Article ID: CBB324390337

How Was Edmond Halley’s Map of Magnetic Declination (1701) Constructed? (2017)

unapi

Edmond Halley made two scientific voyages in the Atlantic Ocean as captain of the HMS Paramore between 1698 and 1700. Following these voyages he published the first map showing lines of equal magnetic declination in 1701. Halley did not reveal how he constructed the map, however, and it remains unknown. In this study, a construction procedure is hypothesized that uses mathematical tools that were available in his day, namely arithmetical averages and Isaac Newton’s method of divided difference for fitting a polynomial curve to data. To enable his map construction, a method is suggested whereby Halley could have created new data to augment the situations where insufficient data were collected.

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Authors & Contributors
Aspaas, Per Pippin
Cook, Alan H.
Enebakk, Vidar
Fornasiero, Jean
Hansen, TrulsLynne
Hornsby, Stephen
Journals
British Journal for the History of Science
Notes and Records: The Royal Society Journal of the History of Science
Archive for History of Exact Sciences
Centaurus: International Magazine of the History of Mathematics, Science, and Technology
History of Meteorology
Imago Mundi: A Review of Early Cartography
Publishers
Johns Hopkins University Press
McGill-Queen's University Press
Oxford University Press
Scarecrow Press
Springer
Yale University Press
Concepts
Scientific expeditions
Maps; atlases
Geomagnetism
Travel; exploration
Cartography
Geography
People
Halley, Edmond
Gauss, Carl Friedrich
Baudin, Nicolas
Cook, James
Des Barres, Joseph F. W.
Hansteen, Christopher
Time Periods
19th century
18th century
17th century
20th century, early
16th century
20th century
Places
Great Britain
North America
Polar regions
Atlantic Ocean
Atlantic world
Chile
Institutions
National Maritime Museum (Great Britain)
American Philosophical Society
Great Britain. Royal Navy
Observatorio Astronómico Nacional de Chile
International Polar Year (1882-1883)
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