umstances, be light reading; and I
ask those who are truly anxious for information to give me patient
study, accompanied by careful reference to the diagrams. For students
who enter upon a perusal of these pages in such a spirit, this essay is
specially intended; and if I have succeeded in making plain to such as
these a really complicated subject, then my highest ambition will be
satisfied.

E. B.

_April, 1880._

CONTENTS.

PAGES

Introduction 1-7

The vocal organ as a musical instrument 8-61

Differences of the voice-box, or larynx, in children, women, and men 62-68

Movements of the voice-box, or larynx, which can be seen or felt 69-72

The laryngoscope, and how to use it 73-79

The teachings of the laryngoscope 80-105

Appendix--Hints on teaching 106-125

Appendix To The Ninth Edition--Voice Failure 126

Appendix To The Tenth Edition--Does Diaphragmatic
Breathing Apply Equally To Women As To Men? 141

Index 143

Index To "Voice Failure 146

Footnotes.

PLATES.

PAGES

I. General view of vocal organ _facing title_

II. The Lungs 10

III. The Chest 11

IV. Chest capacity--Methods of breathing 16

V. Side view of the Larynx 32

VI. Front view of the Larynx 33

VII. Larynx, Side view showing interior 37

VIII. Larynx, Side view, muscles, &c. 42

IX. Larynx, Side view, interior of left half 43

X. The Glottis in three states 46

XI. Larynx, Section viewed from above 48

XII. Larynx, Section viewed from behind 51

Sketch of Laryngoscope designed by Dr. Foulis 78

XIII. Laryngoscopic Image--Breathing 84

XIV. " " Upper thick register 84

XV. "