Person Hewitt; John Theodore (1868 - 1954); chemist Hewitt John Theodore chemist 1868 - 1954 British Male Windsor, Berkshire, England 12 October 1868 18681012 09/07/1954 19540709

chemist Analytical chemistry Organic chemistry Chemistry Education: St John's College, Cambridge Career: Performed demonstrations in Cambridge in combination with his research on hydrazines (1891); went to Heidelberg (1892); worked at the Hartley Institute Laboratory at Southampton where he discovered the first of the arylazophenol hemihydrates (1893); Professor at the People’s Palace Technical Schools (1894); Professor at East London College (1915); began working with spirits in a distillery, gaining a reputation as an expert; worked out methods of making acetic anhydride, which was not manufactured in Great Britain (1914-1915); received a commission as ‘Major, General List, attached Royal Engineers’; carried out a large number of water analyses and advised on a cargo of chlorine cylinders; sent home and after short leave seconded to the Department of Explosives Supply (Ministry of Munitions), under Lord Moulton (1916); resigned his professorships (1919). Parents: John Hewitt (1840-1874) and Alice Mary Hewitt (nee Pasmore). Contributed to analytical chemistry. Studied nitration of hydroxyazo compounds. Investigated bromination benzeneazophenol in acetic acid; bromination of an o-hydroxyazo compound; bromination of benzeneazo-a-naphthol in glacial acetic acid in presence of sodium acetate. Theorised to account for the fluorescence of certain compounds. Observed the interaction of dichlorophenylphenazonium nitrate and arylamines. Took an interest in Nitrophenols. Fellow 05/05/1910 42 Henry John Horstman Fenton; William Palmer Wynne; Horace Tabberer Brown; Charles Herbert Lees; Thomas Henry Tizard Henry Edward Armstrong; George Downing Liveing; William Augustus Tilden; William Henry Perkin; Raphael Meldola; William Ramsay; Martin Onslow Forster Sources: Bulloch's Roll Obituaries: Biographical Memoirs of Fellows of the Royal Society 1955 vol 1 pp 79-99, plate, by E E Turner International Standard Archival Authority Record for Corporate Bodies, Persons and Families - ISAAR(CPF) - Ottawa 1996 ISBN 0-9696035-3-3 National Council on Archives, Rules for the Construction of Personal, Place and Corporate Names, 1997 https://royalsocietypublishing.org/doi/10.1098/rsbm.1955.0007 12 Oct 1868 - 9 Jul 1954 The past Fellows entries are under continuous revision. If you have queries or additional information to contribute, please contact Library@royalsociety.org. Content in external sources is not controlled by the Royal Society and historical sources may include content that is now unacceptable. Reviewed on 24/04/2024 as part of the Name Authority Project update. NA1766 21/11/2001 Andyg Pmab 08/09/2025 RS_NET\VirginiaM Yes 2683cfac-a2d1-4c95-8a0f-cd0685830eae