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Credit
On the colour-tests for strychnia, and the diagnosis of the alkaloids : being the substance of part of the Croonian lectures for 1861, delivered at the Royal College of Physicians / by William A. Guy. 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.