The sphygmograph : its history and use as an aid to diagnosis in ordinary practice / by R.E. Dudgeon.

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The sphygmograph : its history and use as an aid to diagnosis in ordinary practice / by R.E. Dudgeon. Public Domain Mark. Source: Wellcome Collection.

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