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PROJECTION, contd Report of the Committee on 16-Mm and 8-Mm Motion Pictures, D. F. Ly- man, Chairman, 47: 107-110, July 1946. American Standard Reel Spindles for 16- Mm Motion Picture Projectors, Z22.50- 1946, 46: 302, Apr. 1946. 35-Afro (see also LIGHTING— Projec- tion) Interference Mirrors for Arc Projectors, G. J. Koch, 55: 439-442, Oct. 1950. A New Deluxe 35-Mm Motion Picture Projector Mechanism, H. J. Benham and R. H. Heacock, 55: 319-326, Sept. 1950. A New Heavy-Duty Professional Theater Projector, H. Griffin, 55: 313-318, Sept. 1950. Non-Intermittent Motion Picture Projec- tion, W. C. Plank, 54: 745-746, June 1950. New Brenkert Projection System for Drive-In Theaters, C. N. Batsel and H. J. Benham, 54: 483-491, Apr. 1950. Flicker in Motion Pictures: Further Stud- ies, Lorin D. Grignon, 51: 555-573, Dec. 1948; Errata, 52, 539, May 1949. The Gaumont-Kalee Model 21 Projector, L. Audiger and R. Robertson, 51: 269- 293, Sept. 1948. Projection Equipment for Screening Rooms, H. J. Benham, 51: 261-268, Sept. 1948. American Standard Picture Projection Aperture of 35-Mm Sound Motion Pic- ture Projectors, Z22.58-1947, 50: 286, Mar. 1948. Industrial Control Applied to the Projec- tion Room, M. A. Boyce and C. W. Hyten, 50: 248-253, Mar. 1948. Elimination of the Fire Hazard of Pro- jectors Using Nitrate Film, Lloyd Man- non, 50: 173-176, Feb. 1948. Design Factors in 35-Mm Intermittent Mechanisms, Arthur Hayek, 49: 405- 414, Nov. 1947. A Proposed Film Lock and Identification Band, Gare Schwartz, 48: 473-475> May 1947. A Projection Reel of Improved Design, Ellsworth S. Miller, 48: 261-268, Mar. 1947. Film Projectors for Television, Ralph V. Little, Jr., 48: 93-110, Feb. 1947. The High Cost of Poor Projection, Charles E. Lewis, 47: 295-298, Oct. 1946. American Standard Dimensions for Pro- jection Rooms and Lenses for Motion Picture Theaters, Z22.28-1946 (First Edition, Z22.28-1941), 47: 259, Sept 1946. The Waller Flexible Gunnery Trainer, Fred Waller, 47: 73-87, July 1946. The Application of Pure Mathematics to the Solution of Geneva Ratios, Ron W. Jones, 47: 55-62, July 1946. The Wartime Record and Post-War Fu- ture of Projection and Sound Equip- ment, Allen G. Smith, 46: 178-184, Mar. 1946. PULL-DOWN MECHANISMS Non-Intermittent Motion Picture Projec- tion, W. C. Plank, 54: 745-746, June 1950. Television Recording Camera Intermit- tent, J. M. Wall, 54: 732-734, June 1950. 35-Mm Process Projector, Harold Miller and E. C. Manderfeld, 51: 373-384, Oct. 1948. Design Progress in an 8-Mm Projector, Thomas J. Morgan, 49: 453-462, Nov. 1947. A Survey, 8-Mm Problems, Robert E. Lewis, 49: 439-452, Nov. 1947. Design Factors in 35-Mm Intermittent Mechanisms, Arthur Hayek, 49: 405- 414, Nov. 1947. Nonintermittent Motion Picture Projec- tor with Variable Magnification, F. G. Back, 47: 248-253, Sept. 1946. The Application of Pure Mathematics to the Solution of Geneva Ratios, Ron W. Jones, 47: 55-62, July 1946. Re-recording: see SOUND RECORDING • 34