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Kurzbeschreibung
First published in 1923, this long-awaited edition of the definitive reference work on the marine chronometer contains additional photographs and many of Rupert Gould's later revisions and corrections. It deals comprehensively with the chronometers history and the earliest attempts to measure longitude while including exhaustive discussions and diagrams of the various mechanisms employed with details of their inventors. It is an extraordinary fact that the first machines capable of accurately determining a ship's longitude, a measurement the great Sir Isaac Newton considered to be a mechanical impossibility, were invented and built by an obscure Yorkshire carpenter named John Harrison (1693 1776). Amazingly, the latter was entirely self-educated and had never served a days apprenticeship to any clockmaker. The Marine Chronometer relates the remarkable story of John Harrison's marine timekeepers which eventually won him a GBP20,000 reward offered by the British Government for any method of determining a ship's longitude to within thirty geographical miles at the end of a six weeks voyage. The author also looks in detail at the inventions of other important scientists and pioneers such as Huygens, Thacker, Sully and Leibnitz as well as the work of professional watchmakers including Ditisheim, Ulrich, Earnshaw, Arnold, Berthoud, Mudge and Le Roy. He writes about technical matters with an expertise and a fluent, easy style to provide his readers with an understanding of material which, in the hands of a lesser writer, would often prove less than clear.
Synopsis
Originally published in 1923, this is a facsimile edition of the definitive reference work on the Marine Chronometer, with seventy additional photographs. This revised edition, now with the author's later revisions and corrections, covers the chronometer's history from the earliest attempts to measure longitude while including detailed discussions and illustrations of the various mechanisms and their inventors. It is difficult to grasp, at first sight, the extraordinary fact that the first machines capable of performing the extraordinary feat of accurately determining a ship's longitude, were designed and made by an obscure Yorkshire carpenter, John Harrison (1693-1776). Harrison was entirely self-educated and never served a day's apprenticeship to any clock maker.The Marine Chronometer is not only the entirely absorbing story of John Harrison's marine timekeepers, which won him the reward of GBP20,000 offered by the British Government for any method of finding a ship's longitude within thirty geographical miles at the end of a six weeks' voyage, but also covers the inventions of such famous scientists and pioneers as Christian Huyghens (1629-95), Jeremy Thacker, Henry Sully and Leibniz. The book also recounts in detail the inventions of other professional clock makers such as Paul Ditisheim, J.G. Ulrich, Thomas Earnshaw, John Arnold, Ferdinand Berthoud, Thomas Mudge and Pierre Le Roy.
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Chronometer Development Explained
11. April 2003
Format:Gebundene Ausgabe
This is an excellent history of the development of the marine chronometer from the earliest attempts through to the modern day. Gould was in an excellent position to write authoritatively because he reconstructed John Harrison's original "sea clocks" some of which had lain forgotten and in a very poor state. He not only restored them and got them working, but described them in detail for posterity.
This book contains a wealth of technical detail, carefully and accurately describing the designs, techniques and principles of the various developments that occurred as timekeeping at sea gradually improved over two centuries. Those who want technical details and explanations will not be disappointed in this book, while those who want to know about the background and the personalities who devoted their lives to the pursuit of accurate timekeeping will find plenty to interest them. The book contains many drawings and sketches of the various escapements which evolved and the other refinements that were invented in the course of the history of the chronometer.
All those interested in the history and technology of mechanical timepieces need to have this book in their library.
400 pages, 40+ photos, 85 sketches.
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