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Harrison Decoded


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Table of Contents

1: Rory McEvoy: Introducing the precision pendulum clock 2: Andrew King: The origins of John Harrison's 'Pendulum-Clock' technology 3: William Andrewes: Introducing Martin Burgess, clockmaker 4: Donald Saff: Rescuing Martin Burgess's Clock B 5: Martin Burgess: Reflections on making clocks Harrison's way 6: Charles Frodsham et al: Completing Clock B 7: Jonathan Betts: Adjusting and testing Clock B at the Royal Observatory, Greenwich 8: Tom van Baak: Crunching the numbers: analysis of Clock B's performance at Greenwich 9: Mervyn Hobden: Decoding the Physical Theory of Harrison's Timekeepers 10: David Harrison: Analysis of the mechanisms for compensation in Clock B 11: Rory McEvoy: Update on Clock B

About the Author

Rory McEvoy has worked in horology for over twenty years. Following a postgrad diploma at West Dean College, Chichester, he practiced in conservation of antique clocks and watches before joining a London auctioneer as a specialist. Since 2010, he has worked at the Royal Observatory as Curator of Horology. Research interests include: timekeeping and astronomy, the development of the precision pendulum clock with particular focus on the work of George Graham FRS and the historical practice of measuring time in the laboratory. Jonathan Betts MBE, FSA, FBHI, FIIC, FRSA was appointed Senior Horology Conservator at the NMM in 1979, and Senior Curator of Horology in 2000. He is Vice Chairman of the Antiquarian Horological Society, is a Past Master of the Worshipful Company of Clockmakers (2014) and a Trustee of the Institute of Conservation. In 1989 he received the NMM Callender Award, in 2002 the Clockmakers' Company's Harrison Gold Medal, in 2008 the BHI Barrett Silver Medal and in 2013 the Plowden Medal (RWHA) for his contribution to Horology Conservation.


...revolutionary work... * Bob Frishman, Kronoscope *
The essays in this fascinating book effectively chart the progress of an extraordinary experiment, conducted over decades but with a recent, and very remarkable outcome * James Nye, The Antiquarian Horological Society Chairman, *
Combining historical context, technical details and experimental information, this well-illustrated edited collection describes the challenges as well as the delights of historical reconstruction. * Patricia Fara, Emeritus Fellow of Claire College, Cambridge *
The authors provide a wonderful vindication of a native genius, following the original work of Martin Burgess. They give us an explanation of an alternative technology to the one accepted for the past 300 years, when it comes to the design of a mechanical precision timekeeper. * Anthony Randall, Winner of the Tomplon Medal from The Clockmaker's Company *
This authoritative and accessible collection of essays tells the fascinating story of [the great clockmaker John Harrison], and how Harrison's enigmatic and astute eighteenth-century account of high-reliability pendulum motion and timekeeping was at last vindicated. * Simon Schaffer, University of Cambridge *

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