Primary amputation of the upper extremity rarely to be practiced for musket-shot wounds, or for injuries of the soft parts; treatment of slight gunshot wounds of the head of the humerus; a depending opening for the exit of matter to be made, if not previously existing; the principal points to attend to in such cases; simple incised wounds of the joint; splintering of the head of the bone, or the passage of a ball through it, requires its being sawn off; cases for amputation of the arm; site of the operation, the head of the bone being uninjured; complete shattering of the arm; complicated with more or less severe injury of the chest or abdomen; if the latter not likely to cause a speedy dissolution, then amputation of the arm is to be performed; moderate hemorrhage or expectoration of blood, under such circumstances, not absolutely fatal; destructive injuries from rebounding or nearly spent round shot, or flat pieces of shell, without external signs of a wound; necessity for an immediate operation in such cases; amputation at the shoulder-joint; the fear of hemorrhage passed away; compression of the subclavian; amputation at the shoulder-joint for malignant disease of the bone and periosteum; the acromion and coracoid processes should not be exposed, nor is it necessary to deprive the glenoid cavity of its cartilage; the nerves to be cut short, after the operation has been completed, else they may cause distressing pain for life; primary amputation at the shoulder-joint a very simple operation; secondary amputation much less so; general directions prior to the operation; the operation by two flaps, external and internal; by one, or nearly one, upper flap; Lisfranc’s operation; modification of it by M. Baudens; difficulties of the secondary amputation; amputation of the arm immediately below the tuberosities of the humerus; excision of the head of the humerus; Langenbeck’s operation; this excision not easy of execution when the head and neck of the bone are broken from the shaft, nor in secondary operations: not to be practiced in every instance of compound fracture of the part; cases; injury of the head of the humerus, with much loss of the soft parts; giving way of the axillary artery during the treatment not a cause for amputation; the vessel to be tied above and below the opening, and the subclavian not to be ligatured till all other means have failed; amputation of the arm by the circular incision; cases requiring this operation; Mr. Luke’s operation by two flaps; excision of the elbow-joint; injuries of the joint not requiring this operation; cases in which it is admissible; mode of operating; amputation at the elbow-joint recommended, but not often performed; mode of operating; supposed advantage attending the retention of the olecranon; amputation of the forearm; seldom requisite; the flap operation preferable, particularly near the wrist; mode of operating; the circular operation