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Earth's Magnetism in the Age of Sail pdf epub mobi txt 电子书 下载 2022


Earth's Magnetism in the Age of Sail

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Jonkers, A.R.T.
Johns Hopkins Univ Pr
2003-4
280
$ 58.76
HRD
9780801871320

图书标签: STS  EarlyModernEuropean   


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发表于2022-05-16

Earth's Magnetism in the Age of Sail epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2022

Earth's Magnetism in the Age of Sail epub 下载 mobi 下载 pdf 下载 txt 电子书 下载 2022

Earth's Magnetism in the Age of Sail pdf epub mobi txt 电子书 下载 2022



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From about 1600 to 1800 scientists and mariners made increasingly sophisticated attempts to understand the earth's magnetic field and use it in navigation. Europeans had long understood the difference between magnetic and true north, but why did it vary as one traversed the sea? Could this variation be used to pinpoint longitude? Drawing on a wealth of unpublished sources-including manuals, treatises, sailing directions, and logbooks in a half-dozen languages-A. R. T. Jonkers explores these early efforts both for what they reveal about the history of science and navigation and as a unique record of the actual changes in the earth's magnetic field. The result, a masterful combination of science and history, will appeal to a broad audience of specialists as well as general readers.

Earth's Magnetism in the Age of Sail 下载 mobi epub pdf txt 电子书

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