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of water gas. It is fatal to animal life, extinguishes combustion, and burns with a pale blue flame, forming carbon dioxide.

Native strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms.

large genus of composite plants, related to the thistles and including the cornflower or bluebottle (Centaurea Cyanus) and the star thistle (C. Calcitrapa).

Blue; cerulean. [Obs.] Dyer.

Sky-colored; blue; azure. Cowper. Blue, blue, as if that sky let fall A flower from its cerulean wall. Bryant.

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

Producing a blue or sky color. [R.]

A dingy blue, or grayish black, variety of spinel. It is also called pleonaste. [Written also ceylonite.]

Native blue vitriol. See Blue vitriol, under Blue.

Steel blue; of the color of tempered steel.

ngels, variously represented in art. In European painting the cherubim have been shown as blue, to denote knowledge, as distinguished from the seraphim (see Seraph), and in later art the children's heads with wings are generally called cherubs.

A branching perennial plant (Cichorium Intybus) with bright blue flowers, growing wild in Europe, Asia, and America; also cultivated for its roots and as a salad plant; succory; wild endive. See Endive.

A sensation of cold with convulsive shaking of the body, pinched face, pale skin, and blue lips, caused by undue cooling of the body or by nervous excitement, or forming the precursor of some constitutional disturbance, as of a fever.

el painting, and glass staining. (b) A pigment made by mixing chrome yellow with Prussian blue. -- Chrome red, a beautiful red pigment originally prepared from the basic chromate of lead, but now made from red oxide of lead. -- Chrome yellow, a brilliant yellow pigment, PbCrO4, used by painters.

lied to napthalene and anthracene. It is a white crystalline substance, C18H12, of strong blue fluorescence, but generally colored yellow by impurities.

A hydrous silicate of copper, occurring massive, of a blue or greenish blue color.

l 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. (Min.) Se…

ce. 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 dried in the air, owing to absorbed moisture, and becoming bright blue when warmed.

A variety of American grape, with large dark blue (almost black) grapes in compact clusters.

us solution or as test paper (Congo paper) for the detection of free acid, which turns it blue.