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The alkali produced from the plant, being an impure carbonate of soda, used for making soap, glass, etc., and for bleaching purposes.

eral of a white or gray color, occurring massive or crystallized. It is a compound of the carbonates of barium and calcium.

A pale blue pigment, prepared from the native blue carbonate of copper, or from smalt; -- called also blue bice. Green bice is prepared from the blue, by adding yellow orpiment, or by grinding down the green carbonate of copper. Cooley. Brande & C.

Hydrous carbonate of bismuth, an earthy mineral of a dull white or yellowish color. [Written also bismuthite.]

An earthy carbonate of iron containing considerable carbonaceous matter; -- valuable as an iron ore.

calcified tissue of the skeleton of vertebrate animals, consisting very largely of calcic carbonate, calcic phosphate, and gelatine; as, blood and bone.

A thin bed of coal mixed with pyrites or carbonate of lime.

A carbonate of baryta and lime, intermediate between witherite and strontianite; -- called also alstonite.

An oxychloride of copper, used as a green pigment; also, a carbonate of copper similarly employed.

Partaking of the nature ofcalcite or calcium carbonate; consisting of, or containg, calcium carbonate or carbonate of lime. Clcareous spar. See as Calcite.

Bearing producing, or containing calcite, or carbonate of lime. Calciferouse epoch (Geol.), and epoch in the American lower Silurian system, immediately succeeding the Cambrian period. The name alludes to the peculiar mixture of calcareous and siliceous characteristics in many of the beds. See the Diagram under Grology…

esp. by the expulsion of some volatile matter, as when carbonic and acid is expelled from carbonate of calcium in the burning of limestone in order to make lime.

Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.

ot existing in the free state, but occurring as a salt of ammonium in commercial ammonium carbonate; -- called also amido formic acid.

not existing separately, which, combined with positive or basic atoms or radicals, forms carbonates. On common language the term is very generally applied to a compound of carbon and oxygen, CO2, more correctly called carbon dioxide. It is a colorless, heavy, irrespirable gas, extinguishing flame, and when breathed de…

The native carbonate of lead.

Native lead carbonate; a mineral occurring in colorless, white, or yellowish transparent crystals, with an adamantine, also massive and compact.

t, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone.

Native iron carbonate; -- usually called siderite.

A whitish marble, from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc.