a liquid to a solid state by radiation of heat, the central
nucleus must have begun to cool and consolidate first.

[755] Consolations in Travel, p. 271.

[756] Phil. Trans. 1830, p. 399.

[757] Biblioth. Univers. 1833, Electricita.

[758] Phil. Trans. 1832, p. 176; also pp. 172, 173, &c.

[759] Hist. Mundi, lib. ii. c. 107.

[760] Reduced, by permission, from a figure in plate 40 of Sir
H. De la Beche's Geological Sections and Views.

[761] Phil. Trans. 1828, p. 250.

[762] Geology of American Exploring Expedition, p. 369.

[763] Davy, Phil. Trans. 1828, p. 244.

[764] Ann. de Chim. et de Phys. tom. iii. p. 181.

[765] Phil. Trans. 1832, p. 240.

[766] Ann. de Chim. et de Phys. tom. xxii.

[767] Quart. Journ. of Sci. 1823, p. 132, note by editor.

[768] Phenom. Gaol. &c. p. 3.

[769] Phil. Trans. 1828.

[770] See Daubeny, Encyc. Metrop. part 40.

[771] Jam. Ed. New Phil. Journ. No. li. p. 31.

[772] See Daubeny's Reply to Bischoff, Jam. Ed. New Phil.
Journ. No. lii. p. 291; and note in No. liii. p. 158.

[773] Poggend. Ann. 1851 translated, Sci. Mem. 1852.

[774] Proceed. Americ. Assoc. 1849.

[775] Reduced from a sketch given by Sir W. J. Hooker, in his
Tour in Iceland, vol. i. p. 149.

[776] Journal of a Residence in Iceland, p. 74.

[777] Mackenzie's Iceland.

[778] MS. read to Geol. Soc. of London, Feb. 29, 1832.

[779] From Sir George Mackenzie's Iceland.

[780] See Mr. Horner's Anniversary Address, Quart. Journ.
Geol. Soc. 1847, liii.

[781] Liebig's Annalen der Chimie und Pharmacie, translated in
"Reports and Memoirs" of Cavendish Soc. London, 1848.

[782] On the Cause and Phenomena of Earthquakes, Phil. Trans.
vol. li. sec. 58, 1760.

[783] Trans. of Assoc. of American Geol. 1840-1842, p. 520.

[784] Mallet, p. 39.

[785] Scrope on Volcanoes, pp. 58-60.

[786] Archiac, Hist, des Progras de la Gaol, 1847, vol. i. pp.
605-610.

[787] Silliman's American Journ. vol. xxii. p. 136. The
application of these results to the theory of earthquakes was
first suggested to me by Mr. Babbage.

[788] Bulletin de la Soc. Gaol. 2d series, vol. iv. p. 1312.

[789] See p. 468.

[790] Phil. Zool. tom. i. p. 84.

[791] Phil. Zool. tom. i. p. 62.

[792] Ibid.

[793] Phil. Zool. tom. i. p. 227.

[794] Ibid. p. 232.