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no more than 3 or 4 to 1 should be maintained at all times. In addition, since generally more than one camera is used in a television studio the camera angles must be carefully observed so that lighting will be adequate regardless of which camera is in operation. Furthermore, camera levels must be controlled in order to maintain a balance between cuts. It is much more important that this balance be
Fig. 8. Kastman 16-inm television projector, model 250.
observed when television recording than when producing a show which will be released only as a live show.
The sound portion of television recordings has been handled in numerous ways by the various studios throughout the country. Some of the best sound has been obtained through the use of tape recording which is synchronized electrically or by the use of perforated tape. Both single and double system recordings are still employed.
A new complete chain of equipment for either television recording or largescreen television projection by an intermediate film system has been developed by General Precision Laboratory, Inc.62 This equipment consists of a highquality monitor, 16-mm recording camera, rapid film processor and projector. The monitor is provided with electronic blanking for the frame-rate conversion and gradient correction circuits. The camera has the rapid pulldown required of all television recording cameras and a high-quality soundrecording head. The rapid film processor can be used directly with the camera or separately.53
During 1950 the Navy Special Devices Center continued their studies of television as a method of mass training in the Armed Services. The psychological studies to measure the relative effectiveness of television training showed conclusively a definite superiority over direct classroom instruction. In the spring of 1950 the Signal Corps Photographic Center collaborated with the Special Devices Center to present eight weeks of one-hour programs over a ten-city CBS network to reach approximately 5,000 reserves.
In continuing its investigations of new television equipment for Navy use, work was advanced toward the final design of a prefabricated classroom which could be mass produced in time of emergency.
The Navy experiments have attracted wide attention and have helped
Progress Committee Report
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