The ready observator
Subtitle: or an infallible method for determining the latitude at sea: by altitudes of the sun, ... By N. D. Falck.
Series: Eighteenth century -- reel 1394, no. 04.
Publisher: printed for the author and sold by Wells and Grosvenor; by the mathematical instrument-makers, and all booksellers in the sea-port-towns in Great Britain
Published: 1771
Place of publication: London
Language: eng
Format: Microform
Number of pages: 64
Notes: The titlepage is engraved.

The text consists mostly of logarithmic tables.

With a final advertisement leaf.

Microfilm. Woodbridge, CT Research Publications, Inc., 1985. 1 reel ; 35mm. (The Eighteenth Century ; reel 1394, no. 04).