^{Page 500 note 1} Steele, op. cit., lviii.

^{Page 500 note 2} Thorndike, op. cit., ii, 265.

^{Page 500 note 3} p. 140.

^{Page 500 note 4} p. 132.

^{Page 500 note 5} The Treatise of Walter de Milemete … et De Secretis Secretorum Aristotelis, 1913, pl. 151.

^{Page 501 note 1} Or. 3118, fols. 52v–53 (called “ C ”), and Or. 6421, fol. 99 (called “ D ”).

^{Page 501 note 2} MS. “ D ” begins .

^{Page 501 note 3} “ D ” has and .

^{Page 501 note 4} “ C ” has = “ terrifying ”. See the Latin version of Bacon. as in “ D ”, agrees with the Hebrew “ hydraulic (?) instruments ”. See the Hebrew text in JBAS., 1907.

^{Page 501 note 6} “ D ”

^{Page 501 note 6} In “ C ” after the passage runs .

^{Page 501 note 7} omitted in “ D ”.

^{Page 501 note 8} Roger Bacon has ad nocendum, which Steele suggests is a mistake for advocandum, as in the Holkham Hall MS.

^{Page 502 note 1} By the courtesy of the Trustees of the British Museum.

^{Page 502 note 2} Al-Ma riq, ix, 21.

^{Page 502 note 3} Both the Arabs and Syrians likened this ar(c)a to an “ oven ” (tannūr).

^{Page 503 note 1} These “ Greek bellows ” are called zauqī bellows in the Arabic version of Philōn's Pneumatics. Since and are much alike in appearance, one may be a copyist's error for the other.

^{Page 503 note 2} Al-Fihrist, 270. Ibn al-Qifṭī, 322. Abūl-Fidā, 156.

^{Page 503 note 3} Pape, Wörterbuch, s.v. I am indebted for this “ clue ” to Professor D. S. Margoliouth.

^{Page 503 note 4} Revue des Etudes Grecques, xxi, 338–40. Notices et Extraits des MSS., xxxviii, 29, 38. Journal Asiatique, ser. XI, Tome x, 450.