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Any one of the four substances, sulphur, sal ammoniac, quicksilver, or arsenic (or, according to some, orpiment). The four spirits and the bodies seven. Chaucer.

A crystalline mineral found in guano. It is a hydrous phosphate of magnesia and ammonia.

of its parts replaced; as, alcohol is a substituted water; methyl amine is a substituted ammonia. Substituted executor (Law), an executor appointed to act in place of one removed or resigned.

alline nitrogenous substance, C2H4.(CO)2.NH, obtained by treating succinic anhydride with ammonia gas. It is a typical imido acid, and forms a series of salts. See Imido acid, under Imido.

. Knight. -- Tar water. (a) A cold infusion of tar in water, used as a medicine. (b) The ammoniacal water of gas works. -- Wood tar, tar obtained from wood. It is usually obtained by the distillation of the wood of the pine, spruce, or fir, and is used in varnishes, cements, and to render ropes, oakum, etc., impervio…

beet roots, etc., with a characteristic herringlike odor. It is regarded as a substituted ammonia containing three methyl groups.

ree atoms of hydrogen; -- said of triad atoms or radicals; thus, nitrogen is trivalent in ammonia.

or compounds, without the elimination of any side product; thus, aldehyde, ethylene, and ammonia are unsaturated.

A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate. It is used somewhat in medicine as a hypnotic. By extension, any one of the series of related substances of which urethane proper is the type.

in small quantity in the urine of man and most mammals. Combined in the form of urate of ammonia, it is the chief constituent of the urine of birds and reptiles, forming the white part. Traces of it are also found in the various organs of the body. It is likewise a common constituent, either as the free acid or as a u…

designating, an acid which is obtained as a white crystalline substance by the action of ammonia on pyrotartaric acid.

A base, C10H19N, produced by heating valeric aldehyde with ammonia. It is probably related to the conine alkaloids.

(Old Chem.) See under Alkali. -- Volatile liniment, a liniment composed of sweet oil and ammonia, so called from the readiness with which the latter evaporates. -- Volatile oils. (Chem.) See Essential oils, under Essential.

A solution in water of a gaseous or readily volatile substance; as, ammonia water. U. S. Pharm.

minous or proteid matter. It is changed to a deep orange- yellow color by the addition of ammonia.

-- Zinc amine (Chem.), a white amorphous substance, Zn(NH2)2, obtained by the action of ammonia on zinc ethyl; -- called also zinc amide. -- Zinc amyle (Chem.), a colorless, transparent liquid, composed of zinc and amyle, which, when exposed to the atmosphere, emits fumes, and absorbs oxygen with rapidity. -- Zinc…