Translucent, nearly colorless, waxy solid with a characteristic odor, becoming white, red or black on the surface on long keeping. Readily inflammable in air (preserved under water). Almost insoluble in water, to which phosphorus imparts its characteristic odor and taste; slightly soluble in dehydrated alcohol (1:400) and soluble in chloroform (1:17). ACTION AND USES: In rickets for stimulation of bone formation. Its use as "nerve-food" is irrational. DOSAGE: 0.5 mg. or 1/120 grain (U.S.P.). May be administered in pills or as phosphorated oil (1:100). The preparations are unreliable unless they have been recently made, since phosphorus rapidly loses its efficiency through oxidation. _Elixir Phosphori (Elix. Phosphor.), Elixir of Phosphorus, N.F._--Phosphorus (0.025%) and chloroform in alcohol, glycerin and water flavored with compound spirit of orange and oil of anise. Absolute alcohol content about 32 per cent. Deteriorates rapidly. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Elixir Phosphori et Nucis Vomicae (Elix. Phosphor. et Nuc. Vom.), Elixir of Phosphorus and Nux Vomica, N.F._--Tincture of nux vomica (3.5%) and elixir of phosphorus. Absolute alcohol content about 32 per cent. USES: An irrational "tonic." DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Liquor Phosphori (Liq. Phosphor.), Solution of Phosphorus, N.F._ (Thompson's Solution of Phosphorus).--Phosphorus (0.07%) in glycerin and dehydrated alcohol flavored with spirit of peppermint. Absolute alcohol content about 35 per cent. DOSAGE: 0.6 Cc. or 10 minims (N.F.). _Oleum Phosphoratum (Ol. Phosphorat.), Phosphorated Oil, N.F._--Phosphorus (1%), dissolved in ether and added to expressed oil of almond. DOSAGE: 0.05 Cc. or 1 minim (N.F.). _Pilulae Phosphori (Pil. Phosphor.), Pills of Phosphorus, U.S.P._--Each pill should contain phosphorus (0.6 mg. or 1/100 grain) coated with tolu. DOSAGE: 1 pill (U.S.P.). =Physostigma (Physostig.), Physostigma, U.S.P.= (Calabar Bean, Ordeal Bean).--Yields not less than 0.15 per cent. of alkaloids (chiefly physostigmine). ACTION AND USES: Antitetanic, antineuralgic, peristaltic. See =Physostigminae Salicylas=, which has the same actions and deserves preference because of its uniform composition. DOSAGE: 0.1 Gm. or 1-1/2 grains (U.S.P.). Not used as such. _Extractum Physostigmatis (Ext. Physostig.), Extract of Physostigma, U.S.P._ (Powdered Extract of Physostigma).--One Gm. extract represents about 13 Gm. of physostigma. Yields about 2 per cent. of alkaloids. DOSAGE: 0.008 Gm. or 1/8 grain (U.S.P.). _Tinctura Physostigmatis (Tr. Physostig.), Tincture of Physostigma, U.S.P._ (Tincture of Calabar Bean).--Physostigma (10%), yielding about 0.015 per cent. of alkaloids. Absolute alcohol content about 92 per cent. DOSAGE: 1 Cc. or 15 minims (U.S.P.). =*Physostigminae Salicylas (Physostig. Salicyl.), Physostigmine Salicylate, U.S.P.= (Eserine Salicylate).