Spread the ointment on a piece of lint large enough to cover the joint, and to extend four or six inches above and below it; then wash the joint with warm water and soap and dry it carefully; next sponge it well with the spirit of camphor for five minutes. Tear the lint into strips and wrap it round the joint; then strap the part firmly from below upwards over the lint with strips of diachylon plaster, each overlapping the preceding. Lastly, envelope the joint in a thin layer of cotton wool, and roll a bandage soaked in starch over all. If the patient wears no other kind of splint the bandage may be strengthened by laying a piece of millboard well softened in boiling water along each side of the joint before the starch bandage is applied. As the enlargement of the joint shrinks, this application must be renewed, usually every fortnight is often enough. CHAPTER III. FRACTURES. HEAD AND TRUNK. =Fracture of the lower Jaw.—The External Splint and Bandage.=—A method requiring the lower jaw to be firmly fixed against the upper one while the broken bone knits. _Apparatus_.—1. One and a half yards of bandage four inches wide. 2. A piece of gutta-percha, sole leather, or binder’s millboard. 3. Dentists’ silk or wire. 4. Boiling hot, and cold water. Step 1. The fracture is first reduced. While the apparatus is being fitted, the recurrence of the displacement is prevented by the hands of an assistant, or by lacing the teeth together with stout silk or wire. It is well also to wet the patient’s chin with a sponge and cold water, to prevent the gutta-percha from sticking to his beard while it is soft.