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Dec., 1932] MOTION PICTURES IN U. S. NAVY .551
companied by lectures and data pertaining to spotting. The use of this form of the motion picture, it is needless to say, is highly confidential. The inauguration of stereoscopic or three-dimensional pictures would be invaluable in this class of work.
There is yet another class of service, silent at present, but rapidly entering the sound field. The Navy Recruiting Bureau, in addition to making and publishing film on subjects valuable to the recruiting service, is in charge of thousands of feet of film invaluable beyond measure, for the reason that it can not be replaced. This film consists of the motion pictures taken during the World War, of inestimable value in point of Naval strategy. This film was made 14 years ago, and the negatives have, therefore, been carefully stored over this period. Prints have been made, but so far as wear is concerned, the negatives are in good condition. The film is gradually deteriorating with age, and in a relatively short time will become too brittle to use safely for printing. There are at present about 100,000 feet of this film on hand. The Navy is at present investigating the possibilities of the so-called reconditioning processing. It can be appreciated that the adoption of any such treatment will be approached with extreme caution.
At the present time all Navy film is being "processed" after printing, so that new film is delivered already processed. The method used is fairly satisfactory, but the films have not to date been in the circuit long enough to enable us to reach a definite conclusion as to the merits of the process. No provision has so far been made for cleaning and reprocessing sound film at our exchanges; but this will eventually have to be done, as the volume of film in service increases and as the film is returned from the circuit in need of major repairs.
The Navy at present is greatly interested in discovering a satisfactory processing system that will render film oil-proof and waterproof, and will not allow dirt to accumulate or a deposit to be left on the film gates. This processing must not interfere with the quality of the sound or the scene. Any system that is to be used, to be successful for Naval service, must be such that the processing material will become an integral part of the film and emulsion structure after application. The material that is used must also be such that it will not chemically affect the film as to tensile strength or aging. This latter is important, as all Navy film is purchased outright, and is used for years before the subject becomes obsolete.
In addition to processing, a system of reconditioning the stored