The surgical diseases of the ear / by Prof. von Troltsch. The mechanism of the ossicles and the membrana tympani / by Prof. Helmholtz ; translated from the German by James Hinton.

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The surgical diseases of the ear / by Prof. von Troltsch. The mechanism of the ossicles and the membrana tympani / by Prof. Helmholtz ; translated from the German by James Hinton. 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.