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New instruments to eyesight : another new instrument demonstrated
A person demonstrates the synotophone, which is used to correct squint and train blind eyes.
7.8 x 9.6 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 (November 12, 1933), p. 2
- Acme Newspictures (New York, N.Y.)