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Willis, Thomas

British physicians, leader of the English iatrochemists, who attempted to explain the workings of the body from current knowledge of chemical interactions; he is known for his careful studies of the nervous system and of various diseases. An Oxford professor of natural philosophy (1660-75), he opened a London practice in 1666 that became the most fashionable and profitable of the period

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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