Motion-Pictures on Glass 



G. Bettini, the distinguished inventor, substitutes glass plates for 

 celluloid film and thus gives the motion -picture industry a new turn 



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The glass plate substitute for celluloid film. The images are each one quarter of 

 an inch square, and there are five hundred and seventy-six images on each plate. 

 One glass plate is equivalent to about seventy-five feet of standard film. At the right 

 is Mr. Bettini and his projector, with the plate in position for showing motion-pictures 



WHEN a cheap, durable, non-inflam- 

 mable substitute for the ordinary 

 motion-picture celluloid film is 

 found, we may expect to see motion- 

 picture machines enter our homes and take 

 a place beside the phonograph. So long as 

 the cost of film is excessive, as it is at 

 present, and so long as 

 the film is inflammable, 

 as it always has been and 

 may continue to be, it will be 

 difficult to popularize home 

 motion-pictures. 



To overcome these diffi- 

 culties, G. Bettini, of New 

 York, has invented several 

 cameras and projectors in 

 which ordinary cheap glass 

 plates take the place of the 

 usual expensive film. For 

 instance, he has evolved a 

 motion-picture camera that 

 utilizes glass plates in place 

 of the usual film; a motion- 

 picture projector for the 

 home which uses the same glass plates; a 

 second projector which utilizes circular 

 non-inflammable disks; a machine which 



NX - PRISM 



CS ^PlATt 



The Bettini principle of pro- 

 jection. The light from the 

 lantern strikes the prism and 

 is there bent at right angles 

 toward the image on the 

 plate. Passing through the 

 plate it enters the lens to 

 which the prism is attached, 

 and is thrown on the screen 



prints pictures on disks from standard film 

 subjects, and a mechanical printer which 

 makes square glass plate positives from 

 standard film. 



The glass plates which Mr. Bettini sub- 

 stitutes for celluloid films are the same as 

 those used in ordinary photography, the 



size being approximately 



five by eight and a half 

 inches. The images, ar- 

 ranged in vertical and hori- 

 zontal rows on a plate, are 

 each one-quarter of an inch 

 square. There are five 

 hundred and seventy-six 

 images to each plate, which 

 is equal to about seventy- 

 five feet of standard film. 

 The developing of the nega- 

 tive plates and the printing 

 of the positives is as easy as 

 in ordinary photography. 



The Bettini principle of 

 taking and projecting pic- 

 tures is novel yet simple. 

 The glass plate is moved downward, one 

 row at a time, while the camera lens or the 

 lantern lens (the lens for taking the picture 



SCREEN 



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