The principal consumption of this extract is among the brewers, brewers’ druggists, and wine merchants. For this purpose it is evaporated until it becomes hard on cooling, when it is formed into half-pound rolls, and covered with paper, like lead plaster. One of these rolls added to a hogshead of ale, stout, or sherry, materially increases the ‘headiness’ or apparent strength of these beverages.
Extract of Pota′to. Syn. Extractum Solani tuberosi, L. Prep. (Dr J. Latham.) From the stem and leaves of the potato plant, as EXTRACT OF ACONITE—Ph. L. Narcotic.—Dose, 2 to 10 gr.
Extract of Pur′ging Flax. Syn. Extractum lini cathartici, L. Prep. (Dr B. Lane.) From the dried herb, as EXTRACT OF HOPS—Ph. L. Aperient and diuretic—Dose, 5 to 10 gr.; 14 lbs. yielded 21⁄4 lbs. of extract.
Extract of Quas′sia. Syn. Extractum quassiæ (B. P.), Ex. q. ligni, L. Prep. 1. (B. P.) Quassia scraped, 1 lb.; distilled water, a sufficiency; macerate the quassia in 8 oz. of water for 12 hours; pack in a percolator; add water till the quassia is exhausted; evaporate, filter before it becomes thick, and again evaporate in a water bath to a proper consistence for pills.—Dose, 2 to 5 gr.
2. From the decoction of quassia chips. Product, 5% to 6%.
3. (Ph. E.) From the rasped wood, as EXTRACT OF BISTORT—P. Cod. Bitter and stomachic.—Dose, 5 to 10 gr., or more.
Obs. This extract is almost universally prepared by coction, and is principally consumed by the brewers, who employ it as a substitute for hops, in large quantities. The bark is frequently substituted for the wood, but is considerably less bitter. The Ph. Baden has an extract prepared with spirit of ·944.
Extract of Quince Seeds. Syn. Extractum cydoniæ, E. c. seminum. Prep. From the decoction. Sucked as a lozenge, in hoarseness, &c.
Extract of Ragwort. Syn. Extractum JacobϾ. The inspissated juice of rag-wort.
Extract of Rha′tany. Syn. Extractum rhataniæ; E. krameriæ (B. P.), L. Prep. 1. (B. P.) Rhatany in coarse powder, 1; cold distilled water, 15; macerate 24 hours in 2 of the water, then percolate the whole; evaporate by water bath to dryness.—Dose, 5 to 20 grains.