CONTENTS XV 



Animal Products Used for Clothing. Animals which 

 Aid Man. Animal Pests. Scale Insects. The San 

 Jose Scale. The Codling Moth. The Chinch Bug. - 

 The Hessian Fly. Poisons for Crop Pests. Stomachic 

 Poisons. Contact Poisons. 



CHAPTER XXII 



MAN'S PLACE IN NATURE . . 372 



Man's Place among the Animals. Language. Man's 

 Tools and Weapons. The Home. 



CHAPTER XXIII 



FOODS AND NUTRITION y . . 379 



Need of Food. Bodily Energy. Measurement of 

 Food Values. Source of Food. Food Preservation as 

 Related to Food Supply. Transportation as Related to 

 Food Supply. The Manufacturer's Place in Food Supply. 



Nature's Food Factories. Kinds of Foods. Proteins. 



Nitric Acid Test for Protein. Biuret Test for Protein. 

 Carbohydrates. Starch. Glucoses. Fehling's Solution 

 Test. Sugars. Fats. Vitamines. Ash Constituents. 



- Water. Beverages. Al'cohol. Effects of Alcohol. 



How Alcohol is Made. Patent Medicines. Tobacco. 



- Purchase of Food. The Dietary. Table of Food 

 Values. Principles of Cooking. 



CHAPTER XXIV 



COMMUNITY SANITATION . . . . . . . . 40fi 



Sanitation. The Growth of Cities. Bacteria. 

 Germs. Source of Germs. Conditions Favorable to 

 Growth of Germs. Resisting Power of the Body. 

 Food and Disease. Danger in Milk. Preservatives. 

 Danger from Water. Public Drinking Cups, Towels, Etc. 



Street Cleaning. Garbage, Ashes, and Rubbish. Flies. 



Sewage Disposal and Public Health. Typhoid Fever. 

 Colds. Diphtheria. Pneumonia. Tuberculosis. Scar- 

 let Fever. Measles. Smallpox. Diseases Carried by 

 Insects. Malaria. Yellow Fever. Quarantine. Dis- 

 infectants. Fumigation. 



