"Version: 20171101"--Title page verso.Includes bibliographical references.Preface -- Introduction -- Glimpses in brief -- 1. The metre and the metric system -- part 1. The making of the metre -- 1.1. Introduction -- 1.2. The birth of the metric system -- 1.3. The Meridian Expedition -- 1.4. How the Meridian was measured -- 1.5. From angles to metres -- 1.6. Measuring the base lines -- 1.7. Crun…
"Version: 20180901"--Title page verso.Includes bibliographical references (page 25).1. Introduction -- 2. Background -- 3. Current directions -- Fundamental constants instead of units -- The Kibble balance -- X-ray crystal density method -- 4. Outlook.Units are at the heart of science and technology. Most measurements require units to express their result. The International System of Units (SI)…