.jpg?w=1)
Details
MOSELEY, Henry Gwyn Jeffreys (1887-1915). "The High-Frequency Spectra of the Elements." - "The High-Frequency Spectra of the Elements. Part II." In: The London, Edinburgh, and Dublin Philosophical Magazine. Sixth series, vol.26, no.156 (December 1913), pp.1024-1034; and Sixth series, vol.27, no.160 (April 1914), pp.703-713. London: Taylor and Francis, 1913-1914.
2 volumes, 8o. One plate in vol.26. Original blue printed wrappers (some light wear along edges of wrappers); cloth folding case.
FIRST EDITION of Moseley's breakthrough work which placed the atomic table on a firm scientific foundation. "Moseley, working under Rutherford at Manchester, used the method of X-ray spectroscopy devised by the Braggs to calculate variations in the wavelength of the rays emitted by each element. These he was able to arrange in a series according to the nuclear charge of each element... These figures Moseley called atomic numbers. He pointed out that they also represented a corresponding increase in extra-nuclear electrons and that it is the number and arrangement of these electrons rather than the atomic weight that determines the properties of an element. It was now possible to base the periodic table on a firm foundation, and to state with confidence that the number of elements up to uranium is limited to 92" (PMM 407). Norman 1559. (2)
2 volumes, 8o. One plate in vol.26. Original blue printed wrappers (some light wear along edges of wrappers); cloth folding case.
FIRST EDITION of Moseley's breakthrough work which placed the atomic table on a firm scientific foundation. "Moseley, working under Rutherford at Manchester, used the method of X-ray spectroscopy devised by the Braggs to calculate variations in the wavelength of the rays emitted by each element. These he was able to arrange in a series according to the nuclear charge of each element... These figures Moseley called atomic numbers. He pointed out that they also represented a corresponding increase in extra-nuclear electrons and that it is the number and arrangement of these electrons rather than the atomic weight that determines the properties of an element. It was now possible to base the periodic table on a firm foundation, and to state with confidence that the number of elements up to uranium is limited to 92" (PMM 407). Norman 1559. (2)