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NA TURE-STUD Y REVIEW [11 :3— Mar., 1915 



6. Fuels used; chemistry of burning. 



7. Causes and effects of heat. 



VI. Ventilating the Home. 



Means for each of the above methods of heating. 

 Problems — 



What are the essential differences between the hot air, hot water, 



and steam systems of heating? 

 From the standpoint of heating alone which is the best system? 

 From the standpoint of ventilation which is the best system? 

 How can the advantages of the various systems from the standpoints 



of both heating and ventilation be combined in one system? 

 If the home is heated by stoves how may ventilation be secured? 

 In what ways is the burning of fuel in the furnace similar to the 



burning of food in our bodies? 

 What effects of heat are illustrated in these various methods of 

 heating? 



Seasonal Order of Topics 



II. 



Winter 

 Lighting the Home. 



1. Kerosene; capillarity in wick. 



2. Gas; relation of heat and light. 



3. Electricity. 



4. Protection from fire; fire extinguishers. 

 Problems — 



What principles are involved in the working of the kerosene lamp? 

 What advantages has gas over kerosene? 



What advantages has electricity over both gas and kerosene? 

 How do fire extinguishers work? 



The Home Water Supply. 



1 . Springs ; health considerations. 



2. Wells; types — dug, driven, bored, drilled. 



3. Cisterns; soft and hard water. 



4. Pumps; air pressure, the siphon. 



5. Hot water tanks. 



6. Pneumatic water system ; tank, pump, engine. 



7. City water supply; source; pressure. 



8. Ice; source, purity, methods of using; the ice chest; freezing ice 



cream. 



