_*Extractum Belladonnae Foliorum (Ext. Bellad. Fol.), Extract of Belladonna Leaves, U.S.P._--One Gm. extract represents about 4 Gm. belladonna leaves and yields about 1.25 per cent. of alkaloids. Two forms: pilular extract of belladonna leaves and powdered extract of belladonna leaves. DOSAGE: 0.015 Gm. or 1/4 grain (U.S.P.). _*Tinctura Belladonnae Foliorum (Tr. Bellad. Fol.), Tincture of Belladonna Leaves, U.S.P._ (Belladonnae Tinctura, P.I.)--Belladonna leaves (10%) yielding about 0.03 per cent. of alkaloids in alcohol. Absolute alcohol content about 47 per cent. DOSAGE: 0.75 Cc. or 12 minims (U.S.P.). _*Unguentum Belladonnae (Ung. Bellad.), Belladonna Ointment, U.S.P._--Pilular extract of belladonna leaves (10%) in diluted alcohol, hydrous wool fat and benzoinated lard. =Belladonnae Radix (Bellad. Rad.), Belladonna Root, U.S.P.= (Deadly Nightshade Root).--Yields not less than 0.45 per cent. of mydriatic alkaloids. ACTION AND USES: Those of the hyoscyamine and atropine (which see) contained therein. DOSAGE: 0.045 Gm. or 3/4 grain (U.S.P.). _Fluidextractum Belladonnae Radicis (Fldext. Bellad. Rad.), Fluidextract of Belladonna Root, U.S.P._--Belladonna root (100%) yielding about 0.45 per cent. of alkaloids. Absolute alcohol content about 75 per cent. DOSAGE: 0.05 Cc. or 1 minim (U.S.P.). _Linimentum Belladonnae (Lin. Bellad.), Belladonna Liniment, U.S.P._--Fluidextract of belladonna root (about 95%) and camphor (5%). Absolute alcohol content about 70 per cent. USES: A mildly analgesic and rubefacient application. =Benzaldehydum (Benzaldehyd.), Benzaldehyde, U.S.P.=--Produced synthetically or obtained from oil of bitter almonds. A colorless or yellowish liquid, with a bitter-almond odor and a burning, aromatic taste. Slightly soluble in water; miscible with alcohol, ether, and fixed or volatile oils. ACTION AND USES: Flavoring agent. DOSAGE: 0.03 Cc. or 1/2 minim (U.S.P.). =Benzinum Purificatum (Benzin. Purif.), Purified Petroleum Benzin, U.S.P.= (Petroleum Ether). A clear, colorless liquid, with an ethereal or faint petroleum odor; highly inflammable. Practically insoluble in water, freely soluble in alcohol and miscible with ether, chloroform, volatile oils and fixed oils with the exception of castor oil. ACTION AND USES: Pharmaceutic solvent. =*Benzoinum (Benzoin.), Benzoin, U.S.P.= (Gum Benjamin).--A balsamic resin. ACTION AND USES: Used locally to promote healing, and in inhalations as an expectorant. DOSAGE: 1 Gm. or 15 grains (U.S.P.). _Tinctura Benzoini (Tr. Benz.), Tincture of Benzoin, U.S.P._--Benzoin (20%) in alcohol. Absolute alcohol content about 83 per cent. DOSAGE: 1 Cc. or 15 minims (U.S.P.). _*Tinctura Benzoini Composita (Tr. Benz. Co.), Compound Tincture of Benzoin, U.S.P._--Benzoin (10%), aloes (2%), storax (8%), balsam of tolu (4%), in alcohol. Absolute alcohol content about 80 per cent.