Footnote 28: Bolton, “Contributions of Alchemy to Numismatics,” New York, 1890, pp. 17, 18. Footnote 29: Ashmole, “Theatrum chemicum Brittanicum,” London, 1652, pp. 4–6. Footnote 30: Spencer and Gillen, “The Native Tribes of Central Australia,” London, 1899, pp. 525–529. Footnote 31: Rumphius, “D’Ambonische Rariteitskamer,” Amsterdam, 1741, p. 291. Footnote 32: Rumphius, “D’Ambonische Rariteitskamer,” Amsterdam, 1741, pp. 291, 292. Footnote 33: Vogt, “Die Indianer des oberen Paraná,” Mitteilungen d. Anthrop. Gesellsch. in Wien, 1904, vol. xxxiv, pp. 206, 207. Footnote 34: Hovorka and Kronfeld, “Vergleichende Volksmedizin,” vol. 11, p. 900; communication from Dr. Rudolf Pöch. Footnote 35: Benvenuto Cellini, “Due trattati, uno intorno alle otto principali arti dell’oreficeria,” etc., Fiorenzi, Valente Panizzi & Marco Peri, 1568, fol. 10 recto. Footnote 36: Axel Garboe, “Kulturhistoriske Studier over Ædelstene, med særligt Henblik paa det 17. Aarhundrede,” Kobenhavn og Kristiania, 1915, p. 225; citing a manuscript in the Royal Library at Copenhagen. Footnote 37: See Herbert E. Gregory, “Note on the Shape of Pebbles,” in The American Journal of Science, vol. xxxix, pp. 300–304; March, 1915; also for two succeeding paragraphs. Footnote 38: See Herbert E. Gregory, “Note on the Shape of Pebbles,” in The American Journal of Science, vol. xxxix, pp. 303, 304; March, 1915. Footnote 39: W. G. Wood-Martin, “Traces of the Elder Faiths of Ireland,” London, 1902, vol. i, p. 329. Footnote 40: Ibid., 1902, vol. i, op. cit., p. 330. Footnote 41: Nona Lebour, “White Quartz Pebbles and their Archæological Significance”; reprint from Transactions of the Dumfriesshire and Galloway Natural History and Antiquarian Society, January 30, 1914, p. 11. Footnote 42: Ibid., pp. 13 and 14, citing Proceedings of the Society of Antiquaries of Scotland, 1860–1, vol. iv, pt. i, p. 219. Footnote 43: Ibid., p. 12, citing Proceedings of the Society of Antiquaries of Scotland, 1860–1, vol. iv, pt. i, p. 219. Footnote 44: William Thomas and Kate Pavitt, “The Book of Talismans, Amulets and Zodiacal Gems,” London, 1914, p. 52. Footnote 45: From letter of Mr. Neil M. Judd, Assistant in Archæology in the United States National Museum, communicated by Dr. W. H. Holmes, Head Curator of the Department of Anthropology in that institution. Footnote 46: Communicated by Dr. Charles C. Abbott. Footnote 47: Warren K. Moorehead, “The Red-Paint People of Maine,” pp. 42, 43. Reprint from the _American Anthropologist_ (N. S.), vol. xv, No. 1, January-March, 1913. Footnote 48: See the present writer’s “Gems and Precious Stones of North America,” New York, 1892, p. 128. Footnote 49: See N. F. Moore, “Antient Mineralogy,” 2d ed., New York, 1859, p. 190. Footnote 50: