Alumen. Alum. - Dose, 5 - 10 grs.; 3 - 6 dgms.

Aluminium and potassium sulphate, (A12(S04)3, K2SO4, 24 H20, or aluminium and ammonium sulphate, Al2(SO4)3, (NH4)2 SO4, 24 H2O. Colourless, transparent crystals having a sweetish, astringent taste.

Soluble 1 in 10 of cold, 1 in 1/3 of hot water; soluble in glycerin; insoluble in alcohol.

Incompatibles, alkali hydrates, or carbonates, borax and lime water (citrates, tartrates, glycerin, sugar, acacia, in part prevent precipitation); phosphates, tannic acid, tartaric acid; lead, barium, mercury and iron salts.

2alu Men Exsiccatum

Potassium alum from which the water of crystallization has been driven off by heat.

2glycerinum Aluminis

16.66 Water, 6.25; Glycerin, to 100. 2Kaolinum (See p. 69.)

Ammoniacum. Ammoniacum. - Dose, 5 - 15 grs.; 3 - 10 dgms. A gum-resin exuded from the flowering and fruiting stem of Dorema Am moniacum. It forms small pale yellowish or brownish tears or masses, hard and brittle when cold, softening when warmed. Odour, faint; taste acrid and bitter. Triturated with water forms a white emulsion; about 60% is soluble in alcohol.

Emplastrum Ammoniaci Cum Hydrargyro

164; Mercury, 41; Olive Oil, 1.75; Sublimed Sulphur, 0.25.

Mistura Ammoniaci

Dose, 1/2 - 1 fl. oz.; 15 - 30 c.c. - 3; Syrup of Balsam of Tolu, 6; Water, to 100.