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H. Stanley Allen
Herbert Stanley Allen (December 29, 1873 - April 27, 1954) was a pioneer in early X-ray research, working under J. J. Thomson at the University of London and alongside Nobel laureate Charles Glover Barkla at the University of Edinburgh. A supporter of the Parson magneton, Allen was also an early contributor to the field of quantum mechanics.
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As an undergraduate at Trinity College, Cambridge, Allen shared Whewell’s Court with fellow pupil Edmund Whittaker, earning his Mathematics B.A. there in 1896. After working at Cavendish Laboratory, Allen returned to Cambridge in 1898 to conduct research under J. J. Thomson on the motion of spheres through viscous fluids, useful in the determination of the elementary unit of charge. In 1900 he moved to Renfrew, where he researched spectral photography, the Zeeman effect, and radioactivity under Lord Blythwood. He was appointed lecturer in 1905 at King's College, University of London, where he obtained a D.Sc. in 1909 for his work on the discharge of electricity through gases. He conducted this work under Harold A. Wilson and contemporary Charles Glover Barkla, whom he followed to the University of Edinburgh in 1919.
Allen’s 1913 book, "Photo-electricity", was an early contribution to the study of radiation, focusing on his earlier work in photoelectric fatigue. Beginning in 1919, he contributed a series of articles favoring a modified version of the Parson magneton, a physical model for the electron originally proposed in 1915   Quantum theory was then in its infancy and Allen’s contributions were among the earliest to the subject.   
Fellow academic Sir D’Arcy Thompson said of him, “Perhaps he does not realize how strongly he has endeared himself to his colleagues and his students by his own personality, his faith and vision…” Allen died April 27, 1954 at the home of his daughter in Balblair, Ross-shire, Scotland.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "H._Stanley_Allen". A list of authors is available in Wikipedia.|