3o6 METALS. -95. ATagnefium. 



Bergman chem. annal. 1784.2. /). ^67. 



Founci in Derhyjkire^ forming confiderahle ftrata, friable and 

 ^encral'y fmooth between the fingers, ahd of a blacHfh or 

 redd ifh-- brown colour: contains manganefe, oxyde of iron, 

 lead, and mica. 



muea. White, becoming brownifh or blackifli when healed, foft, 



effervefcing with nitric acid and emitting fulphurated 

 hydrogen gas. 

 White calx of manganefe. Kirijcan miner, 2. p. 297. 

 White ore of manganefe. Berknih.fyn p.2-]0* 

 Carbonat of mang;!nere. ^homfm chem. 4. p. 1 13, 

 Found in the mines of Great Brttcin^ Nortvay, Sivedefj^ and 

 Tranhl^aniuy in round or kidney -form maffes, or varioufly 

 dilTenunated, fometimes in loofe fcales : colour white with 

 often a reddifh tinge : texture either radiated or in incurved 

 foliations: with the muriatic acid it gives the fmell of nitro- 

 muriatic acid : before the blowpipe it gives a violet colour to 

 borax. 



rubra. Red, colouring glalTes red. 



Cronst, mineral. 115.6. I . b. 



Found near Piedmont and Lent on the Pyreneesy in round lumps 

 or fibrous in a ftellate manner. 



'Vulgaris, Soft, ftain ng the fingers, of a fleel-grey colour with me- 

 tallic luilre. 



Ferrum fufcum. Syst. nat. \, p. 176. ;z. 8. 



IMolybdaenum. Syst. nat. xii. 3. />. 121. n. 2. 

 . Magnefia fuliginofa Wall. fsji. 2. p. 138. n. 2. 



Black and brown ore. Berkenh. f\n- p. 270. 



Grey ore of manganefe. Kir^ovan miner^ 2. p. 291. 



Grey oxyde of manganefe. Schmeifser miner. 2. p. 252. 



Grey oxyde of manganefe. ^homfonchem. 4 p. 109. 



Oxide of manganefe. Somcerhy Brit. min. tab. 86. 



Found in various parts of Qreat Britain, particularly on Mendip 

 hdl in SomerJetJInre^ in Sijceden^ France, Germany., Bohemia, 

 Silefiay Scc^ mafTive or difieminated, or varioufly imitat've, 

 in fmall acutangled quadrangular prifms or 6-fided acicular 

 columns with the faces often longitudinally ftriate: colour 

 greyifii-white more or lefs dufky, with fometimes a fmall 

 tinge of red : texture feldom compaft, generally fibrous in a 

 fte'late manner, radiated, or foliated, with the fragments in- 

 determinate or wedge-form or fplintery : foft, briit'C, with a 

 black or brown flreak : before t.he blowpipe it becomes black- 

 ifh-brown but does not melt, and tinges borax violet: it is 

 ufed for colouring glafs, as an ingredient in pnnter*i ink, and 

 for procuring oxygene gas from ; nearly two quarts of this gas 



