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Observations on the variation of the magnetic needle
The author discusses how the needle's direction toward the pole guides navigation and how deviations, tied to fire-laden declination, may yield methods for locating a ship's position. He cites Halley’s lines, debates other lines, and emphasizes land observations to improve seafaring knowledge and longitude determination. He also muses on Africa's exploration potential and the value of cross cultural scientific contact.
MENTIONED IN THIS ARTICLE
Halley
Globe
Mfrokigi
Africa
Carce
Terra Australis
America
Egypt