The description and use of a new astronomical instrument, for taking altitudes of the sun and stars at sea, without an horizon; 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; In order to determine the Difference of Meridians at Sea. To which are added, tables for computing the Times when the Eclipses of the First Satellite of Jupiter happen under the Meridian of London.

London : printed for G. Strahan, W. Meadows, and J. Clarke, in Cornhill; C. Rivington, W. Innys and R. Manby, in St Paul's Church-Yard; J. Mann, Optician, at the Archimedes, and J. Senex, against St Dunstan's Church in Fleet-Street; C. Ward and R. Chandler, between the Temple-Gates, and at their Shop in Scarborough; J. Robinson, next the One Tun Tavern, and T. Heath, Mathematical Instrument-Maker, next the Fountain Tavern in the Strand; R. Williamson near Gray's-Inn Gate; and J. Stagg in Westminster-Hall, 1735.

31,[1]p.,plate ; 40.

ESTC T4457

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