=Cerevisiae Fermentum Compressum (Cerev. Ferm. Compr.), Compressed Yeast, N.F.=--The commercial compressed yeast. ACTION AND USES: For use in making fermented milk (Lac Fermentatum), which see under =Lac Vaccinum=. =Cerii Oxalas (Cerii Oxal.), Cerium Oxalate, U.S.P.=--A mixture of the oxalates of cerium, didymium, lanthanum, and other associated elements. White or pinkish, odorless, tasteless powder. Insoluble in water, alcohol and ether. ACTION AND USES: Formerly used for the treatment of chronic vomiting but probably without value. DOSAGE: 0.2 Gm. or 3 grains (U.S.P.), in powders, cachets or capsules. =Cetaceum (Cetac.), Spermaceti, U.S.P.=--A solid fat from the sperm whale. White, nearly odorless, unctuous masses, with a bland, mild taste. Insoluble in water and nearly insoluble in cold alcohol. ACTION AND USES: Used as a component of cerates and cold creams. =CHARTAE, PAPERS.=--Papers are pieces of unsized paper saturated with or pieces of hard-surfaced papers coated with a medicinal substance. =Chimaphila (Chimaph.), Chimaphila, N.F.= (Pipsissewa).--Leaves. ACTION AND USES: Obsolete; no definite indications for its use. Has been described as "tonic, astringent, diuretic." DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Chimaphilae (Fldext. Chimaphil.), Fluidextract of Chimaphila, N.F._--Chimaphila (100%). Absolute alcohol content about 40 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.). =Chionanthus (Chionanth.), Chionanthus, N.F.= (Fringe Tree Bark).--Bark of the root. ACTION AND USES: Obsolete; no definite indications for its use. Formerly used by eclectics and homeopaths in hepatic disorders and syphilis. DOSAGE: 2 Gm. or 30 grains (N.F.). _Fluidextractum Chionanthi (Fldext. Chionanth.), Fluidextract of Chionanthus, N.F._--Chionanthus (100%). Absolute alcohol content about 60 per cent. DOSAGE: 2 Cc. or 30 minims (N.F.) =Chirata (Chirat.), Chirata, N.F.= (Chiretta).--Plant. ACTION AND USES: Bitter stomachic, similar to and without advantage over gentian. DOSAGE: 1 Gm. or 15 grains (N.F.). _Fluidextractum Chiratae (Fldext. Chirat.), Fluidextract of Chirata, N.F._--Chirata (100%). Absolute alcohol content about 40 per cent. DOSAGE: 1 Cc. or 15 minims (N.F.). =Chloral Camphoratum (Chloral Camph.), Camphorated Chloral, N.F.=--Equal parts of hydrated chloral and camphor. An oily liquid with a camphoraceous odor. ACTION AND USES: Local rubefacient and analgesic =*Chloralum Hydratum (Chloral. Hydrat.), Hydrated Chloral, U.S.P.= ("Chloral," Chloral Hydrate).--CCl{3}.CHO + H{2}O. Colorless, transparent crystals, with an aromatic, penetrating odor and a bitterish, caustic taste. Very soluble in water (1:0.25) and in alcohol (1:1.3).