41. Online Text Of William Oughtred's Circles Of Proportion The following page contains sections of william oughtred s Circles of Proportion . 1 AJ Turner william oughtred, Richard Delamain and the Horizontal 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.

42. The Invention Of The Slide Rule william oughtred was a clergyman and keen mathematician. There is little, ifany, dispute that william oughtred invented the rectilinear (straight) 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

43. Rare Books Oughtred Trigonometry oughtred, william (15751660). Trigonometrie. London, Joseph Moxon, 1657. An English mathematician, william oughtred attended Eton and King’s College, http://www.wofford.edu/sandorTeszlerLibrary/rareBooks/authors/oughtredTrigonomet

Seventeenth Century Imprints Title page Oughtred, William Trigonometrie . London, Joseph Moxon, 1657. 40 pp. with portrait of Oughtred by Faithorne. Octavo, leather. Hand-lettered inscriptions: From J.H. and Sallie H. Carlisle, 1909 on flyleaf. Portrait of Oughtred Description An English mathematician, William Oughtred attended Eton and King’s College, Cambridge. Though ordained, he concerned himself less with theology than with formulae. Taking occasional pupils, he instructed a son of Sir William Backhouse, to whom he dedicated Trigonometrie. Oughtred introduced the symbols “x” for multiplication and “::” for in proportion. Boyle and Newton warmly commended him. (DNB) Joseph Moxon (1627-1691) was a partner in his father’s printing shop until the age of 23. He began in 1650 his studies of globe and map-making, hydrography and making mathematical instruments. Charles II assigned him to the post of Royal Hydrographer in 1662, and he entered the Royal Society in 1678. A type-founder of repute in an age of professional laxity, he issued his first specimen sheet in 1668 or 1669. The first number of Mechanick Exercises appeared in 1678, and Mechanick Exercises on the Whole Art of Printing was published in 1683. (AP)

44. Rare Books Oughtred Sines Tangents Title Page, oughtred, william (15751660). Canones Sinuum (Bound in withTrigonometrie) London, Joseph Moxon, 1657. 244 pages. http://www.wofford.edu/sandorTeszlerLibrary/rareBooks/authors/oughtredCanones.as

Seventeenth Century Imprints Title Page Oughtred, William Canones Sinuum ... (Bound in with Trigonometrie ) London, Joseph Moxon, 1657. 244 pages. 16th century 17th century Classical Religious ... Back to Rare Books search wofford: Directory Email BannerWeb 429 North Church Street, Spartanburg, SC 29303 webmaster@wofford.edu

45. William Oughtred (1575-1660), Mathematician National Portrait Gallery, list of portraits for william oughtred includingwilliam oughtred copy by George Perfect Harding, after an engraving by http://www.npg.org.uk/live/search/person.asp?LinkID=mp03396

46. NPG 2906a; William Oughtred NPG 2906a; william oughtred. Sitter william oughtred (15751660), Mathematician.Sitter in 1 portrait. Artists George Perfect Harding (1781-1853), http://www.npg.org.uk/live/search/portrait.asp?LinkID=mp02236&rNo=0&role=art

47. William Oughtred - Anagrams Rearranging the letters of william oughtred (Mathematician, invented the sliderule) gives Find more anagrams of william oughtred (or any other text)! http://www.anagramgenius.com/archive/william-oughtred.html

Archive The definitive site for fun anagrams! William Oughtred anagrams Rearranging the letters of William Oughtred (Mathematician, invented the slide rule) gives: I am ruled with log. (by Mike Mesterton-Gibbons by hand) Download FREE anagram-generating software for your Windows computer Webmasters: make money from your website! Instructions for linking to this page! Learn about the Anagram Genius software (Windows/MacOS) Search the Archive Add YOUR anagrams to the Archive! League table of top contributors Find anagram aliases of william oughtred (or any other text)! Find gold service anagrams of william oughtred (or any other text)! Anagram Genius Archive Main Index Anagram Genius Archive United Kingdom Index www.anagramgenius.com home page Search the anagram archive (e.g. osama) Subject Author Anagram See this page for more relating to william oughtred william oughtred - anagrams page and William Tunstall-Pedoe

48. The Cornell Library Historical Mathematics Monographs Document name william oughtred, a great seventeenth. Go to. page NA ProductionNote, page iv Title page, page v Table of contents http://historical.library.cornell.edu/cgi-bin/cul.math/docviewer?did=04380001&se

49. Biographies By Year Index Ayton, Sir Robert (of England) To Cortese, Giulio Cesare de Leyva, Marianna Leeghwater, Jan Adriaensz.Mendoza Monteagudo, Juan de Montchréstien, Antoine de oughtred, william http://www.allbiographies.com/1570-MB-1575-WI.php

search biography names match all words match any words use wildcards browse biographies get a new biography browse by name browse by year online dictionary allmath.com math for students travel deals hotel rooms browse by year Ayton, Sir Robert (of England) Dekker, Thomas Fawkes, Guy Lippershey, Hans or Jan ... Oughtred, William browse by year 2700 - 691 BC 690 - 531 BC 530 - 481 BC 480 - 391 BC ... No Birth Date browse by name A B C D ... Allsites LLC

50. Imago Mundi - William Oughtred. william oughtred qui a introduit la croix (X) pour signifier http://www.cosmovisions.com/Oughtred.htm

Les gens Oughtred , sur la construction des , sur la formation des puissances. logarithmiques Gunter ; l'exposition s'en trouve dans l' Arithmeticae in numeris et speciebus institutio The Vey of mathematics Clavis mathematica Circle of proportion (Londres, 1632; 3 e Solution of all spherical triangles (Oxford, 1657); Trigonometry (Londres, 1657); Canones sinuum, tangentium Opuscula mathematica hactenus inedita Charles II (L. S.). A B C D ... Z

51. Computing Before Computers william Aspray, author of the Introduction, Chapter 3, and the Epilogue, 192 Orreries, 163171 Orrery, Earl of, 165 oughtred, william, 28-30. http://ed-thelen.org/comp-hist/CBC.html

Go to On Line Documents , Go to Go to Antique Computer home page This is a presentation of Computing Before Computers Edited by William Aspray with contributions by W. Aspray A. G. Bromley M. Campbell-Kelly P.E. Ceruzzi M. R. Williams ISBN 0-8138-0047-1 1. Calculators-History. 2. Computers-History. I. Aspray, William. Statement of permission to web publish Scanned, and processed into Adobe .PDF format by Ed Thelen September 2000 from a first edition copy lent by Michael R. Williams - one of the contributors. To make the contents of this 266 page book more accessable for Internet viewers: the various chapters and sections are presented as separate files of 6 megabytes max each the Table of Contents (linked to the sections) is presented below the Index is presented below. (searchable by your browser) each .PDF section is searchable by the Adobe Acrobat viewer - "Image on Text". Table of Contents Introduction .................................... vii William Aspray Chapter One: Early Calculation Michael R. Williams Chapter Two: Difference and Analytical Engines Allan G. Bromley

52. Oughtred Society Slide Rule History. william oughtred In about 1622 william oughtred, an Anglican minister This design, first created by william oughtred in 1633, sees widespread use well http://www.oughtred.org/history-new.shtml

History In Memoriam Journal ... Swap Sheet Online [password access] HOME Slide Rule History Prologue In the 16th Century, engineering design as we know it today, with its emphasis on precise measurements and finely calculated tolerances, is unthinkable. And yet, every scientist, mathematician and alchemist feels that there are basic fundamental mathematical relationships that underpin the natural world. The pre-eminent figures in science both contribute to the creation of the slide rule and make use of it in their work, including Galileo, Napier, Gunter, Oughtred, Newton, Gauss, Watt, Priestley, Fulton, Fuller, Einstein, Fermi, and Von Braun. A quick look at the first five of these men covers the creation and initial evolution of the slide rule. Just Before the Slide Rule John Napier dramatically advances the understanding of number relationships in 1614 with his invention of logarithms. Since logarithms are the foundation on which the slide rule is built, its history rightly begins with him. His early concept of simplifying mathematical calculations through logarithms makes possible the slide rule as we know it today. Chronology of the Slide Rule Napier himself contributes Napier's Bones in 1617, calculating sticks based on logarithmic distances. In 1620 Edmund Gunter of London makes a straight logarithmic scale and performs multiplication and division on it with the use of a set of dividers, or calipers.

53. Oughtred Society Interesting Slide Rule Links. william oughtred Napier s Bones and the GenailleLucas Rulers Slide RuleOn-Line Museum - the Collection of Dr. Joern Luetjens (Germany) http://www.oughtred.org/srlinks.shtml

History In Memoriam Journal ... Swap Sheet Online [password access] HOME Links Library: Slide Rule and Mechanical Calculator Web Sites Table of Contents The Links Library is one long list, organized by sections. Either scroll through the list or use this Table of Contents to jump to a section. If you have additional links to suggest, please send e-mail to webdesigner@oughtred.org General Information: Slide Rules General Information: Calculators Organizations: Slide Rules ... Museums General Information: Slide Rules Slide Rule Universe Hemmi Slide Rule Archive Otis King's Patent Calculator Basic Slide Rule Instructions ... Astragal Press General Information: Calculators John Wolff's Web Museum Calculators Online Center Calculator Museum - Hans Bloemen The Hewlett Packard Museum of Calculators ... Arithmometre.org Organizations: Slide Rules The Oughtred Society The International Slide Rule Group Dutch Circle of Slide Rule Collectors United Kingdom Slide Rule Circle ... The Slide Rule Trading Group Organizations: Calculators [ none active ] Sellers: Slide Rules Slide Rule Universe Vintage Instruments Technical Collectibles Slide Rule Trading Co.

54. Oughtred.eciv.cwru.edu It is named after william oughtred (March 5, 1574 June 30, 1660). william oughtredwas born in Eton; Buckinghamshire, England attended Eton School, http://asce.cwru.edu/oughtred.html

Oughtred.eciv.cwru.edu Intel 486/66 running Linux redhat 5.2 This computer is a file server for Unix computers with NFS access to the Computational Mechanics Lab and Samba access as part of the ECIV NT Domain. It has 18 Gbytes of disk space. The disks are mounted as /arch1 to /arch4 on the workstation computers. It is named after William Oughtred (March 5, 1574- June 30, 1660). William Oughtred was born in Eton; Buckinghamshire, England attended Eton School, and King's College Cambridge. He received his B.A. in 1596 and his M.A. in 1600. Oughtred's wrote Clavis Mathematicae that included a description of Hindu-Arabic notation and decimal fractions. The text was written for instruction of his pupil, the son of the Earl of Arundel and published in 1631. This text was read by a young Isaac Newton and was Newton’s introduction to mathematics. Oughtred is best known for his invention of the slide rule. He was an ordained minister. He may also have been a surveyor and an alchemist. Web Pages about Oughtred: http://www-history.mcs.st-andrews.ac.uk/history/Mathematicians/Oughtred.htm

55. The Oughtred Society The Society takes its name from william oughtred (15741660), the inventor ofthe slide rule. From a nucleus of 11 charter members the Society has grown to http://www.surveyhistory.org/the_oughtred_society.htm

The following information was taken from the Oughtred Society's brochure: "The Oughtred Society was formed in 1991 to serve the needs of the growing number of slide rule collectors and historians. Their objective is to promote an understanding and appreciation of the slide rule as a calculating instrument and to explore its history. The Society takes its name from William Oughtred (1574-1660), the inventor of the slide rule. From a nucleus of 11 charter members the Society has grown to become a worldwide organization with over 400 members. It has established a journal, a biannual swapsheet and a series of popular annual meetings of collectors." "The Oughtred Society invites you to become a member and explore the history of the slide rules and their makers, learn more about the many types of slide rules and their uses, and buy, sell or trade with other members to enhance your collection." "As a member of The Oughtred Society you will receive: Two issues of the Oughtred Society Journal (Spring and Fall) Free listings in the biannual swapsheet Two issues of the swapsheet (Winter and Summer) The current directory of Oughtred Society members An invitation to the Society's annual meeting Notice of other meetings of slide rule collectors, both in the U. S. and abroad"

56. Famous Mathematicians. John 15501617 Cataldi, Pietro Antonio 1552-1626 Briggs, Henry 1561-1630Kepler, Johannes 1571-1630 oughtred, william c.1574-1660 Bachet, Claude-Gaspar, http://home.egge.net/~savory/maths6.htm

Pre-Einstein famous mathematicians. Stu Savory, 2004. If you ask people these days to name a famous mathematician, surveys show the most popular answer to be Albert Einstein . Einstein himself used to like to quote Sir Isaac Newton's famous humble line "If I have seen further than other men, it is by standing on the shoulders of giants." So I asked myself, who were these giants, i.e. famous pre-Einstein mathematicians. Here's the list of the top 100 or so, sorted chronologically. How many do you know? That means you can state what they were famous for, off the cuff, no googling! If you score below 30 you need to do some revision :-) Ahmes c. 1650 B C Pythagoras c.540 BC Hippocrates c.440 BC (that's Hippocrates of Chios, NOT the physician who lived around the same time). Plato c.430-c.349 BC Hippias c.425 BC Theaetetus c.417-369 BC Archytas c.400 B C Xenocrates 396-314 BC Theodorus c.390 BC Aristotle 384-322 BC Menaechmus c.350 BC Euclid c.300 BC Archimedes c.287-212 BC Nicomedes c.240 BC Eratosthenes Gauss , Karl Friedrich 1777-1855 Brianchon, Charles c.1783-1864 Binet, Jacques-Philippe-Marie 1786-1856 Möbius, August Ferdinand 1790-1868 Babbage, Charles 1792-1871 Laine, Gabriel 1795-1870 Steiner, Jakob 1796-1863 de Morgan, Augustus 1806-1871 Liouville, Joseph 1809-1882 Shanks, William 1812-1882 Catalan, Eugene Charles 1814-1894 Hermite, Charles 1822-1901 Riemann, Bemard 1826-1866 Venn, John 1834-1923 Lucas, Edouard 1842-1891 Cantor, George 1845-1918 Lindemann, Ferdinand 1852-1939 Hilbert, David 1862-1943 Lehmer, D. N. 1867-1938 Hardy, G. H. 1877-1947 Ramanujan, Srinivasa 1887-1920

57. Mathematics - Primary Texts - Scientific Revolution Home Page: Research Page - S The key of the mathematicks new forged and filed by oughtred, william, 15751660 . Opuscula mathematica hactenus inedita by oughtred, william, 1575-1660. http://web.clas.ufl.edu/users/rhatch/pages/03-Sci-Rev/SCI-REV-Home/sr-research/e

Scientific Revolution; Information, Bibliography, Resources, Readings, Biography, Sources, Links T H E S C I E N T I F I C R E V O L U T I O N T H E R E S E A C H P A G E - R E S E A R C H R E S O U R C E S Early English Books Online Professor Robert A. Hatch - University of Florida EEBO Early English Books Online EEBO E arly E nglish B ooks O nline, or EEBO , represents one of the premier scholarly resources for scholars, teachers, and students interested in primary printed sources of the Early Modern period, including the Scientific Revolution (Copernicus to Newton). What follows is a detailed introduction and overview of some of the holdings of EEBO . For the convenience of the reader, the titles of available printed works have been arranged chronologically by topic. Some of the categories are, or will appear, anachronistic. These listings are nevertheless intended to provide a clearer idea of the precise holdings of EEBO and to guide and direct potential users of the site. Please note that

58. Today In Technology History - Mar 5 william oughtred, born on this date in 1574. On March 5, 1574, williamoughtred (pronounced AWtred) was born in England. He was educated at Eton and http://www.tecsoc.org/pubs/history/2001/mar5.htm

Today in Technology History (You can receive "Today in Technology History" by e-mail! To subscribe click here ; to read past issues click here March 5 Today we celebrate the slide rule and its inventor. On March 5, 1574, William Oughtred (pronounced AW-tred) was born in England. He was educated at Eton and Cambridge, and although he was a minister by profession, he spent nearly all his free time studying and teaching mathematics. In college, he became a workaholic who stayed awake late into the night studying math a habit he retained his entire life. Oughtred's contributions to mathematics were substantial. In his most famous book, Clavis Mathematicae (The Keys to Mathematics), he introduced several new mathematical symbols, such as the "x" for multiplication. In the 1620s or early 1630s, Oughtred invented the "slide rule" a device that lets users perform difficult calculations without consulting tables, by carefully sliding two specially-marked rulers against one another. Oughtred's original slide rule was actually round, made of rings which he called "circles of proportion," but it was not long before slide rules were made straight and much more convenient. The slide rule became the proud badge and status symbol of the mathematician, the scientist and the engineer. It was an utterly indispensable tool for more than three centuries, until it was supplanted in 1971 by the pocket calculator. Many of the men and women who were trained to use slide rules still treasure their retired tools as fond reminders of a bygone subculture, and of a different way of thinking.

59. Doug Coward's Analog Computer Museum william oughtred. English mathematician and clergyman william oughtred inventedthe slide rule in 1621, based upon Napier s logarithms. http://dcoward.best.vwh.net/analog/analog1.htm

Analog Computer Museum Definitions Computer - A machine that caculates. Analog computer - A computer that performs mathematical operations in a parallel manner on continuous variables. The components of the computer are assembled to permit the computer to perform as a model, or in a manner analogous to some other physical system. Mechanical analog computer - An analog computer with input and output usually expressed as shaft postion or degrees of shaft rotation. Electronic analog computer - An analog computer with input and output usually expressed as direct current voltages. Hybrid computer - A computer with both analog and digital computing elements interconnected. What are Electronic Analog Computers Electronic analog computers may seem to be "simple" or "like a toy computer", in fact they are powerful tools that were used during the 1950s and 1960s to design and test systems like ICBMs, supersonic aircraft and spacecraft. But the analog computer can be used to model any physical system that can be described by mathematical formulas, even more mundane ones from modeling the effects of pollution on the fish population in a river to fine tuning the suspension on a new car design. Analog computers will not only test a fixed design but also allows variables to be quickly changed to test "what if" conditions. By scaling time as an independent variable, physical processes that happen quickly can be stretched out, and processes that happen over a long period can be shortened to make the process easier to study. And it is very easy to study variables at any point in the program while it is running to find faults in the program design.

60. -2600 BC-1799- Mr. william oughtred, to become the inventer the sliderule, is born. Mr.william oughtred, inventer of the sliderule, dies. http://www.icwhen.com/book/the_dark_ ages/pre1800.shtml

- 2600 B.C. to 1799 - Donald A. Thomas, Jr. http://www.icwhen.com (Revised -2600 BC- HISTORICAL BENCHMARKS (2600 BC) The abacus is invented. HISTORICAL BENCHMARKS (1550) Mr. John Napier , to become the inventer of Napier's Bones , is born. HISTORICAL BENCHMARKS (1575) Mr. William Oughtred , to become the inventer the sliderule, is born. HISTORICAL BENCHMARKS (1592) Mr. Wilhelm Schickard , to become the inventer the Calculating Clock ; is born. HISTORICAL BENCHMARKS (1614) Mr. John Napier (1550-1617), a Scottish mathematician, invents logarithms. HISTORICAL BENCHMARKS (1615) Mr. William Oughtred (1575-1660), an English mathematician, invents the slide rule HISTORICAL BENCHMARKS (1617) Mr. John Napier passes away this year. Mr. John Napier (1550-1617), a Scottish mathematician, invents a set rods made of sticks of ivory. Napier’s Bones later spawned tools such as advanced slide rules. The invention served as movable multiplication tables and noted as the first modern step to "mechaniize" calculations. Napier is known for his invention of logarithms in 1614. HISTORICAL BENCHMARKS (1621) Mr. William Oughtred (1575-1660), an English mathematician, invents a

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

Page 3     41-60 of 100    Back | 1  | 2  | 3  | 4  | 5  | Next 20