[75] Op. cit., vol. i. p. 200.
[76] Theory of the Earth, vol. ii. p. 205.
[77] Op. cit., vol. i. p. 44.
[78] Illustrations of the Huttonian Theory, § 118.
[79] Trans. Roy. Soc. Edin., vol. xxiii. (1862).
[80] Proc. Roy. Soc. Edin., vol. v. p. 512 (Dec. 18, 1865).
[81] Trans. Geol. Soc. Glasgow, vol. iii. (February, 1868), pp. 1, 16.
[82] 'The Age of the Earth,' being the Annual Address to the Victoria Institute, June 2, 1897. Phil. Mag., January, 1899, p. 66.
[83] Recent Advances in Physical Science, p. 174.
[84] Presidential Address. Quart. Journ. Geol. Soc., 1869.