458 SCIENCE OF HOME AND COMMUNITY 



are trick pictures. How many kinds of trick pictures can you 

 find? 



1 3. Which do you consider the most interesting trick pictures ? 



14. What are the special advantages of the talking movies? 



REFERENCES 



Cressey, Discoveries and Inventions of the Twentieth Century, 



E. P. Button Co., New York City. Pages 360-373. 

 Bench, Making the Movies, Macmillan Co., New York City. 

 Boubleday, Stories of Inventors, Boubleday Page and Co., 



New York City. Pages 113-131. 

 Johnson, Modern Inventions, F. A. Stokes Co., New York City. 



Chap. i. 

 Maule, Boys' Book of New Inventions, Grosset and Bunlap Co., 



New York City. Chaps. 5-6. 

 Welsh, A-B-C of Moving Pictures, Harper Bros., New York 



City. 

 Talbot, Moving Pictures, How They Are Made and Worked, 



J. B. Lippincott Co., Philadelphia. 



