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William Gregory (1803-58), Scottish physician and chemist. Gregory was born at Edinburgh and was educated there, graduating as a physician. He soon turned his mind to chemistry and studied under Liebig at Giessen. He made advances in the chemistry of opiates, producing Gregory's Salt, a mixture of the hydrochlorides of morphine and codeine. He was instrumental in publicising Liebig's works by translating and editing them as well as maintaining his own work in organic chemistry. In later life he devoted himself to the study of diatoms.
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