EXERCISE 23.
Extend the fingers of the left hand, with the little finger away from you and the thumb opened and pointing away from the palm, that is toward your right. Bring the index finger down until it is at right angles to the palm, bending only at the knuckle joint.
Let the knuckle joint straighten up again and at the same time bend the other two joints of the finger, so that the finger tip goes down to the palm of your hand. Repeat this exercise five times without resistance, and then five times with resistance.
Continue the exercise of each finger of the left and right hands.