The educational screen (c1922-c1956])

Page scan 00045 from The educational screen

Record Details:

Title:
The educational screen
Date:
c1922-c1956]
Publisher:
[Chicago, Ill. : Educational Screen, Inc.]
Volume:
The educational screen
Leaf #:
00045
Language:
English
Collection:
Government & Law and Non-Theatrical Film
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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Page 40 The Educational Screen An ability to deliver far greater illumination to the screen than formerly was possible with a 300-watt source of light is the outstanding characteristic of the Spencer MK-3 Delineascope. The result is a brilliance of projection which is rivalled elsewhere only by higher priced instruments. This unusual optical efficiency is the result of Spencer's long years of experience in the design and manufacture of high quality lenses. Particularly important are the ventilation systems which protect the slides (either color or black-and- white) against heat damage. Write Dept. N12 for a descriptive folder. FOR AUDITORIUMS FOR CLASSROOMS FOR HOMES 200-waH, l50-w«tf. lOO-waff models Spencer Lens Company BUFFALO, NEW YORK Scietitific Instrument Division oj AMERICAN OPTICAL COMPANY 4) Sales Offices: N*wYock,Chicago,SanFrancisco,Wuhinglon,Boston,LoiAng<les,Dallas,Colurabu>,SI.Louii,PhiladclphI<,AII*nU