[246] Arnobio, “Il tesoro delle gioie,” Venice, 1602, p. 34.

[247] See the English translation of his “Chu-fan-chï,” by Friedrich Hirth and W. W. Rockhill, St. Petersburg, 1911, p. 72.

[248] “Die Reisebeschreibung des R. Benjamin von Tudela,” ed. by L. Grünhut and Marcus N. Adler, Jerusalem, 1903, pt. ii, trans., p. 17.

[249] Beckmann, “History of Inventions,” English trans., London, 1846, vol. ii, p. 433.

[250] Garcias ab Orta, “Aromatum historia” (Lat. version by Clusius), Antverpiæ, 1579, lib. i, p. 174.

[251] Plinii, “Naturalis historia,” lib. xxxvii, cap. 17.

[252] Platonis, “Hippias major,” ed. Didot, vol. i, p. 745.

[253] Norton’s “Ordinall”; in Ashmole “Theatrum Chemicum Britannicum,” London, 1652, p. 27.

[254] Christiani Mentzelli, “Lapis Bononensis,” Bilefeldiæ, 1675.

[255] See Kunz, “The Phosphorescence of the Diamond,” Trans. N. Y. Academy of Sciences, vol. x, p. 50, 1890-91; Kunz and Baskerville, “The Action of Radium, Actinium, Roentgen rays, and Ultra Violet Light in Minerals and Gems,” Science, vol. xviii, No. 468, pp. 769-783, December 18, 1903.