The talkies (1930)

Page scan 000171 from The talkies

Record Details:

Title:
The talkies
Date:
1930
Publisher:
London: Crosby Lockwood and Son
Volume:
The talkies
Leaf #:
000171
Language:
English
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
August 29, 2024
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THE TALKIES IO9 stages of development and fixation; the noise produced by this film was found to be considerably greater than a similar piece of film which had not been developed and fixed. Furthermore, the noise produced by it was comparable with that produced by a sample which had been emulsioncoated and "processed" in the ordinary way. It was clear, therefore, that the trouble lay, not in the stages of manufacture, but in the laboratories of the studios. Further experiments showed that a film which has been fixed without having been developed is noisier than one which has. It has been suggested that the small amount of fog present in any unexposed but developed film probably tends to mask the noise due to the presence of dirt which has already been introduced, and which causes a larger variation of light falling on the photoelectric cell through clear film than film which has been covered with a uniform layer of silver deposit. This point of view is rather borne out by further experiments, which were undertaken to find out the amount of noise caused by repeated use in theatre projectors. It was found that, while the amount of background noise increases in more or less direct