The description and use of the current logg; or, an instrument to try a current when a ship is under sail; by which The true Distance may be measured, and the Direction and Velocity of the Current at any Time found. To which is added, the use of Hadley's quadrant. for Taking of Angles and Heights in surveying of Land, Bays, Harbours, &c. or taking the Distances of Capes and Headlands when at Sea. By William Orcherton, M. A. A Teacher of Mathematics in the Royal Navy during the late War.

  • Orcherton, William.
Date:
MDCCLXIV. [1764]
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London : printed for the author, and J. Millan opposite the Admiralty, MDCCLXIV. [1764]

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[2],ii,29,[3]p. : ill. ; 120.

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References note

ESTC T112228

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Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.

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