[76] Daly, "Mechanism of igneous intrusion," Am. Journ. Sci., Ser. 4, 15 (1903), 269, and later.
[77] For a recent review in favour of this theory, see Loewinson Lessing, "The fundamental problems of Petrogenesis," Geol. Mag. (1911), 248 and 289.
[78] Darwin, "Geological Observations on volcanic islands" (1844), chap. VI.
[79] Brögger, "Die Eruptivgesteine des Kristianiagebietes" (1894 &c.).
[80] Harker, op. cit., [ref. 58], chaps. XIII and XIV.
[81] Daly, "Origin of the alkaline rocks," Bull. Geol. Soc. Am., 21 (1910), 108, and "Magmatic differentiation in Hawaii," Journ. Geol., 19 (1911), 309. See, however, H. I. Jensen, as to primitive accumulation of alkalies in the upper layers; "The distribution of Alkaline Rocks," Proc. Linn. Soc. N. S. W., 33 (1908), 521.
[82] Schwarz, "Causal Geology" (1910).
[83] Doelter, op. cit., [ref. 69], pp. 71-213.
[84] Judd, "On Tertiary gabbros &c.," Q. Journ. Geol. Soc., 42 (1886), 54.
[85] Harker, op. cit., [ref. 58], p. 90, and Nature (Sept 1911), 319. See also Jensen, ref. 81, p. 522.