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The constitution of the solar corona pts 1-2 (of 3) plus 3 other offprints. Von Karman copies

Nicholson, John W.

Publication Date: 1912
Soft cover
From Jeremy Norman's historyofscience (Novato, CA, U.S.A.)

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Nicholson, John William (1881-1955). (1) The constitution of the solar corona. I. Protofluorine. Offprint from Monthly Notices of the Roy. Astr. Soc. 72, no. 2 (Dec. 1911). 139-150pp. (2) The constitution of the solar corona. II. Offprint from ibid., no. 8 (June 1912). [2], 677-692pp. (3) The constitution of the ring nebula in Lyra (N. G. C. 6720). Offprint from ibid., no. 3 (Jan. 1912). [1], 176-177pp. (4) On the new nebular line at l4353. Offprint from ibid., no. 8 (June 1912). 1 page. (5) A structural theory of the chemical elements. Offprint from Phil. Mag. (Dec. 1911). 864-889pp. Together 5 offprints. 221 x 142 mm. Original printed wrappers except for no. 4, which is unbound as issued. Wrappers of no. 5 detached, light browning, but very good. From the library of Theodore von Karman (1881-1963), with his characteristic docketing on the front wrappers. First Separate Editions. Nicholson is best known for his atomic theory of coronal and nebular spectra, which he announced in a series of papers published in the Monthly Notices of the Roy. Astr. Soc. beginning in November 1911. "The spectra of the solar coronal and galactic nebulae contained lines of unknown origin, which Nicholson, following a common astrophysical speculation at the time, supposed were produced by elements that were primary in an evolutionary sense to terrestrial elements. . . . Adapting an atomic model of J. J. Thomson, Nicholson viewed an atom of a primary element as a single, planetary ring of electrons rotating about a small, massive, positively charged nucleus. Associating the frequencies of the unidentified spectral lines with those of the transverse modes of oscillation of the electrons about their equilibrium path, he accounted for most coronal and nebular lines with impressive numerical accuracy, even predicting a new nebular line that was soon discovered" (DSB). The discovery of this new nebular line is mentioned in nos. 2 and 4. In the second and third parts of his paper on "The constitution of the solar corona" (third part not present here), Nicholson introduced Planck's quantum constant h as a means of fully specifying the theory of his atomic systems. Nicholson's atomic theory had an important influence on Niels Bohr at a time when Bohr was working out his own theory of the atom: "Impressed by the unprecedented spectral capacity of Nicholson's theory, Bohr sought its relation to his own theory. In so doing Bohr came to a deeper understanding of his own atomic model, in particular of his need to attribute excited states to it" (DSB). These copies of Nicholson's papers are from the library of Theodore von Karman, founder of Cal Tech's Jet Propulsion Laboratories. Karman emigrated to the United States in the late 1920s, where he joined the faculty of the California Institute of Technology as director of the Guggenheim Aeronautical Laboratory; his contributions to fluid dynamics helped to lay the scientific foundation of aviation and space exploration. Bookseller Inventory # 38740

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Title: The constitution of the solar corona pts 1-2...

Publication Date: 1912

Binding: Soft cover

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