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Aid for the deaf
This image shows the early twentieth century invention of an instrument inspired by the telephone that can be carried in a handbag and used in order to improve hearing.
7.5 x 5 cm
black and white
- still image
- 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 (March 29, 1914), p. 11