Biographical Memoirs Volume 73 (1998) / Chapter Skim
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LEWIS GIBSON LONGSWORTH
LEWIS GIBSON LONGSWORTH
Pages 306-321
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innovation of new experimental methods. Longsworth spent his whole career at the Rockefeller Institute, where MacInnes, ShecIlovsky, ant!
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by his high school physics teacher. Lewis attended Southwestern College in WinfielcI, where he came uncler the influence of Larry Oncley, head of the Chemistry Department en c!
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Longsworth and ShedIovsky were closely associated with MacInnes throughout nearly the entire period of his career at the Rockefeller Institute and Rockefeller University. Longsworth stayed at the Rockefeller Institute until he retired as a professor emeritus in 1970.
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to strong electrolytes, the electric forces within the moving boundary keeps it sharp, but when protein molecules move in buffer solutions the moving boundaries were easily clisrupted by convection. Tiselius's solution to this problem was to carry out the electrophoresis experiments at about 2°C, the temperature of maximum density of the buffer solution.
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that by willing a cliagonal slit in the focal plane of the schlieren lens en c! a cylincirical lens to focus the plane of the slit on the photographic plate, a plot of refractive inclex gradient versus height in the electrophoresis cell conic!
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for the quantitative interpretation of experiments in moving boundary electrophoresis and the improvement of equipment. Longsworth made major contributions both to theory en c!
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through by the various boundaries en c! the concentration changes across boundaries, subject only to constant relative ion mobilities.
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ELECTION TO THE NATIONAL ACADEMY OF SCIENCES Longsworth became a member of the National Academy of Sciences in 1947. In 1953 he was appointee!
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from moving boundary measurements with electric fielcis to measurements of diffusion constants in aqueous solutions. The reason for this was that it was becoming increasingly clear that moving boundary measurements in free solution for analyses of biochemical mixtures of both Tow en c!
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associates in the Enzyme Institute at the University of Wisconsin.5 6 Gosting had spent a year at the Rockefeller Institute in the MacInnes-Longsworth-ShecIlovsky group. Longsworth was a member of the American Chemical Society, Electrochemical Society, Harvey Society, en c!
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Renee D Mastrocco, archivist at the Rockefeller University, provided Lewis Longsworth's autobiographical sketch and other information.
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379-408. Washington, D.C.: National Academy Press, 1980.
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51 :1656-64. 1932 Transference numbers of aqueous solutions of potassium chloride, sodium chloride, lithium chloride and hydrochloric acid at 25°C by the moving boundary method.
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An electrophoretic study of the binding of salt ions by beta-lactoglobulin and bovine serum albumin.
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85-120. New York: Academic Press.
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