(7) ——. "The Value of the Study of Colonies for Sociology," American Journal of Sociology, XII (1906), 417-20.

(8) Roscher, W., and Jannasch, R. Kolonien, Kolonialpolitik und Auswanderung. 3d ed. Leipzig, 1885.

(9) Leroy-Beaulieu, P. De la colonisation chez les peuples modernes. 5th ed., 2 vols. Paris, 1902.

(10) Huntington, Ellsworth. Civilization and Climate. Chap. iii, "The White Man in the Tropics," pp. 35-48. New Haven, 1915.

(11) Ward, Robert De C. Climate. Considered especially in relation to man. Chap. viii, "The Life of Man in the Tropics," pp. 220-71. New York, 1908.

(12) Bryce, James. "British Experience in the Government of Colonies," Century, LVII (1898-99), 718-29.

C. Superordination and Subordination

(1) Simmel, Georg. "Superiority and Subordination as Subject Matter of Sociology," translated from the German by Albion W. Small, American Journal of Sociology, II (1896-97), 167-89, 392-415.

(2) Thorndike, E. L. The Original Nature of Man. "Mastering and Submissive Behavior," pp. 92-97. New York, 1913.

(3) McDougall, William. An Introduction to Social Psychology. "The Instincts of Self-Abasement (or Subjection) and of Self-Assertion (or Self-Display) and the Emotions of Subjection and Elation," pp. 62-66. 12th ed. Boston, 1917.