The motion picture projectionist (Nov 1929-Oct 1930)

October, 1930 Motion Picture Projectionist MOTION PICTURE PROJECTIONIST October, 1930 Vol. 3, No. 12 JAMES J. FINN, Editor Lester Isaac, Efficiency; J. H. Kurlander, Light; Arthur Gray, Conservation; John Kieley, Equipment; Samuel Wein, Research; R. H. McCullough, Sound Projection; Harry Rubin, Improvement; Victor Welman, Personnel; Sidney Burton, Production. Published monthly by Mancall Publishing Corp., 45 West 45th St., New York City. Subscription rates in U. S. and Canada: twenty-five cents per copy; two dollars per year; three dollars for two years. Add one dollar for foreign postage. Changes of address should be submitted three weeks in advance of publication date to insure receipt of current issue. Entered as second class matter Oct. 25, 1927, at Post Office, New York, N. Y., under the act of March 3, 1879. Canadian Representative H. N. Elliott, Suite 11, 27 Sherwood Ave.. Toronto, Canada. Australian Representative McGill's Agency 179 and 218 Elizabeth St. Melbourne, Australia Editorial & Advertising Office 45 West 45th St, New York City Film Noise Problem ANY mark in the sound track of the film that is not part of the sound record itself and which causes a change in the light entering the photo-electric cell will give rise to film noise. Film noise results from the sum total of all the markings along the sound track that do not belong there. Dust and dirt are the most prolific causes of film noise when they pass successfully through the sound gate, in addition to the troubles they cause when they accumulate in the gate. Whether it passes through or collects, dirt is an evil and should be carefully avoided. Dust may settle on the film during drying in the laboratory and become tightly embedded in the emulsion, it may become attached during processing, or it may come at any of the later handlings that the film is subjected to. The first instances are a laboratory problem; the later ones are a matter entirely in the hands of the projectionists. Finger marks and oil spots also follow from improper care and give loose dirt a foothold in attaching itself to the film. Scratches in the film may come Modern films require modern projection Light from National Projector Carbon arcs can be depended upon to show your pictures more clearly and more satisfactorily. National Projector Carbons provide an extra margin of light that insures a more successful picture from the audience standpoint . . . because the clear, flickerless light from these carbons brings out the scenes in every detail — in all their richness and motion. And they provide light more economically because they are made to burn more efficiently! Equip your theater with National Projector Carbons. NATIONAL CARBON CO., Inc. Carbon Sales Division: Cleveland, Ohio BRANCH SALES OFFICES New York, N. Y. Pittsburgh, Pa. Chicago, 111. Birmingham, Ala. San Francisco, Cal. Unit of Union Carbide and Carbon Corporation National Projector Carbons IN WESTERN CANADA! CANADIAN THEATRE SUPPLY CO. Authorized distributors for SIMPLEX— MOTIOGRAPH— POWERS— HOLMES and all theafre equipment of the leading manufacturers. Also, an extensive line of stage equipment. Complete Sound Picture Service! 306 Canada Building Winnipeg, Man., Canada Alberta Representative M. L. ADAMSON 1605 — 104th St., Edmonton, Alb., Canada