The Longitude discovered by the eclipses, occulations and conjunctions of Jupiter's planets with descriptions of those refracting and reflecting telescopes, and of those sectors and that quadrant, which are the instruments necessary for this discovery, bo

The Longitude discovered by the eclipses, occulations and conjunctions of Jupiter's planets with descriptions of those refracting and reflecting telescopes, and of those sectors and that quadrant, which are the instruments necessary for this discovery, both at land and sea, to which is added an ephemeris for the latter half of the year of our Lord 1738, containing the configurations of Jupiter's planets at six a clock every evening, while Jupiter is to be any where seen, with those eclipses, occulations and conjunctions that are useful for the discovery of the longitude, both at land and sea... By Will. Whiston,...