The audio-visual handbook (1942)

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Types of Visual Aids and Their Uses 61 Cellophane Lantern Slides. The cellophane lantern slide is made by slipping a small sheet of cellophane, 314x4 inches in size, into a folded sheet of carbon paper and then typing on the cellophane sheet, through the carbon paper. If the typewriter does not give a good, clear impression on the cellophane sheet, remove the ribbon to permit the bare type to strike the carbon paper, as when cutting stencils. The copy should be planned carefully and typed on paper, confined to a space approximately 2^x3 inches in size, before an attempt is made to type it on the cellophane. In that way, the appearance of the slide may be made attractive by the use of proper spacing and arrangement of items to be included. It will be best to confine the copy to thirteen lines of single-space typing with thirty-two or thirtythree spaces to the line. The typing should begin at least one-half inch from the top of the cellophane sheet and three or four spaces from the left edge. The typed cellophane sheet is then separated from the carbon paper and bound between two pieces of plain lantern-slide cover glass. The binding tape may frame it entirely, or a small piece of tape on each edge will hold the glass firmly, if the slide is not to be preserved for future use. Hand written material, drawings, tracings, etc., may be imprinted on the cellophane sheets in a similar manner, by using a hard pencil or a stylus. The cellophane slide is a valuable teaching tool in the hands of the busy teacher. All sorts of reading exercises, outlines, and other matter, usually printed or written on the blackboard, may be put on such slides and kept for repeated use. Furthermore, pupils in the intermediate and advanced grades, including those in high school and college, may use the cellophane slides to good advantage in preparing reports and classroom discussions. The materials used are inexpensive and the results of their proper use are limited only by the energy and ability of the teacher. It is possible with the medium or heavy sheets of cellophane to trace from drawings or other outlines on the cellophane with India ink. Sometimes it is a little difficult to hold the cellophane in place while the tracing is being made, but this piece of cellophane placed between cover glasses makes a very satisfactory projected outline or diagram. Those who may have an excess supply of cellophane and a limited number of cover glasses may make up a series of slides on the cellophane sheets and simply insert these between two cover glasses which have been hinged with binding tape along one side. In this way two or three pairs of cover glasses will provide equipment