Hygienic as related to physiological principles--Hygiene in the widest sense--Unfavorable conditions in the public life of an artist--Qualifications for success--Technique and a public career--The isolation of the artist and its dangers--The need for greater preparation now than ever--Choral singing and its possible dangers--The tendencies of the Wagner music-drama--Special faults, as the "scoop," "_vibrato_," "_tremolo_," "pumping"--Desirability of consultations by teachers of the use of the voice--Things the voice-user should avoid--Mouth-toilets--Lozenges--The sipping of water--What one should and should not eat--Tea and Coffee--The whole subject of congestion from compression, straining, etc., of the utmost importance--A sore throat when frequent should give rise to inquiry as to methods--Constipation--Exercise--Bathing 251 CHAPTER XIX. FURTHER TREATMENT OF PHYSICAL AND MENTAL HYGIENE. Stammering and stuttering--Those who have broken down--The increase of the range of a voice--The part the student plays in settling such questions--Selections to be avoided--Conservation of energy--Change and contrast--The voice as related to the building in which it is produced--The listener and pauses--Nervousness, and how to ward it off--General conclusion 268 CHAPTER XX. REVIEW AND REVISION. The object of the speaker or singer--The idea of co-ordination--The study of vocalization may be considered a study of movements--The psychic condition--The instrument which is played upon--How is this instrument played upon?--Vibration of the air--Breathing--The aim of all training--The whole subject of breathing--Breathing exercises--The resonance chambers--The formation of vowels--Muscular efforts for the production of consonants--The pronunciation of words--General health of great importance 276 LIST OF ILLUSTRATIONS. FIG. PAGE Appearance of the larynx during phonation in two special cases (in colors) _Frontispiece_