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Native sulphate of barium, a mineral occurring in transparent, colorless, white to yellow crystals (generally tabular), also in granular form, and in compact massive forms resembling marble. It has a high specific gravity, and hence is often called heavy spar. It is a common mineral in metallic veins.…

Barium sulphate, generally called heavy spar or barite. See Barite.

ith no sharply defined chemical characteristics. -- Bitter salt, Epsom salts;; magnesium sulphate. -- Bitter vetch (Bot.), a name given to two European leguminous herbs, Vicia Orobus and Ervum Ervilia. -- To the bitter end, to the last extremity, however calamitous.

A hydrous sulphate of magnesium and sodium.

cine. The timber is very useful. See Eucalyptus. -- Blue jack, Blue stone, blue vitriol; sulphate of copper. -- Blue jacket, a man-of war's man; a sailor wearing a naval uniform. -- Blue jaundice. See under Jaundice. -- Blue laws, a name first used in the eighteenth century to describe certain supposititious laws o…

chopped fine and inclosed in a skin. -- Bologna stone (Min.), radiated barite, or barium sulphate, found in roundish masses composed of radiating fibers, first discovered near Bologna. It is phosphorescent when calcined. -- Bologna vial, a vial of unannealed glass which will fly into pieces when its surface is scratc…

A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.

To impregnate with a preservative solution of copper sulphate, as timber, railroad ties, etc.

A basic sulphate of copper, occurring in emerald-green crystals.

A hydrous sulphate of copper and lead, found in some parts of Caledonia or Scotland.

Native strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms.

2SO4.24H2O, analogous to, and crystallizing like, common alum. It is regarded as a double sulphate of chromium and potassium. -- Chrome green (a) The green oxide of chromium, Cr2O3, used in enamel painting, and glass staining. (b) A pigment made by mixing chrome yellow with Prussian blue. -- Chrome red, a beautiful r…

Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.

A mineral consisting principally of sulphate of iron; white copperas; -- so called because found in the province of Coquimbo, Chili.

s the cube root of 27, for 3x3x3 = 27. -- Cube spar (Min.), anhydrite; anhydrous calcium sulphate.

Native sulphate of copper. Cf. Blue vitriol, under Blue.

(b) A molecular combination of two distinct salts, as common alum, which consists of the sulphate of aluminium, and the sulphate of potassium or ammonium. -- Double shuffle, a low, noisy dance. -- Double standard (Polit. Econ.), a double standard of monetary values; i. e., a gold standard and a silver standard, both…

United States, with sugar of milk, but in England (as formerly in the United States) with sulphate of potash, and in France (as in Dr. Dover's original prescription) with nitrate and sulphate of potash and licorice. It is an anodyne diaphoretic.

Sulphate of magnesia having cathartic qualities; -- originally prepared by boiling down the mineral waters at Epsom, England, -- whence the name; afterwards prepared from sea water; but now from certain minerals, as from siliceous hydrate of magnesia.

Native sulphate of magnesia or Epsom salt.