PART IV. LIGHT IN THE HOME 



CHAPTER XV 

 SOURCES OF LIGHT FOR HOME USE 



Problems. i . To understand the importance of light 

 and eyes. 



2. To see what important properties of light we utilize. 



3. To understand how my home is lighted by natural means. 



4. To understand how my home is lighted by artificial 

 means. 



5. To compare the different types of lighting. 



Experiments and demonstrations. i. To show degrees of trans- 

 parency. 



2. To show the advantage of the mantle in gas lighting. 



3. To show how electricity may be changed into light. 



4. To show the advantage of tungsten over carbon lamps. 



Project I. To IMPROVE THE LIGHTING OF MY HOME. 



1. Take up question of quantity of light, natural and artificial, 

 for various kinds of work, and whether other devices would cut 

 down expense of artificial light. 



2. If some room is poorly lighted in daytime, can you devise a 

 remedy ? 



3. What about shades, glare, and harmful habits in the use of 

 light? 



4. Have you a satisfactory switch or button installation for turn- 

 ing lights on and off? Additional lamps needed anywhere? 



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