Tincture of Colchicum Bulbs. Syn. Tinctura colchici e radice. (P. Cod.) Prep. Macerate 1 part of the bulbs in 5 parts (by weight) of proof spirit, for 10 days.

Tincture of Colchicum (Compound). Syn. Tinctura colchici composita (Ph. L.), Spiritus colchici ammoniatus, L. Prep. (Ph. L.) Colchicum seeds, bruised, 5 oz.; aromatic spirit of ammonia, 1 quart; digest for 7 days, then press, and filter.—Dose, 20 drops to 1 fl. dr.; in gout, &c.

Tincture of Colchicum Flowers. Syn. Tinctura florum colchici; Eau medicinale d’Husson. (Dr Wilson.) Prep. Take of the fresh juice of colchicum flowers, 2 parts; French brandy (or proof spirit), 1 part; mix, and in a few days decant, or filter, and preserve it in small bottles in a cool place.

Tincture of Colocynth. Syn. Tinctura colocynthidis. (Ph. G.) Colocynth, 1 part; rectified spirit, 10 parts. Dose, 6 to 20 drops.

Tincture of Contrayerva. Syn. Tinctura contrayervæ. (P. Cod.) Prep. Contrayerva root, 4 oz.; rectified spirit, 1 pint.

Tincture of Copai′ba (Alkaline). Syn. Tinctura copaibæ alkaline, L. Prep. (Lewis Thompson.) Dissolve carbonate of potassa, 2 oz., in water, 1 pint, and add to this balsam of copaiba, in a thin stream, constantly stirring, until the mixture, at first white and milky, becomes clear, like jelly or amber, which will generally take place when about a pint of balsam has been added; set the mixture aside for two or three hours, then pour in of rectified spirit, 1 quart, and mix the whole together. Sweet spirit of nitre may be substituted for spirit of wine, provided it does not contain free acid.—Dose, 1 to 2 teaspoonfuls.

Tincture of Croton. Syn. Tinctura crotonis. Prep. Croton seed, 1 part; rectified spirit, 5 parts. (Beasley.)

Tincture of Cu′bebs. Syn. Essence of cubebs; Tinctura cubebæ (B. P., Ph. L. & D.), Tinctura piperis cubebæ, L. Prep. 1. (B. P.) Cubebs, in powder, 1; rectified spirit, 8; macerate 48 hours with 6 of the spirit, agitating occasionally, pack in a percolator and let it drain; pour on the remaining spirit, and when it ceases to drop, wash the marc with spirit to make up 8.—Dose, 1 to 2 dr.

2. (Ph. L.) Cubebs (bruised or ground in a pepper-mill), 1 lb.; proof spirit, 1 quart; macerate for 7 days, press out the liquor, and filter.—Dose, 12 to 1 fl. dr., three or four times a day; in gonorrhœa, &c.

3. (Ph. D., & Ph. L. 1836.) Cubebs, 5 oz.; rectified spirit, 1 quart (proof spirit—Ph. D. 1826); macerate for 14 days.—Dose, 1 to 2 fl. dr.