Note 363 — Chapter III · THE CONTRIBUTION OF THE MOSLEMS
Reading edition
Reinaud, Géogr. d’Aboulféda, vol. i, 1848, pp. ccxxxiii-ccxlvi. 396Schoy, Längenbestimmung, 1915, pp. 45–57, discusses the question of the origins of the use of a central meridian for the measurement of longitude.