Jackson's Gymnastics for the Fingers and Wrist / being a system of gymnastics, based on anatomical principles, for developing and strengthening the muscles of the hand for musical, mechanical and medical purposes: with thirty-seven diagrams

by Edwin Ward Jackson

Although it is not easy to prescribe complete gymnastic exercises for the thumb, the following, if made vigorously, will, nevertheless, be found very effective.

First movement.

Fig. 13.

Fig. 14.

Stretch the fingers as far as possible away from one another, then press the hand firmly together, the thumb being held fast in the cavity of the hand; continue for a moment in this position, and then repeat the same movement, alternately opening and closing the hand.

Second movement.

Fig. 15.