2. From the infusion or decoction. Antispasmodic, pectoral, tonic, and emmenagogue.—Dose, 10 gr. to 1 dr.
3. (Ph. Baden.) By displacement with cold water.
4. (Alcoholic; Extractum marrubii alcoholicum, L.)—a. From a tincture made with proof spirit. Said by M. Thoriel to possess considerable power as a febrifuge.—Dose, 5 gr. to 20 gr.
b. (Ph. Lusit.) From a tincture made with a mixture of rectified spirit, 1 part, and water, 7 parts. Inferior to the last.
Extract of Ind′ian Hemp. Syn. Cannabine, Hemp resin, Alcoholic extract of Indian hemp; Extractum cannabis Indicæ, E. c. I. alcoholicum, Resina cannabis, L. Prep. 1. (B. P.) Indian hemp in coarse powder, 1;
rectified spirit, 5; macerate seven days, press out the tincture, distil off the spirit, and evaporate.—Dose, 1⁄4 to 1 grain in pill.
2. (O’Shaughnessy.) The dried resinous tops of Indian hemp (‘GUNJAH’) are boiled in rectified spirit until all the resin is taken up, when most of the spirit is distilled off, and the evaporation completed by the heat of a water bath. 1 cwt. yields about 7 lbs.
3. (Robertson). By slowly acting on the ‘gunjah’ with the vapour of alcohol, by a species of percolation; the spirit of the resulting tincture is partly removed by distillation, and the rest by slow evaporation at a temperature not above 150° Fahr. 1 cwt. yields about 8 lbs.—Dose of the last two, 1 to 3 gr., gradually increased.
4. (Messrs Smith.) The bruised ‘gunjah’ is exhausted with tepid water, then with a solution of carbonate of soda (1 of carbonate to 2 of gunjah), and next with pure water; it is then pressed, dried, and exhausted by displacement with rectified spirit; the tincture is agitated with a milk of lime (containing 1 oz. of lime for every lb. of gunjah), and, after filtration or decantation, any retained lime is precipitated by a little sulphuric acid in slight excess; the tincture is next agitated with animal charcoal, and again filtered; most of the spirit is now removed by distillation, and 3 or 4 times its bulk of water being added, the remaining spirit is removed by a gentle heat; lastly, the remaining water is poured off, and the resin remaining washed with fresh water, and dried. Product, 6%.—Commencing dose, 1⁄4 gr.
3. (Purified; Extractum cannabis Indicæ purificatum, L.—Ph. D.) From the crude extract of Indian hemp, as imported (‘CHURRUS’), 1 oz.; rectified spirit, 4 fl. oz.; dissolve, and after defecation, decant, and evaporate.