Overview
Explore the fascinating history of timekeeping and navigation in this comprehensive lecture by William J. H. Andrewes, a renowned Sundial Architect and Horological Consultant. Delve into the intricate relationship between latitude, longitude, and timekeeping methods, including the lunar distance and time keeper approaches. Discover the impact of Galileo's telescope and the development of timekeeping devices in France. Learn about the challenges faced by seafarers, including shipwrecks and navigating treacherous waters like Cape Horn. Examine the evolution of timekeeping mechanisms, from pendulums and observatories to balance springs, with a focus on improving accuracy and precision. Explore the groundbreaking work of John Harrison and his circular error solution, as well as the contributions of other horological pioneers like George Graham. Follow the development of Harrison's timekeepers, from the H1 clock to the pocket watch, and understand the role of government in this process. Gain insights into William H. Andrewes' own experiences and the legacy of Harrison's work, including George Daniels' modern interpretations. Conclude with a look at the Harrison Exhibition and the recognition of these horological achievements through Royal Observatory medals.
Syllabus
Introduction
Latitude and Longitude
Lunar Distance Method
Time Keeper Method
Galileos Telescope
France
Shipwrecks
Cape Horn
Keeping Time
Pendulum
Observatory
Balance Spring
Accuracy and Precision
John Harrison
Circular Error
The Grasshopper
George Graham
H1 Clock
The Lizard Point
The Second Keeper
The Balance Spring
The Pocket Watch
The Government
The Timekeeper
William H Andrewes
Harrison
Quill
George Daniels
George Daniels Workshop
Completed Clock
Royal Observatory medals
Harrison Exhibition
Taught by
Horological Society of New York