Part II.

Materia Medica.

U7

The resin may be exhibited,

1. In substance, made either into pills, or suspended in

water in the form of an emulsion. In this way, from10 to 30 grains of* the resia may be taken in theday.

2. In solution ; in alcohol. About half an ounce of the

tincture, with three ounces of water, is a sudorificdose for an adult, if he attend to keep himselfwarm.3. Combined with an alkali.

HjEmatoxylon campechianum. Ed. Dub. Land.

Willd. g. 830, sp. 10. Decandria Monogynia ___Nat. ord.

Lomentacece.Logwood.

Of—The wood.

Lignum h^ematoxyli campechiani, v. s. Lignum Cam-pechense. Ed.Lignum h^matoxyli. Lo?id. Dub.

This tree was introduced from the Honduras into Jamaica^where it is now very common. The wood is firm, heavy,and of a dark red colour. Its taste is sweet, with a slight de-gree of astringency. It forms a precipitate with a solution ofgelatine, very readily soluble in excess of gelatine, and withsulphate of iron it strikes a brighter blue than any other as-tringent I have tried. It is used principally as a dye-wood,but also with considerable advantage in medicine.

Its extract is sweet and slightly astringent; and is there-fore useful in obstinate diarrhoeas, and in chronic dysentery.

Helleborus.

Willd. g. 1089. Smith, g. "256. Polyandria Polygyria ___

Nat. ord. Multisiliqiue.

Sp. 2. Willd. Helleborus nicer. Ed. Lond. Dub.Black Hellebore.

Off, —Radix. The root.

This plant, which was formerly called Melampodium, isperennial, and grows wild in the mountainous parts of Au-stria, and on the Pyrenees and Appennines. The earlinessof its flowers, which sometimes appear in December, hasgained it a place in our gardens.

The roots consist of a black furrowed roundish head', aboutthe size of a nutmeg, from which sort articulated branchesarise, sending out numerous corrugated fibres, about the thick-