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The Audio-Visual Handbook
dual frames may be projected in any order desired. This practice grew out of the fact that amateur photographers in their educational projects frequently found only part of the pictures on any one roll of negative suitable for use. But it fits in exactly with the desire of
Photo Courtesy Society for Visual Education, Inc.
Section of a 35 mm. Double-Frame Filmstrip (Actual Size) many instructors not to be limited by the fixed sequence of views in a filmslide.
While this individual treatment of filmslides is more expensive than the filmstrip method, it is being developed extensively by some instructors who are creating and accumulating transposable lecture materials for their local school or college needs. It is also definitely provided for, in addition to the filmstrip method, in the Eastman Kodak Company's service to Kodachrome (color film) users.
Kodachrome Library
The Kodachrome library recently announced by the Society for Visual Education makes available to schools as well as churches and other educational groups a very complete collection of miniature (2" x 2") slides designed primarily for use in educational work. This library, which consists of more than twelve thousand miniature slides on individual subjects, is a valuable contribution to the audio-visual field.
In this library there are slides covering many courses, ranging from social studies and national parks to sciences such as entomology, zoology, embryology, botany, and geology. All the slides have been selected very carefully and a low cost per unit has been established for the material.
As a visual aid, full, natural-color transparencies of this kind are invaluable. In many instances, color has been shown to have greater effectiveness in teaching than black-and-white pictures, so this new development meets a logical need in visual education.