‘Magic is No Magic’ The Wonderful World of Simon Stevin WIT PRESS WIT Press publishes leading books in Science and Technology. Visit our website for the current list of titles. www.witpress.com WIT eLibrary Home of the Transactions of the Wessex Institute, the WIT electronic-library provides the international scientific community with immediate and permanent access to individual papers presented at WIT conferences. Visit the WIT eLibrary at http://library.witpress.com The only portrait of Stevin was probably painted shortly after he died. In the top left and right corners are the dates and places of his birth and death. Leiden, University Library, Special Collections ‘Magic is No Magic’ The Wonderful World of Simon Stevin Authors: Jozef T. Devreese University of Antwerp, Belgium Guido Vanden Berghe Ghent University, Belgium Jozef T. Devreese University of Antwerp, Belgium Guido Vanden Berghe Ghent University, Belgium Translated by Lee Preedy Cover concept: Sara Van Gucht Graphics: Vladimir Gladilin Design: Keith Godwin Cover photo: © Davidsfonds Publishers (Daniël Geeraerts). Published by WIT Press Ashurst Lodge, Ashurst, Southampton, SO40 7AA, UK Tel: 44 (0) 238 029 3223; Fax: 44 (0) 238 029 2853 E-Mail: [email protected] http://www.witpress.com For USA, Canada and Mexico WIT Press 25 Bridge Street, Billerica, MA 01821, USA Tel: 978 667 5841; Fax: 978 667 7582 E-Mail: [email protected] http://www.witpress.com British Library Cataloguing-in-Publication Data A Catalogue record for this book is available from the British Library ISBN-10: 1-84564-092-6 ISBN-13: 978-1-84564-092-6 Library of Congress Catalog Card Number: 2006934780 No responsibility is assumed by the Publisher, the Editors and Authors for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. © WIT Press 2008 Printed in Great Britain by Athenaeum Press Ltd. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the Publisher. Dedications Dedicated by Jozef T. Devreese to: Rose-Marie, Jeroen, Gert, Veronique, Sarah, Charlotte, Jorik, Annemie, Jacques, Jessica, Stefanie, Jasper, Jana Dedicated by Guido Vanden Berghe to: Magda, Kristof, Beatrijs, Hanne, Lore, Quinten, Tine, Stefaan, Caroline, Machteld, Michiel, Marthe, Hermelien, Jeroen, Griet, Jona, Elke, Peter, Lotte, Robin, Maaike, Stijn, Maarten, Hannes This page intentionally left blank Contents Foreword xiii Preface xv Acknowledgements xix Note to the reader xxi Stevin’s works mentioned in the text xxiii Prologue. The Low Countries in Stevin’s day xxix Chapter One. Simon Stevin and the Renaissance 1 1. Middle Ages, Renaissance and the Modern Age 1 1.1. The transition from the Middle Ages to the Renaissance was a gradual one 1 2. Printing 1 2.1. From the Officina Plantiniana in the Netherlands scientific knowledge spread across the whole of Europe 1 3. The universities 3 3.1. From 1426 Leuven was in the ascendant in the Southern Netherlands. 150 years later, Leiden became a Calvinist bastion in the north 4 4. The Renaissance in art, literature, science and technology 5 4.1. A new lease of life for ancient texts 5 4.2. The Renaissance was the prelude to the great scientific revolutions of the seventeenth century 7 5. Simon Stevin: Scholar and Engineer 8 Box 1 : How did Stevin know the works of the ancient Greeks? 9 Chapter Two. Simon Stevin, religious exile? 17 1. The Bruges period 17 1.1. The birth of a natural child in Bruges 17 Box 1 : Documents in the Bruges city archives 19 1.2. Burgomasters and aldermen on the spear side 22 1.3. Magistrates and merchants on the distaff side 23 Box 2 : Calvinism in Bruges between 1550 and 1584 25 Box 3: Important dates in Simon Stevin’s life 28 1.4. Coming of age at twenty-eight 32 1.5. Simon Stevin’s travels 33 2. Dedication to the Republic 34 Box 4: The University of Leiden 35 2.1. The young Stevin is enormously productive. He also applies his theoretical research in practice 40 Box 5: A letter to the town council of Gdánsk 41 2.2. Friendship with Maurice of Nassau ensures Stevin’s future in the northern Netherlands 42 2.3. The scholar from Bruges becomes involved with the politics of the northern Netherlands 43 2.4. Stevin’s mathematical approach to fortification-building is translated into German, French and English 44 2.5. Stevin’s sailing chariot 45 Box 6:Maurice of Nassau 47 3. Married life and descendants 49 3.1. Three natural children 50 3.2. Stevin’s death 51 3.3. Stevin’s descendants 52 Chapter Three. The man who ‘invented’ the decimal system 55 1. Decimal fractions for elementary calculations 55 2. Translations of Stevin’s De Thiende 55 3. Uniform ways of counting and measuring 57 Box 1: The decimal system before and after Stevin 59 3.1. Stevin begins with a definition of the concept of the Thiende – the Tenth, or Dime 62 Box 2: An addition of decimal fractions 64 Box 3: Extracting roots 66 Box 4: Of weights and measures 68 Box 5: A chaotic monetary situation in the Low Countries 70 Box 6: Shakespeare and De Thiende 74 Box 7: The dollar and the disme 75 Chapter Four. Engineer and Inventor 79 1. Patents 79 1.1. Raising water 79 Box 1: Patent granted by the States of Holland on 17 February 1584 80 1.2. A roasting spit 81 2. Mills 84 2.1. Stevin turned his mills by theory 84 Box 2: The IJsselstein mill 86 2.2. A long tradition of impoldering 87 3. Sluices 88 3.1. Of sluices and locks 89 4. Hydraulic designs 91 Box 3: Extract from Van den handel der Waterschuyring onses Vaders Simon Stevin 93 4.1. Stevin’s son Hendrick and the impoldering of the Zuiderzee 95 5. Navigation 96 5.1. The straight and curved tracks… 96 5.2. Stevin replaces Plancius’s four agonic lines with six 98 6. The Art of War (military science) 99 6.1. Stevin’s presence in military camps 100 6.2. A proposal for army administration 101 7. Stevin as an architect 105 7.1. Town Planning 107 7.2. House building 107 Chapter Five. Economist avant la lettre 111 1. Introduction 111 1.1. Stevin and the reorganization of the princely lands 112 2. The Nieuwe Inventie 113 2.1. IsNieuwe Inventie Stevin’s first publication? 113 Box 1: Double-entry or Italian bookkeeping 115 3. The Tafelen van Interest 118 Box 2:Le grand parti 119 3.1. Demystifying the calculation of interest 120 3.2. Examples to illustrate the theory of simple and compound interest 121 4. Bookkeeping 122 4.1. Bookkeeping for merchants 122 4.2. Bookkeeping for a prince and his lands 126 Chapter Six. Wonder en is gheen wonder 131 1. Introduction 131 1.1. The negation of perpetual motion applied in both statics and hydrostatics 133 1.2. Practical problems provide the impetus for studies on weighing and hydrostatics 133 1.3. Definitions, axioms and propositions: the axiomatic approach 135 2. The structure of De Beghinselen der Weeghconst 136 Box 1: The clootcrans 136 2.1. The centre of gravity of a solid body 139 2.2. The lever 139