Dose, 1/2 - 2 grs.; 3 - 12 cgms.

The dried leaves of Digitalis purpurea. From 4-12 inches or more in length, and at times 5-6 inches broad; upper surface, rugose, dull green and slightly hairy, under surface paler and densely pubescent; no marked odour; taste very bitter. The chief active principles are the glucosides, digitalin, digitoxin, and digitalein.

Incompatibles, strong alkalies, acids, (e.g. in Tinct. Ferri Perchloridi) lead acetate, ammonia.

1Infusum Digitalis. Dose, 2 - 4 fl. dr.; 8 - 16 c.c. - 0.68; boiling Water, 100.

1Tinctura Digitalis. Dose, 5 - 15 min.; 0.3 - 1 c.c. - 12.5; Alcohol 60%, 100: by percolation.

Elaterium. Elaterium. Dose, 1/10 - 1/2 gr.; 6 - 30 mgms. A sediment from the juice of the fruit of Ecballium Elaterium. Light friable, greenish cakes, about 1/10 inch thick; odour faint, tea-like; taste bitter and acrid.

1Elaterinum. Elaterin. Dose, 1/40 - 1/10 gr.; 2 - 6 mgms. The active principle of elaterium. Small scales, with a bitter taste. Insoluble in water, or glycerin, soluble 1 in 160 of cold alcohol, readily in hot; or in chloroform or solutions of the alkalies.

2Pulvis Elaterini Compositus. Dose, 1 - 4 grs.; 1/2 - 2 1/2 dgms. - 2.5; Milk Sugar, 97.5.

Emplastra. (see Ammoniacum, Belladonna, Cantharis, Hydrargyrum, Menthol, Opium, Pix, Plumbum, Resina, Sapo).