EXTR

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Take Jxvj of opium, and one gallon of water, add a little of thewater to the opium, macerate for twelve hours, or till it becomes soft,then add by degrees the rest of the water, triturate the whole tillwell mixed, let the dregs subside, strain the liquor, and evaporate tomake an extract. It is doubtful whether this be an improved pre-paration of crude opium, though it is said to produce less irritationand derangement of the system. One thing is certain, that the dregscontain a considerable portion of morphia.Incompatible with vegetable preparations containing tannin, with ace-tate of lead, carbonate of potass, oxymuriate of mercury, nitrate ofsilver, and the sulphates of copper and zinc.Medicinally the dose is gr. ss to gr. v in form of pill. See Opium.Eiders into Syr. Opii. D.Extractum PArAVERis. L. E. Extract of Poppy. Take Ibj of thecapsules of white poppies, and one gallon of water, and proceed as forextract of gentian. As its efficacy depends upon its morphia, whichis much modified by heat, it is a rather uncertain preparation. Itshould always be prepared by Barry's method.Incompatible. 1 ; the same as the preceding.

Medicinally the dose is gr. v to Dj, it being usually one half or moreweaker than opium.Extractu.1i Quercus Corticis. D. Extract of Oak Bark. Prepared

as extract of gentian. It is given as an astringent in hemorrhage.Extractum Riiei. L. D. Extract of Rhubarb. Prepared in the sameway as the resinous extract of cinchona. The efficacy of rhubarbdepends on its rhubarbarine, which is partly dissipated by this process.The dose is gr. x to 5ss, and is less nauseous than rhubarb.Incompatible with nitric acid, which converts rhubarbarine into oxalicacid.Extractum Rutje Graveolentk. E. D. Extract of Rue. Pre-pared like extract of gentian. The essential oil of rue is driven offduring the process, and only the bitter principle remains, which isinferior to extract of gentian, chamomile, &C.Medicinally it may be given as a stomachic tonic in doses of gr. x to 3jtwice a day, in form of pill.Extractum Sabine Foliorum. D. Extract of Savin. Prepared likeextract of gentian. The essential oil of Savin is dissipated duringthe process, and the extract is a simple bitter, somewhat acrid, andtherefore stimulant. The dose is gr. x to 3j in pills.Extractum SarsaparilLjE. L. Extract of Sarsaparilla is preparedlike extract of gentian. There can be no doubt that the efficacy ofthe crude drug is injured by the process, and that this is au inertand useless preparation. Barry's extract, however, is very different.