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Types of Visual Aids and Their Uses
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Photo Courtesy Society for Visual Education, Inc.
Slide Box for 100 2 "x2" Slides
These color films, when they are mounted between glass, may be a lasting part of a school's slide library. There is no cost of upkeep and the slides, being very small, can be filed simply and easily in sturdy cases which are now available at low cost. Metal files for 1500 slides are available at prices from $25 to $35, while wood and leather-covered cases are lower in price.
Because most of the current miniature camera work done by individuals is in double-frame size, many of the double-frame projectors are equipped with slide carriers for the projection of individually mounted frames, although the frame itself may have been clipped from either a double or a single frame or bantam filmstrip. By using different masks, any of the three sizes can be mounted between 2" x 2" glass plates. These miniature mountings are commonly held together by binding the edge with %" Scotch tape, which adheres tightly without moistening, but which can be removed quite easily if desired, also without moistening. This is a very important point when using such small bits of film, one side of which is covered with emulsion which can be spoiled easily if permitted to become damp.
Advantages. The introduction of the filmslide placed at the disposal of many schools, pictorial matter which had been too expensive or too limited in quantity to cover the needs of the average school. Glass slides were fine when they could be obtained; and, in the opinion of some, they still remain unequalled for brilliant projection. But schools which have had access only to a limited supply of glass slides and could not afford to purchase in that form more than a small portion of the materials needed for frequent use have found that filmslides and miniature slides are highly satisfactory substitutes at considerably lower cost. In fact, when economy becomes essential, the filmstrip is the best answer, and is so improved as to rival standard glass-slide quality.
Several of the advantages of the filmslide were presented by Mr. Bell in his discussion before the Fourth Annual Conference of Texas