[14] Brit. Assoc. Rep. 1866 (Nottingham).
[15] H.C.E. Vol. VIII. p. 315.
[16] Ibid. p. 190.
[17] D.L.L. Vol. II. pp. 179-204.
[18] H.C.E. Vol. V. p. 101.
[19] D.L.L. Vol. II. p. 190.
[20] Edinb. Rev. Vol. LXIX. (July 1839), p. 455 note.
[21] 'Theory of the Earth,' Vol. II. p. 67.
[22] L.L.L. Vol. I. p. 272.
[23] Brit. Assoc. Rep. 1833 (Cambridge), pp. 365-414.