374 GENERAL SCIENCE 



4. Should seats be so arranged as to have the light come from the 

 left side or from the right side? Why? 



5. Why do rooms lighted by indirect light have very few, if any, 

 shadows? 



6. In what part of a room is it better for a teacher to stand when 

 talking to her pupils before the window, or on the opposite side 

 of the room from the window? 



7. Why does a blow on the head make one see stars, especially 

 when delivered upon the back of the head where the brain is excited 

 by the optic nerve? 



8. Why is it difficult to see out of the window at night from a 

 lighted room? 



9. What kind of lights do you use in your home? 



10. How many candle power per square inch of light do you 

 obtain? 



11. How much more is this per square inch than the correct 

 amount per square inch? 



12. What warning has a person that the light is too bright? 



13. What kind of lighting system is best for a home? 



14. Why should a stage hall never be brilliantly lighted? 



15. Why are red lights bad danger signals? 



16. What kind of shades should be used for lights in halls? 



17. What is the best kind of shade used in a home? 



18. Why should paper be often cleaned in rooms which are not 

 well lighted by windows? 



19. What kind of paper is best for living rooms? 



20. What happens when deep green and light blue are placed 

 in a yellow light? 



21. What would be the color of red under a mercury arc, Tung- 

 sten lamp, an electric arc (long)? 



22. What would be the effect of light green under the same 

 lights? 



23. Why is light blue hard to match by a mercury light? 



24. What would be the effect on light green material if placed 

 in a room lighted by incandescent carbon lamps? 



25. What color would a red dress look on a stage if yellow light 

 w.ere .thrown upon it? A blue light? An orange light? 



