Chap. XXXV. Of Extracts and Resins.

595

of distilled water. Boil to the consumption of one-halfof the liquor, and strain it by strong expression. Evaporatethe decoction immediately, to the consistence of thick ho-ney, in a bath of water saturated with muriate of soda.

Extracta. Land.Extracts.In preparing all extracts, evaporate the fluid in a pan, in awater-bath, as quickly as possible, until it become of a pro-per thickness for forming into pills, stirring it constantlytowards the end with a spatula.Sprinkle a little Rectified spirit on all softer extracts.

ExTRACTA SJMPLIC/ORA. Dub.

Simple Extracts-All simple extracts, unless otherwise ordered, are to be

prepared according to the following rule :

The vegetable matter is to be boiled in eight times its weightof water, to one-half; the liquor is then to be expressed,and, after the fasces have subsided, to be filtered ; it is thento be evaporated, with a heat between 200° and 212°, un-til it becomes thickish ; and, lastly, it is to be evaporatedwith a heat less than 200°, and frequently stirred, until itacquire a consistence proper for forming pills.

All extracts, when they begin to get thick, ought to be fre-quently stirred with a clean iron spatula They may bereduced to a proper thickness by means of a stove, heatedon purpose.

They ought to be preserved as much as possible from the con-tact of the air, and the softer ones are to be sprinkled withrectified spirit.

In this manner are prepared the following officinal Extracts.

ExTRACTUM

Cacuminum Absinthii. Dub.Radicis Glycyrrhiz^e glabra.

---------- GLYCYRRHIZ.E. Dub.

---------- Hellebori nigri. Ed.

---------- Gbntian.<£ lute^e. Ed.

---------- Gentians. Dub.

• Jalaps. Dub.

Foliorum Rutjs. graveolentis.

----------- Rut;e. Dub.

----------- Cassia sennjE. Ed.

• —i ----- Sabine. Dub.

Thrum Anthemidis nobixis. Ed....... Chamjemeh. Dub.

Ed.Dub.

Ed.

Extract ofWormwood.

{■ Liquorice.

Black Hellebore.j- Gentian.

Jalap.

| Rue.

Senna.Savin.

J

Chamomile.