I. C. Russell. Pelée Obelisk once More, ibid., vol. 21, 1905, pp. 924-931.

The dissection of volcanoes:—

J. W. Judd. Volcanoes, Chapter v.

S. Sekya and Y. Kikuchi. The Eruption of Bandai-San, Trans. Seis. Soc., Japan, vol. 13, Pt. 2, 1890, pp. 140-222, pls. 1-9.

R. D. M. Verbeek. Krakatau. Batavia, 1885, pp. 557, pls. 25.

Royal Society. The Eruption of Krakatoa and Subsequent Phenomena. London, 1888, pp. 494.

G. K. Gilbert. Report on the Geology of the Henry Mountains, U.S. Geogr. and Geol. Surv., Rocky Mt. Region, Washington, 1877, pp. 22-60.

Sir A. Geikie. Ancient Volcanoes of Great Britain, vol. 2 especially.

D. W. Johnson. Volcanic Necks of the Mount Taylor Region, New Mexico, Bull. Geol. Soc. Am., vol. 18, 1907, pp. 303-324, pls. 25-30.