The teeth, in relation to beauty, voice and health. Being the result of twenty years' practical experience and assiduous study to produce the full development and regularity of those essential organs / by John Nicholles.

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The teeth, in relation to beauty, voice and health. Being the result of twenty years' practical experience and assiduous study to produce the full development and regularity of those essential organs / by John Nicholles. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.