IN 1889, AT A MEETING OF THE SOCIETE de Biologie of Paris, a physiologist named Charles-Edouard Brown-Sequard described the results of an experiment he had recently performed on himself. He had painstakingly mixed an elixir of blood, semen, water, and "juice extracted from a testicle, crushed immediately after it has been taken from a dog or a guinea-pig," and then injected the fluid into his arms or legs 10 times over a three-week period. His goal, he told the audience, was to see if he could reverse some of "the most troublesome miseries of advanced life."
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