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'''John Speidell''' ([[floruit|fl.]] 1600–1634) was an English mathematician. He is known for his early work on the calculation of logarithms.
{{AFC submission|d|bio|u=Jctobin8|ns=118|decliner=Worldbruce|declinets=20150328013934|ts=20150318202457}} <!-- Do not remove this line! -->


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Speidell was a mathematics teacher in London<ref name="AubreyClark1898">{{cite book|author1=John Aubrey|author2=Andrew Clark|title='Brief Lives': I-Y|url=https://archive.org/details/brieflives01clargoog|year=1898|publisher=At the Clarendon Press|pages=[https://archive.org/details/brieflives01clargoog/page/n258 230]–231}}</ref><ref name="DownesBold1993">{{cite book|author1=Kerry Downes|author2=John F. Bold|author3=Edward Chaney|author3-link=Edward Chaney|title=English Architecture Public & Private: Essays for Kerry Downes|url=https://books.google.com/books?id=0UCQl0ocbZMC&pg=PA28|year=1993|publisher=A&C Black|isbn=978-1-85285-095-1|pages=28–}}</ref> and one of the early followers of the work [[John Napier]] had previously done on [[natural logarithms]].<ref name="Hobson2012">{{cite book|author=E. W. Hobson|title=John Napier and the Invention of Logarithms, 1614: A Lecture by E.W. Hobson|url=https://books.google.com/books?id=YGa37Bay6NgC&pg=PA43|date=29 March 2012|publisher=Cambridge University Press|isbn=978-1-107-62450-4|pages=43–}}</ref> In 1619 Speidell published a table entitled "New Logarithmes" in which he calculated the natural logarithms of sines, tangents, and secants.<ref name="Hutton1785">{{cite book|author=Charles Hutton|title=Mathematical Tables, Containing Common, Hyperbolic and Logistic Logarithms, Also Sines Tangents, Secants and Versed Sines, Both Natural and Logarithmic|url=https://books.google.com/books?id=AhYPAAAAQAAJ&pg=PA30|year=1785|publisher=Robinson and Baldwin|pages=30–}}</ref><ref name="Cajori2013">{{cite book|author=Florian Cajori|title=A History of Mathematical Notations|url=https://books.google.com/books?id=_byqAAAAQBAJ&pg=RA1-PA157|date=26 September 2013|publisher=Courier Corporation|isbn=978-0-486-16116-7|pages=1–}}</ref>
{{AFC comment|1=The basic notability criteria for people is significant coverage in multiple independent, reliable, secondary sources. Cajori is a good source, but cannot on its own establish notability. Even if able to find additional similar independent sources, from what Cajori writes it's unlikely that a stand alone article on Speidell would be justified. He appears destined to be a footnote in history. [[User:Worldbruce|Worldbruce]] ([[User talk:Worldbruce|talk]]) 01:39, 28 March 2015 (UTC)}}


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He then diverged from Napier's methods in order to ensure all of the logarithms were positive.<ref name="Brewster1819">{{cite book|author=Sir David Brewster|title=Second American edition of the new Edinburgh encyclopædia|url=https://books.google.com/books?id=1W9UAAAAYAAJ&pg=PA112|year=1819|publisher=Published by Samuel Whiting and John L. Tiffany; also, by N. Whiting, New-Haven; A. Seward, Utica; S. Parker, Philadelphia; Wm. Snodgrass, Natchez; and I. Clizbe, New-Orleans 1819.|pages=112–}}</ref> A new edition of "New Logarithmes" was published in 1622 and contained an appendix with the natural logarithms of all numbers 1-1000.<ref name="Cajori1893">{{cite book|author=Florian Cajori|title=A History of Mathematics|url=https://archive.org/details/ahistorymathema00cajogoog|year=1893|publisher=Macmillan & Company|pages=[https://archive.org/details/ahistorymathema00cajogoog/page/n186 165]–}}</ref>
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Along with [[William Oughtred]] and [[Richard Norwood]], Speidell helped push toward the abbreviations of [[trigonometric functions]].<ref name="Cajori1893" />
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'''John Speidell''' (fl. 1600–1634) was an English mathematician. He is known for his early work on the calculation of logarythms.


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Speidel published a number of work about mathematics, including ''An Arithmeticall Extraction'' in 1628.<ref name="Morgan1847">{{cite book|author=Augustus De Morgan|title=Arithmetical Books from the Invention of Printing to the Present Time: Being Brief Notices of a Large Number of Works Drawn Up from Actual Inspection|url=https://books.google.com/books?id=YSUQAAAAYAAJ&pg=PA37|year=1847|publisher=Taylor and Walton|pages=37–}}</ref> His son, [[Euclid Speidell]], also published mathematics texts.<ref>{{cite journal |last1=Beeley |first1=Philip |title=Practical mathematicians and mathematical practice in later seventeenth-century London |journal=The British Journal for the History of Science |date=June 2019 |volume=52 |issue=2 |pages=225–248 |doi=10.1017/S0007087419000207|pmid=31198123 |doi-access= }}</ref>
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Speidell was a mathematics teacher in London<ref name="AubreyClark1898">{{cite book|author1=John Aubrey|author2=Andrew Clark|title='Brief Lives': I-Y|url=http://books.google.com/books?id=l4dmAAAAMAAJ|year=1898|publisher=At the Clarendon Press|pages=230–231}}</ref><ref name="DownesBold1993">{{cite book|author1=Kerry Downes|author2=John F. Bold|author3=Edward Chaney|title=English Architecture Public & Private: Essays for Kerry Downes|url=http://books.google.com/books?id=0UCQl0ocbZMC&pg=PA28|year=1993|publisher=A&C Black|isbn=978-1-85285-095-1|pages=28–}}</ref> and one of the early followers of the work [[John Napier]] had previously done on [[natural logarithms]].<ref name="Hobson2012">{{cite book|author=E. W. Hobson|title=John Napier and the Invention of Logarithms, 1614: A Lecture by E.W. Hobson|url=http://books.google.com/books?id=YGa37Bay6NgC&pg=PA43|date=29 March 2012|publisher=Cambridge University Press|isbn=978-1-107-62450-4|pages=43–}}</ref> In 1619 Speidell published a table entitled "New Logarithmes" in which he calculated the natural logarithms of sines, tangents, and secants.<ref name="Hutton1785">{{cite book|author=Charles Hutton|title=Mathematical Tables, Containing Common, Hyperbolic and Logistic Logarithms, Also Sines Tangents, Secants and Versed Sines, Both Natural and Logarithmic|url=http://books.google.com/books?id=AhYPAAAAQAAJ&pg=PA30|year=1785|publisher=Robinson and Baldwin|pages=30–}}</ref><ref name="Cajori2013">{{cite book|author=Florian Cajori|title=A History of Mathematical Notations|url=http://books.google.com/books?id=_byqAAAAQBAJ&pg=RA1-PA157|date=26 September 2013|publisher=Courier Corporation|isbn=978-0-486-16116-7|pages=1–}}</ref>


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== References ==
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He then diverged from Napier's methods in order to ensure all of the logarithms were positive.<ref name="Brewster1819">{{cite book|author=Sir David Brewster|title=Second American edition of the new Edinburgh encyclopædia|url=http://books.google.com/books?id=1W9UAAAAYAAJ&pg=PA112|year=1819|publisher=Published by Samuel Whiting and John L. Tiffany; also, by N. Whiting, New-Haven; A. Seward, Utica; S. Parker, Philadelphia; Wm. Snodgrass, Natchez; and I. Clizbe, New-Orleans 1819.|pages=112–}}</ref> A new edition of "New Logarithmes" was published in 1622 and contained an appendix with the natural logarithms of all numbers 1-1000.<ref name="Cajori1893">{{cite book|author=Florian Cajori|title=A History of Mathematics|url=http://books.google.com/books?id=bfgRxVzjbMYC&pg=PA165|year=1893|publisher=Macmillan & Company|pages=165–}}</ref>
{{Reflist}}


{{Authority control}}
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Along with [[William Oughtred]] and [[Richard Norwood]], Speidell helped push toward the abbreviations of [[trigonometric functions]].<ref name="Cajori1893" />


{{DEFAULTSORT:Speidell, John}}
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Speidel published a number of work abou mathematics, including ''An Arithmeticall Extraction'' in 1628.<ref name="Morgan1847">{{cite book|author=Augustus De Morgan|title=Arithmetical Books from the Invention of Printing to the Present Time: Being Brief Notices of a Large Number of Works Drawn Up from Actual Inspection|url=http://books.google.com/books?id=YSUQAAAAYAAJ&pg=PA37|year=1847|publisher=Taylor and Walton|pages=37–}}</ref>
[[Category:16th-century births]]

[[Category:17th-century deaths]]
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== References ==
[[Category:17th-century English mathematicians]]
{{reflist}}

Latest revision as of 03:09, 19 August 2023

John Speidell (fl. 1600–1634) was an English mathematician. He is known for his early work on the calculation of logarithms.

Speidell was a mathematics teacher in London[1][2] and one of the early followers of the work John Napier had previously done on natural logarithms.[3] In 1619 Speidell published a table entitled "New Logarithmes" in which he calculated the natural logarithms of sines, tangents, and secants.[4][5]

He then diverged from Napier's methods in order to ensure all of the logarithms were positive.[6] A new edition of "New Logarithmes" was published in 1622 and contained an appendix with the natural logarithms of all numbers 1-1000.[7]

Along with William Oughtred and Richard Norwood, Speidell helped push toward the abbreviations of trigonometric functions.[7]

Speidel published a number of work about mathematics, including An Arithmeticall Extraction in 1628.[8] His son, Euclid Speidell, also published mathematics texts.[9]

References

[edit]
  1. ^ John Aubrey; Andrew Clark (1898). 'Brief Lives': I-Y. At the Clarendon Press. pp. 230–231.
  2. ^ Kerry Downes; John F. Bold; Edward Chaney (1993). English Architecture Public & Private: Essays for Kerry Downes. A&C Black. pp. 28–. ISBN 978-1-85285-095-1.
  3. ^ E. W. Hobson (29 March 2012). John Napier and the Invention of Logarithms, 1614: A Lecture by E.W. Hobson. Cambridge University Press. pp. 43–. ISBN 978-1-107-62450-4.
  4. ^ Charles Hutton (1785). Mathematical Tables, Containing Common, Hyperbolic and Logistic Logarithms, Also Sines Tangents, Secants and Versed Sines, Both Natural and Logarithmic. Robinson and Baldwin. pp. 30–.
  5. ^ Florian Cajori (26 September 2013). A History of Mathematical Notations. Courier Corporation. pp. 1–. ISBN 978-0-486-16116-7.
  6. ^ Sir David Brewster (1819). Second American edition of the new Edinburgh encyclopædia. Published by Samuel Whiting and John L. Tiffany; also, by N. Whiting, New-Haven; A. Seward, Utica; S. Parker, Philadelphia; Wm. Snodgrass, Natchez; and I. Clizbe, New-Orleans 1819. pp. 112–.
  7. ^ a b Florian Cajori (1893). A History of Mathematics. Macmillan & Company. pp. 165–.
  8. ^ Augustus De Morgan (1847). Arithmetical Books from the Invention of Printing to the Present Time: Being Brief Notices of a Large Number of Works Drawn Up from Actual Inspection. Taylor and Walton. pp. 37–.
  9. ^ Beeley, Philip (June 2019). "Practical mathematicians and mathematical practice in later seventeenth-century London". The British Journal for the History of Science. 52 (2): 225–248. doi:10.1017/S0007087419000207. PMID 31198123.
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