Plinii, “Naturalis historia,” Lib. xxxvii, cap. 59. Footnote 6: De Mély, in La Grande Encyclopédie; art. pierres précieuses. Footnote 7: Conradi Gesneri, “De rerum fossilium,” etc., Tiguri, 1565, fol. 49 verso. Footnote 8: Giovanni B. Rampolli, “Annali Musulmani,” vol. ix, Milano, 1825, p. 481, note 75. Footnote 9: “Exposition de ce qu’il y a de plus remarquable et des merveilles,” by Abdorrashish, surnamed Yakuti, a geographical work of the fifteenth century, transl. into French and published in Notices et Extraits des Manuscrits de la Bibliothèque du Roi, vol. ii, pp. 452, 520, 534; Paris, 1789. Footnote 10: F. Stuhlmann, “Mit Emin Pascha im Herz von Africa,” Berlin, 1894, p. 588. Footnote 11: S. Gason, “The Dieyeric Tribe” in “Native Tribes of South Australia,” pp. 276 sqq.; see also: A. W. Howitt, “The Dieri and Other Kindred Tribes of Central Australia.” Footnote 12: H. L. P. Cameron, “Notes on Some Tribes of New South Wales.” Journ. of Anthrop. Inst., vol. xiv (1885), p. 362. Footnote 13: J. L. van der Toorn, “Het animisme bij den Minangkabaner der Padangsche Bovenland, Bijdragen tot de Taal-Land-en Volkerkunde van Nederlandsch Indie,” vol. xxxix, 1890, p. 86. Footnote 14: Martin, “Description of the Western Islands of Scotland,” in Pinkerton’s “Voyages and Travels,” vol. iii, p. 594. Footnote 15: See Pinder, “De adamante,” Berolini, 1829, pp. 70 sqq., where the use of the word _adamas_ to designate iron is said to have been conjectured by Schneider, in his “Analecta ad hist. rei met. vet.,” pp. 5, 6. Adamas as a man’s name occurs in the “Iliad,” xii, 140 and xiii, 560. Footnote 16: Julius Ruska, “Das Steinbuch aus der Kosmographie des Muhammad ibn Mahmud al Kazwini,” Beilage to the Jahresbericht of the Oberrealschule Heidelberg, 1895–96. Footnote 17: Camilli Leonardi, “Speculum lapidum,” Venetia, 1502, fol. xxix. Footnote 18: Philostrati, “Vita Apollonii,” Lib. iii, cap. 8. Footnote 19: “The Questions of King Milinda,” trans. by T. W. Rhys Davids; Sacred Books of the East, vol. xxxvi, Oxford, 1894, pp. 14, 303. Footnote 20: Traité des Simples of Ibn Al-Beithar, in Notices et Extraits des Manuscrits de la Bibliothèque Nationale, vol. xxiii, p. 409; Paris, 1877. Footnote 21: De Mély, “Le traité des fleuves de Plutarche,” in Revue des Études Grecques, vol. v (1892), p. 332. Footnote 22: Konrad von Megenberg, “Buch der Natur,” ed. by Dr. Franz Pfeiffer, Stuttgart, 1861, p. 456. Footnote 23: Volmar, “Steinbuch,” ed. by Hans Lambel, Heilbronn, 1877, p. 24. Footnote 24: St. Hildegardæ, “Opera omnia,” in Pat. Lat., ed. J. P. Migne, vol. cxcvii, col. 1260. Footnote 25: D’Herbelot, “Bibliothèque Orientale,” La Haye, 1778, p. 230. Footnote 26: Clouston, “A Group of Eastern Romances,” Glasgow, 1889. Footnote 27: “Nützliche Versuche und Bemerkungen aus dem Reich der Natur,” Nürnberg, 1760; cited by Bolton.