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Crude native borax, formerly imported from Thibet. It was once the chief source of boric compounds. Cf. Borax.

ve a lower tone to. (b) (Paint.) To modify, as color, by making it less brilliant or less crude; to modify, as a composition of color, by making it more harmonius. Its thousand hues toned down harmoniusly. C. Kingsley.

em.), a large tower or chamber used in the manufacture of sulphuric acid, to condense the crude acid and to deliver concentrated acid charged with nitrous fumes. These fumes, as a catalytic, effect the conversion of sulphurous to sulphuric acid. See Sulphuric acid, under Sulphuric, and Gay Lussac's tower, above. -- Ro…

A hydrocarbon, C13H28, of the methane series, which is a probable ingredient both of crude petroleum and of kerosene, and is produced artificially as a light colorless liquid.

Crude zinc. [India]

d as a sublimation product in the flues of smelting furnaces of zinc, and consisting of a crude zinc oxide.

nt substance, almost odorless and tasteless, obtained as a residue in the purification of crude petroleum, and consisting essentially of a mixture of several of the higher members of the paraffin series. It is used as an unguent, and for various purposes in the arts. See the Note under Petrolatum. [Written also vaselin…

Worked; elaborated; not rough or crude. Wrought iron. See under Iron.

carbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively orthoxylene, metaxylene, and paraxylene. Called also xylol.

, obtained as a white crystalline substance by the action of sodium and carbon dioxide on crude xylenol.

A liquid hydrocarbon found in crude wood spirits.

ly by roasting cobalt glance with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is distinct, as it contains no…