Commonly book reviews focus on the most current
publications available on the commercial market.
Still, there aren’t a lot new books for the
navigator.
This review is about a book first published in 1995. The book is Longitude, The True Story of a Lone Genius Who Solved the Greatest
Scientific Problem of His Time. (This
is probably the most accurate title of any saga that I have ever read.) Longitude was written by Dava Sobel. It is available at www.amazon.com either in paperback or as a Kindle edition.
The book is set in England in the 1700’s. The cast of characters range from Sir Issac
Newton to Captain Cook yet focuses on a relatively unknown craftsman, John Harrison.
The measurement of longitude is a critical component of
celestial navigation. It’s grid partner
is Latitude. Prior to the late 1700’s
the measurement of latitude had been accomplished for hundreds of years but
that was only 50% of the puzzle. With measurement of latitude, navigators we
able to determine an east/west line (like the equator) but nothing to cross
that line with a meridian moving north south.
Without that north south component, a ship’s position could not be
accurately determined. For many years Astronomers
looked to the movement of celestial bodies to determine the elusive measurement
of longitude. The measurement of
longitude through the use of an accurate time piece was discounted. Harrison's chronometer |
Sobel’s book concisely outlines the development of the first four Harrison chronometers and the trials of bureaucracy and envy that Harrison endures for over 50 years.
It wasn’t until trials at sea in the late 1700s that the
merit of Harrison’s chronometers became valued.
The naval explorer Captain Cook was an ardent supporter of Harrisons
work and achievement.
This book is a wonderful account of a dedicated craftsman
who had a major impact on celestial navigation.
Update: In 2000 a
film version of Longitude was
produced. It stars Michael Gambon (who
played the fatherly wizard Dumbledore in the “Harry Potter” series) and Jeremy
Irons. It’s available on Netflix.
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