[176] Science, vol. iv, No. 82, pp. 172, 173, with cut of the ring; vol. iv, No. 85, pp. 270, 271, communication by Edward S. Morse on the subject; vol. vi, No. 126, July 3, 1885, reply of George F. Kunz, citing letter of Lieut. G. C. Foulke, U.S.N., of U. S. Legation at Seoul, Corea. [177] Communicated by Stewart Culin, Brooklyn Institute. [178] Heinrich Fischer, “Nephrit und Jadeit,” Stuttgart, 1880, pp. 39, 334, fig. 52 on page 39. [179] George H. Pepper, “The Exploration of a Burial Room in Pueblo Bonito, New Mexico,” Putnam Anniversary Volume, New York, 1909, p. 244, fig. 7. [180] F. H. Marshall, “Catalogue of the Finger Rings, Greek, Etruscan and Roman, in the ... British Museum,” London, 1907, p. xxxii. [181] A natural or artificial mixture of gold and silver found native at Vorospotak, Transylvania, and elsewhere, mentioned by Herodotus. The electros, ἧλεκτρος, of Homer and Strabo; Pliny, xxxiii, 23; although this word was most frequently used to designate amber. Varying in specific gravity from 15.5 to 12.5. The ratio of gold to silver is 1:1. Specific gravity of gold, 19.33; silver, pure, 10.5; correspond to 35.3 per cent. of silver, gold 64.7 per cent. Pliny states that when the proportion of silver to gold is 1:4 (20 per cent.), it is called electra. [182] Corpus Inscriptionum Atticarum, ii (5), 767 b, 1, 19. [183] J. H. Marshall, “Catalogue of the Finger Rings, Greek, Etruscan and Roman, in the ... British Museum,” London, 1907, p. xxxi. [184] “Heliodorou Aithiopikôn, biblia deka,” Parisiois, 1804, pt. i, pp. 190–192. [185] C. W. King, “The Natural History of Precious Stones and Gems,” London, 1865, p. 64. [186] F. H. Marshall, “Catalogue of the Finger Rings, Greek, Etruscan, and Roman, in the Departments of Antiquities, British Museum,” London, 1907, pp. xxxv, xxxvi. [187] “Cimeliotheca Musei Nationalis Hungarici sive catalogus historico-criticus antiquitatum raritatum et pretiosorum eius instituti,” Budæ, 1825, p. 136. [188] Francis Cohen, “St. Martin’s rings,” Archæologia, vol. xviii, pt. i, London, 1815, pp. 55, 56. [189] Communicated by Prof. A. V. Williams Jackson, of Columbia University, who cites G. B. Browne’s “Literary History of Persia” (London and New York, 1906), vol. ii, p. 123, note 3, and Louisa Stuart Costello, “Rose Garden of Persia,” London, 1887, p. 33. [190] British Museum, Fourth Egyptian Room, No. 201 (Table Case J). [191] British Museum, Fourth Egyptian Room, No. 202. [192] British Museum, Fourth Egyptian Room, No. 204. [193] British Museum, Fourth Egyptian Room, No. 217. [194] W. M. Flinders Petrie, “A History of Egypt During the XVII and XVIII Dynasties,” London, 1904, pp. 9, 10. [195] W. M. Flinders Petrie, “A History of Egypt from the Earliest Times to the XVI Dynasty,” New York, 1895, p. 42. [196] New York Historical Society, “Catalogue of Egyptian Antiquities,” New York, 1915, p. 63; No. 1046, figs. 1, 2 and 3.