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1. On some Improvements in the Instruments of Nautical Astronomy

Published online by Cambridge University Press:  16 March 2015

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Extract

The excessive motion of a ship at sea renders the use of the ordinary instruments employed on land impossible, and restricts the sailors to the use of one on the principle of the duplication of images discovered by Hadly.

Type
Proceedings 1851-52
Copyright
Copyright © Royal Society of Edinburgh 1857

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