Note 4 — The Cause of the Ice Age.
Reading edition
Transactions of the Technical Society of the Pacific Coast, Sept., 1891, Vol. VIII. See also The Climate Controversy, S. V. Wood, Jr., Geol. Mag., 1876 and 1883. Climate and Time, Climate and Cosmology, Croll. Island Life, Alfred Russell Wallace, F. R. S., etc. Philosophical Magazine, May, 1864. British Association Reports, part 2, p. 11. Proceedings Royal Soc., vol. xxviii, p. 15. Quart. Jour. Geological Soc., Feb., 1878. Nature, July 4, 1878. Trans. Geological Soc., Glasgow, Feb. 22, 1877. The Ice Age in North America, Dr. Fred. G. Wright, Appendix by Warren Upham. The Cause of an Ice Age, Sir Robert Ball, F. R. S., etc. Révolutions de la Mer. Déluges Périodiques, Alphonse Joseph Adhémar.