Solution of a Process of Random Genetic Drift with a Continuous Model.

30 See H. C. Urey, Geochim. et cosmochim. acta, 1, 209-277, 1951; see, particularly, pp. 233 ff. This paper was reproduced in The Planets, pp. 124 and 141, particularly. Later G. P. Kuiper published the same idea in Atmospheres of the Earth and Planets (Chicago: University of Chicago Press, 1952), pp. 330, 314 (ref. 18), and 421. 31 See H. Jeffreys, The Earth (4th ed.; Cambridge: At the University Press, 1952), chap iv, p. 159, and papers there cited; H. C. Urey, The Planets, pp. 20 ff. 32 See H. C. Urey, The Planets, p. 124, and Astrophys. J., Suppl., 1, 155, 1954. 33 H. C. Urey, The Planets, pp. 49 ff. 34 See B. Gutenberg, Internal Constitution of the Earth (New York: Dover Publications, Inc., 1951), pp. 150 ff. 36 H. C. Urey, Proc. Roy. Soc. London, A, 219, 281,1953. 36 H. C. Urey, The Planets, p. 176. 37 See H. C. Urey, Phys. Rev., 80, 295,1950; The Planets, pp. 64 ff.