From the viewpoint of patient interest and instruction, the piano is the best instrument. When equipped with pianola fixtures, it is the one instrument that gives the widest range of activities. Because the piano is difficult to move, playing is restricted to the room in which it is housed and there need be no concern about its interference with other patients if the practice room is sound-proofed, or is situated some distance from the other patients. The piano offers excellent opportunity for flexion of the fingers and thumb, extension, abduction and adduction of the wrist, as well as flexion and abduction of the shoulders and exercise of the neck and back. The piano can be adapted for use by patients with extremities in hanging casts, which can be supported by sling arrangements attached to the piano or the patient’s neck. It can even be used satisfactorily with a cumbersome airplane splint if a very low bench is substituted for the usual piano chair. The height of the bench can be arranged so that the key-board and hand are on the same level, and the challenge of this position will make the patient try all the harder to use his fingers. For the contractures resulting from burns of the hands, the piano offers an excellent medium with which to increase joint motion. In depressing the keys the fingers are forcibly flexed. The key surface is much broader and easier to manage than that of the typewriter key. The piano, therefore, offers less of a psychological deterrent to use than does the typewriter. Mistakes at the piano are less annoying because there is nothing to erase but a memory, and the memory of unpleasant things is fortunately short-lived. By means of special musical arrangements and additional notation written next to the printed notes, some fingers can be exercised singly or in any combination desired. The physical exercise or co-ordination of selected fingers can be obtained more subtly by the use of marked music than is possible with most crafts. Some instructors may prefer to mark the keys of the piano with the letters to which they correspond, but this is not really needed in the instruction of adults. A large diagram of the piano keys placed above the musical scale for which they stand may be located to advantage on the wall over the piano.