of acetate of potash, 8 oz., in another quart of rectified spirit; and having thoroughly mixed the solutions, by frequent agitation in a large bottle, filter the whole, with expression, first through calico, and then through paper. Sp. gr. ·891.—Dose, 15 to 60 drops, in water, in the same cases as in the other chalybeates.

Tincture of Acetate of Zinc. Syn. Tinctura zinci acetatis, L. Prep. (Ph. D. 1826.) Acetate of potash and sulphate of zinc, of each 1 oz.; rub them together, then add of rectified spirit, 16 fl oz.; macerate for a week, and filter. Astringent. Diluted with water, it is used as a collyrium and injection.

Tincture of Ac′onite. Syn. Tinctura aconiti (Ph. L.), Tinct. aconiti radicis (B. P., Ph. D.), L. Prep. 1. (B. P.) Powdered root, 1; rectified spirit to percolate, 8; macerate for 48 hours with three fourths of the spirit, agitating occasionally, pack in a percolator and let it drain, then pour on the remaining spirit; when it ceases to drop, press the marc and add spirit to make up 8.—Dose, 5 to 15 minims, twice or thrice a day.

2. (Ph. L.) Take of aconite root, coarsely powdered, 15 oz. (20 oz.—Ph. D.); rectified spirit, 1 quart; macerate for 7 days, press, and filter.

Obs. These tinctures differ materially in strength.—Dose. Of the Ph. L., 5 to 10 drops; of the Ph. D., 3 to 6 drops, two or three times daily (carefully watching its effects); in rheumatism, gout, syphilis, &c., where a narcotic sedative is indicated. Diluted with water, it forms an excellent embrocation in rheumatism, neuralgia, &c. It should be applied by means of a small sponge, tied to the end of a stick or glass rod. The Ph. D. formula is nearly the same as that for Dr Turnbull’s concentrated tincture of aconite root, and that given by Dr Pereira. The TINCTURA ACONITI FOLIORUM of the Ph. U. S. is made with 1 oz. of the dried leaves to 8 fl. oz. of rectified spirit.

Tincture of Aconite, Ethereal. Syn. Tinctura aconiti ætherea. (P. Cod.) Prep. Powdered aconite, 4 oz.; sulphuric ether, 16 oz. (by weight). It is best prepared by percolation.

Tincture of Ailanthus Bark. Syn. Tinctura ailanthi corticis. Prep. Take Of ailanthus bark, bruised, 112 oz.; proof spirit, 1 pint; macerate for seven days in a closed vessel with occasional agitation, then strain, press, filter, and add sufficient spirit to make 1 pint.—Dose. From 12 to 2 fl. dr.

Tincture of Al′oes. Syn. Tinctura aloës (B. P., Ph. L. & E.), L. Prep. 1. (B. P.) Socotrine aloes, 1; extract of liquorice, 3; proof spirit, 40; macerate seven days, press, and wash the marc with spirit to make 40.—Dose, 1 to 2 dr.

2. (Ph. L.) Socotrine or hepatic aloes, coarsely powdered, 1 oz.; extract of liquorice, 3 oz.; water, 112 pint; rectified spirit, 12 pint;

macerate for 7 days, and filter. The formula of the Ph. E. is nearly similar. Purgative and stomachic.—Dose, 14 to fl. oz.