International projectionist (Jan-Dec 1936)

September 1936 INTERNATIONAL PROJECTIONIST 29 Report of the Sound Committee. "A Review of the Quest for Constant Speed," E. W. Kellogg, RCA. "A New Type of Peak Reading Volume Indicator," F. L. Hopper, ERPI. "A Neon-Type Volume Indicator," S. Read, Jr., RCA. "A Neon Tube Oscilloscope as a Utility Instrument for the Projection Room," T. P. Hover, Ohio Theatre, Lima, Ohio. "The Schwarzkopf Method of Identifying Criminals," J. Frank, Jr., International Projector Corp. Demonstration Film Showing Several Applications of Photography with Polarized Light (Courtesy of American Society of Cinematographers, Inc., Hollywood, Calif.) "'Color Photography" (with demonstrations and motion pictures), C. E. K. Mees, Eastman Kodak Co. "The Kodak Research Laboratories," C. E. Kenneth Mees, Eastman Kodak Co. For Perfect Projection F S C REFLECTORS and CONDENSERS EXTRA HEAT-RESISTING FSC condensers are ground and highly polished to precision accuracy in curvature and focus. They will not discolor. Made of Pyrex type glass to withstand the heat. FSC reflectors are accurately made for correct focus, individually tested before shipment, and protected by a I heat-resisting backing that is non peeling. All FSC quality optical goods are, of course, guaranteed to give satisfactory performance. See your dealer about the FSC service on resilvering and repolish ing reflectors and condensers. FISH-SCHURMAN CORPORATION 230 East 45th Street New York N. Y. "Manufacture of Motion Picture Film," E. K. Carver, Eastman Kodak Co. "The Care of Slide-films and Motion Fie lure Film," C. G. Weber and J. R. Hill, National Bureau of Standards, Washington, D. C. "Fire Protection in the Motion Picture Industry," H. Anderson, Paramount Pictures. "The Projection of Lenticular Color Films," J. G. Capstaff, 0. E. Miller and L. S. Wilder, Eastman Kodak Co. "The Art of Lighting," G. Folsey, Hollywood, Calif. "Effect of Lens Aberrations Upon Image Quality," W. B. Rayton, Bausch & Lomb Optical Co. "Mercury Arcs of Increased Brightness and Efficiency," L. J. Buttolph, General Electric Vapor Lamp Co. Report of the Studio Lighting Committee. "Trick and Process Cinematography," J. A. Norling, Loucks & Norling Studios. "A Third-Dimension Effect in Animated Cartoons," J. E. Burks, Fleischer Studios. "Continuous Projection as Applied to Film-Viewing Machines," J. L. Spence, Akeley Camera, Inc. "New Recording Equipment" and "An Improved Reel-End Alarm," D. Canady, Canady Sound Appliance Co. "Three-Wire, Direct-Current Supply for Projector Arcs," C. C. Dash, Hertner Electric Co. "A Demonstration Triode Tube," F. E. Eklridge and H. F. Dart, Westinghouse Lamp Co. "New Theatre Reproducing Equipment," J. S. Pesce, RCA. Report of the Standards Committee. NEW W. E. 'MIRRORPHONIC THEATRE SOUND SYSTEM {Continued from page 14) type divides the amplifier output between the two elements in proper proportion. As every projectionist knows, a necessity for efficient operation is some provision for making daily tests of the speakers. Each Di-Phonic system in eludes a special speaker system operational test set, by means of which both the high and low-frequency elements may be operated singly and each individual speaker unit may be tested. This set may be installed in either the projection room or back-stage. For obvious reasons, projectionists should insist strenuously upon installation of these test sets in the projec Dependability above all things is the prime requisite of a projection lamp. This essential characteristic is dependent on correct design — highest engineering skill — careful manufacture. Strong spares no expense to attain trustworthiness— the ability to render faithful, trouble-free service and to withstand long, continuous use at high amperages. See a demonstration in your own theatre. Any Independent Theatre Equipment Dealer will, without obligation, demonstrate the lamp meeting your requirements. Write today for the new, interesting and instructive catalog. The Strong Electric Corp. 2501 Lagrange Street Toledo, Ohio. U. S. A. Export Offices Room 301, 220 W. 42nd St., New York City Clayton Quality Products • Clayton even tension take-ups are made for all projectors and sound equipments. • Also the maker of the Clayton combination even tension winder and brake. CLAYTON PRODUCTS CO. 31-45 Tibbett Avenue New York, N. Y.