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5¹

THE ARM.

The muscles of the palmar surface of the hand and tore-arm are stronger than those on the back of the hand and forearm.

Back Forearm. (See Fig. 2—N, page 34.)

Ali the movements that rcąuire the extcn$ion of the fingers or the over-extension of the hands will develop the baek forearm. For instancc, if the hands are tightly closed and are drawn in as far as possible towards the palmar surface of the forearm, and are then extended to their utmost, the muscles on the back of the forearm and hand are doing the work.

The Deltoid.—Round of shoulder. (See Fig. 1—B, page 34.)

This musclc is deveIoped by any moeement that will swing the straight arni to the height of the shoulder, or when it is at the height that will swing it from the side to the front. Another exercise is to let the handle and cord pass back of the body, then swing the hand down, out, and up to the height of the shoulders.

For the right deltoid, stand with the left side to the Ex-erciser. (See Fig. 23.)

Writcrs', typewriters', and telegraphrrs' tramp is a disease that it difficult to turę when it once scizcs a person. It should be prerented, and this tan only be done by taking time each day to derelop the muscles of the entire arm, ehest, and upper back. The clerk who has no time to attend the warnings given by an overworked set of nervcs will later pay very dearly for this negligence. The pre-monitory symptoms demand that morę attention be given to the adjacent parts of the body, but our advice is do n't Wait for these premonitory symptoms.