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ng), a deep blue liquid used in dyeing, and obtained by dissolving indigo in concentrated sulphuric acid. Brande & C. -- Saxon green (Dyeing), a green color produced by dyeing with yellow upon a ground of Saxon blue.

A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic- looking substance. It exhibits under the action of light a remark…

A white crystalline nitrogenous substance obtained by the action of dilute sulphuric acid on silk gelatin.

A sulphide, analogous to a sesquioxide, containing three atoms of sulphur to two of the other ingredient; -- formerly called also sesquisulphuret; as, orpiment, As2S3 is arsenic sesquisulphide.

eable, and capable of a high degree of polish. It is found native, and also combined with sulphur, arsenic, antimony, chlorine, etc., in the minerals argentite, proustite, pyrargyrite, ceragyrite, etc. Silver is one of the "noble" metals, so-called, not being easily oxidized, and is used for coin, jewelry, plate, and a…

rn the surface of; to burn the ends or outside of; as, to singe the hair or the skin. You sulphurous and thought-executing fires, . . . Singe my white head! Shak. I singed the toes of an ape through a burning glass. L'Estrange.

Impure dark-colored sulphuric acid that has been used in the refining of petroleum.

A sulphur mine.

A volcanic area or vent which yields only sulphur vapors, steam, and the like. It represents the stages of the volcanic activity.

imber. -- Spanish feretto, a rich reddish brown pigment obtained by calcining copper and sulphur together in closed crucibles. -- Spanish flag (Zoöl.), the California rockfish (Sebastichthys rubrivinctus). It is conspicuously colored with bands of red and white. -- Spanish fly (Zoöl.), a brilliant green beetle, comm…

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.

cal basis of sponge tissue, a nitrogenous, hornlike substance which on decomposition with sulphuric acid yields leucin and glycocoll.

the state of vapor, which, on cooling, returns again to the solid state; as, to sublimate sulphur or camphor.

A nonacid compound consisting of one equivalent of sulphur and more than one equivalent of some other body, as a metal.

An acid in which, to a greater or less extent, sulphur plays a part analogous to that of oxygen in an oxyacid; thus, thiosulphuric and sulpharsenic acids are sulphacids; -- called also sulphoacid. See the Note under Acid, n., 2.

ated to, a sulphamide; specifically, designating an amido acid derivative, NH2.SO2.OH, of sulphuric acid (analogous to sulphonic acid) which is not known in the free state, but is known in its salts.

Any one of a series of amido compounds obtained by treating sulphuryl chloride with various amines.

A salt of sulphuric acid.

A binary compound of sulphur, or one so regarded; -- formerly called sulphuret. Double sulphide (Chem.), a compound of two sulphides. -- Hydrogen sulphide. (Chem.) See under Hydrogen. -- Metallic sulphide, a binary compound of sulphur with a metal.

o, or designating, a sulphonic acid obtained, as a blue solution, by dissolving indigo in sulphuric acid; -- formerly called also cerulic sulphuric acid, but properly called indigo-disulphonic acid.