454 SCIENCE OF HOME AND COMMUNITY 



ity, so that if the original film is received by ten o'clock P.M., 

 the positive films are ready to send out by two o'clock the 

 next morning. These films can then be taken out by the 

 early morning trains. These papers have regular subscribers 

 among the showmen, to whom the films are sent regularly. 

 Some of these papers are published weekly, some twice a 

 week, and doubtless in the near future they will be published 

 daily. 



Moving pictures in the schoolroom. There is a great op- 

 portunity for the use of moving pictures in schoolrooms. 

 Already some schools are being equipped with moving- 

 picture outfits. Geography can be made much more real 

 by means of moving pictures. Great mountains, lakes, and 

 rivers are easily shown, as are the activities of people in 

 various countries showing their costumes and habits. In 

 fact there seems almost no end to the possibilities of moving 

 pictures in geography. In elementary science many things 

 can be realistically shown, such as the opening of a flower, 

 the action of filings around a magnet, and the development 

 of the house fly. There are also great possibilities in con- 

 nection with literature. 



Trick pictures. Many unusual effects, impossible in real 

 life, are produced by tricks in the process of making and 

 showing the pictures. In order to make people appear 

 very large or very small, pictures are taken at different 

 distances, thus giving different-sized images. Then these 

 two films are printed one over the other so that the two 

 images appear on the screen at the same time. 



In picturing accidents the camera is stopped just before 

 the accident occurs and a dummy is substituted for the real 

 actor, and then the camera goes on taking pictures. Later 

 the dummy may be removed and the actor come back again. 



In order to show reversed action such as a pumpkin rolling 

 up hill or smoke going down a chimney, the film is unrolled 

 backwards, the last picture being shown first. 



