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UNIVERSITY FILM FOUNDATION 167
In order to determine the magnitude of the nontheatrical market, the University Film Foundation secured from the leading manufacturers of portable projectors the number of sales made during the previous 10 years. After adjusting these figures for sales by other projector manufacturers, it was estimated that approximately 35,000 standard portable projectors were in use in the United States. While the number of projectors for booths was unknown, it seemed that a conservative estimate would be around 4,000 machines.
In addition to the above analysis of the market for educational films, the University Film Foundation made a survey of the various agencies supplying films and slides to the nontheatrical market.
There were only a few companies of substantial size which distributed strictly educational films.2 Bray Productions, Incorporated, of New York City, furnished a considerable part of the material used in visual education throughout the country. The company had a fairly large library of " educational" subjects of varying quality and length, many of which were prepared primarily for distribution to theaters. The films were usable in several fields of science. In 1928, the company was making no new material of an educational nature other than industrial films. Sale of the Bray "educational " library continued. Edited Pictures System, Incorporated, of New York City, had prints of a large number of films which it circulated to the nontheatrical field in New England. The subjects were educational and at the same time entertaining. Some prints had been sold to school systems and to university extension departments throughout the country. The Society for Visual Education, Incorporated, had prepared several years before a series of about 80 " school films'' in a wide variety of subjects, including civics, nature study, physics, physical geography, regional geography, and economic history. The company had been organized by a manufacturer of projection machines with the primary purpose of developing a market for projectors. Production of films had been discontinued for some time, but an office had been maintained for the sale and distribution of the films. A fourth company was a nonprofit organization which had been operating for only a few months. The organization was operating on a
2 See Educational Pictures, Incorporated, page 101.