Diss. (sammanfattning) Umeå : Sveriges lantbruksuniv., 2001. / Härtill 6 uppsatser.

Thesis (Ph. D.)--Johns Hopkins University, 1917. / Biographical note. Reprinted from Astrophysical journal vol. XLVI, no. 5.

Thesis--Wisconsin. / Includes bibliographical references (leaves 133-137).

Thesis (M.D.)--University of Maryland. / "Submitted to the consideration of the Honourable Robert Smith, provost, and of the regents of the University of Maryland" Microform version available in the Readex Early American Imprints series.

Thesis (M.D.)--College of Physicians and Surgeons in the city of New York, 1811. / Microform version available in the Readex Early American Imprints series.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1976. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 136-137).

Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 139-152).

The hyperfine structure of mercury extracted from neutron irradiated gold has been investigated with the aid of a Fabry-Perot etalon. The theory and design of the interferometer are discussed in detail. The wavelengths of sixteen lines in the spectrum of Hg¹⁹⁸, and the hyperfine structure of many lines in the spectrum of Hg¹⁹⁹ have been evaluated and compared with former determinations, The ratio of Hg¹⁹⁹ to Hg¹⁹⁸ produced during the neutron bombardment of gold has been determined from intensity measurements of the hyperfine structure patterns. The result yields a value of (1.78± 0.10) X 10⁴ barns for the neutron capture cross section of Au¹⁹⁸ . / Science, Faculty of / Physics and Astronomy, Department of / Graduate

An apparatus for determination of vapour pressures of metals in the pressure range 5 x 10⁻³ to 10² mm. Hg. by the streaming or transpiration method is described. The carrier gas is circulated, and purified, in a closed system. Saturation is achieved by condensing out an excess of the metallic vapour. Very large condensing surface and increased flow are used, with provision for checking the effects of flow, initial quantity of metallic vapour, total pressure and temperature gradients. The quantity of metal carried over is determined by titration. Results of measurements of the vapour pressure of mercury from 5 x 10⁻³ mm. to 60 mm. (30°C. to 240°C.) are given. Low temperature values are significantly above previous determinations, but are in complete agreement with the vapour pressure formula proposed by Ditchbum and Gilmour in 1941. log p. = 10.3735 – 3308/T = 0.8 log T Values given by the International Critical Tables are shown to be inaccurate below 140°C. and equations based on free energy calculations are shown to be inconsistent and unsuitable for extrapolation to low pressures. The Ditchburn and Gilmour formula is recommended for all temperatures between 140°C. and -38°C. (the freezing point). The error at the lower temperature is probably less than 4%. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

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