'il dug from thu mine it is of a fine blue 

 colour, but lofes all its colour when thrown on red hot cin- 

 ders: with borax it nielts into a pale yellow tranfparentg'afs, 

 with phofphoric acid a colourleis one : it is not like the lalt 

 foluble in acids; it conlilts of oxyde of iron, alumina, and 

 fiHca, 



iuhaquoium» Not magnetic, without luftre, opake, of ^ dull colour, 



humid. 



Tophus Tubalcaini. Sytt. nat, xii. 3. p. 187, », 5, 



Ferrum limofum. Wall fyli. Zs p^z^^. n 19. 



Lowland iron ore. Ki>-n.van miner. 2. ;>, 179. 



Subaqueous iron ore. SchmeiJJer winery i. p 106, 



Bog iron ore. Ihomfon chem. /^, /'•^l* 



Found in Great Britain and various parts of Europe, in low 

 fwampy lituations, Ifagnant laKCs or in brook-waters, fome- 

 tim-s maflive, bur commonly in detached lamps of various 

 fhapes, as placcntiform, flit and rounded, globular or kidney- 

 form when it is called Eagle ft oney granuhir, or pifiform, 

 generally perforated, fiflular, or fpongy : colour brown with 

 vaiious (hades of red, green, yellow, blueorg-ey: texture 

 earthy, brittle : it coi fifli of oxyde of iron combined with 

 phofphoric acid and alumina; 



^airide. Of a green colour, fhining, dillolving in acids with diffi- 

 culty, friable. 



HoffTTtann^ Berg, Journ, 1 1 . I . />, 397. 



Green martial earth. Kir'wan min. 2. p. 1 88. 



Green iron earth. Schmei/Jer miner. z,p 108. 



Found at Schneeburg in a matrix of quutz and clay, compa6t, 

 folid, or like a corroded Hone, oftencr invcfting or incuni- 

 bent, and feldom indurated ; colour various (hades uf ^reei^ 



