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The coalfish (Pollachius carbonarius). [Written also cudden.]

A colorless oily hydrocarbon, C6H5.C3H7, obtained by the distillation of cuminic acid; -- called also cumol.

ming an alkaline cyanide when nitrogen or a nitrogenous compound is strongly ignited with carbon and soda or potash. It conducts itself like a member of the halogen group of elements, and shows a tendency to form complex compounds. The name is also applied to the univalent radical, CN (the half molecule of cyanogen pro…

A colorless, liquid, combustible hydrocarbon, CH3.C6H4.C3H7, of pleasant odor, obtained from oil of cumin, oil of caraway, carvacrol, camphor, etc.; -- called also paracymene, and formerly camphogen.

formed in coal mines, old wells, pints, etc. Choke damp, a damp consisting principally of carboniCarbonic acid, under Carbonic. -- Damp sheet, a curtain in a mine gallery to direct air currents and prevent accumulation of gas. -- Fire damp, a damp consisting chiefly of light carbureted hydrogen; -- so called from its…

A hydrous carbonate of alumina and soda, occuring in white, bladed crustals.

A liquid hydrocarbon, C10H22, of the paraffin series, including several isomeric modifications.

To deprive of carbon; to remove the carbon from.

One of the higher hydrocarbons, C10H20, of the ethylene series.

One of the higher hydrocarbons, C10H15, of the acetylene series; -- called also decenylene.

A hydrocarbon radical, C10H21, never existing alone, but regarded as the characteristic constituent of a number of compounds of the paraffin series.

ed as derived from it; thus, the amido compounds are derivatives of ammonia, and the hydrocarbons are derivatives of methane, benzene, etc.

al or theoretical substitution; as, to derive an organic acid from its corresponding hydrocarbon.

the Devonian rocks, period, or system. Devonian age (Geol.), the age next older than the Carboniferous and later than the Silurian; -- called also the Age of fishes. The various strata of this age compose the Devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants…

A volatile, pungent, liquid hydrocarbon, C6H10, consisting of two allyl radicals, and belonging to the acetylene series.

Native carbonate of manganese; rhodochrosite.

A liquid hydrocarbon, C10H20, of the ethylene series, regarded as a polymeric form of amylene.

A liquid hydrocarbon, C8H18, of the marsh-gas series, being one of several octanes, and consisting of two butyl radicals. Cf. Octane.

Crystallization in two independent forms of the same chemical compound, as of calcium carbonate as calcite and aragonite.

A colorless, crystalline hydrocarbon, C20H14, obtained from naphthylene, and consisting of a doubled naphthylene radical.