Note 325 — Chapter I
Reading edition
The result of the Arabian measurements gave 56⅔3 miles to a degree. Arabian miles were meant, and as these contain, according to Peschel (Geschichte der Geographie, p. 134) 4,000 ells of 540.7mm., the degree equalled 122,558.6m. The Europeans, however, thought that Roman miles were meant, and so got but 83,866.6m. to a degree.