TH. THORODDSEN. Die Bruchlinien und ihre Beziehungen zu den Vulkanen, Pet. Mitt., vol. 51, 1905, pp. 1-5, pl. 5. R. D. M. VERBEEK. Various volumes and atlases of maps covering the Dutch East Indies and fully cited in the following reference (p. 21). WILLIAM H. HOBBS. The Evolution and the Outlook of Seismic Geology, Proc. Am. Phil. Soc., vol. 48, 1909, pp. 17-27. Birth of volcanoes:— F. OMORI. The Usu-san Eruption and Earthquake and Elevation Phenomena, Bull. Earthq. Inv. Com., Japan, vol. 5, No. 1, 1911, pp. 1-37, pls. 1-13. Fissure eruptions:— TH. THORODDSEN. Island, IV, Vulkane, Pet. Mitt., Ergänzungsh. 153, 1906, pp. 108-111. A. GEIKIE. Text-book of Geology, 4th ed., pp. 342-346. Lava domes of Hawaii:— J. D. DANA. Characteristics of Volcanoes (as above). C. H. HITCHCOCK. Hawaii and Its Volcanoes. Honolulu, 1909, pp. 314. Eruption of Matavanu volcano in 1906:— KARL SAPPER. Der Matavanu-Ausbruch auf Savaii, 1905-1906, Zeit. d. Gesell. f. Erdk. z. Berlin, vol. 19, 1906, pp. 686-709, 4 pls. H. J. JENSEN. The Geology of Samoa, and the Eruptions in Savaii, Proc. Linn. Soc., New South Wales, vol. 31, 1906, pp. 641-672, pls. 54-64. TEMPEST ANDERSON. The Volcano of Matavanu in Savaii, Quart. Jour. Geol. Soc., London, vol. 66, 1910, pp. 621-639, pls. 45-52. Eruption of Volcano in 1888:— H. J. JOHNSTON-LAVIS. The South Italian Volcanoes. Naples, 1891, pp. 342, pls. 16. Eruption of Taal volcano in 1911:— W. E. PRATT. The Eruption of Taal Volcano, January 30, 1911, Phil. Jour. Sci., vol. 6, No. 2, Sec. A, 1911, pp. 63-86, pls. 1-14. F. H. NOBLE. Taal Volcano, album of views of 1911 eruption, Manila, 1911, pp. 1-48. The volcano of Etna:— G. VOM RATH. Der Aetna. Bonn, 1872, pp. 1-33. (A beautiful piece of descriptive writing from both the geological and scenic standpoints.) SARTORIUS VON WALTERSHAUSEN. Der Aetna. Leipzig, 1880, 2 quarto vols., pp. 371 and 548. The eruption of Vesuvius in 1906:— H. J. JOHNSTON-LAVIS. Geological Map of Monte Somma and Vesuvius, with a short and concise account, etc. Geo. Philip & Son, London, 1891. H. J. JOHNSTON-LAVIS. The Eruption of Vesuvius in April, 1906, Trans. Roy. Dublin Soc., vol. 9, 1909, Pt. VIII, pp. 139-200, pls. 3-23 (the most authoritative work upon the subject). T. A. JAGGAR, JR. The Volcano Vesuvius in 1906, Tech. Quart., vol. 19, 1906, pp. 105-115. W. PRINZ. L’éruption du Vesuv d’avril, 1906, Ciel et Terre, 27e Année, 1906, pp. 1-49. FRANK A. PERRET. Notes on the Electrical Phenomena of the Vesuvian Eruption, April, 1906, Sci. Bull., Brooklyn Inst. Arts and Sci., vol. 1, No. 11, pp. 307-312; Vesuvius, Characteristics and Phenomena of the Present Repose Period, Am. Jour. Sci., vol. 28, 1909, pp. 413-430. WILLIAM H. HOBBS. The Grand Eruption of Vesuvius in 1906, Jour. Geol., vol. 14, 1906, pp. 636-655. The spine of Pelée:—