A seaman's assistant; shewing how to correct the latitude computed from dead reckonings, and to ascertain the time of the day, and the variations of the compass, by a single altitude. By John Syeds, ...
Syeds, John.
London : printed for the author, and sold by him,
[1794?]
The tables are paginated in letters rather than numerals.
The watermark is dated 1794.
ESTC