[498] L’ottica di Claudio Tolomeo da Eugenio ammiraglio di Sicilia ridotta in latino, ed. Gilberto Govi, Turin, 1885.
[499] Schmid (1913) still cites it without qualification. Hammer-Jensen has an article, Ptolemaios und Heron, in Hermes, XLVIII (1913) 224, et seq.
[500] Haskins and Lockwood, The Sicilian Translators of the Twelfth Century, in Harvard Studies in Classical Philology, XXI (1910), 89.
[501] Ibid., 89-94.
[502] A. Heller, Geschichte der Physik von Aristoteles bis auf die neueste Zeit, 2 vols., Stuttgart, 1882-1884. The statement sounds a trifle improbable in view of the number of MSS still in existence.
[503] Opus Maius, II, 7.
[504] The Dioptra of Hero is really geodetical.
[505] Govi (1885), p. 151.
[506] Ptolemy in Smith’s Dictionary of Greek and Roman Biography.
[507] It was also so printed in Sphera cum commentis, 1518: “Explicit secundus et ultimus liber Ptolomei de Speculis. Completa fuit eius translatio ultimo Decembris anno Christi 1269.”