=Mangani Citras Solubilis (Mangan. Cit. Sol.), Soluble Manganese Citrate, N.F.= (Manganese and Sodium Citrate). Yellowish or pinkish white powder or translucent scales, odorless and having a slightly bitter, astringent taste. Freely soluble in water (1:4) and nearly insoluble in alcohol. ACTION AND USES: Manganese salts have been tried as hematinic tonics, but are of very doubtful value. The choice among the various salts is a matter of convenience. The soluble citrate is typical of the soluble manganese salts, the dioxide of the insoluble. DOSAGE: 0.2 Gm. or 3 grains (N.F.). =Mangani Dioxidum Praecipitatum (Mangan. Diox. Praec.), Precipitated Manganese Dioxide, U.S.P.=--Chiefly MnO{2}. Heavy, odorless, tasteless black powder. Insoluble in water or alcohol. ACTION AND USES: See =Mangani Citras Solubilis=. DOSAGE: 0.25 Gm. or 4 grains (U.S.P.). =Mangani Glycerophosphas Solubilis (Mangan. Glycerophos. Sol.), Soluble Manganese Glycerophosphate, N.F.= (Soluble Manganous Glycerinophosphate).--A mixture of manganese glycerophosphate and citric acid. Yellowish or pinkish white, odorless powder, with an acid taste. Freely soluble in water (1:4); alcohol dissolves the citric acid and leaves a residue which is nearly insoluble in water. ACTION AND USES: As a manganese compound it has no material advantage over other manganese salts. For a discussion of glycerophosphates, see =Sodii Glycerophosphas=. DOSAGE: 0.2 Gm. or 3 grains (N.F.). =Mangani Hypophosphis (Mangan. Hypophos.), Manganese Hypophosphite, N.F.=--Mn(H{2}PO{2}){2} + H{2}O. Pink, odorless, nearly tasteless powder. Freely soluble in water and insoluble in alcohol. ACTION AND USES: As a manganese compound, has no material advantage over other manganese salts. For a discussion of hypophosphites, see =Calcii Hypophosphis=. DOSAGE: 0.2 Gm. or 3 grains (N.F.). =Mangani Sulphas (Mangan. Sulph.), Manganese Sulphate, N.F.=--MnSO{4} (about 65%). Pale rose-colored, translucent, odorless crystals, with a slightly bitter taste, slightly efflorescent in moist air. Freely soluble in water (1:1) and insoluble in alcohol. ACTION AND USES: Without material advantage over other manganese salts. DOSAGE: 0.2 Gm. or 3 grains (N.F.). =Manna (Manna), Manna, U.S.P.=--A dried sap. ACTION AND USES: Mild laxative; antiquated. DOSAGE: 15 Gm. or 4 drachms (U.S.P.) as infusion. _Syrupus Mannae (Syr. Mann.), Syrup of Manna, N.F._--Manna (12.5%) and alcohol in syrup. Absolute alcohol content about 6 per cent. DOSAGE: 8 Cc. or 2 fluidrachms (N.F.). =MASSAE, MASSES.=--Soft solid preparations of such consistency that they can readily be made into pills. For the various masses, see under the names of the respective drugs. =Mastiche (Mastic.), Mastic, N.F.=--A resin. Completely soluble in ether and almost completely soluble in alcohol.