Journal of the Society of Motion Picture Engineers (1930-1949)

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New Products Further information about these items can be obtained direct from the addresses given. As in the case of technical papers, the Society is not responsible for manufacturers' statements, and publication of these items does not constitute endorsement of the products. Aluminized mirrors specifically designed for Schlieren observation and photography are now available from J. A. Maurer, Inc., Photographic Instrumentation Div., 37-01 31st St., Long Island City 1, N.Y. The Schlieren technique is being widely applied to such studies as air and gas flow, aerodynamics, ballistics, and combustion, permitting visualization and qualitative and quantitative analysis. These mirrors, manufactured by Optical Works Limited of London, England, are available in a number of standard sizes from 4 in. to 18 in. in diameter. Both spherical and plane mirrors are included in this series, with the spherical mirrors available in various focal lengths. These mirrors are manufactured to the highest practical optical precision and are mounted in precise mechanical mounts, permitting coarse and fine adjustment about the vertical and horizontal axes. Detachable metal covers are provided to protect the mirrors when not in use. Meetings American Institute of Electrical Engineers (Symposium on The Science of Music and Its Reproduction — 1st Lecture), Nov. 7, Engineering Societies Bldg., New York, Acoustical Society of America, Nov. 13-15, Balboa Park, San Diego, Calif. American Standards Association, Annual Meeting, Nov. 19, Waldorf-Astoria, New York, Society of Motion Picture and Television Engineers, Central Section Meeting (in conjunction with I.R.E.), Nov. 21, Western Society of Engineers, Chicago, 111. American Physical Society, Nov. 28-29, Washington University, St. Louis, Mo. Society of Motion Picture and Television Engineers, Central Section Meeting (in conjunction with Society of Photographic Engineers), Dec. 3, Bell & Howell Co., Chicago, American Institute of Chemical Engineers, Annual Meeting, Dec. 7-10, Cleveland, Ohio American Institute of Electrical Engineers (Symposium on The Science of Music and Its Reproduction — 2d Lecture), Dec. 11, Engineering Societies Bldg., New York, N.Y. American Institute of Electrical Engineers (Symposium on the Science of Music and Its Reproduction — 3d Lecture), Jan. 15, Engineering Societies Bldg., New York, N.Y. Institute of Radio Engineers Conference and Electronics Show, 5th Annual Southwestern Conference and Show, Feb. 5-7, San Antonio, Texas American Institute of Electrical Engineers (Symposium on the Science of Music and Its Reproduction — 4th Lecture), Feb. 20, Engineering Societies Bldg., New York, N.Y. 364