Richardson's handbook of projection (1927)

Page scan 000400 from Richardson's handbook of projection

Record Details:

Title:
Richardson's handbook of projection
Date:
1927
Publisher:
New York : Chalmers Publishing Company
Volume:
Richardson's handbook of projection
Leaf #:
000400
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 01, 2024
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848 HANDBOOK OF PROJECTION FOR Figure 315-1 cleaning the converging lens, -which may be done, unless it is very dirty, by breathing on its cold surface and polishing with a soft, perfectly clean cloth, chamois skin, or with soft tissue paper; also see page 831. The same method may be pursued in cleaning the reflector, or both may be cleaned (manufacturer's recommendation) by washing with a weak solution of household ammonia, procurable at any grocery store. Use about one part of "household" ammonia to three of water.