Extract of Quas′sia

Syn. Extractum qua iæ (B. P.), Ex. q. ligni , L. Prep. 1. (B. P.) Qua ia scraped, 1 lb.; distilled water, a sufficiency; macerate the qua ia in 8 oz. of water for 12 hours; pack in a percolator; add water till the qua ia 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 qua ia 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 le bitter. The Ph. Baden has an extract prepared with spirit of ·944.