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Scottish pathologist and physiologist J(ames) Lorain Smith (1862-1931)

Smith discovered pulmonary toxicity of oxygen at increased partial pressure, the "Smith effect" (Smith JL. The pathological effects due to increase of oxygen tension in the air breathed. J Physiol 1899;24[1]:19-35). (Source: Proceedings of the Ulster Medical Association, 1904. Public domain. Image edited by Dr. Douglas J Lanska.)