John Napier: Life, Logarithms, and Legacy John Napier LIFE, LOGARITHMS, AND LEGACY Julian Havil PRINCETON UNIVERSITY PRESS PRINCETON AND OXFORD Copyright © 2014byPrincetonUniversityPress PublishedbyPrincetonUniversityPress, 41WilliamStreet,Princeton,NewJersey08540 IntheUnitedKingdom:PrincetonUniversityPress, 6OxfordStreet,Woodstock,OxfordshireOX201TW AllRightsReserved ISBN:978-0-691-15570-8(alk.paper) LibraryofCongressControlNumber:2012931844 BritishLibraryCataloguing-in-PublicationDataisavailable ThisbookhasbeencomposedinLucidaBright TypesetbyT&TProductionsLtd,London Printedonacid-freepaper∞(cid:2) press.princeton.edu PrintedintheUnitedStatesofAmerica 1 3 5 7 9 10 8 6 4 2 This book is dedicated to my students who, over many years, have provided the catalyst to perpetuate a teacher’s enthusiasm Writingabookisanadventure.Tobeginwithitisatoy,thenanamusement.Thenit becomesamistress,andthenitbecomesamaster,andthenitbecomesatyrantand, inthelaststage,justasyouareabouttobereconciledtoyourservitude,youkillthe monsterandflinghimtothepublic. Churchill,ChurchillByHimself RichardRich:“AndifIwas(agoodteacher),whowouldknowit?” SirThomasMore:“You,yourpupils,yourfriends,God.Notabadpublic,that…” RobertBolt,AManForAllSeasons IthinkandIthinkformonthsandyears.Ninety-ninetimes,theconclusionisfalse. ThehundredthtimeIamright. Einstein John(whomwenowcallNapier,butwhoneverspelthisnamethatwayinhislife) actuallyspelthisnameFIVEdifferentwaysononepageofaletter CharlieNapier Napier Nepper Joanne Nepare Neper Naper Napar John Jhone Naipper Napeir Napere Napair Joannis Nepeir Napare
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