Time and Time Again
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Time and Time Again

Determination of longitude at seain the 17th Century
Sofort lieferbar | Lieferzeit: Sofort lieferbar I
Richard de Grijs
IOP Expanding Physics ISSN
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This book explores the role Dutch scholars played in the development of instruments and technology in the 17th Century that would allow sailors to accurately and precisely determine their position, in particular longitude, using the motions of the Sun/stars together with accurate time pieces.

Determination of one’s longitude at sea has perplexed sailors for many centuries. The significant uptake of world trade in the 17th and 18th Centuries rendered the increasingly urgent need to solve the ‘longitude problem’, an issue of strategic national importance. Historical accounts of these efforts often focus almost exclusively on John Harrison’s role in 18th-Century Britain. This book starts instead from Galileo Galilei’s late-16th-Century development of an accurate pendulum clock, which was first achieved in practice in the mid-17th-Century by Christiaan Huygens in the Dutch Republic. It is primarily based on collections of letters that have not been combined into a single volume before. Extensive introductory chapters on the history of map making, the establishment of the world’s reference meridian at Greenwich Observatory, and the rise of the scientific enterprise provide the appropriate context for non-expert readers to fully engage with the book’s main subject matter

1 - Changing times

2 - Global development of mathematical geography

3 - Early insights inspired by Galileo Galilei

4 - The importance of high-precision timekeeping

5 - The long road to a practical marine timepiece

6 - The merits of horology versus astronomy

EPILOGUE - Zero longitude

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