Taking thread: Sound-Waves on a Cord 1922
Mr. W F Croll, who holds the parent, of a method of recording and reproducing sound-waves by means of a cellulose thread instead of by the generally known disc or cylinder record, saving space and weight
Picture No
10215652
Media ID
46345288
Size
3902px x 5807px
(2.9MB)
Credit
© Illustrated London News Ltd/Mary Evans
Source
Photographs in The Illustrated London News', 29 July 1922, page 167
Date
1922
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