[21] Huart, History of Arabic Literature, English ed., New York, 1903, p. 182 seq.
[22] Al-Mas‛ūdī's Meadows of Gold, translated in part by Aloys Sprenger, London, 1841; Les prairies d'or, trad. par C. Barbier de Meynard et Pavet de Courteille, Vols. I to IX, Paris, 1861-1877.
[23] Les prairies d'or, Vol. VIII, p. 289 seq.
[24] Essays, Vol. II, p. 428.
[25] Loc. cit., p. 504.
[26] Matériaux pour servir à l'histoire comparée des sciences mathématiques chez les Grecs et les Orientaux, 2 vols., Paris, 1845-1849, pp. 438-439.
[27] He made an exception, however, in favor of the numerals, loc. cit., Vol. II, p. 503.
[28] Bibliotheca Arabico-Hispana Escurialensis, Madrid, 1760-1770, pp. 426-427.
[29] The author, Ibn al-Qifṭī, flourished A.D. 1198 [Colebrooke, loc. cit., note Vol. II, p. 510].
[30] "Liber Artis Logisticae à Mohamado Ben Musa Alkhuarezmita exornatus, qui ceteros omnes brevitate methodi ac facilitate praestat, Indorum que in praeclarissimis inventis ingenium & acumen ostendit." [Casiri, loc. cit., p. 427.]