596

InI'UoIONS.

part in.

erful, agreeable astringent, is the best form under which catechucan be prescribed ; and is very useful in long-continued diar-rhoea, and other fluxes, proceeding from a weakened state of theintestines. The dose is from fjj. to f jiij. given after every liquiddejection, or every four hours.

INFU'SUM CINCHONA. Lond. Infusion of CinchonaBark.'

" Take of lance-leaved cinchona bark 1 , bruised, AaZ/«« ounce;boiling water, half a pint. Macerate for two hours in a lightlycovered vessel, and strain."

This infusion contains a very considerable portion of thefebrifuge matter of the baric; it is slightly turbid, has a palepinkish yellow colour, more of the aromatic odour of thebark than the decoction possesses, and an equal degree of bit-terness and astringency. It ferments spontaneously in thecourse of a few days during summer. It affords precipitateswith the following substances; the strong acids, the alkalinecarbonates, lime-water, solutions of sulphate of iron, sulphateof zinc, nitrate of silver, oxymuriate of mercury, oxide ofarsenic, with subcarbonate of potash, and tartarized anti-mony ; the aqueous infusions and decoctions of chamomileflowers, calumba, cascarilla, horse-radish, cloves, catechu,orange-peel, foxglove, senna, rhubarb, valerian, simaruba, andelm bark.

Any considerable portion of the tinctures also produces pre-cipitates in this infusion. Some of these precipitates take placeimmediately, others not till after several hours have elapsed ; thefebrifuge virtue is perhaps not always destroyed by them, butthe mixtures are certainly rendered inelegant. The sulphuricacid destroys the bitterness of the infusion, but not its astrin-gency.

Medical properties and uses. — The cinchona in this formagrees better with most stomachs than when in powder; but itspowers are necessarily diminished. It is chiefly serviceable indyspepsia, and convalescencies, particularly after the matura-tion of the pustules in Ecthyma vulgare. The dose is fromfjj. to {% iij. three or four times a day.

INFUSUM CINCHONA LAJVCIFOLIiE. Edin. In-fusion of Cinchona. Infvsum Cinchonm sine Caeoke. Dub.Cold Infusion of Cinchona.

" Take of cinchona bark, bruised, one ounce; water, onefound [twelve ounces by measure. Dub.) Macerate for twenty-

1 Infusion de Quinquina (F.) Chinainfusum (G.) Infuso di China (/.)

2 The other species of cinchona may be used in the same manner, and pro-portions.