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Credit
A critical and experimental essay on the circulation of the blood : especially as observed in the minute and capillary vessels of the batrachia and of fishes / by Marshall Hall. 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.