Observations on the instruction of blind persons, in a letter to Roberts Vaux, John Vaughan, and Robert Walsh, esquires / by Julius R. Friedlander.

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Observations on the instruction of blind persons, in a letter to Roberts Vaux, John Vaughan, and Robert Walsh, esquires / by Julius R. Friedlander. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)