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Extracts.

part III.

subsided, to be filtered, and evaporated by the heat of boilingwater, until it begins to thicken; and is to be, finally, inspis-sated by a medium heat, frequently stirring, until it acquires aconsistence proper for forming pills.

" All extracts, when they begin to get thick, ought to befrequently stirred with a clean iron spatula. They may bereduced to a proper degree of thickness by means of a stoveheated for the purpose.

" They ought to be preserved as much as possible from thecontact of the air; and the softer ones are to be sprinkled withrectified spirit."

EXTRACTUM CACUMINUM ABSYNTHII, Dub.Extract of Wormwood.

Syn- Extrait d'Absynthe( F.}, Wermuth-extrakt ((?•)> Estrattoil'Assenzo (/.).

This is ordered to be prepared according to the above direc-tions. It is nearly a simple bitter, the volatile oil being dis-sipated during the evaporation. It maybe used in those casesfor which bitters are commonly prescribed; but it is scarcelyever used. The dose is from gr. x. to 3j. taken, three timesa-day.

EXTRACTUM ACONI'TI, Lontl. Extract of Aconiteor Wolfsbane.

" Take of fresh leaves of Aconite, a pound. Bruise them ina stone mortar, sprinkling over them a Jittle water; then ex-press tlie juice, and, without any depuration, evaporate it to aproper consistence."

Succus spissatvjs Aconiti Napelli, Edin. InspissatedJuice of Aconite.

" Let fresh leaves of Aconite be bruised ; inclose them in ahempen bag, and press them strongly, until they yield theirjuice; which is to be evaporated in flat vessels, heated withboiling water saturated with Muriate of Soda (common salt,)and immediately reduced to the consistence of thick honey.

" After the mass is cold, let it be put into glazed earthenvessels, and moistened with alcohol."

Syn. Extrait d'Aconit (F-), Eisenhiitlein-extrakt (G.), Estratto d'AconitoNapeUo(7.).

This extract, or inspissated juice, is the form under whichStoerk introduced Wolfsbane into practice. It has an obscure,brownish red colour, a disagreeable odour, and an acrid, slightlystyptic taste. Its medicinal properties are the same as thoseof the plant, but it is very seldom used. (See Part ii.) Thedose at first should be gr. | only, and gradually increased togrs. vj. taken night and morning.

EXTRACTUM ALOES PURIFICATUM, Lond. Ex-tract of Aloes,

" Take of extract of spiked Aloes in powder, half a pound ;boiling water, four pints. Macerate for three days in a gentle

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