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Credit
Physiologische Betrachtungen über den Unterschied der Pflanze, des Thieres und des Menschen hinsichtlich des Instincts, des Sinnes und der Intelligenz / von J.D. Herholdt. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.