Influences of school life on eyesight : being the substance of a lecture delivered before the Sheffield and District Certificated Teachers' Association, on January 12th, 1884, and published at the request of the Committee / by Simeon Snell.

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Influences of school life on eyesight : being the substance of a lecture delivered before the Sheffield and District Certificated Teachers' Association, on January 12th, 1884, and published at the request of the Committee / by Simeon Snell. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.