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Harrison Decoded – Towards A Perfect Pendulum Clock - Oxford Scholarship Online
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Harrison Decoded: Towards A Perfect Pendulum Clock

Rory McEvoy and Jonathan Betts


This volume centres on a clock, known as Clock B, built in the mid-1970s that achieved considerable acclaim after an extraordinary performance in a 2015 peer-reviewed public trial at the Royal Observatory, Greenwich. The clock was built according to an understanding of John Harrison’s unique theoretical approach to making precision pendulum clocks, which defies the standard approaches to making accurate clocks. The clock represents the culmination of over forty years of collaborative research into Harrison’s writing on the subject, which is scattered across a number of manuscripts and a book, ... More

Keywords: John Harrison, clock, pendulum, Clock B, Royal Observatory, horology, metrology, precision, astronomy, astronomical, trial, physics, mechanics

Bibliographic Information

Print publication date: 2020 Print ISBN-13: 9780198816812
Published to Oxford Scholarship Online: May 2020 DOI:10.1093/oso/9780198816812.001.0001


Affiliations are at time of print publication.

Rory McEvoy, editor
Curator of Horology, Royal Museums Greenwich

Jonathan Betts, editor
Curator Emeritus of Horology, Royal Museums Greenwich