As far as science goes, breathing is known to be air breathed in and breathed out. When it is breathed in one gets oxygen from space, and when it is breathed out one throws carbonic acid into space. When one goes still further one knows that breathing keeps the lungs and the organs of breath going, that digestive gases are drawn in, and that one gets a greater digestive power.

• On the basis of that principle people are beginning to use breathing in physical exercises to make the body healthier.
• For some years now voice-producers have given greater importance to breath. In reality the breathing itself is voice, and the whole voice-construction depends upon breathing.
• Then again some physicians are beginning to see that many illnesses of the nerves, of the lungs, or of different nervous centers can often be helped by breathing.
• There seems to be a general awakening to the science of breath.
• And those who have practiced breathing in connection with physical culture or for the improvement of their particular condition, illness, or weakness, have found wonderful results.