EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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William Hartree (1870-1943), British engineer. William Hartree, a lecturer in engineering at Cambridge University, was the father of British mathematician and physicist Douglas Hartree (1897-1958). Here, William Hartree is dissecting a frog muscle in the Cambridge Physiological Laboratory. The cylindrical (spiral) slide rule at left is for high-precision calculations. Hartree, who was retired from his engineering work, was carrying out this work with British physiologist Archibald Hill (1886-1977), with whom he had published many papers on muscle physiology. Photographed in the late 1930s.
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