620

Extracts.

part m.

as the extract of gentian of that college; the Dublin, after themanner directed for the preparation of the simple extracts.

In these processes the volatile oil is dissipated, and a simplebitter extract remains, possessing scarcely any of the propertiesof the plant. It is of a deep brown colour, and has a gratefulbitter taste, but scarcely any odour. It has scarcely any effi-cacy when used alone; but is a useful adjunct to rhubarb, andsulphate of zinc as a stomachic pill. The dose may be fromgrs. x. to 3j. given twice or thrice a day.

EXTRACTUM BELLADONNA. LoixL Succus spis-SATUS Atrop^ Belladonna. Edin. Extract of Belladonna,*

" Take of fresh leaves of belladonna, a pound. Bruise themin a stone mortar, sprinkling a little water over them; thenexpress the juice, and, without any separation of the sediment,evaporate it to a proper consistence."

The inspissated juice of the Edinburgh Pharmacopoeia isto be prepared in the same manner as the inspissated juice ofaconite.

This extract is inodorous, and has a bitterish taste. Its me-dicinal properties are the same as those of the plant, but weaker.The dose is from gr.j. gradually increased to grs. v. given inthe form of pills.

EXTRACTUM CASCARILLA RESINOSUM. Dub.Resinous Extract of Cascarilla.''

" Take of cascarilla bark in coarse powder, a pound; recti-fied spirit of wine, four pints. Digest for four days, then pouroff the coloured spirit, and filter. Boil what remains of the cas-carilla in ten pints of water down to two pints; then evaporatethe strained decoction, and at the same time distil the tincturefrom a retort, until both begin to thicken; then mix them to-gether, and evaporate the mixture to a consistence proper formaking pills. Lastly, mix the extracts intimately together."

This preparation is expensive, and does not appear to possessany peculiar advantages to recommend it. The dose is fromgrs. x. to 9j. given twice or thrice a day, in the form of pills.

EXTRACTUM CINCHONA. Lond. 3 Extract of Bark.

" Take of lance-leaved cinchona bark bruised, a pound;water, a gallon. Boil down to six pints, and strain the liquorwhile it is warm. In the same manner boil it down again foursuccessive times, in an equal quantity of water, and strain.

» Extrait de Belladonne (F.) Belladonnaextrakt (G.) Estratto de l'erba di Bella-donna (/.)

* Extrait de Cascarille (F.) Cascarillenextrakt (G.)

I Extractum Cortieis Peruviani, P. L. 17S4. Extrait de Quinquina (F.) Wassrigles Chinaextrakt (G.) Estratto di China arruosa (!)