(22) Johnson, James W. _The Autobiography of an ex-Colored Man._ Published anonymously. Boston, 1912.

(23) Washington, Booker T. _Up from Slavery._ An autobiography. New York, 1901.

Introduction to the Science of Sociology — Part 150

(24) Du Bois, W. E. B. _The Souls of Black Folk._ Chicago, 1903.

Introduction to the Science of Sociology — Part 150

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Introduction to the Science of Sociology — Part 150

A. _The Nature of Individual Differences_

(1) Thorndike, E. L. _Individuality._ Boston, 1911.

(2) ----. "Individual Differences and Their Causes," _Educational Psychology_, III, 141-388. New York, 1913-14.

(3) Stern, W. _Ueber Psychologie der individuellen Differenzen._ Leipzig, 1900.

(4) Hollingworth, Leta S. _The Psychology of Subnormal Children._ Chap. i. "Individual Differences." New York, 1920.

(1) Goddard, H. H. _Feeble-mindedness._ Its causes and consequences. New York, 1914.

(2) Tredgold, A. F. _Mental Deficiency._ 2d ed. New York, 1916.

(3) Bronner, Augusta F. _The Psychology of Special Abilities and Disabilities._ Boston, 1917.

(4) Healy, William. _Case Studies of Mentally and Morally Abnormal Types._ Cambridge, Mass., 1912.

(1) Fouillée, A. _Tempérament et caractère selon les individus, les sexes et les races._ Paris, 1895.

(2) Hirt, Eduard. _Die Temperamente, ihr Wesen, ihre Bedeutung, für das seelische Erleben und ihre besonderen Gestaltungen._ "Grenzfragen des Nerven- und Seelenlebens," No. 40. Wiesbaden, 1905.

(3) Hoch, A., and Amsden, G. S. "A Guide to the Descriptive Study of Personality," _Review of Neurology and Psychiatry_, (1913), pp. 577-87.

(4) Kraepelin, E. _Psychiatrie._ Ein Lehrbuch für Studierende und Ärzte. Vol. IV, chap. xvi, pp. 1973-2116. 8th ed. 4 vols. Leipzig, 1909-15.

(5) Loewenfeld, L. _Ueber die geniale Geistesthätigkeit mit besonderer Berücksichtigung des Genie's für bildende Kunst._ "Grenzfragen des Nerven- und Seelenlebens," No. 21. Wiesbaden, 1903.

(1) Lombroso, C. _The Man of Genius._ Translated from the Italian. London and New York, 1891.

(2) ----. _L'uomo delinquente in rapporto all'antropologia, alla giurisprudenza ed alle discipline carcerarie._ 3 vols. 5th ed. Torino, 1896-97.

(3) Goring, Charles. _The English Convict._ A statistical study. London, 1913.

(4) Wilmanns, Karl. _Psychopathologie des Landstreichers._ Leipzig, 1906.