891. Alum Cataplasm.—Take any quantity of the white of eggs; agitate it with a large lump of alum, till it be coagulated.
892. Cataplasm of common Salt.—Take crumbs of bread, and linseed meal, of each equal parts; water, saturated with salt, a sufficient quantity to give it a proper consistency.
This poultice may be applied to the indolent swellings of the glands, in scrofulous habits, where the patient is deprived of the benefit of the sea air and water. A constant use of it will frequently occasion great inflammation of the skin, requiring a suspension of its use for a few days; but as soon as the inflammation subsides, it should be repeated. By the use of this poultice, strumous humors, and scrofulous enlargements, of a chronic nature, have been totally dispersed.
893. Cerate of Cantharides.—Take of spermaceti ointment, six drachms; cantharides, in fine powder, one drachm. Mix them together.
This is the proper application to keep up a constant discharge from the part to which a blister has been applied.