Biographical Memoirs Volume 62 (1993) / Chapter Skim
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Pages 225-238
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chemistry, involving service as a member of the Council of the National Academy of Sciences (1949-52) , dean of men and dean of the College of Letters and Science at the University of California, and member of the Citizens Advisory Committee on Education to the California Legislature.
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226 BIOGRAPHICAL MEMOIRS ity to young people was immediately apparent. Although I clid not do my thesis research with him, ~ clicI consult him frequently and the discussion was always helpful.
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. The color of iodine solutions fascinated Hildebranc!
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by several scientists, but these suffered either from the absence of relationships to the properties of the pure components or, in van Laar's case, to making these connections through an approximate equation of state. While the van der Waals equation was a great advance at the time and it gives a reasonable representation of gas imperfection, the quantitative deviations in the liquid region are large, and it is the liquid region that is pertinent to liquid solutions.
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Joel's effort to improve the theory of regular solutions continued with a final paper in 1979. Hildebrand, always the effective teacher, summarized the current status of knowledge about nonelectrolyte solutions In monographs designed to interest and instruct chemists.
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230 BIOGRAPHICAL MEMOIRS The relationship of the color of iodine solutions to their other characteristics was notecI. Joel maintained a continuing interest in the changes of color (or new spectral features)
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JOEL HENRY HILDEBRAND 23 oxygen for the diver's breathing gas. Not only is the solubility of helium much less than that of nitrogen at a given pressure, but also the diffusion rate is faster.
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232 BIOGRAPHICAL MEMOIRS not enough hydrophilic to pry apart the hydrogen bonds of water so that the alkanes can go into solution without assistance from attached polar groups." In the period 1970-77 Joel gave considerable attention to the viscosity of liquids or, as he prefered, the fluidity that is the reciprocal of viscosity. These papers are collected in a small monograph, Viscosity and Diffusivity: A Predictive Treatment, published in 1977 with an introduction by I
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J O E L H E N RY H I L D E B RAN D 233 Latimer (both members of the Academy) took primary responsibility for the laboratory and wrote the book for it.
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His former students, now in a multitucle of positions of responsibility and influence, urged his inclusion on committees, boards, and conferences. A notable example was the Citizens Advisory Committee to the Joint Education Committee of the California legislature.
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JOEL HENRY HILDEBRAND 235 Thus, Joel accepted appointments and served a few years in each case as dean of men (1923-26) , dean of the College of Letters and Science (1939-43)
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Hilclebrand received the Willard Gibbs Medal, his son Roger was invited to help introduce him. The result was a most amusing ant!
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TOEL HENRY HILDEBRAND 237 was fanned by a powerful hand. As a result, enough bonfires lit the sky to reduce any mother but mine to a cinder." Another paragraph from Roger's introduction: 'We learned a lot by watching him.
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The more important honors are listed elsewhere, so ~ will comment only briefly. From the American Chemical Society came the award of the Nichols Medal in 1939; its teaching award in 1952; the Willard Gibbs Medal in 1953; and its highest recognition, the Priestley Mecial, in 1962.
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