CONTENTS

[THEORIES ON THE ORIGIN OF SPEECH]

THE VOCAL INSTRUMENT:

[THREE QUALITIES OF MUSICAL SOUNDS, LOUDNESS, PITCH AND TIMBRE]

THE VOCAL INSTRUMENT AND ITS THREE PARTS

[(1) THE BELLOWS AND ITS STRUCTURE: VOLUNTARY CONTROL OF BREATH]

[(2) THE REED CONTAINED IN THE VOICE-BOX OR LARYNX: ITS STRUCTURE AND ACTION]

[(3) THE RESONATOR AND ARTICULATOR, ITS STRUCTURE AND ACTION IN SONG AND SPEECH]

[PATHOLOGICAL DEGENERATIVE CHANGES PRODUCING SPEECH DEFECTS AND WHAT THEY TEACH]

[THE CEREBRAL MECHANISM OF SPEECH AND SONG]

[SPEECH AND RIGHT-HANDEDNESS]

[LOCALISATION OF SPEECH CENTRES IN THE BRAIN]

[THE PRIMARY SITE OF REVIVAL OF WORDS IN SILENT THOUGHT]

[CASE OF DEAFNESS ARISING FROM DESTRUCTION OF THE AUDITORY CENTRES IN THE BRAIN CAUSING LOSS OF SPEECH]

[THE PRIMARY REVIVAL OF SOME SENSATIONS IN THE BRAIN]

[PSYCHIC MECHANISM OF THE VOICE]

[!-- ILL --]