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October 1933 • American Cinematographer 251 are greater when working with unde- veloped picture negative because the risk of fogging is greater and because the area covered by picture, and conse- quently subject to damage, is larger than the area covered by sound track. The precautions previously suggested in con- nection with sound negative should, ac- cordingly, be more painstakingly ob- served when working with picture nega- tive. Mr. Fred Cage, in charge of Warner Bros.-First National Laboratories, who furnished this information on the break- down of predeveloped camera negative, reports that delays and difficulties en- countered are negligible and that the savings effected justify the use of the system. Since the picture covers the greater part of the film, camera negative, un- like sound negative, once exposed, can not be used again. As a consequence, the only saving resulting from breaking down the camera negative before de- velopment is the cost of the laboratory processing of the film that is not de- veloped. At the RKO Studios, a semi-automatic film notching device that may be at- tached directly to the camera or to the sound recording head is being developed by Mr. T. Winchester. This device will simplify and make possible faster notch- ing of film. Conclusion. —Faced with the necessity of decreasing the costs of production, the studios have sought economies in every phase of their work. The methods de- scribed in this paper are helping to re- duce costs without detriment to the qual- ity of the finished product. 1 HARRISON Special Effect Preferred by the leading Holly- wood Cinematographers. Used by Leading cameramen the world over. The Harrison Viewing Class Gives True Interpretation of photographic values of all colors. Harrison & Harrison 645 North Martel Avenue Hollywood, Calif. Phone WYoming 4501 Light Color FILTERS ARTREEVES DEPENDABLE SOUND RECORDING AND LABORATORY EQUIPMENT n Sirvanse escribirnos en vuestro idioma y tendremos sumo gusto en enviarles detalles completos. Demandez nos instructions en francais et brochures illustrees. Phone WYoming 4501 J-[oliy^ood Motion PicTure/CquipmemT (o. |Tp. 64 5 NORTH MARTEL AVE- CABLE ADDRESS ARTREEVES HOLLYWOOD, CALIFORNIA, U SA Model B Professional $300.00 For Bell & Howell and Mitchell Cameras and their respective Tripod. With the ORIGINAL instant release telescopic handle. FRED HOEFNER GLadstone 0243 5319 Santa Monica Boulevard LOS ANCELES, CALIF. New Prices TRUEBALL TRIPOD H EADS OF SPECIAL ALLOY LICHTER WEICHT The Same Efficient Head For follow shots, known for their smoothness of opera- tion and equal tension on all movements. Unaffected by temper- ature. Mode| A for Ama- teur motion picture cameras. Attaches to any standard STILL tripod, $12.00. Trueball tripod heads are unexcelled for simplicity, ac- curacy and speed of operation. The Hoefner four- inch Iris and Sun- shade combination is also a superior product.