Contributions to terrestrial magnetism.—No. V
In this paper the author details and discusses the magnetic observations made on board Her Majesty’s ships Erebus and Terror, between October 1840 and April 1841, being the first summer which the expedition under the command of Captain James Clark Ross, R. N., passed within the Antarctic Circle. The...
| Published in: | Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
The Royal Society
1843
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1098/rspl.1837.0239 https://royalsocietypublishing.org/doi/pdf/10.1098/rspl.1837.0239 |
| Summary: | In this paper the author details and discusses the magnetic observations made on board Her Majesty’s ships Erebus and Terror, between October 1840 and April 1841, being the first summer which the expedition under the command of Captain James Clark Ross, R. N., passed within the Antarctic Circle. The elimination of the influence of the ship’s iron in the calculation of the results of these observations occupies a considerable portion of the paper. Formulæ for this purpose are derived from M. Poisson’s fundamental equations, and the constants in the formulæ are computed for each of the two ships, from observations made on board expressly with that object. With these constants, tables of double entry are formed for each of the three magnetic elements, namely, declination, inclination, and intensity, giving the required corrections of each, for all the localities of the voyage. |
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