[2] Conybeare and Phil. Geol., p. 401, and Farey’s Derbyshire, p. 243.

[3] Fournet, Études sur les Dépôts Métallifères.

[4] Carne, Trans. Geol. Soc., Cornwall, vol. iii, p. 238.

[5] Geol. Rep. on Cornwall, p. 340.

[6] Principles, chap. xxvii, 8th edit., p. 422.

[7] See Dr. Daubeny’s Volcanoes.

[8] Bulletin, iv, p. 1278.

[9] Sir H. De la Beche, MS. Notes on Irish Survey.

[10] Report on Geology of Cornwall, p. 310.

[11] Darwin’s South America, p. 209, etc.