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Scottish toxicologist and physician Sir Robert Christison, 1st Baronet (1797-1882)

Sir Robert Christison became an authority on poisons, and his treatise on them was published in 1829. In the course of his research he undertook experiments on himself, such as taking large doses of Calabar bean (physostigmine). (Source: Wellcome Institution, London, UK. Creative Commons Attribution 4.0 International [CC BY 4.0] license,