8 CONTENTS 



CHAPTER PAGB 



XXII. THE LUNGS ........ 192 



XXIII. RESPIRATION OF THE TISSUES .... 206 



XXIV. THE AIR AND VENTILATION 220 



XXV. HEAT AND CLOTHING 233 



XXVI. EXCRETION AND SEWAGE 248 



XXVII. THE SKIN AND BATHING 256 



XXVIII. NERVES 266 



XXIX. THE SPINAL CORD . . . . . . . 276 



XXX. THE SYMPATHETIC NERVOUS SYSTEM . , .284 



XXXI. THE BRAIN 289 



XXXII. INFLUENCES WHICH AFFECT THE MIND . . -305 



XXXIII. EFFECTS OF NARCOTICS UPON THE MIND . -315 



XXXIV. TASTE, SMELL, AND HEARING . . . -323 

 XXXV. THE EYE . ' . , 333 



XXXVI. THE VOICE . 349 



XXXVII. BONES 357 



XXXVIII. JOINTS 364 



XXXIX. MUSCLES 371 



XL. BACTERIA AND DISEASE 382 



XLI. REPAIR OF INJURIES 397 



XLII. PUBLIC HYGIENE AND SANITATION . .405 



XLIII. INFECTIOUS DISEASES . . 416 



GLOSSARY 



433 



INDEX . ' . V * ' . 457 



