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.

Licence: Public Domain Mark

Credit: 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. Source: Wellcome Collection.