By: Alexander K. Johnston
Date: 1856 (published) Edinburgh
Dimensions: 20 x 24 inches (51 x 61 cm)
This fascinating antique map features the magnetic fields of the earth. It is from the second edition of Johnston's Physical Atlas of Natural Phenomena, published out of Edinburgh by William Blackwood & Sons in 1856.
The map delineates the planet's magnetic fields in the years 1780, 1787 and 1840. Johnston provides detailed images of aspects of the main magnetic fields the Earth produces, and denotes the changes in the fields at different points in time.
Alexander Keith Johnston's Physical Atlas of Natural Phenomena was amongst the most comprehensive geographic works focusing on natural science of its day. Johnston described the motivations and focus of his work in the preface as follows; The object originally contemplated in this work was to present, in a graphic form, a concise yet comprehensive view of the Physical Geography of the Globe, embracing under that term its superficial structure, the movements of its aerial and oceanic currents, and the distribution of organized existence on its surface.
Accompanying the map is the original letterpress description from the atlas the discusses in detail the methodology, science, and theory the went into the cartographic work.
Condition: Map is in A+ condition presenting an attractive and vivid imprint on heavy paper with full margins on all sides.
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