The vocal mechanism consists of three portions,--the breathing apparatus, the larynx with its appendages, and the resonance cavities. Vocal scientists apply their efforts to finding out the correct mode of action of each portion of the mechanism, and to formulating rules and exercises by which these correct actions can be acquired and combined for the production of perfect tones. The analysis of the traditional precepts also conforms to this general plan; each precept is referred to that portion of the vocal apparatus to which it seems best to apply. The outline of the principles of modern methods contained in the following chapters follows this general scheme. It must be understood at the start that on most of the doctrines included in Vocal Science there is no unanimity of opinion among either theorists or teachers. Far from this being the case, practically all the principles of Vocal Science are the subjects of controversy. CHAPTER II BREATHING AND BREATH-CONTROL It is generally considered that, as the breath is the foundation of singing, the manner of breathing is of vital importance to the singer. This subject has therefore received a vast amount of attention from vocal scientists, and the muscular actions of breathing have been exhaustively studied. Several sets of rules for inspiration and expiration are put forth by different authorities. But there is no occasion for going into a detailed discussion of the different modes of breathing advocated by the various schools, or of the theoretical arguments which each advances. It is sufficient to say that the modes of breathing most in vogue are five in number,--deep abdominal, lateral or costal, fixed high chest, clavicular, and diaphragmatic-abdominal. However, on experimenting with these five systems of breathing, it is found that the number may be reduced to two; of these the others are but slight modifications. In one system of inspiration the abdomen is protruded, while the upper chest is held firm, the greatest expansion being at the base of the lungs. In the other mode of taking breath the abdomen is slightly drawn in, while the chest is expanded in every direction, upward, laterally, forward, and backward. In this system the upper chest is held in a fixed and high position. Necessarily the manner of filling the lungs involves the manner in which they are emptied. Opinions are practically unanimous as to the proper position of the singer before taking breath, that is, at the end of an expiration. The singer must stand erect, the weight of the body evenly supported on the balls of both feet, with the whole body in a condition of lithe suppleness. In both systems of breathing the manner of expiration is simply a return to this position.