lips uniformly closed.

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The voice takes different names, according to the different sounds in
each family of vowels: the chest-voice, the medium voice and the
head-voice.

These names imply no change in the sort of voice, but a change in the
manner of emission. The head, medium or chest-voice, indicates only
variety in the emission of vowels, and may be applied to the high as
well as the deep and medium voice. Thus the deep voice may produce
sounds in the head-voice, as well as in the medium and chest voices.

The head-voice is produced by lowering the larynx, and at the same time
raising the uvula. In swallowing, the larynx rises by the elevation of
the uvula, without which elevation there can be no head-tones.



_Practical Conclusions._


1. It is highly important to know how to assume either of these voices
at will. The chest-voice is the expression of the sensitive or vital
life, and is the interpreter of all physical emotions. The medium voice
expresses sentiment and the moral emotions. The head-voice interprets
everything pertaining to scientific or mental phenomena. By observing
the laugh in the vital, moral and intellectual states, we shall see that