^{page 489 note *} Essai Géologique sur L'Écosse, (circa 1820), pp. 127 and 157.

^{page 489 note †} A Description of the Western Isles of Scotland, 1819, vol. i, p. 504Google Scholar.

^{page 489 note ‡} Geology of Fife and the Lothians, 1st ed., 1839, pp. 171–173Google Scholar; and 2nd ed., 1866, pp. 234–236.

^{page 490 note *} Quart. Journ. Geol. Soc., 1874, vol. xxx, p. 555Google Scholar.

^{page 490 note †} Trans. Roy. Soc. Edin., 1879, vol. xxix, p. 517Google Scholar.

^{page 490 note ‡} British Petrography, 1888, p. 190.

^{page 490 note §} “The Neighbourhood of Edinburgh,” Mem. Geol. Surv. Scotland, 1910, p. 291.

^{page 490 note ∥} Trans. Edin. Geol. Soc., 1920, vol. xi, pp. 16–17Google Scholar.

^{page 490 note ¶} Ibid., 1920, vol. xi, pp. 51–53 and 128–130.

^{page 490 note **} Min. Mag., vol. xx, 1925, p. 435–440Google Scholar.

^{page 493 note *} Loc. cit., p. 439.

^{page 493 note †} Trans. Edin. Geol. Soc., 1920, vol. xi, p. 17Google Scholar.

^{page 493 note ‡} Geology of Fife and the Lothians, 1st ed., 1839, p. 171Google Scholar; and 2nd ed., 1866, p. 234.

^{page 493 note §} “The Neighbourhood of Edinburgh,” Mem. Geol. Surv. Scotland, 1910, pp. 314 and 315.

^{page 493 note ∥} Trans. Edin. Geol. Soc., 1920, vol. xi, pt. i, pp. 51–53Google Scholar; and 1923, vol. xi, pt. ii, pp. 128–130.

^{page 494 note *} Information obtained from records in Geological Survey Office, Edinburgh.

^{page 494 note †} Geological Survey 6-inch Map, Edinburghshire, Sheet 5, S.E.

^{page 495 note *} “The Geology of the Neighbourhood of Edinburgh,” Mem. Geol. Surv., 1910, p. 292.

^{page 495 note †} Tertiary and Post-Tertiary Geology of Mull,” ibid., 1924, p. 280.

^{page 495 note ‡} Op. cit., p. 303.

^{page 497 note *} Quart. Journ. Geol. Soc., vol. xxx, 1874, p. 549, and pl. xxxiv, fig. 28Google Scholar.

^{page 497 note †} British Petrography, 1888, p. 212, and pl. xxiii, fig. 2.

^{page 498 note *} Min. Mag., vol. xx, 1925, p. 436Google Scholar.

^{page 498 note †} Characteristics of Volcanoes, 1890, pp. 324–326.

^{page 498 note ‡} “Uber die Mineralbildung in Silikatschmelzlösungen,” Videnskabs-Selskabets Skrifter. I. Math.-naturv. Klasse., 1903, p. 112.

^{page 500 note *} Quart. Journ. Geol. Soc., vol. liii, 1897, p. 487Google Scholar.

^{page 500 note †} Compare Wadia, D. N., “Palagonite-bearing Dolerite from Nagpur,” Rec. Geol. Surv., India, vol. lviii, 1925, p. 342Google Scholar; and L. L. Fermor, “On the Basaltic Lavas penetrated by the deep boring for Coal at Bhusawal, Bombay Presidency,” ibid., p. 133.

^{page 500 note ‡} “The Basalt of Bolshezemelsck tundra,” Trav. Musée Géol. Pierre le Orand, Acad. Sci. St Pétersburg, vol. iv, 1911, pp. 75–97Google Scholar.

^{page 500 note §} Min. Mag., vol. xxi, 1926, pp. 73–82Google Scholar.

^{page 500 note ∥} Washington, H. S., “Chemical Analyses of Igneous Rocks,” U.S. Geol. Surv., Prof. Paper, 99, 1917, p. 888Google Scholar.

^{page 501 note *} Op. cit., Mem. Geol. Surv., 1908, pp. 130–131.

^{page 501 note †} “Tertiary and Post-Tertiary Geology of Mull,” ibid., 1924, p. 26.

^{page 503 note *} “Tertiary and Post-Tertiary Geology of Mull,” Mem. Geol. Surv., 1924, p. 19.

^{page 503 note †} “The Neighbourhood of Edinburgh,” ibid., 1910, pp. 298 and 307.

^{page 503 note ‡} Ibid., 1910, pp. 292–3.