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Bead :: Bead (n.) A glassy drop of molten flux, as borax or microcosmic salt, used as a solvent and color test for several mineral earths and oxides, as of iron, manganese, etc., before the blowpipe; as, the borax bead; the iron bead, etc..

Blowpipe :: Blowpipe (n.) A blowgun; a blowtube.

Diaspore :: Diaspore (n.) A hydrate of alumina, often occurring in white lamellar masses with brilliant pearly luster; -- so named on account of its decrepitating when heated before the blowpipe..

Blowgun :: Blowgun (n.) A tube, as of cane or reed, sometimes twelve feet long, through which an arrow or other projectile may be impelled by the force of the breath. It is a weapon much used by certain Indians of America and the West Indies; -- called also blowpipe, and blowtube. See Sumpitan..

Reaction :: Reaction (n.) The mutual or reciprocal action of chemical agents upon each other, or the action upon such chemical agents of some form of energy, as heat, light, or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame..

Pyrochlore :: Pyrochlore (n.) A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish color and resinous luster; -- so called from its becoming grass-green on being subjected to heat under the blowpipe..

Pyrognostic :: Pyrognostic (a.) Of or pertaining to characters developed by the use of heat; pertaining to the characters of minerals when examined before the blowpipe; as, the pyrognostic characters of galena..

Pyritology :: Pyritology (n.) The science of blowpipe analysis.

Zeolite :: Zeolite (n.) A term now used to designate any one of a family of minerals, hydrous silicates of alumina, with lime, soda, potash, or rarely baryta. Here are included natrolite, stilbite, analcime, chabazite, thomsonite, heulandite, and others. These species occur of secondary origin in the cavities of amygdaloid, basalt, and lava, also, less frequently, in granite and gneiss. So called because many of these species intumesce before the blowpipe..

Pyrosmalite :: Pyrosmalite (n.) A mineral, usually of a pale brown or of a gray or grayish green color, consisting chiefly of the hydrous silicate of iron and manganese; -- so called from the odor given off before the blowpipe..

Aethogen :: Aethogen (n.) A compound of nitrogen and boro/, which, when heated before the blowpipe, gives a brilliant phosphorescent; boric nitride..

Enamel :: Enamel (v. t.) A glassy, opaque bead obtained by the blowpipe..

Blowtube :: Blowtube (n.) A long wrought iron tube, on the end of which the workman gathers a quantity of metal (melted glass), and through which he blows to expand or shape it; -- called also blowing tube, and blowpipe..

Intumesce :: Intumesce (v. i.) To enlarge or expand with heat; to swell; specifically, to swell up or bubble up under the action of heat, as before the blowpipe..

Blowpipe :: Blowpipe (n.) A tube for directing a jet of air into a fire or into the flame of a lamp or candle, so as to concentrate the heat on some object..

Pyrognostics :: Pyrognostics (n. pl.) The characters of a mineral observed by the use of the blowpipe, as the degree of fusibility, flame coloration, etc..

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