Note 50 — Chapter II

The only branch of knowledge which the Arabians ever raised to a science was astronomy, which began to be cultivated under the caliphs about the middle of the eighth century, and went on improving until ‘la ville de Bagdad fut, pendant le dixième siècle, le théâtre principal de l'astronomie chez les orientaux.’ Montucla, Histoire des Mathématiques, vol. i. pp. 355, 364. The old Pagan Arabs, like most barbarous people living in a clear atmosphere, had such an empirical acquaintance with the celestial phenomena as was used for practical purposes; but there is no evidence to justify the common opinion that they studied this subject as a science. Dr. Dorn (Transactions of the Asiatic Society, vol. ii. p. 371) says, ‘of a scientific knowledge of astronomy among them no traces can be discovered.’ Beausobre (Histoire de Manichée, vol. i. p. 20) is quite enthusiastic about the philosophy of the Arabs in the time of Pythagoras! and he tells us, that ‘ces peuples out toujours cultivé les sciences.’ To establish this fact, he quotes a long passage from a life of Mohammed written early in the eighteenth century by Boulainvilliers, whom he calls, ‘un des plus beaux génies de France.’ If this is an accurate description, those who have read the works of Boulainvilliers will think that France was badly off for men of genius; and as to his life of Mohammed, it is little better than a romance: the author was ignorant of Arabic, and knew nothing which had not been already communicated by Maracci and Pococke. See Biographie Universelle, vol. v. p. 321.

In regard to the later Arabian astronomers, one of their great merits was to approximate to the value of the annual precession much closer than Ptolemy had done. See Grant's History of Physical Astronomy, 1852, p. 319.