The description and use of a new astronomical instrument, for taking altitudes of the sun and stars at sea, without an horizon
Subtitle: together with an easy and sure method of observing the eclipses of Jupiter's satellites, or any other phoenomenon of the like kind, on ship-board ...
Publisher: Printed for G. Strahan, W. Meadows, and J. Clarke [etc.]
Published: 1735
Place of publication: London
Language: eng
Number of pages: 31
Notes: By Willaim Ward and Caleb Smith.-cf. Brit. mu. cat.