| 书目名称 | The World of Visual Time Signals for Mariners |
| 副标题 | Time Balls, Time Gun |
| 编辑 | Roger Kinns |
| 视频video | http://file.papertrans.cn/923/922402/922402.mp4 |
| 概述 | Provides an overview of time signals for mariners worldwide that has never been included in previous books.Lavishly illustrated to show readers what time signals looked like and how they were designed |
| 丛书名称 | Historical & Cultural Astronomy |
| 图书封面 |  |
| 描述 | .This book describes the worldwide evolution of land-based visual time signals that were used by mariners in the nineteenth and twentieth centuries for accurate navigation at sea. They followed development of chronometers which were carried in ships to show mean time at Greenwich, the chosen prime meridian. Greenwich time could be compared with local astronomical time to determine longitude, but chronometers were mechanical devices that had to be checked for accuracy. Land-based signals that were regulated by astronomical observations evolved from the ideas in 1818 of Robert Wauchope, a British naval officer who served at the Cape of Good Hope. He inspired introduction of time balls, specifically the time ball at Greenwich in 1833 which set the standard for subsequent installations and is still in operation today. The main emphasis is on the external appearance of time signals at different locations around the world and how they were used by mariners for rating chronometers. Time balls and guns also became popular signals for public use and workplace control but then had social and political implications.. |
| 出版日期 | Book 2024 |
| 关键词 | Astronomical History of Time Guns and Time Balls; Early Methods for Calculating Lunar Distances; Early |
| 版次 | 1 |
| doi | https://doi.org/10.1007/978-3-031-57334-7 |
| isbn_softcover | 978-3-031-57336-1 |
| isbn_ebook | 978-3-031-57334-7Series ISSN 2509-310X Series E-ISSN 2509-3118 |
| issn_series | 2509-310X |
| copyright | The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl |
|Archiver|手机版|小黑屋|
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