MOVING PICTURES 457 



has to watch only one needle, and a device is provided so 

 that the speed of the motors may be changed until the two 

 machines work in unison. This has now been perfected 

 to the stage where it works very satisfactorily, and these 

 machines are now found in many of our large cities. 



The talking movies have proven successful enough so 

 that we can get some idea of their possibilities when we have 

 seen and heard renowned men and women from distant parts 

 of the country, sometimes after their death. It will be a 

 wonderful thing for future generations to be able to see and 

 hear the great men and women of to-day. How much it 

 would be worth to us to-day if we could hear the voices and 

 see the actions of the great men who stand out conspicuous 

 in our country's history, like Grant and Lee, Washington 

 and Lincoln ! 



SUPPLEMENTARY QUESTIONS FOR CLASS DISCUSSION 



1. What were the first steps taken in the development of 

 the moving picture? 



2. What part did Thomas Edison play in the development 

 of the moving picture ? 



3. What was the relation between the development of the 

 movies and the development of photography? 



4. How does the moving-picture camera work ? 



5. How is the film developed and the positive made? 



6. How are the pictures thrown on the screen? 



7. What peculiarity of the action of the eye makes the 

 moving picture possible? 



8. What are some interesting educational applications 

 made of the movies ? 



9. What uses could be made in your school of moving 

 pictures ? 



10. How is the animated newspaper managed? 



1 1 . How are trick pictures produced ? 



12. Watch carefully the movies you attend and notice what 



