Removal of the whole or of a portion of various bones is frequently required in injuries by which their integrity has been destroyed, and after disease which has resulted in death of the bone. The object of the resection is to promote the repair of the diseased or injured part In case of death of portions of bone, removal is only performed after the dead bone has fully separated from the new. The wise surgeon always endeavors, in the resection of bones, to leave the periosteum of the bone as nearly intact as possible, as by so doing a new formation of bone may occur.

A few years ago, we removed from the thigh of a young man who had been crippled for several years, several inches of dead bone, involving a considerable portion of the shaft of the femur which had undergone decay, or necrosis, and was separated from the healthy bone. The formation of a new bone had already begun, and progressed rapidly after the operation, so that in the course of a few months the young man pronounced his once crippled and diseased leg stronger and more vigorous than the other. We hardly think this was really the case; but the patient was led to his conclusions by the fact that the newly formed bone was larger than the other one, and he did not encounter the slightest inconvenience in its use.

Inflammation of the Joint-Acute inflammation of the joint begins with swelling, heat, and pain, but very slight fever. The joint is distended by a great increase of serum and synovia. The treatment of this form of disease is simply rest, and the application of fomentations three or four times a day, with tepid compresses the balance of the time. Recovery generally takes place quite rapidly.

Chronic inflammation of a joint may result from the acute form, or may be chronic from the start. The joint is much swollen without either heat or pain. It most commonly affects the knee. The patient can generally walk quite easily, but exercise is fatiguing and increases the swelling. This is the so-called white swelling of the knee-joint. (For treatment see "Synovitis.")