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140 ^> ^> ^ The Motion Picture Industry
millimeters in width. The inability of producers to get together on a standard width possibly was a deterrent to any extensive adoption of the new film. Also, of course, there were serious problems as to its use growing out of the necessity for establishing screens in the theaters in which such film was to be exhibited. There is another reason why wide film has not been so generally experimented with in theaters. Producers, if they can avoid it, do not care to be rushed into a more or less revolutionary change of this character. In other words, they want to be prepared for the change, profiting by their experience with sound. These facts, plus the further consideration that wide film, like color, is adapted to certain types of pictures and not to others, have made the development of this experiment somewhat slower than in the case of some other devices, such as sound.
In the case of that other technical advance so commonly referred to as third dimension, the statement of the problem is enough to suggest to anyone at all familiar with the difficulties involved that third dimension pictures as conceived by most people are still a considerable way in the future. Here again, millions of dollars have been spent in an effort to get third dimension in both widths. When perfected, such a change will be revolutionary for production as well as for exhibition. It involves, of course, two essential conditions as pointed out by Dr. Herbert E. Ives of the Bell Telephone Laboratories, Incorporated:
The essential conditions for producing pictures in stereoscopic relief are two: First, separate pictures must be made from different points of view, corresponding to the two eyes; second, each eye of the observer must receive its appropriate view ... If stereoscopic projection is to be achieved in such a form that a large group of observers may simultaneously see the projected picture in relief, the distribution of the appropriate views to the two eyes must be accomplished for each observer. There are two places where the distribution may be made: the first is at the observers' eyes, the second is at the screen on which the picture is projected.