The graphic laboratory of popular science : Mussolini's pitch graph shows pitch level close to 190 vibrations
Benito Mussolini's photograph is seen next to a pitch graph of his radio speech given on September 20, 1938.
1939-05-28
6.1 x 15.3 cm
Tribune Company
grayscale
- English
- still image
- text
- These materials are either in the public domain, according to U.S. copyright law, or permission has been obtained from rights owners. The digital version and supplementary materials are available for all educational uses worldwide.
- The Janet A. Ginsburg Chicago Tribune Image Collection
- Chicago Sunday Tribune (May 28, 1939), p. 8
- application/pdf
- image/jpeg
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