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Credit
Handbuch der pneumatischen Therapie : fur praktische Aerzte und Studirende der Medicin : mit einem Anhang: Das Pneumatometer, der Stethograph, der Anapnograph, das Thorakometer, etc. / von Theodor Knauthe. 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.