CATAPLASM CARBONIS LIGNI. Take a sufficient quantity of wood charcoal red hot from the fire, and having extinguished it by sprinkling dry sand over it, reduce it to very fine powder and incorporate in the simple cataplasm in a tepid state. Charcoal recently prepared has the property of absorbing those principles upon which the offensive odor of putrefying, animal substance depends. In the form of poultice it is an excellent application to foul and gangrenous ulcers, correcting their fetor and improving the condition of the sore. It should be frequently renewed. CONIUM CATAPLASM. Take of extract of poison hemlock (conium) two ounces, water a pint. Mix and add of bruised flax seed sufficient to produce a proper consistence. This cataplasm may be advantageously employed as an anodyne in cancerous, scrofulous, and other painful ulcers, but its liability to produce narcotic effects in consequence of the absorption of the active principle of the hemlock must not be overlooked. Sometimes a bag is made to contain a poultice, and such a bag should be used if we desire to apply a large poultice to the chest or abdomen. One can be made for the breast and for the back at the same time, and two straps over the shoulder may unite them. A hop poultice is a thin bag loosely filled with hops and wrung out of hot water. DRY FOMENTATIONS are sometimes employed. Thin bags filled with heated sand, ashes, salt, bran, or hops are used, to keep the heat applied to the skin; and to warm the feet and quicken the circulation in the extremities, hot bricks, bottles filled with water, &c., are applied. These should be rolled in hot flannel or at least enveloped in something. OF THE APPLICATION OF COLD.