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©CIB 4 8701
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C^f OF THE
SOCIETY OF
MOTION PICTURE
ENGINEERS
CONTENTS
A Reproducing Machine for Picture and Sound. By H. Pfannen
stiehl 253
Scoring, Synchronizing and Re-Recording of Sound Pictures. By
K. F. Morgan 268
Public Announcements and Re-inforcement Systems for Theatres.
By J. B. Irwin 286
Servicing Sound Picture Equipm.ent in Theatres. By Coke Flanna
gan 293
Typical Problems in Process Photography. By Carrol Dunning. . . . 298
The Universal Camera Crane. By Frank Graves 303
Television Demonstration. By Herbert E. Ives 308
Seeing Sound and Hearing Pictures. By John Klenke 309
The Mitchell Recording Camera Equipped Interchangeably for Variable Area and Variable Density Sound Recording. By C. R.
Hanna 312
The Pyrene Combination Automatic Projector Fire Extinguisher
and Electric Cut-off. By R. B. Dickson 318
Results of the Experiment with Eastman Classroom Films. By
T. E. Finegan 324
The Studio Electrical Department and its Relation to Picture Production. By M. W. Palmer 341
Bulb Cleanser for Incandescent Lamps for Studio Lighting. By
D. K. Wright and C. E. Egeler 346
Motion Picture Activities of the Army. By Major W. E. Prosser. . 355 Some Properties of Fixing Baths. Bv J. I. Crabtree and H. A.
Hart 364
Some Properties of a Fine Grained Developer. By J. I. Crabtree
and H. C. Carlton 406
Borax Developer Characteristics. By H. Moyse and D. R. White. . 445 Dry Cell Batteries for Recording and Projecting. By W. B.
Schulte 453
A Standard Micro-Cinematographic Apparatus. By Heinz Rosen
berger 461
Permeable Projection Screens for Sound Pictures. By A. L.
Raven 465
The Academy of Motion Picture Arts and Sciences. By Frank
Woods . 470
Photographic Astronomy. By Leslie E. Cuffe 474
Photographing with Multiple Cameras. By Karl Struss 477
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Volume XII L Number 38
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MEETING OF MAY 6-9, 1929 NEW YORK, N. Y.