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Credit
Air and its relations to life : being, with some additions, the substance of a course of lectures delivered in the summer of 1874 at the Royal Institution of Great Britain / by Walter Noel Hartley. Public Domain Mark. Source: Wellcome Collection.
Provider
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.