Principles of Geology / or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology

by Sir Charles Lyell

[314] See Glossary, "Tufa," "Travertin."

[315] Dr. Grosse on the Baths of San Filippo, Ed. Phil. Journ. vol. ii p. 292.

[316] Consolations in Travel, pp. 123-125.

[317] Ibid. p. 127.

[318] C. Prevost, Essai sur la Constitution Physique du Bassin de Vienne, p. 10.

[319] Travels across the Andes, p. 240.

[320] Annalen der Chem. 1847.

[321] Daubeny on Volcanoes, p. 222.

[322] Dr. Webster on the Hot Springs of Furnas, Ed. Phil. Journ. vol. vi. p. 306.

[323] See a cut of the Icelandic geyser, chap. 32.