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“[...] according to Ptolemy and Alfraganus, the Earth rotates 24,000 miles, or 6,000 leagues [33,000 km]: which, divided by 360 degrees, makes each degree equal 162/3 leagues [92.5 km]. I verified this calculation many times with the pilots’ charting, and found it to be sound and true.”
Amerigo Vespucci to Lorenzo di Pierfrancesco de’ Medici, July 18, 1500