1. The Galileo Project The information here was compiled by the late Richard S. Westfall, Professor in the Department of History and Philosophy of Science at Indiana http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

2. Delamain Biography of Richard Delamain (16001644) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

3. References For Delamain References for the biography of Richard Delamain http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

4. William Oughtred The most well known pupils of his are John Wallis, Christopher Wren and Richard Delamain. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

5. All-Info About English Culture - William Oughtred (1575-1660) in his home rentfree while studying mathematics - some of his more famous pupils included Christopher Wren, Richard Delamain and John Wallis. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

6. Biography Of Delamain, Richard Biography of Delamain, Richard http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

7. Lebensdaten Von Mathematikern Faille, Charles (1597 1652) de Lagny, Thomas (1660 - 1734) de La Hire, Philippe (1640 - 1718) Delamain, Richard (1600 - 1644) Delambre, Jean http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. This Is A Presentation Of 255 D Daniell, John Frederic, 109 Davy, Sir Humphrey, 6566 DeForest, Lee, 223 Dehomag, 137 Delamain, Richard, 29 De Morgan, Augustus, 31 http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

9. Websters Instrument Makers Database - Letter D Amsterdam. Rooseboom 1; M rzer Bruyns 1 2; Michel 3. DAME, RICHARD USA, c.1840, MIM made rulers. Hanover, N.H. DATM. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

10. Neue Seite 1 de La Hire, Philippe (1640 1718) Delamain, Richard (1600 - 1644) Delambre, Jean Baptiste Joseph (19.9.1749 - 19.8.1822) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. Delamain Biography of richard delamain (16001644) richard delamain was a joiner bytrade. He studied mathematics at Gresham College London. http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Delamain.html

Richard Delamain Born: 1600 in London, England Died: Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Version for printing Richard Delamain was a joiner by trade. He studied mathematics at Gresham College London. After this he remained in London becoming a private tutor of mathematics. Delamain became mathematics tutor to Charles I, who was king of Great Britain and Ireland (1625-49). Delamain was the same age as the king he tutored, both being born in 1600. He received 40 per year in this position. Delamain became a student of Oughtred and they were great friends at first. Oughtred wrote As I did to Delamain, and to some others ... I freely gave ... my helpe and instruction. ... But Delamain was already corrupted with doring upon instruments, and quite lost from ever being made an artist. They had a bitter dispute over the invention of a circular slide rule. Oughtred described the slide rule in 1622 but the circular slide rule was not described by him until 1632. Delamain described a circular slide rule in a 32 page pamphlet Grammelogia which was sent to the King in 1629 and published the following year. His fame as a mathematician rests on this work.

12. References For Delamain References for the biography of richard delamain. AJ Turner, William Oughtred,richard delamain and the Horizontal Instrument in 17thCentury England, http://www-groups.dcs.st-and.ac.uk/~history/References/Delamain.html

References for Richard Delamain Version for printing Biography in Dictionary of Scientific Biography (New York 1970-1990). Books: F Cajori, William Oughtred. A great Seventeenth Century Teacher of Mathematics (London-Chicago, 1916). Articles: Richard Delamain, Dictionary of National Biography (London, 1949-50), 751. A J Turner, William Oughtred, Richard Delamain and the Horizontal Instrument in 17th-Century England, Annali dell'Istituto e Museo di Storia della Scienza di Firenze Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR December 1996 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/References/Delamain.html

13. Science And Society Picture Library - Search There are no released images found for the Keyword delamain, AND richard Delagrave, Charles Delahaye delamain delamain, richard Delamarche, CF http://www.scienceandsociety.co.uk/results.asp?txtkeys1=Delamain, Richard

14. Science And Society Picture Library - Search There are no released images found for the Keyword delamain Delagrange, Leon Delagrave, Charles Delahaye delamain delamain, richard http://www.scienceandsociety.co.uk/results.asp?txtkeys1=Delamain

15. Smart Computing Encyclopedia Entry - Richard Delamain Smart Computing Encyclopedia Entry richard delamain. http://www.smartcomputing.com/editorial/dictionary/detail.asp?guid=&searchtype=1

16. Smart Computing Article - Who’s Who In Computing delamain, richard (16001644) Student of William Oughtred who, in 1630, When one of his students, richard delamain, published the invention as his own, http://www.smartcomputing.com/editorial/article.asp?article=articles/archive/r03

17. Roger Gaskell Rare Books The dispute with delamain. richard delamain was the first to publish an Ibid, 6 (1974), 158–66; AJ Turner, ‘William Oughtred, richard delamain and the http://www.rogergaskell.com/catdocs/15048.htm

images OUGHTRED, William (1575–1660).. The circles of proportion and the horizontal instrument London printed by Augustine Mathewes, and are to bee sold by Nic: Bourne at the Royall Exchange Collation: Circles : A (–A1 +/–A2) B–X (+/–X4), 83 leaves, pp. [6] 152 [8]; [’An addition’]: A (–A1) B (+/–B4) C–H , 31 leaves, pp. 62; ‘To the English gentrie’: A–D , 16 leaves, pp. [32]. Errata to first work on X4v, errata slip for last work pasted to the foot of D4v. Woodcut headpieces and initials, full page woodcuts on S2r and X1r and 10 half-page woodcuts on the following 3 leaves, other small woodcut diagrams in the text, woodcuts on D2r and E4r of second work. Plates: 3 engraved plates, inserted facing B1r, Q1r and S2r (folded in at the fore edge). Condition 174 x 125mm. Fore edge of first plate defective with some loss of engraved surface, hole in the inner margin of A2 of second part affecting a few letters, margins of first and last few leaves strengthened with tissue, some browning and soiling throughout. Binding: Contemporary blind ruled unlettered sheep. Rebacked with the original spine laid down, corners repaired, boards worn and chipped.

18. The Invention Of The Slide Rule richard delamain, a teacher of mathematics, was originally William Oughtred s 3 AJ Turner William Oughtred, richard delamain and the Horizontal http://web.mat.bham.ac.uk/C.J.Sangwin/Sliderules/inventrule.html

The invention of the Slide Rule Edmund Gunter (15811626) Edmund Gunter's most important book entitled Description and use of the Sector , was first published in English in 1623. This has been described as ``the most important work on the science of navigation to be published in the seventeenth century." A sector is a mathematical instrument consisting of two hinged arms on which there are engraved scales which can be used to help with calculations. This is not a slide-rule; the single scale is used in conjunction with a pair of compasses. What makes Gunter's sector special is that it is the first mathematical instrument to be inscribed with a logarithmic scale to help solve numerical problems. In practice the points of the compass tend to damage the scales which reduces the accuracy of the instrument. William Oughtred (15741660) William Oughtred was a clergyman and keen mathematician. He is believed to have introduced the x symbol for multiplication in his book Clavis Mathematicae (Key to Mathematics), written about 1628 and published in London in 1631. This was a very important maths text book at the time. Newton read and was influenced by it for example. He is now generally though to be the inventer of the slide rule. Both straight and circular rules are described in a book with the title

19. Online Text Of William Oughtred's Circles Of Proportion 1 AJ Turner William Oughtred, richard delamain and the Horizontal Instrumentin the Seventeenth Century, Annali Dell Intituto E Museo Di Storia Della http://web.mat.bham.ac.uk/C.J.Sangwin/Sliderules/circlesproportion.html

Oughtred's Circles of Proportion Introduction The following page contains sections of William Oughtred's Circles of Proportion. The circles have an interesting bibliographical history but this is not the place to elaborate on those details. I have not, as yet, been able to include the full text. Any errors and omissions from the original are mine alone. I have tried to preserve the original spelling. Contents Front piece Epistle Dedicatorie To the honourable and renowned for vertue, learning, and true valour, Sir Kenelme Digbye Knight. The First Part of this Booke Shewing the use of the First side of the instrument, for the working of the Proportions both simple and compound, and the ready and easie reolving of questions both in Arithmetique, Geometrie, and Astronomie, by Calculation. To the English Gentrie and all others studious of the Mathematicks which shall bee Readers herof. The just Apologie of Wil: Oughtred against the slanderous insimulations of Richard Delamain, in a Pamphlet called Grammelogia, or the Mathematical Ring or Mirifica logarithmorum projectio circularts. [References] The Circles of Proportion and the Horizontall instrument.

20. The Galileo Project O8C2 AJ Turner, William Oughtred, richard delamain and the Horizontal Instrument AJ Turner, The Mathematical Practitioner richard delamain and his Son http://galileo.rice.edu/Catalog/NewFiles/delamain.html

Delamain [Delamaine], Richard 1. Dates Born: unknown first recorded in 1629. Died: before 1645 when his widow petitioned. Dateinfo: Flourished (two dates give known period) Lifespan: N/A 2. Father Occupation: Unknown No information. No information on financial status. 3. Nationality Birth: English Career: English Death: English 4. Education Schooling: No University Originally a joiner by trade, he studied mathematics at Gresham College. 5. Religion Affiliation: Anglican assumed 6. Scientific Disciplines Primary: Mathematics Delamain is known almost entirely for his essay, Grammelogia, or the Mathematical Ring, which deals with practical mathematics and a couple of instruments, and for the controversy the work generated with Oughtred. He also published The Making, Description, and Use of . . . a Horizontal Quadrant, 1631, which was part of the controversy. As far as Oughtred was concerned, Delamain was a simple plagiarist who stole instruments that Oughtred designed but did not seriously understand them. On the whole modern commentators appear to doubt Delamain's originality. There is enough uncertainty for me to leave him in the catalogue. 7. Means of Support

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