Carbon

(kar'-bon). Charcoal. C 12; quant i valence II, IV. A non-metal occurring in the various forms of diamond, graphite or " black lead," and charcoal. In medicine only the last named form is.employed, which may be, C, Animal, useful as a deodorant and disinfectant, as it readily absorbs and aids in oxidizing many gases. It is used internally to absorb fermenting products of digestion. Carbo animal., purificat., purified animal charcoal. Dose j. C. Cataplasm a (B. P.), charcoal poultice; wood-charcoal I, bread-crumb I, linseed meal 3, boiling water 20. C. dioxid, the acid, gaseous product, having the composition of commonly known as " carbonic acid gas," or carbonic acid. It is a colorle gas having a sp. gr. of 1.52, soluble in cold water, and po e ing a pungent smell and an acid taste. Inhaled, it destroys animal life by asphyxiation. In solution, it is an excellent refrigerant and stomachic. Its inhalation is fatal in a short time, even when diluted with 95 parts of air. It is a product of respiration. It is used in medicine for inhalation in whooping cough, asthma, and to stop hiccough. It is also used as a local anesthetic in minor surgery. C. disulphid, bisulphid of carbon, a colorle , transparent liquid of offensive odor, highly inflammable, very poisonous. A good solvent for caoutchouc. A diluted spray of it is recommended in diphtheria. Carbo ligni, wood charcoal. C. monoxid, CO, carbonic oxid, a colorle , tastele , and inodorous gas, one of the products of imperfect combustion. When inhaled it is actively poisonous. C. tetra chlorid, anesthetic, recommended locally for asthma, by inhalation. Unof. See Anesthetic . C. oxy sulphid, a body, COS, formed by conducting sulphur vapor and carbon monoxid through red-hot tubes; it is a colorle gas, with a faint and peculiar odor. It unites readily with air, forming an explosive mixture. It is soluble in an equal volume of water. It is present in the waters of some mineral springs.