51
2. POSTURE 57
3. POISONS FROM WITHOUT 64
4. TEETH AND GUMS 78

CHAPTER IV

ACTIVITY

1. WORK, PLAY, REST AND SLEEP 89
2. SERENITY AND POISE 105

CHAPTER V

HYGIENE IN GENERAL

1. THE FIFTEEN RULES OF HYGIENE 119
2. THE UNITY OF HYGIENE 121
3. THE OBSTACLES TO HYGIENE 126
4. THE POSSIBILITIES OF HYGIENE 135
5. HYGIENE AND CIVILIZATION 143
6. THE FIELDS OF HYGIENE 157

SUPPLEMENTARY NOTES ON SPECIAL SUBJECTS

1. NOTES ON FOOD 171
2. NOTES ON OVERWEIGHT AND UNDERWEIGHT 212
3. NOTES ON POSTURE 221
4. NOTES ON ALCOHOL 227
5. NOTES ON TOBACCO 250
6. AVOIDING COLDS 272
7. SIGNS OF INCREASE OF THE DEGENERATIVE DISEASES 281
8. COMPARISON OF DEGENERATIVE TENDENCIES AMONG NATIONS 286
9. EUGENICS 293

INDEX 325

HYGIENE REFERENCE BOARD

OF THE LIFE EXTENSION INSTITUTE, Inc.

IRVING FISHER, Chairman

Professor of Political Economy
Yale University

#Statistics#

WILLIAM J. HARRIS, Federal Trade Commission, United States Government.

CRESSY L. WILBUR, M.D., Director, Division of Vital Statistics, Dept. of
Health, State of New York.

WALTER F. WILLCOX, Professor of Economics and Statistics, Cornell
University.

#Public Health Administration#

HERMANN M. BIGGS, M.D., Commissioner of Health, State of New York.

RUPERT BLUE, M.D., Surgeon General, U. S. Public Health Service.

H. M. BRACKEN, M.D., Secretary Board of Health, State of Minnesota.

J. B. GREGG CUSTIS, President Board of Medical Supervisors, District of
Columbia.

SAMUEL G. DIXON, M.D., Commissioner of Health, State of Pennsylvania.

OSCAR DOWLING, M.D., President Board of Health, State of Lou