(17) ----. _Tramping with Tramps._ New York, 1899.

(18) c.u.mmings, B. F. _The Journal of a Disappointed Man_, by Barbellion, W. N. P. [_pseud._] Introduction by H. G. Wells. New York, 1919.

(19) Audoux, Marguerite. _Marie Claire._ Introduction by Octave Mirabeau. Translated from the French by J. N. Raphael. London and New York, 1911.

(20) Clemens, Samuel L. _The Adventures of Tom Sawyer_, by Mark Twain [_pseud._]. New York, 1903.

(21) Hapgood, Hutchins. _The Autobiography of a Thief._ New York, 1903.

(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.

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

(25) Beers, C. W. _A Mind That Found Itself._ An autobiography. 4th rev.

ed. New York, 1917.

IV. INDIVIDUAL DIFFERENCES

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.

B. _Mental Differences_

(1) G.o.ddard, 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, Ma.s.s., 1912.

C. _Temperamental Differences_

1. Systematic Treatises:

(1) Fouillee, A. _Temperament et caractere selon les individus, les s.e.xes et les races._ Paris, 1895.

(2) Hirt, Eduard. _Die Temperamente, ihr Wesen, ihre Bedeutung, fur 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 fur Studierende und arzte.

Vol. IV, chap. xvi, pp. 1973-2116. 8th ed. 4 vols. Leipzig, 1909-15.

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

2. Temperamental Types:

(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.

(5) Downey, June E. "The Will Profile." A tentative scale for measurement of the volitional pattern. _University of Wyoming Bulletin_, Laramie, 1919.

(6) Pagnier, A. _Le vagabond._ Paris, 1910.

(7) Kowalewski, A. _Studien zur Psychologie der Pessimismus._ "Grenzfragen des Nerven- und Seelenlebens," No. 24. Wiesbaden, 1904.

D. _s.e.x Differences_

(1) Ellis, H. H. _Man and Woman._ A study of human secondary s.e.xual characters. 5th rev. ed. London and New York, 1914.

(2) Geddes, P., and Thomson, J. A. _The Evolution of s.e.x._ London, 1889.

(3) Thompson, Helen B. _The Mental Traits of s.e.x._ An experimental investigation of the normal mind in men and women. Chicago, 1903.

(4) Montague, Helen, and Hollingworth, Leta S. "The Comparative Variability of the s.e.xes at Birth," _American Journal of Sociology_, XX (1914-15), 335-70.

(5) Thomas, W. I. _s.e.x and Society._ Chicago, 1907.

(6) Weidensall, C. J. _The Mentality of the Criminal Woman._ A comparative study of the criminal woman, the working girl, and the efficient working woman, in a series of mental and physical tests.

Baltimore, 1916.

(7) Hollingworth, Leta S. "Variability as Related to s.e.x Differences in Achievement," _American Journal of Sociology_, XIX (1913-14), 510-30.

[Bibliography.]

E. _Racial Differences_