METALS. 94. Cobaltum. 
304 
pjritiasum^ Of a fteel-vvhife colour and luftre, emitting fulphurotis 
vapours before the blowpipe, and when heated with 
powdered charcoal leaving a magnetic bead. 
Cobaltum ferro min. Syji. nat xii. 3. />. 129. n 2. 
Cobaltum ferro rain. Wall. fy t. 2. p. 178. ». 3. 
White cobalt ore. Kinwan miner, 2. p, 273. 
White cobalt ore. Schme'fser miner, 2. p 237, 
White cobalt ore. 1 homfin chem, p. 105. 
Found in the mines of S^veden^ Hungary, Saxony, Bohemia, &e* 
inailive, dilTerainated, coating, ipccular, nodular, corroded, 
or cryllallized in fmall 4-lidcd prifras or cubes or double 
gnadrangular pyramids: colour tin white, often tarnilhed: 
texture generally fine grained, rarely ftriated or divergently 
fiorous ; Ipvcific gravity from 6,284. 'o 6,450 : contains co- 
balt combined with fulphur and iron. , 
Of a bluiffi-tin colour and luftre, emitting fulphurotis and 
arlenical vapours before the blowpipe and leaving a 
magnetic bead. 
Cobalt, crvftallifat. Syft, nat. xii. 3. p. 129. n. l. 
Cobaltum ferro, &c. Wall /y/l. z. p 176. n. i. 
Cr\ftallinc cobalt ore. Serienh. Jyn p. zSg, 
Grey cobalt ore. Schnteifjcr min. 2. p, 235. 
Dull grey cobalt ore. Kirnxan min, 2. p 270. 
Grey' cobalt ore. Thomfon chem. 4. p. 106. 
Found in the mines of Cornvjall and various parts of Europe, of 
a dull grey colour with the furface often tarnilhed : the cryf- 
talsare ufually 6-fided prifras terminated at each end by an 
irregnlar b fided pyramid, fo that the cryllal connfts of 6 
tetragons and 12 hexago .s, with the faces ilnate in an oppU' 
file manner: it confilbs of cobalt c mbined witharfenic, ful' 
phur and iron in various modifications. 
erfsta’li- 
num. 
arsemeale. Of a dull fteel-grey colour and luftre, emitting arfenical 
vapours before the blowpipe and leaving a magnetic 
bead. 
Cobaltum ferro, &c. Syll. nat. xii, 3. p. 129. 
Cobaltum ferro, &c. Wall. fyft. 2. p. 177. n, 2. 
Found in the mines of Europe, accompanying the other cobalt 
ores, of a granular texture approaching to the flat or con- 
choidal, rarely fibrous in a parallel Ilcllate or fafcicled man- 
ner, of a common or botryoidal form, fometimes marked 
with black (hrublike lines: it rcfembles the lall fpecies ex- 
cept that it contains little or no fulphur. 
