Biographical Memoirs Volume 44 (1974) / Chapter Skim
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9. Rudolf Ruedemann
9. Rudolf Ruedemann
Pages 292-308
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Ibid., 72: 165-201, 1910. Extended investigations of precise values of atomic weights; and a study of volume and energy relative to material in relation to the new hypothesis of compressible atoms.
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The transition temperatures of sodium chromate as convenient fixed points in thermometry.
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Rowe. An improved method for determining specific heats of liquids, with data concerning dilute hydrochloric, hydrobromic, hydriodic, nitric, and perchloric acids and lithium, sodium, and potassium hydroxides.
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Coombs. Surface tensions of water, methyl, ethyl, and isobutyl alcohols, ethyl butyrate, benzene and toluene.
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Concentrated thallium amalgams: their electrochemical and thermochemical behavior, densities and freezing points.
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Rowe. An indirect method of determining the specific heat of dilute solutions, with preliminary data concerning hydrochloric acid.
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Smyth. Solid thallium amalgams and the electrode potential of pure thallium.
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Gucker, [r. An improved differential method for the exact determination of specific heats of aqueous solutions; including results for various salts and organic acids.
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The heats of dilution and specific heats of barium and calcium chloride solutions.
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Very soon after his arrival, he obtained a position teaching science in the high school at Lowville, New York; a year later he moved to a similar position at Dolgeville, New York. It was in the years at Dolgeville that he took up the study of fossil graptolites (a fairly large class of extinct animals incertoe sedisJ, 287
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In his earlier vears at Albany, he specialized in the Ordovician graptolites of eastern New York State, and soon he showed that they could be readily zoned and that the black shale facies in which they mainly occur represents a far longer time span than had been realized. In particular, by 1912 he had used his findings to demonstrate a major lateral facies change from limestone eastward through black shale into graywacke (we would now say flysch)
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One of these (in the 1930s) was a detailed study of the other fossils associated with the graptolites, which he showed to represent not a benthonic but a planktonic fauna, and he further concluded that the graptolitic black shale and associated strata were deposited in large part in deep water; this idea was not well received at the time, but the recognition of the role of turbidity currents in the deeper ocean about 1950 showed that Ruedemann had been quite right.
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Winifred Goldring, his successor as State Paleontologist of New York, summed up his life as follows: "There were just two important interests in Doctor Ruedemann's life, his scientific work and his family. He often remarked that he judged all women by comparison with his wife; and he relied greatly upon her good sense and jud'~rnent, realizing that she was more practical than he.
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Bull. University of Texas Bulletin 1887 Die Contacterscheinungen am Granit der Reuth bei Gefrees.
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Catalogue of type specimens of Paleozoic fossils in the New York State Museum.
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