EXERCISE 6.
Hold your left hand up in front of you with the palm facing you. Press the index finger and the middle finger tightly together. Bring the two still held tightly together down to the palm, and then back straight again, quickly, briskly and with muscular resistance. The motion should be from the knuckle joint. Naturally the other fingers will have a tendency to curl. It makes no difference if they do. Repeat this exercise twenty times.
Next practice this exercise using the middle and the ring fingers pressed together, letting the little finger and the index finger remain as straight as possible.
Do the same exercise with the little finger and the ring finger together.
These same motions should be gone through with the right hand.