D. A. Clippinger, The Head Voice and Other Problems…
“ The one important thing in breath management is the diaphragm. If the student has the right action of the diaphragm he will have no further trouble with breath control. In my Systematic Voice Training will be found a list of exercises which thoroughly cover the subject of breath control and if properly used will correct all errors. Let this be understood, that there is nothing in correct breathing that should make one tired. On the contrary the practice of breathing should leave one refreshed. Above all, the student should never make himself rigid when trying to control the flow of breath. ”
