John Theodore Hewitt

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John Theodore Hewitt (born October 12, 1868 in Windsor , † July 9, 1954 in Hurst ) was a British chemist.

Hewitt was the son of a coach builder and a teacher. He had chemistry lessons in Southampton and after winning a scholarship from Percy Faraday Frankland in London in 1884 and from Thomas Edward Thorpe and Francis Japp at the Normal School of Science in London. From 1887 he studied natural sciences and especially chemistry at Cambridge University, graduating in 1890. Siegfried Ruhemann (1859-1943) was one of his teachers there . He then continued his studies in Berlin (at Ferdinand Tiemann continued) and Heidelberg and was in Heidelberg in 1893 Ludwig Gattermann doctorate . Also in 1893 he received a D.Sc. of the University of London. In 1894 he became a chemistry professor at the People's Palace Technical School, which was part of the University of London from 1915. In 1919 he gave up and founded the SHM chemical factory in Heston (Middlesex) with others . After this was dissolved in 1924, he worked in an advisory capacity. He died when he was run over by a car.

From 1907 to 1910 he published five articles (Journal of the Chemical Society Transactions) on the relationship between color and constitution of azo dyes , the color of which he traced back to the quinoid structure it contained .

He was a Fellow of the Royal Society .

Fonts

  • Elementary Practical Chemistry; Inorganic And Organic, Whittaker 1895, Archives
  • Organic chemical manipulation, Whittaker 1897, Archives
  • Synthetic coloring matters; Dyestuffs Derived from Pyridine, Quinoline, Acridine and Xanthene, Longmans, Green and Co., 1922, Archives

literature

  • Pötsch: John Theodore Hewitt in: Winfried R. Pötsch (lead), Annelore Fischer, Wolfgang Müller: Lexicon of important chemists , Harri Deutsch 1989, p. 202
  • EE Turner, obituary in J. Chem. Soc. 1955, pp. 4493-4496, first page

Individual evidence

  1. ↑ Life data, publications and academic family tree of John Theodore Hewitt at academictree.org, accessed on February 10, 2018.
personal data
SURNAME Hewitt, John Theodore
BRIEF DESCRIPTION British chemist
DATE OF BIRTH October 12, 1868
PLACE OF BIRTH Windsor (Berkshire)
DATE OF DEATH July 9, 1954
Place of death Hurst (Berkshire)