of placing the hand in any position, as shown by dotted lines. This is kept in place by spring friction on the ball. The wrist cannot be made quite the natural shape—that we are able to produce without the ball-and-socket joint; but this must be, necessarily, round. This part, however, is usually covered with the cuff or sleeve and is not conspicuous.
No. 332 is a sectional view of the arm and hand. A forward impulse of the shoulder and stump causes traction of the cord, moving the geared segment wheels so as to raise the forearm to any degree of flexion, when it is retained in position by means of a latch passing through a spring post and locking automatically. The wearer is enabled to conveniently carry a coat, shawl, basket, etc., on the artificial arm. A pressure on the button underneath the arm releases the lock, and the forearm is again under control of the stump and shoulders. The spring in the hand is for keeping the thumb in position and is the same as we put in all hands with movable thumb.
Price, No. 331
With wood or rubber hand $70.00
Combination Table Knife and Fork
No. 333, page 72, represents one of these useful implements, designed and made expressly for those who have been deprived of the use of one hand, and no such person can afford to be without one for a day. The blade is thin steel, ground to a sharp edge and terminating in a fork. A rolling motion will cut the food, and a twist of the hand will bring the fork into position for use. No. 334 represents a leather sheath into which the knife can be inserted.
