[24] Outlines of the Geology of England and Wales, p. xliv.
[25] Illustrations of the Huttonian Theory, p. iii.
[26] Edinb. Rev. LXIX. (July 1839), p. 455 note.
[27] Ibid.
[28] Zittel, Hist. of Geol. &c. Eng. transl. p. 141.
[29] Considerations on Volcanoes, &c. (1825), pp. iv-vi.
[30] Volcanoes of Central France, 2nd Ed. (1858), p. vii.
[31] See Quart. Rev. Vol. XXXVI. (Oct. 1827), pp. 437-485.
[32] L.L.L. Vol. I. p. 46.
[33] Principles of Geology, Vol. II. 2nd Ed.