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John William Nicholson : ウィキペディア英語版 | John William Nicholson John William Nicholson, FRS〔 (1 November 1881 – 3 October 1955) was an English mathematician. ==Career== Based on the results of astronomical spectroscopy of nebula he proposed in 1911 the existence of several yet undiscovered elements. Coronium with an atomic weight of 0.51282, nebulium with a weight of 1.6281 and protofluorine with a weight of 2.361. Ira Sprague Bowen was able to attribute the spectroscopical lines of nebulium to doubly ionized oxygen making the new elements obsolete for their explanation.
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