xvi CONTENTS 



CHAPTER XV 



PAGE 



SPECIAL USES OF MUSCLES 207 



Review Bones as Levers Standing Walking and Run- 

 ning Muscles of Expression The Larynx and its Use Voice 

 Sounds Care of the Voice Summary of the Main Points. 



CHAPTER XVI 



THE NERVOUS SYSTEM . . . 219 



Plan of the Nervous System Nerve Tissue The Nerves 

 The Spinal Cord The Brain The Bulb The Cerebellum 

 The Cerebrum The Sympathetic Nervous System Mind and 

 Brain Summary, of the Main Points. 



CHAPTER XVII 



CARE AND TRAINING OF THE NERVOUS SYSTEM .... 239 



Food and Air Exercise Education Habit P^atigue 

 and Overwork Rest and Sleep Alcohol Tobacco Sum- 

 mary of the Main Points. 



CHAPTER XVIII 



THE SPECIAL SENSES AND SENSATIONS . . .- . . .253 



Sensations General Senses The Sense of Touch The 

 Sense of Taste The Sense of Smell The Sense of Hearing 

 The External Ear The Middle Ear The Inner Ear The 

 Course of a Sound Wave Care of the Ear The Sense of 

 Sight The Eyeball Muscles of the Eye Appendages of the 

 Eye The Inside of the Eyeball The Course of Light De- 

 fective Vision Care of the Eyes Summary of the Main Points. 



CHAPTER XIX 



BACTERIA AND DISEASES 279 



Bacteria Bacteria as our Friends Bacteria as Enemies 

 How Disease Germs get into the Body Disease Germs in the 

 Body Consumption Pneumonia Cholera Typhoid Fever 

 Dysentery Diphtheria Scarlet Fever Measles Small- 

 pox Mumps Whooping Cough Malarial Fever Yellow 

 Fever Grippe Pink Eye Summary of the Main Points. 



