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Credit
On the action of carbolic acid, atropia and convallaria on the heart : with some observations on the influence of oxygenated and non-oxygenated blood, and of blood in various degrees of dilution / by H.G. Beyer. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.