Let us again consider the diaphragm. What is it? We have seen that it is the great partition muscle, which separates the chest and its contents from the abdomen and its contents. When at rest it presents a concave surface to the abdomen. That is, the diaphragm as viewed from the abdomen would seem like the sky as viewed from the earth--the interior of an arched surface. Consequently the side of the diaphragm toward the chest organs is like a protruding rounded surface--like a hill. When the diaphragm is brought into use the hill formation is lowered and the diaphragm presses upon the abdominal organs and forces out the abdomen. In Low Breathing, the lungs are given freer play than in the methods already mentioned, and consequently more air is inhaled. This fact has led the majority of Western writers to speak and write of Low Breathing (which they call Abdominal Breathing) as the highest and best method known to science. But the Oriental Yogi has long known of a better method, and some few Western writers have also recognized this fact. The trouble with all methods of breathing, other than "Yogi Complete Breathing" is that in none of these methods do the lungs become filled with air--at the best only a portion of the lung space is filled, even in Low Breathing. High Breathing fills only the upper portion of the lungs. Mid Breathing fills only the middle and a portion of the upper parts. Low Breathing fills only the lower and middle parts. It is evident that any method that fills the entire lung space must be far preferable to those filling only certain parts Any method which will fill the entire lung space must be the greatest value to Man in the way of allowing him to absorb the greatest quantity of oxygen and to store away the greatest amount of prana. The Complete Breath is known to the Yogis to be the best method of respiration known to science. THE YOGI COMPLETE BREATH. Yogi Complete Breathing includes all the good points of High Breathing, Mid Breathing and Low Breathing, with the objectionable features of each eliminated. It brings into play the entire respiratory apparatus, every part of the lungs, every air-cell, every respiratory muscle. The entire respiratory organism responds to this method of breathing, and the maximum amount of benefit is derived from the minimum expenditure of energy. The chest cavity is increased to its normal limits in all directions and every part of the machinery performs its natural work and functions.