Methyl

(inethf-il) \_perd, with; vA tj, wood], CH3. A univalent hydrocarbon radicle, the first of the univalent hydrocarbons of the marsh-gas series; the radicle of methyl alcohol. M. Alcohol, CH3OH, wood-alcohol, wood-spirit, a liquid similar to ordinary alcohol, obtained in the destructive distillation of wood. M.-blue. See Methylene-blue. M. Ether, C9H60; dimethyl oxid, an inflammable gas; also, a salt of methyl. M. -green, an anilin dye, used in staining ti ues; also, as an antiperiodic. M.-guanidin, C2H-N3; a colorle , crystalline, strongly alkaline base, formed by the oxidation of kreatin and kreatinin, and also found in decomposing horseflesh, and in cultures of the comma-bacillus and the bacillus of anthrax. It is highly poisonous. M. hydrid, CH4; methane, or marsh-gas. M. salicylas (U. S. P.), C8H803; artificial oil of wintergreen; an oily liquid of a peculiar odor, identical with the e ential constituent of the oil of wintergreen; it is used in rheumatism like the natural oil of gaultheria. M.-theobromin, caffein. M.-uramin. See M.-guanidin. M. -violet, an anilin dye used for staining bacteria. Under the name of pyoktanin it is used as an antiseptic. 392