[76] G. Coffey, The Bronze Age in Ireland, 1913, p. 6.
[77] L'Anthropologie, 1896, p. 526 sq. This antiquary aptly remarks that "l'expression âge de cuivre a une signification bien précise comme s'appliquant à la partie de la période de la pierre polie où les métaux font leur apparition."
[78] L'Anthropologie, 1896, p. 526 sq.
[79] In Die Kupferzeit in Europa, 1886.
[80] "Neuere Studien über die Kupferzeit," in Zeitschr. f. Eth. 1896, No. 2.
[81] Otto Helm, "Chemische Untersuchungen vorgeschichtlicher Bronzen," in Zeitschr. f. Eth. 1897, No. 2. This authority agrees with Hampel's view that further research will confirm the suggestion that in Transylvania (Hungary) "eine Kupfer-Antimonmischung vorangegangen, welche zugleich die Bronzekultur vorbereitete" (ib. p. 128).
[82] Proc. Soc. Bib. Archaeol. 1892, pp. 223-6.
[83] For the chronology of the Copper and Bronze Ages see p. 27.
[84] Copper and tin are found together in abundance in Southern China, but this is archaeologically speaking an unknown land; "to search for the birth-place of bronze in China is therefore barren of positive results," British Museum Guide to the Antiquities of the Bronze Age, 1904, p. 10.
[85] T. Rice Holmes, Ancient Britain, 1907, pp. 483-498.