Diving.

Diving differs from plunging, inasmuch as the progress is caused by the action of the limbs instead of resulting simply from the spring. Care must be taken to exhale all impure air from the lungs, which may be done by contracting the shoulders and exhaling several times, pressing the abdomen at the same time, and then inhaling fresh air. This not only allows the body to remain longer under the water, but adds to its buoyancy. The act of diving is the same as that of swimming, the head acting as a rudder. One page 6 hand should, however, always be in advance of the head. Should the bottom be reached, the ascent is easily and quickly effected by a spring upwards. Otherwise by ceasing the action of the legs, raisng the hands in front of the body, keeping them together with the palms down, then the body, assisted by the whole frame, will quickly rise to the surface.