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A commercial name of a crude arsenic used as fly poison. Cobalt bloom. Same as Erythrite. -- Cobalt blue, a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; -- called also cobalt ultramarine, and Thenard's blue. -- Cobalt crust, earthy arseniate of cobalt. -- Cobalt glance…

Pertaining to, derived from, or containing, cobalt; -- said especially of those compounds in which cobalt has higher valence; as, cobaltic oxide. Luteo-cobaltic compounds (Chem.), an extensive series of complex yellow compounds of ammonia and cobaltic salts. -- Roseo-cobaltic compounds (Chem.), an extensive series of…

Containing cobalt.

A mineral of a nearly silver-white color, composed of arsenic, sulphur, and cobalt.

Pertaining to, derived from, or containing, cobalt; -- said esp. of cobalt compounds in which the metal has its lower valence. Cobaltous chloride, a crystalline compound, CoCl2, of a pale rose color when hydrous, blue when dehydrated. Its solution is used for a sympathetic ink, the writing being nearly colorless when d…

Pertaining to, or designating, certain compounds of cobalt having a yellow color. Cf. Cobaltic. Luteocobaltic chloride (Chem.), a brilliant reddish yellow crystalline compound, Co2Cl6(NH3)12, obtained by the action of ammonium chloride on an ammoniacal solution of cobaltic chloride.

limes at 356º Fahrenheit. It is sometimes found native, but usually combined with silver, cobalt, nickel, iron, antimony, or sulphur. Orpiment and realgar are two of its sulphur compounds, the first of which is the true arsenticum of the ancients. The element and its compounds are active poisons. Specific gravity from…

A popular term for a bright-hued variety of some minerals; as, the rose-red cobalt bloom.

An apple-green mineral, a hydrous arseniate of nickel, cobalt, and magnesia; -- so named from the Sierra Cabrera, Spain.

A greenish blue pigment prepared in various ways, consisting essentially of cobalt stannate. Unlike other cobalt blues, it does not change color by gaslight.

) Same as Dragon's blood. -- Green cinnabar, a green pigment consisting of the oxides of cobalt and zinc subjected to the action of fire. -- Hepatic cinnabar (Min.), an impure cinnabar of a liver-brown color and submetallic luster.

A cobaltiferous variety of arsenopyrite.

A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing. The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe.…

position of erythrin; -- called also erythrol, erythroglucin, erythromannite, pseudorcin, cobalt bloom, and under the name phycite obtained from the alga Protococcus vulgaris. It is a tetrabasic alcohol, corresponding to glycol and glycerin.

copper glance. Glance coal, anthracite; a mineral composed chiefly of carbon. -- Glance cobalt, cobaltite, or gray cobalt. -- Glance copper, c -- Glance wood, a hard wood grown in Cuba, and used for gauging instruments, carpenters' rules, etc. McElrath.

A metallic mineral having a grayish tin-white color, and containing cobalt and iron, with sulphur and arsenic.

ence. Ames. Gray antimony (Min.), stibnite. -- Gray buck (Zoöl.), the chickara. -- Gray cobalt (Min.), smaltite. -- Gray copper (Min.), tetrahedrite. -- Gray duck (Zoöl.), the gadwall; also applied to the female mallard. -- Gray falcon (Zoöl.) the peregrine falcon. -- Gray Friar. See Franciscan, and Friar. -- Gr…

the chief, ingredient of meteorites. It invariably contains a small amount of nickel and cobalt. Cf. Meteorite. -- Pig iron, the form in which cast iron is made at the blast furnace, being run into molds, called pigs. -- Reduced iron. See under Reduced. -- Specular iron. See Hematite. -- Too many irons in the fire…

See Cobalt.

d metallic luster, occurring in isometric crystals, and also massive. It is a sulphide of cobalt containing some nickel or copper.