INTRODUCTION 



'613 Personal Hygiene. 



'6131 Climatic factors. 



6132 Foods. 



"6133 Beverages. 



'61333 Microscopic analysis. 



6 1 34 Care of the body. 



'6135 Habitations. 



* 6 1 3 6 Employment. 



6137 Rest and recreation. 



"6138 Nervous system. 



6139 Age and sex. 



614 Public Health. 



^6140 Form divisions [see Table BJ. 



-614 : Relation divisions. 



6141 Population. 



6142 State control of medicine. 



-6143 State control of sanitation. 



6144 Contagion and infection : general. 



'6145 Contagion and infection : special. 



6146 Disposal of the dead. 



^6147 Air and ground. 



6148 Casualties. 



6149 Veterinary sanitation. 



615 Materia Medica. 



^6150 Form divisions [see Table B]. 



615 : Relation divisions. 



'615 : 54 Pharmaceutical Chemistry. 



