The Nautical Almanac and Astronomical Ephemeris for the Year 1797 [-1800]. Published by Order of the Commissioners of Longitude.
First editions, 4 vols., 8vo (215 x 130 mm), , 162, ; , 162, ; , 162, ; , 162, pp., full cont. tan calf, spine gilt extra with a diagonal cross hatch design, red morocco labels lettered in gilt, very nice copies.
The Nautical Almanac and Astronomical Ephemeris was published from 1767 by Nevil Maskelyne via the Board of longitude, it was the first nautical almanac ever to contain data dedicated to the convenient determination of longitude at sea. He figured all of the lunar-solar and lunar-stellar distances from the Greenwich meridian. Sailors all over the world now relied on Maskelyne’s tables to calculate the longitude from Greenwich, previously, they had been content to express their position as degrees east or west of any convenient meridian.
Author [MASKELYNE (Nevil)]
Publisher London: Printed by C. Buckton,