Chap XXXV. Of Extracts and Resins.

601

Socotorine aloes, in powder, one ounce and a half;Scammony, in powder, half an ounce ;Cardamom seeds, powdered, one drachm ;Proof-spirit, one pound.Macerate the pulp of colocynth in the spirit, with a gentleheat, for four days. Strain the liquor, and add to it thealoes and scammony. Then evaporate to a proper thick-ness, adding, towards the end of the operation, the carda-mom seeds.

EXTRACTUM RHEI. Lotld.

Extract of Rhubarb.Take of

Rhubarb root, in powder, one pound ;

Proof-spirit, one pint;

Water, seven pints.Macerate, with a gentle heat, for four days ; then filter, and

set it aside, until the faeces subside. Pour off the liquor

clear, and evaporate to a proper thickness.

ExTRACTUM JALAPS. Lond.

Extract of Jalap.

Take of

Jalap, in powder, one pound;Rectified spirit, four pints;Water, two pints.

Macerate the jalap in the spirit, for four days, and pour offthe tincture. Boil the residuum in the water to two pints.Then filter the tincture and decoctions separately, and eva-porate the latter, and distil the former until both thicken ;lastly, mix the extract with the resin, and evaporate to aproper thickness.

This extract is to be kept in two states, one soft, proper formaking pills, and one hard and pulverizable.

EXTRACTUM CASCARIIX^ RESINOSUM. Did).

Resinous Extract of (ascarilla.

Take of

Cascarilla, in coar«e powder, one pound;Rectified spirit of wine, four pints.

Digest for four days ; then pour off the tincture, and strain ;boil the residuum, in ten pints of water, to two : evaporatethe filtered decoction, and distil the tincture, in a retort,till both begin to grow thick ; then mix them, and evapo-rate them to a state fit for making pills. Lastly, they areto be intimately mixed.