METALS. 94. Cobaltum. 
X. Dull yellow, with a brighter un 0 :uoos ftreah. 
Yellow cobalt ochre. Kirwan min. 2. p. 277. 
Yellow oxyde of cobalt. Schmei/str miner. 2. p. 242, 
Yellow cobalt ore. ‘Thomfonchem. i,. 
3. Green, in the form of minute capillary cryftals, combined wida 
nickc"l« 
Green cobalt ore. Kirnxan mineral. 2 . 280. 
Green oxyde of cobalt. Schneider min, 2. p. 242. 
Found in the mine, of Great- Britain and various parts ^ the 
continent, generally depofited on other ores, though fome- 
times found botryoidal or kidney-lhaped : colour various 
lhades of brown, reddifh, yellowifli, green or mcbnmg to 
bluer it very readily forms a glafs of various lhades .of 
blue. 
€aiaIti£o, Radiated, red, with a glaffy Inftre, emitting arfenical «a- 
pours when thrown on hot coals, 
Ochra puipurea. Syji.nat xii.3.^. 195 ’ 
Ccbaltum arfenico. Waii.fiji. t..p. 181. a. 6. 
Red cobalt ore. Kirvjan mineral 2, p. 278. 
Red oxyde of cobalt. Schmei/ser.miner.z. p, 243 '* 
Arfeniat of cobalt. Thamfon-djem. p.itsZ. 
Found near the lakes of Killarney in Ireland^ and in moit places 
where the other ores of cobalt abound, fometimes maffiv^ 
fometimes in the Hate of flowerst colour various lhades df 
red from pale peach-blolTom red to deep crimfon : fometims 
it is found depofited on different ftones in the form of fmall 
a-fided prifmatic cryftals difpofed in a llellate or radiate man- 
ner, which are Ihining, femitranfparent and foft to tte 
touch 1 it oonfifts of cobalt combined with the arlemcal acid. 
merceremu Ijtconfpicuons, of a -dirty mixed -colour, when burnt and 
fufed with lead leaving a bead of lilver. 
Argentum nativum. Wall. Jy ft, 2. p. 345. n, 16. 
Schreher Bergm. Journ. 1 788. 1. p. 43. 
Found in the mines of Nomvay^ Saxony, Germaiiv, Hungary ma. 
Dauphiny, and contains a mixture of lilver. iron, fometimes 
nickel, arfenic, rarely rjuickfilver, in fuch indetetminate 
proportions as to make it dilEcult to fix its genus. 
atin-white cdour and l-uftre, emitting fulphurous va- 
pours when thrown on hot coals, and at length leav- 
ing a pure -oxyde of cobalt. 
Geyer them, annul. 1788. t. p. 67. 
Sulphurifed cobalt. SchmeiJJer miner. 2. />. 239. 
Found in Svieden and Hungary, fometimes roiflive, fometime* 
in cubical cyftals without ftris, and is compofed of cobak 
ami fulphur with arfenic or iron. 
