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The London Dispensatory, containing : 1. the Elements of Pharmacy ; 2. the botanical Description, natural History, chemical Analysis, and medicinal Properties of the Substances of the Materia Medica ; 3. the pharmaceutical Preparations and Compositions of the Pharmacopoeias of the London, Edinburgh, and Dublin Colleges of Physicians ; the Whole forming a Practical Synopsis of Materia Medica, Pharmacy, and Therepeutics
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626

Extracts.

tart in.

I

This extract is inodorous; and has the bitter taste peculiarto the hop. We have found it an useful anodyne in gout,acute rheumatism, and cases which do not admit of the use ofopium. The dose is from grs. v. to 3j. given in the form ofpills, or dissolved in any aqueous vehicle.

EXTRAC'TUM HYOSCY'AMI. Lond. Succus spis-satus Hyoscyami nigri. Edin. Succus spissatus Hyos-cyami. Dub. Extract of Henbane. l

" Take of fresh leaves of henbane, a pound. Bruise themin a stone mortar, sprinkling on them a little water; then pressout the juice, and without separating the sediment, evaporateit to a proper consistence."

This extract has a disagreeable slightly foetid odour, and anauseous, bitterish, subsaline taste. It is possessed of con-siderable narcotic powers, and is used as a substitute for opiumin nervous affections, mania, gout, rheumatism, and all painfulcomplaints, in which it is wished to avoid the costiveness whichopium is apt to induce. A solution of it in water, in the pro-portion of one drachm to the ounce, dropped into the eye, di-lates very much the pupil; and has been used, on the recom-mendation of Professor Himly, for facilitating the operation forcataract; and also in contracted pupils not accompanied byadhesion of the iris to the capsule. * The dose is from grs. iij.to 9j. given in the form of pills.

EXTRAC'TUM JALAPS. » Lond. Extract of Jalap.

" Take of jalap root powdered, apound; rectified spirit, fourpints ; water, ten pints. Macerate the jalap root in the spiritfor four days, and decant the tincture. Boil the residue in thewater down to two pints. Then strain separately the tinctureand the decoction; distil the former, and evaporate the latter,until both begin to thicken. Lastly, mix the extract with theresin, and evaporate the mixture to a proper consistence."

" This extract should be kept in a soft state fit for formingpills, and in a hard state, so that it may be reduced topowder."

Extractum CoNVOLVuLiE Jalap^e. Edin. Extract ofJalap.

This is ordered to be prepared from the root, in the samemanner as the extract of cinchona bark. {Edin.)

Extractum Jalapje. Dub. Extract of Jalap.

" Let it be prepared in the same manner as the resinousextract of cascarilla."

• Extra'u de Jusquiame (F.) Hjoszyamus-ejtrakt (<?.) Estiatla (li Giusquiamaaerz (I.) * Edin. Medical and Surg. Journal, vol. ix. p. 6. 11.

l Extractuic Jalapii, P. L. I745. Extrait de Jalaj> (F.)

 
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