X CONTENTS 



PAGE 



VII. WEATHER AND CLIMATE ... 63 



Weather in the affairs of men. Weather as affected by highs 

 and lows.* The thermometer. Temperature records. Solar 

 heating.* General weather records.* 



VIII. AT OUR HOMES .... 77 



Rooms of the house and their furnishings. The cost of liv- 

 ing. Fires and burns. Accidents other than burns. 



IX. HOUSEHOLD CHEMISTRY ... 94 



A review of some chemical changes. The chemistry of clean- 

 ing. Acids, bases, and salts. Some carbonates.* 



X. THE HOME SURROUNDINGS . . . 101 



A garden in the life of a family. The care of a garden. 

 Tree planting. Trees of the neighborhood. Some plant 

 studies. Birds about our homes. 



XL LOCAL INDUSTRIES .... 117 



Some occupations of the community. Modern industrial 

 life. Sanitary conditions for the wage earner. 



XII. THE FARM, AND OUR FOOD SUPPLIES . 124 



The hen. Eggs. Poultry keeping. The horse. Cows 

 and the dairy industry. Some foodstuffs. Lessons on corn. 

 Fruits, and apple raising as an industry. Wheat and wheat 

 growing. Other foodstuffs. Origin and nature of soils. 

 Soil conditions in plant growth. Usefulness of plants to man. 



XIII. WORK AND MACHINES . . .160 



Meaning of the terms work and energy. Measurement of 

 work and energy. Classes of levers. Pulleys.* 



