CONTENTS. xi 



ON VOCAL SOUNDS. 



By JOHN GRAY M'KENDRICK and ALBERT A. GRAY. 



Voice Production — The Singing Voice— Tone Intensity — Tone Pitch — The Range 

 of the Voice — The Muscular Mechanisms which affect the Vocal Cords — Voice 

 Registers — The Quality of the Voice and Vowel Tones — Theories of Vowel 

 Tones — Wave-forms of Vowel Tones — The Fourierian Analysis of Wave-forms 

 — Phonograms — General Conclusion — The Consonants— Effect of the Cavities 

 in connection with the Larynx and Pharynx upon the Voice — Whispering 



page 1206 



THE SENSE OF TASTE. 



By J. B. HAYCRAFT. 



The Anatomical Mechanisms concerned in the Production of Taste, and the Regions 

 of Mucous Membrane which are involved — Taste Sensations — The Action of 

 Drugs on Taste — Modality and Quality of Taste — The Relationship between 

 Taste Sensations and the Chemico-Physical Properties of the Stimulus — After- 

 Tastes and Successive and Simultaneous Contrast .... page 1237 



THE SENSE OF SMELL. 



By J. B. HAYCRAFT. 



The Anatomical Data — The Passage of Air through the Nose— Olfactometry — 

 Hyperosmia and Anosmia— The Classification of Odours — The Law of Specific 

 Energy of the Senses — The Relationship between Smell and the Chemico- 

 Physical Properties of Odorous Bodies — The Physical Condition of the Stimul- 

 ant — The Simultaneous Action of Two Odours— The Psychology of Smell. 



page 1246 



Index of Subjects page 1261 



Index of Authors page 1336 



