02 EXTRACTS.

rest tili it becomes pretty clear; pour off thesupernatant liquor, which may be thrownaway; anddry the feculence with a gentle heat.

EXTBACTUM GENTIANAE.

Take of Gentian, any convenient quantity;bruise it to a moderatcly fine powder; mixit thoroughly with half its weight of distil-Icd water; in twelve hours put it into a pro-per percolator, and exhaust it by pcrcolationwith temperate distilled water; concentratethe liquid, filter before it becomes too thick,and evaporate in the vapour-bath to a dueconsistence.

EXTRACTUM GLYCIRRIIIZAE.

Cut Liquorice-root into small chips, dry itthoroughly with a gentle heat, reduce it toa modcrately fine powder, and proeeed as forexti'act of Gentian.

EXTRACTUM HAEMATOXYLI.

Take of Logwood, in fine chips, a pound ;

Boiling water, a gallon.Macerate for twenty-four hours, thcn boildown to four pints, strain, and concentratein the vapour-bath to the due consistence.

EXTRACTUM HYOSCYAMI.

This extract is to be prepared from the freshleaves of Hyoscyamus by any of the proces-ses directed for extract of Conium.