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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.

ing, or relating to the power of producing heat; -- applied to foods which, being rich in carbon, as the fats, are supposed to give rise to heat in the animal body by oxidation.

s, also massive, generally of a yellow color, containing silica, alumina, lime, soda, and carbon dioxide.

a standard candle. Electric candle, A modification of the electric arc lamp, in which the carbon rods, instead of being placed end to end, are arranged side by side, and at a distance suitable for the formation of the arc at the tip; - - called also, from the name of the inventor, Jablockoff candle. -- Excommunication…

An inflammable, volatile, oily, liquid hydrocarbon, obtained by the destructive distillation of caoutchouc.

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

An isocyanide of a hydrocarbon radical. The carbamines are liquids, usually colorless, and of unendurable odor.

Containing, or derived from, carbon and nitrogen. Carbazotic acid (Chem.), picric acid. See under Picric.

A binary compound of carbon with some other element or radical, in which the carbon plays the part of a negative; -- formerly termed carburet.

nds including the sugars, starches, and gums, which contain six (or some multiple of six) carbon atoms, united with a variable number of hydrogen and oxygen atoms, but with the two latter always in proportion as to form water; as dextrose, C6H12O6.

A hydrocarbon.

To apply carbonic acid to; to wash or treat with carbolic acid.

A beautiful crystalline compound, SiC, consisting of carbon and silicon in combination; carbon silicide. It is made by heating carbon and sand together in an electric furnace. The commercial article is dark-colored and iridescent. It is harder than emery, and is used as an abrasive.

A compound of carbon and oxygen, as carbonyl, with some element or radical; as, potassium carboxide. Potassium carboxide, a grayish explosive crystalline compound, C6O6K, obtained by passing carbon monoxide over heated potassium.

CO.OH, regarded as the essential and characteristic constituent which all oxygen acids of carbon (as formic, acetic, benzoic acids, etc.) have in common; -- called also oxatyl.

To combine or to impregnate with carbon, as by passing through or over a liquid hydrocarbon; to carbonize or carburize. By carbureting the gas you may use poorer coal. Knight.

Combined with carbon in the manner of a carburet or carbide.

n apparatus in which coal gas, hydrogen, or air is passed through or over a volatile hydrocarbon, in order to confer or increase illuminating power. [Written also carburettor.]

To combine wtih carbon or a carbon compound; -- said esp. of a process for conferring a higher degree of illuminating power on combustible gases by mingling them with a vapor of valatile hydrocarbons.

Highly carbonized iron, the direct product of the blast furnace; -- used for making castings, and for conversion into wrought iron and steel. It can not be welded or forged, is brittle, and sometimes very hard. Besides carbon, it contains sulphur, phosphorus, silica, etc.