Английская Википедия:Elias Allen

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Файл:Wenceslas Hollar - Elias Allen.jpg
A 1653 engraving of Elias Allen by Wenceslas Hollar

Elias Allen (c.1588 in Tonbridge – March 1653 in London) was an English maker of sundials and scientific instruments.Шаблон:Sfn

Allen was apprenticed to a London clockmaker in 1602 and, after his master died, established himself in a workshop beside St Clement Danes Church, the Strand.Шаблон:Sfn He made instruments for James I and Charles I, among others, and was associated with the mathematicians Edmund Gunter and William Oughtred.Шаблон:Sfn His apprentices included Ralph Greatorex.Шаблон:Sfn He served from 19 January 1637 until 29 July 1638 as Master of the London Clockmakers' Company.Шаблон:Sfn He died in March 1653 and was buried in St Clement Danes.Шаблон:Sfn

In 1638 William Oughtred wrote a letter to Allen asking him to make the earliest known Oughtred slide rule, and indicating that Oughtred himself had never made one. Oughtred writes, "I have here sent you directions (as you requested me being at Twickenham) about the making of the two rulers. [...] I would gladly see one of them when it is finished, which yet I never have done."[1] The instrument does not survive, but there is a reverse print of it.[2]

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  1. Шаблон:Cite book Шаблон:Pb Шаблон:Cite journal Шаблон:Pb The original letter, dated 20 August 1638, is in the Cambridge University archive, Item Reference Code: GBR/0012/MS Add.9597/13/5/215. "Enclosed is a 2 foot long impression of a copper plate (f.215b.) This has been photographed in two halves."
  2. Шаблон:Cite journal