^{page 747 note *} Jahrb. Geol. Reichanst., Wien, xxxiv, 1884, p. 707Google Scholar.

^{page 747 note †} “Chemical Analyses of Igneous Rocks, 1883–1913,” Prof. Paper, U.S. Geol. Surv., No. 99, 1917. pp. 1082–3.

^{page 747 note ‡} Holmes, A., “The Basalts of the Arctic Region,” Min. Mag., xviii, 1918, pp. 180–223;Google ScholarJan Mayen, pp. 202–5.

^{page 747 note §} “Jan Mayen Island,” Geog. Journ., lix, 1922, pp. 180–94Google Scholar.

^{page 748 note *} For locality references see paper and map by Wordie, J. M., these Transactions, liv, pt. iii., p. 743Google Scholar.

^{page 749 note *} Minéralogie de Madagascar, t. iii, 1923, p. 24Google Scholar.

^{page 749 note †} W.T., p. 278 (W.T. = Washington's Tables. For full reference see p. 747.)

^{page 749 note ‡} Igneous Rocks and Their Origin, 1914, p. 22.

^{page 749 note §} W.T., p. 276.

^{page 751 note *} Osann-Rosenbusch, Elem. d. Gesteinslehre, 4th ed., 1923, pp. 415–8.

^{page 751 note †} Min. de Madagascar, t. iii, 1923, pp. 328–9Google Scholar.

^{page 751 note ‡} Min. Mag., xix, 1921, p. 144Google Scholar.

^{page 752 note *} Igneous Rocks and Their Origin, 1914, p. 30.

^{page 752 note †} Ibid., p. 27.

^{page 753 note *} The Jan Mayen analyses are numbered consecutively throughout the tables.

^{page 753 note †} Less O for S, 100·41.

^{page 754 note *} Min. de Madagascar, t. iii, 1923, p. 53Google Scholar.

^{page 755 note *} Igneous Rocks and Their Origin, 1914, p. 31.

^{page 755 note †} Comptes Rendus, Paris, t. clxiii, 1916, p. 182Google Scholar.

^{page 756 note *} Min. de Madagascar, t. iii, 1923. p. 49Google Scholar.

^{page 756 note †} Ibid.

^{page 757 note *} Less O for S, 100·67.

^{page 757 note ‡} Min. de Madagascar, t. iii, 1923, pp. 49–50Google Scholar.

^{page 757 note §} N. J. f. Min., 1923, Bd. 8, Heft 2, pp. 226–31Google Scholar.

^{page 757 note ∥} Peacock, M. A., “A Contribution to the Petrography of Iceland,” Trans. Geol. Soc. Glasg., xvii, part 2, 1924–1925, pp. 288–90Google Scholar.

^{page 757 note †} Amer. Journ. Sci., v, 1923, p. 501;Google Scholar vi, 1923, pp. 344–7.

^{page 758 note *} Washington, H. S., “Deccan Traps and Other Plateau Basalts,” Bull. Geol. Soc. Amer., xxxiii, 1922, pp. 765–803CrossRefGoogle Scholar.

^{page 759 note *} “Microscopical Characters of Volcanic Tuffs,” Amer. Journ. Sci., xl, 1915, pp. 191–211Google Scholar.

^{page 759 note †} Scheumann, “Zur Genese alkalisch-lamprophyrisch Ganggesteine,” Centr. f. Min., 1922, pp. 495–520, 521–45.

^{page 759 note ‡} J. H. L. Vogt, “Die Physikalisch-Chemischen Gesetze der Magmatischen Differentiation,” Videnskaps-skr., I, Math. Nat. Kl. Kristiania, 1923, No. 17, p. 5.

^{page 760 note *} Less O for S, 100·41.

^{page 760 note †} Min. Mag., xviii, 1918, pp. 215–8Google Scholar.

^{page 762 note *} Grout, F. F., “Graphic Study of Igneous Rock Series,” Bull. Geol. Soc. Amer., xxxiii, 1922, p. 620Google Scholar.

^{page 762 note †} A. Holmes, Petrographic Methods and Calculations, 1921, pp. 447–51.

^{page 762 note ‡} This “Bowen-Anderson effect” has now been widely noted in basic lavas. See Washington, H. S., “Petrology of Hawaiian Islands. I. Kohala and Mauna Kea,” Amer. Journ. Sci., v, 1923, pp. 469–70;Google Scholar and Lacroix, A., “La notion de type doliomorphe en lithologie,” Comptes Rendus, Paris, t. 177, 1923, pp. 661–5Google Scholar.

^{page 763 note *} Trans. Geol. Soc. Glasg., xvii, pt. 2, 1924–1925, pGoogle Scholar.

^{page 764 note *} “Basaltic Rocks of the Arctic Regions,” Min. Mag., xviii, 1918, p. 220Google Scholar.

^{page 764 note †} “Later Stages of Evolution of Igneous Rocks,” Journ. Geol., xxiii, 1915, Suppl., pp. 77–8Google Scholar.

^{page 765 note *} M. A. Peacock, op. cit., pp. 281 et seq.