| List of figures and tables | vi |
| List of contributors | vii |
| Introduction - Nadine De Courtenay, Olivier Darrigol and Oliver Schlaudt | 1 |
| 1 The origins of the Metre Convention, the SI and the development of modern metrology - Terry Quinn | | 7 |
| 2 Justifying and motivating an SI for all people for all time - Martin J T Milton | 30 |
| 3 Reforming the International System ofUnits: on our way to redefine the base units solely from fundamental constants and beyond - Christian Bordé | 46 |
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| 4 Strategies for the definition of a system of units - Alessandro Giordani And Luca Mari | 75 |
| 5 Relations between units and relations between quantities - Susan G Sterrett | 99 |
| 6 On the conceptual nature ofthe physical constants - Jean-Marc Levy-Leblond | 125 |
| 7 And how experiments begin: the International Prototype Kilogram and the Planck constant - Sally Riordan | 150 |
| 8 The SI and the problem of spatiotemporal constancy - Ingvar Johansson | 180 |
| Index | 207 |
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