[62] Compte Rendu, 1873, part ii. p. 66.
[63] Die Vulcan. Ers. d. Erde, C. W. C. Fuchs.
[64] Comte Rendu, 1875, p. 693.
[65] Gent. Mag. vol. xix. p. 190.
[66] Phil. Trans. vol. xlix. p. 115.
[67] Gent. Mag. vol. xxi. 1751.
[68] Jour. Royal Geo. Soc. vol. vi. p. 319.
[69] Darwin, Geolog. Observations, p. 232.
[70] Ibid. p. 245.
[71] Lyell, Principles of Geology, vol. ii. pp. 107–8.