Brought from the bay of Campeachy in America. Logwood; also called Acacia Zeylanica, lignum Campescanum, sappan lignum, tsiam pangam, lignum Campechianum, Indi-cum montanum lignum, lignum tinctile Campech. Cam-reachy, Brasil, or Jamaica wood.

It is the wood of a prickley pod bearing tree, a native of Campeachy island. It is brought to Europe in large compact logs of a red colour. Its fruit resemble cloves in their quality. It is the haematoxylon campechianum Lin. Sp. Plant. 549. Nat. order lomenta-cete. Haematoxvlon, (from Campechense Lignum 1670 blood, and wood,) also called erythroxylon.

This wood, of which the tree is a native of Honduras, is chiefly brought for the dyers, but used medicinally as an astringent or corroborant. It is peculiarly efficacious in diarrhoeas, and in the last stages of dysentery. When the obstructing causes are removed it restrains the discharge, without contracting the fibres like astringents: it sheaths acrimony, and its astringent taste is combined with a sweetish mucilaginous one; strengthens the bowels, and perhaps the general habit. It is an agreeable medicine, being free from any thing disgusting to the taste, and almost void of smell.

The London college direct a pound of the shavings of logwood to be boiled in a gallon of distilled water to half; this must be repeated four times. The fluids must be mixed, strained, and boiled to a proper consistence. The shavings are ordered to prevent it from being mixed with the Jamaica, or other cheaper woods; which might be the case if bought in powder. The dose is from Э i to 3ss. repeated according to the urgency of the symptoms.

Rectified spirit of wine takes up more from this wood than water; therefore it is better to digest its powder in as much spirit as will cover it three or four fingers' breadth above its surface, then boil the residuum in water, as directed above. The watery men-stura are first evaporated to the consistence of honey, then the spirituous extract, formed by drawing off the sprit, is mixed with it.

The decoction of logwood is made by boiling three ounces of powdered logwood in four pints of water to two, at the end of which two drachms of cinnamon are added, and boiled together a few minutes. When cool the decoction is strained.

Both the extract and decoction are agreeable, mild, and safe, when stronger astringents are less advisable; and may be used with equal safety whether a fever attends or not. These preparations make the stools and urine appear like blood. The decoction may be taken in the quantity of four ounces three or four times a day.

The preparations of this wood are chiefly held in esteem for their astringency, and may be given safely in fluxes and at theclose of dysentery; but in the beginning they are hurtful. Cullen.

When flatulencies attend in diarrhoeas and dysen-teries, a few grains of the cortex elutheriae is a proper addition to each dose of the above extract or decoction. See Lewis's Mat. Med. Neumann's Chemical Works, and Cullen's Mat Med.