|Published||Engraved for Walker's Geography. [London, Printed and Sold by Darton and Harvey, Gracechurch Street. 1795.]|
|Dimensions||195 x 222 mm|
An illustrations of the orbits of our solar system, engraved by John Walker for the second edition of his 'Elements of Geography and of Natural and Civil History,' usually referred to simply as 'Walker's Geography.' The chart, from his chapter on the Order of the Spheres, shows all of the planets from Mercury to Herschel, one of the names used for the newly discovered planet that would eventually be called Uranus. Surrounding the central illustration are a series of other diagrams and drawings showing comets, sun spots, the motion of night and day, eclipses, and eliptical orbits.
John Walker (fl. 1783-1831) was an English mapmaker, engraver, and publisher, and one of the founding members of the Royal Geographical Society. In addition to the maps he produced through his own business, he also served as hydrographer to the Admiralty from 1797. He had five sons, all of whom were involved in cartography, though John and Charles were the most successful and well known, becoming some of the most prolific mapmakers and publishers of the early nineteenth century. Michael and Thomas Walker were both involved with the Admiralty, and Alexander Walker is credited in partnership with his father on maps originating from Pool Lane in Liverpool.
Condition: Vertical folds, as issued. Some creasing to folds. Time toning to sheet, small tear to bottom left of sheet..