12. The sunlight changes the color of many objects. 



a. Tans the skin and causes freckles. 



b. Fades and bleaches color from paper and 

 clothes. 



Experiment 13. The effect of sunlight 

 on color.. Bleaching. 



c. The sunlight affects chemical or photo- 



graphic paper. (See Section 70.) 



Experiment 14. Leaf and other blue 

 prints. 



13. The sunlight good for the health. 



a. Sunbaths. 



b. Dark corners gather dirt and disease. 



14. Light travels in straight lines. 



Experiment 15. To show how light 



travels. 

 Experiment 16. How to make and use a 



pin-hole camera. 



1 5. The reflection of light. 



a. Regular reflection of light. 



Experiment 17. Experiments with mir- 

 rors. 



b. Diffused reflection of light. 



Experiment 18. How we see objects by 

 diffused reflection of light. 



16. Light from sources other than the sun. 



a. Light with heat. 



Experiment 19. Ordinary sources of 

 light. 



b. Light without heat. 



Experiment 20. Cold light. 

 (This subject, Light, is continued in the work 

 for the sixth grade.) 



