_Percussion Instruments._ The snare drum offers motion to the wrists, elbows and shoulders. Few men or children can resist the temptation to play the snare drum. The desire for prolonged playing is not too great, but if recorded music is played during the exercise the duration can be prolonged for an adequate period. The bass drum, as previously mentioned, permits flexion and extension of the ankle when used with the pedal, and this, too, can be made interesting if recorded music is played simultaneously. Other percussion instruments may not be generally available in hospitals but the possibilities offered by them will be listed. The kettle drum offers rotation of the arms. The xylophone and marimba do not evoke great ranges of motion but bring the muscles of the upper extremities, neck, and back into play, and promote co-ordination. For children, the toy xylophone is a welcome plaything and an excellent form of occupational therapy for the upper extremities. A new toy, the _Typatune_, operated like a typewriter affords opportunity for finger exercise. There are still other instruments which may be classed as musical that offer opportunities for exercise. It is just possible that a portable hand organ may be available. The novelty of operating one of these is not to be underestimated as an incentive to work, particularly in younger people. Both the hurdy-gurdy and the hand-cranked victrola offer exercise to the wrist, elbow and shoulder. By placing these instruments at different distances from the floor or patient, many ranges of motion can be obtained. The harp offers excellent exercise to the serratus muscles as well as to the muscles and joints of the upper extremities, but its operation is more complicated than that of most instruments, and even if available, would require the instruction of a harpist, of whom there are too few. TECHNIQUE