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(Chem.), the heavy oil obtained in the distillation of coal tar, and containing phenol, naphthalus, etc. -- Dead plate (Mach.), a solid covering over a part of a fire grate, to prevent the entrance of air through that part. -- Dead pledge, a mortgage. See Mortgage. -- Dead point. (Mach.) See Dead center. -- Dead r…

y of several explosive mixtures, chiefly of ammonium nitrate and a nitrate derivative of naphthalene. They are stable, but require protection from moisture. As prepared it is a compressed cylinder of the explosive, filled with loose powder of the same composition, all inclosed in waterproof wrappers. It is used for min…

paration of glue and acetic acid oralcohol. -- Marine glue, a solution of caoutchouc in naphtha, with shellac, used in shipbuilding.

The gas used may be a fixed gas, or one derived from alcohol, ether, gasoline (petrol), naphtha, oil (petroleum), etc. There are three main classes: (1) gas engines proper, using fixed gases, as coal, blast-furnace, or producer gas; (2) engines using the vapor of a volatile fluid, as the typical gasoline (petrol) engi…

A nitrogenous base C10H9N, extracted from coal-tar naphtha, as an oily liquid. It is a member of the quinoline series, and is probably identical with lepidine.

uickly drying black lacquer or varnish, consisting essentially of asphaltum dissolved in naphtha or turpentine, and used for coating ironwork; -- called also Brunswick black, Japan lacquer, or simply Japan. -- Japan camphor, ordinary camphor brought from China or Japan, as distinguished from the rare variety called bo…

largest size belonging to a ship of war; also, an open boat of any size driven by steam, naphtha, electricity, or the like. Launching ways. (Naut.) See Way, n. (Naut.).

Designating an orange-red dyestuff obtained from naphthylamine, and called magdala red, naphthalene red, etc.

ces all inorganic objects, as distinguished from plants or animals. -- Mineral oil. See Naphtha, and Petroleum. -- Mineral paint, a pigment made chiefly of some natural mineral substance, as red or yellow iron ocher. -- Mineral patch. See Bitumen, and Asphalt. -- Mineral right, the right of taking minerals from lan…

A compound of naphthalene or its radical with a metallic element; as, mercuric naphthide.

Pertaining to, derived from, or related to, naphthalene; -- used specifically to designate any one of a series of carboxyl derivatives, called naphthoic acids.

Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.…

A yellow crystalline substance, C10H6O2, analogous to quinone, obtained by oxidizing naphthalene with chromic acid.

A hydrocarbon radical regarded as the essential residue of naphthalene.

One of two basic amido derivatives of naphthalene, C10H7.NH2, forming crystalline solids.

derable range of products, including benzine and ligroin. The terms petroleum ether, and naphtha, are sometimes applied to the still more volatile products, including rhigolene, gasoline, cymogene, etc.

Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances. Phthalic acid (Chem.), a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

(C6H7N) related to pyridine, and obtained from bone oil, acrolein ammonia, and coal-tar naphtha, as colorless mobile liquids of strong odor; -- called also methyl pyridine.

ve Nations. Seneca grass(Bot.), holy grass. See under Holy. -- Seneca eil, petroleum or naphtha. -- Seneca root, or Seneca snakeroot (Bot.), the rootstock of an American species of milkworth (Polygala Senega) having an aromatic but bitter taste. It is often used medicinally as an expectorant and diuretic, and, in lar…

teless white crystalline powder, by the oxidation of oil of turpentine; -- called also paraphthalic acid. Cf. Phthalic.