A plain statement of authenticated facts respecting the system for the prevention and removal of disease / invented and practised by John St. John Long.

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A plain statement of authenticated facts respecting the system for the prevention and removal of disease / invented and practised by John St. John Long. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.