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OPTICS, con?d An Instrument for Photometric Calibra- tion of Lens Iris Scales, M. G. Towns- ley, 49: 111-122, Aug. 1947. Compensation of the Aperture Ratio Markings of a Photographic Lens for Absorption, Reflection, and Vignetting Losses, Irvine C. Gardner, 49s 96-110, Aug. 1947. Photometric Calibration of Lenses—Pref- ace, R. Kingslake, 49: 95, Aug. 1947. The Physical Properties and the Practical Application of the Zoomar Lens, Frank G. Back, 49: 57-63, July 1947. An Analysis of Low-Reflection Coatings as Applied to Glass, W. P. Strickland, 49: 27-36, July 1947. A Method for Determining the Shape of the Image Surface in 16-Mm Projec- tion, F. J. Kolb, Jr., A. C. Robertson and R. H. Talbot, 48: 569-585, June 1947. Seminar on Optics Held (Midwest Sec- tion Meeting), 48: 482, May 1947. Auto-Collimator and Slide Projector De- scribed (Midwest Section Meeting), 48: 271, Mar. 1947. A New Series of Camera Lenses for 16- Mm Cinematography, W. B. Rayton, 48: 211-216, Mar. 1947. Zoom Lens for Motion Picture Cameras with Single-Barrel Linear Movement, Frank G. Back, 47: 464-468, Dec. 1946. Naval Training-Type Epidiascope for Universal Projection of Solid Objects, Jacques Bolsey, 47: 418-425, Nov. 1946. Optical Problems of the Image Forma- tion in High-Speed Motion Picture Cameras, John Kudar, 47: 400-402, Nov. 1946. Nonintermittent Motion Picture Projec- tor with Variable Magnification, F. G. Back, 47: 248-253, Sept. 1946. The Photometric Calibration of Lens Apertures, Allen E. Murray, 47: 142- 151, Aug. 1946. A Lens Calibrating System, C. R. Daily, 46: 343-356, May 1946. American Standard Method of Determin- ing Resolving Power of 16-Mm Motion Picture Projection Lenses, Z22.53-1946, 46: 307-308, Apr. 1946. A System of Lens Stop Calibration by Transmission, Emmanuel Berlant, 46: 17-25, Jan. 1946. OSCILLOGRAPHY (see also HIGH-SPEED PHOTOGRAPHY). Techniques in High-Speed Cathode-Ray Oscillography, C. Berkley and H. P. Mansberg, 53: 549-578, Nov. 1949. Cathodc-Ray-Tube Applications in Pho- tography and Optics, Carl Berkley and Rudolf Feldt, 53: 64-85, July 1949. Wartime Naval Photography of the Elec- tronic Image, Francis X. Clasby and Robert A. Koch, 50: 189-198, Mar 1948. Photography: see CINEMATOGRAPHY, HIGH-SPEED PHOTOGRAPHY, and OSCILLOGRAPHY PHOTOMETRY (see also LIGHTING, OPTICS, and SCREEN BRIGHTNESS)_ Effects of Incorrect Color Temperature on Motion Picture Production, F. F. Crandell, K. Freund and L. Moen, 55: 67-87, July 1950. Light Measurement for Exposure Control, Don Norwood, 54: 585-602, May 1950. An Improved Photomultiplier Tube Color Densitometer, Monroe H. Sweet, 54: 35-62, Jan. 1950. Exposure Meter for High-Speed Photog- raphy, E. T. Higgons, 53: 545-548, Nov. 1949. A Simplified Method for Precision Cali- bration of Effective / Stops, F. G. Back, 49: 122-130, Aug. 1947. An Instrument for Photometric Calibra- tion of Lens Iris Scales, M. G. Towns- ley, 49: 111-122, Aug. 1947. Compensation of the Aperture Ratio Markings of a Photographic Lens for Absorption, Reflection, and Vignetting Losses, Irvine C. Gardner, 49: 96-110, Aug. 1947. 31