Our home physician: a new and popular guide to the art of preserving health and treating disease; with plain advice for all the medical and surgical emergencies of the family . e depends on four main points. 1. The air must be moved against the chink of the glottis witha certain expulsive power. 2. The chink of the glottis must not exceed a certain the opening of the glottis extends more than one-twelfth or one-tenth of an inch, no more sound will arise. But the opening ismade chiefly by the glottis, ligamentosa, while the glottis cartila-ginea must remain closed to give rise to a
Our home physician: a new and popular guide to the art of preserving health and treating disease; with plain advice for all the medical and surgical emergencies of the family . e depends on four main points. 1. The air must be moved against the chink of the glottis witha certain expulsive power. 2. The chink of the glottis must not exceed a certain the opening of the glottis extends more than one-twelfth or one-tenth of an inch, no more sound will arise. But the opening ismade chiefly by the glottis, ligamentosa, while the glottis cartila-ginea must remain closed to give rise to a pure sound. 3. The vocal chords must every time have a defined tension, forif they be very much extended, a shrieking, piping sound is made,whereas, if they be much slackened, only a dull sound is produced,if at the same time the glottis be much shortened. 4. The excursive capability of the vocal chords must not be in-terfered with, and their elastic power must be fully intact, as theyare extended by the pressing forward column of air, and are thusdilated and elevated. The degree of tension depends on the powerof the stream of air and the elasticity of the vocal
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