LIONEL PINCUS AND PRINCESS FIRYAL MAP DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY LIONEL PINCUS AND PRINCESS FIRYAL MAP DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY
Halley's global magnetic chart, 1744 edition. Global sea chart showing the variation in magnetic compass readings as originally published in the year 1700 by the English astronomer, meteorologist and physicist Edmond Halley (1656-1742). This update by William Mountaine and James Dodson, is dated 1744. In 1698 and 1699 Halley, most famous for his work on comets, was given command of a ship by King George III and told to record geographical variations in compass readings. Four inset boxes describe the map in English and Latin, with a map inset at lower left showing part of the Arctic region in polar projection. For the original map, with dedications included, see image C023/8608.
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