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

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JOURNAL OF THE SOCIETY OF MOTION PICTURE ENGINEERS LOYD A. JONES, EDITOR pro tern. Associate Editors G. L. CHANIER P. MOLE S. E. SHEPPARD O. M. GLUNT W. B. RAYTON J. L. SPENCB A. C. HARDY P. E. SABINE L. T. TROLAND Volume XIV MARCH, 1930 Number 3 CONTENTS Page The Surface Treatment of Sound Film J. I. CRABTREE, OTTO SANDVIK, AND C. E. IVES 275 Characteristics of High Intensity Arcs D. B. JOY AND A. C. DOWNES 291 A Year of Sound HAROLD B. FRANKUN 302 The Optics of Motion Picture Projectors .... ARTHUR C. HARDY 309 Multiple Exposure Cinematography in Sound Pictures WILLIAM STULL 318 The Illusion of Sound and Picture JOHN L. CASS 323 Film Numbering Device for Cameras and Recorders M. W. PALMER 327 Water Cooling of Incandescent Lamps N. T. GORDON 332 The Development of Television and Radiomovies to Date. . . . C. FRANCIS JENKINS 344 A New Method of Blocking Out Splices in Sound Film J. I. CRABTREE AND C. E. IVES 349 A Light Intensity Meter J. L. McCoY 357 A New Synchronizing Apparatus for 16 Mm. Films with Disk Records WM. H. BRISTOL 361 Abstracts 366 Book Reviews 370 Officers 371 Committees 372 Resignations 374 Change of Address 374 Published Monthly by the SOCIETY OF MOTION PICTURE ENGINEERS 20th & Northampton Sts., Easton, Pa. Editorial Office: 343 State St., Rochester, N. Y.