The ribs are twenty-four in number, twelve on each side, and emerge from each side of the spinal column. The upper seven pair are known as "true ribs," being fastened to the breastbone direct, while the lower five pairs are called (false ribs) or "floating ribs," because they are not so fastened, the upper two of them being fastened by cartilage to the other ribs, the remainder having no cartilages, their forward ends being free. The ribs are moved in respiration by two superficial muscular layers, known as the intercostal muscles. The diaphragm, the muscular partition before alluded to, separates the chest box from the abdominal cavity. In the act of inhalation the muscles expand the lungs so that a vacuum is created and the air rushes in in accordance with the well known law of physics. Everything depends upon the muscles concerned in the process of respiration, which we may as, for convenience, term the "respiratory muscles." Without the aid of these muscles the lungs cannot expand, and upon the proper use and control of these muscles the Science of Breath largely depends. The proper control of these muscles will result in the ability to attain the maximum degree of lung expansion, and the greatest amount of the life giving properties of the air into the system. The Yogis classify Respiration into four general methods, viz: (1) High Breathing. (2) Mid Breathing. (3) Low Breathing. (4) Yogi Complete Breathing. We will give a general idea of the first three methods, and a more extended treatment of the fourth method, upon which the Yogi Science of Breath is largely based. (1) HIGH BREATHING. This form of breathing is known to the Western world as Clavicular Breathing, or Collarbone Breathing. One breathing in this way elevates the ribs and raises the collarbone and shoulders, at the same time drawing in the abdomen and pushing its contents up against the diaphragm, which in turn is raised. The upper part of the chest and lungs, which is the smallest, is used, and consequently but a minimum amount of air enters the lungs. In addition to this, the diaphragm being raised, there can be no expansion in that direction. A study of the anatomy of the chest will convince any student that in this way a maximum amount of effort is used to obtain a minimum amount of benefit. High Breathing is probably the worst form of breathing known to man and requires the greatest expenditure of energy with the smallest amount of benefit. It is an energy-wasting, poor-returns plan. It is quite common among the Western races, many women being addicted to It, and even singers, clergymen, lawyers and others, who should know better, using it ignorantly.