[155] Prof. Whitney, “Language and the Study of Language,” 1867, p. 259.

[156] Humboldt’s “Cosmos,” ii., pt. ii. p. 523, Bohn’s ed.

[157] Plutarch, “Alexander,” 35.

[158] Humboldt, ib.

[159] “Le mot χαλκος et le mot æs en latin comprennaient à la fois le cuivre et ses alliages colorés en rouge ou en jaune.”—Berthelot, ii. 122 n.

[160] “Golden Prairies,” Paris ed., iii. 49.

[161] Chrestomathie Arabe, iii. 456.

[162] Berthelot, i. 306.

[163] Rāy’s “Hindu Chemistry,” p. 50.

[164] Chrestomathie Arabe, ii. 482.