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Page 30
PROJECTION ENGINEERING
TALKING PICTURES
By Bernard Brown
A detailed discussion of the principles of construction and operation of sound film apparatus, including a complete history of its development. Of grreat importance is the full account of R.C.A. power system and the Western Electric speaker unit. Specially valuable for technicians and also the general reader. Many illustrations and charts. $3.00
TELEVISION:
TODAY AND TOMORROW
By Sydney A. Moseley and H. J. Barton-Chappie
The development of television, early experiments, and its present and probable commercial use. Well illustrated. $2.50
PHOTOELECTRIC CELLS
By Dr. Norman A. Campbell and Dorothy Ritchie
Comprehensive presentation of the practical application of photoelectric cells in television, sound projection, etc. Illustrated. $4.50
Write for descriptive lists.
ISAAC PITMAN & SONS
2 WEST 45th ST.
NEW YORK
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offer to mannfac* turers interested in,
EXPORT
ike services of a. dependable organization? "well established in the entire foreign field
AD. AUJRIEMA, Inc.
Manufacturers' Export Managers
116 Broad Street, New York, N. Y.
LdfliPM RECORDINGS
>vr^==** MADE TO ODDED
Finest Quality Instantaneous type metal alloy Sound-On-Disc and Phonograph recordings — 34 Hour Service. For Announcements^ Speeches, Vocal and Instrumental Ensembles. Silent MOVIES cued to Dialog Music and Sound Effects. Sample Dialog stock record $1.00 postpaid. ROYAL RECORDING & FILM STUDIOS Dep't-PE., 661 N. Michigan Ave., CHICAGO.
WAX RECORDING INSTRUMENTS
For Portable and Studio Purposes
R. W. NICHOLLS
119-28 Twenty-seventh Ave., College Point, L. Is, N. Y.
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SELL PORTABLE TALKIE SOUND-ON-FILM TO
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THEATRES, SCHOOLS, CHURCHES, CLUBS
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Write for manufacturers' prices on Soundheads, Photocells, Optical Systems, Rectifiers, Amplifiers, Horns, Faders, Synchronous Motors, Projectors, Lamphouses, Screens, Microphones, etc, !
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S.O.S. CORPORATION
*^*§§g^*
Dept. P.E.. 1600 Broadway, New York City
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PROJECTION ENGINEERING
has the largest paid circulation of any technical publication in the projection or theatrical fields.
See latest report of the Audit Bureau of Circulations and Standard Rate and Data
INDEX TO ADVERTISERS
Ad. Auriema, Inc 30
Amplion Products Corp 31
Bausch & Lomb Optical Co. Bell Equipment Corp.
23 6
Blue Seal Products Co 21
Blue Seal Sound Devices, Inc.
29
Canady Recording Equip. Co 25
Clarostat Mfg. Co., Inc 27
Eastman Kodak Co 21
ElectroAcoustic Products Co 27
H
Hoffman-Soons
23
32
Int'l. Projector Corp
Mc McGraw-Hill Book Co 28
N
National Carbon Co., Inc 1
Nicholls, R. W... 30
O
Operadio Mfg. Co Back Cover
Pacific Research Labs. .. .Second Cover Pitman & Sons, Isaac 30
Racon Electric Co., Inc 3
Royal Recording & Film Studios... 30
S
Samson Electric Co 5
Silver-Marshall, Inc Third. Cover
S.O.S. Corporation 30
W
Weber Machine Corp 29
Weston Elec. Instr. Corp 25