[284] Capt. Bayfield, Geol. Soc. Proceedings, vol. ii. p. 223.
[285] M. Arago, Annuaire, &c. 1833; and Rev. J. Farquharson, Phil. Trans. 1835, p. 329.
[286] Journ. of Roy. Geograph. Soc. vol. vi. p. 416.
[287] See Système Glaciaire, by Agassiz, Guyot, and Desor, pp. 436, 437, 445. Mr. Agassiz, at p. 462, states that he published in the Deutsche Vierteljahrschrift for 1841, this result as to the central motion being greater than that of the sides, and was, therefore, the first to correct his own previous mistake.
[288] J. Forbes. 8th Letter on Glaciers, Aug. 1844.
[289] See Mr. Hopkins on Motion of Glaciers, Cambridge Phil. Trans. 1844, and Phil. Mag. 1845. Some of the late concessions of this author as to a certain plasticity in the mass, appear to me to make the difference between him and Professor Forbes little more than one of degree. (For the latest summary of Prof. Forbes' views, see Phil. Trans. 1846, pt. 2.)
[290] This experiment is cited by Mr. Forbes, Phil. Trans. 1846, p. 206; and I have conversed with Mr. Christie on the subject.
[291] Etudes sur les Glaciers, 1840.
[292] See Manual of Geol. ch. xi.
[293] Agassiz, Jam. Ed. New Phil. Journ. No. 54, p. 388.