_*Sodii Phosphas Effervescens (Sod. Phos. Eff.), Effervescent Sodium Phosphate, U.S.P._--Exsiccated sodium phosphate (20%) in a mixture of sodium bicarbonate (47.7%), tartaric acid (25.2%) and citric acid, the last three yielding sodium citrate and sodium tartrate. DOSAGE: 10 Gm. or 2-1/2 drachms (U.S.P.). =*Sodii Salicylas (Sod. Salicyl.), Sodium Salicylate, U.S.P.=--C{6}H{4}(OH) (COONa). White or nearly white, odorless or nearly odorless powder having a sweet, saline taste. Very soluble in water (1:0.9) and freely soluble in alcohol (1:9.2). Incompatible with acids, with acid salts and with solutions of many of the alkaloids, particularly quinine, which precipitates as the salicylate. ACTION AND USES: The salt usually employed to secure the constitutional action of salicylic acid. DOSAGE: 1 Gm. or 15 grains (U.S.P.). _Elixir Sodii Salicylatis (Elix. Sod. Salicyl.), Elixir of Sodium Salicylate, N.F._--Sodium salicylate (8.5%), syrup, water and aromatic elixir. Absolute alcohol content about 7 per cent. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Elixir Sodii Salicylatis Compositum (Elix. Sod. Salicyl. Co.), Compound Elixir of Sodium Salicylate, N.F._--Sodium salicylate (8%), fluidextract of cimifuga (3.2%), fluidextract of gelsemium (1.6%) and potassium iodide (1.5%) in aromatic elixir. Absolute alcohol content about 23 per cent. USES: An irrational rheumatism mixture, constituting an invitation to haphazard use. DOSAGE: 4 Cc. or 1 fluidrachm (N.F.). _Liquor Ferri Salicylatis (Liq. Ferr. Salicyl.), Solution of Ferric Salicylate, N.F._ (Salicylated Mixture of Iron).--Solution containing ferric salicylate with a large excess of sodium salicylate [obtained by the interaction of sodium salicylate (12.5%) and tincture of ferric citrochloride (12.5%)], and ammonium citrate, methyl salicylate, glycerin and water. USES: "Rheumatism remedy." Ferric salicylate has no special advantage over the sodium salt. DOSAGE: 8 Cc. or 2 fluidrachms (N.F.). =*Sodii Sulphas (Sod. Sulph.), Sodium Sulphate, U.S.P.= (Glauber's Salt).--Na{2}SO{4} + 10H{2}O. Colorless, odorless, efflorescent crystals, having a bitter, saline taste. Freely soluble in water (1:1), but insoluble in alcohol. ACTION AND USES: Saline cathartic, more disagreeable but less active than magnesium sulphate, over which it has no material advantage. DOSAGE: 15 Gm. or 4 drachms (U.S.P.). _Sal Carolinum Factitium (Sal Carol. Fact.), Artificial Carlsbad Salt, N.F._--This is available in two forms, the dry amorphous form and the crystalline form, the latter representing about 80 per cent. of water of crystallization. The dry amorphous form represents potassium sulphate (2%), sodium chloride (18%), sodium bicarbonate (36%) and hydrated sodium sulphate (100%). USES: Alkaline cathartic.