Barbadoes aloes powdered, from 5 dr. to 1 oz. Hard soap 3 to 4 dr. Ginger 1 dr. Water 1 dr. Oil of cloves 10 drops. Beat the soap, oil of cloves, and water together in a mortar, so as to form a paste; if necessary use more water. Add the powdered aloes and ginger, and beat the whole into a ball.—_White._ CATTLE, _s._ Beasts of pasture, not wild or domestic. CAUF, _s._ A chest with holes, to keep fish alive in the water. CAVISSON, _s._ A head-stall provided with a nose-band and ring, to which a long cord is attached. The cavisson is used in the earlier stages of horse-breaking. CAUSTICS, _s._ Medicaments which, by their violent activity, and heat, destroy the texture of the part to which they are applied. The most powerful is the _actual_, or hot iron; but there are many other caustics possessed of great strength, which speedily destroy the parts to which they are applied. If a solid caustic is wanted, nothing is more convenient than the lunar caustic (nitrate of silver). Milder caustics are more frequently used; such as sulphate of copper, red precipitate, (nitric oxide of mercury,) burnt alum, &c. Strong caustics are employed to destroy unhealthy or diseased parts; and for cleansing foul ulcers, so as to produce a healthy state, and render them curable by more simple applications. Caustics, divided into liquid and solid, are strong and mild. The mild are often called _escharotics_. SOLID CAUSTICS, STRONG. No. 1. The red-hot iron. (See FIRING.) 2. Pure potash with lime. 3. Nitrate of silver, or lunar caustic. 4. Nitrate of copper. MILD CAUSTICS, SOLID. No. 1. Acetate of copper, or distilled verdigris. 2. Sulphate of copper, or blue vitriol. 3. Red nitrated quicksilver, red precipitate, or nitric oxide of mercury. 4. Burnt alum. 5. Common verdigris. The _mild_ require to be finely powdered and sprinkled on the ulcer; and are sometimes mixed with digestive ointments to increase their power. STRONG CAUSTICS, LIQUID. No. 1. The sulphuric and nitrous acids, which must be used cautiously: they may be diluted with a sufficiency of water, to be applicable to the purpose required. 2. Nitrous acid 1 oz. Quicksilver ½ oz. Place them in a large gallipot, or open phial, and avoid the noxious fumes which arise. When the quicksilver is perfectly dissolved, and the mixture cold, it may be put into a phial and corked.