An explanation of a new construction and improvement of the sea octant and sextant, containing, A most easy, expeditious and accurate Method of adjusting and rectifying those Instruments for Use both at Sea and Land. Also the best Disposition of the Glasses; with Directions for making the Fore and Back Observations; and the several Steps in the Process of finding the Longitude at Sea. Illustrated by four Copper-Plates. By B. Martin.
- Martin, Benjamin, 1705-1782.
- Date:
- [1775?]
- Books
- Online
Online resources
About this work
Publication/Creation
London : printed for the author, at No. 171, Fleet-Street, [1775?]
Physical description
[2],37,[1]p., fold.plates ; 80.
Contributors
References note
ESTC T25321
Reproduction note
Electronic reproduction. Farmington Hills, Mich. : Thomson Gale, 2003. (Eighteenth century collections online). Available via the World Wide Web. Access limited by licensing agreements.