homas into the Philistine, Bohemian, and Creative
types, while suggestive, is obviously too simple for an adequate
description of the rich and complex variety of personalities.

This survey indicates the present status of attempts to define and
measure differences in original and human nature. A knowledge of
individual differences is important in every field of social control. It
is significant that these tests have been devised to meet problems of
policies and of administration in medicine, in industry, in education,
and in penal and reformatory institutions. Job analysis, personnel
administration, ungraded rooms, classes for exceptional children,
vocational guidance, indicate fields made possible by the development of
tests for measuring individual differences.

SELECTED BIBLIOGRAPHY

I. ORIGINAL NATURE

A. _Racial Inheritance_

(1) Thomson, J. Arthur. _Heredity._ London and New York, 1908.

(2) Washburn, Margaret F. _The Animal Mind._ New York, 1908.

(3) Morgan, C. Lloyd. _Habit and Instinct._ London and New York, 1896.

(4) ----. _Instinct and Experience._ New York, 1912.

(5) Loeb, Jacques. _Comparative Physiology of the Brain and Comparative
Psychology._ New York, 1900.

(6) ----. _Forced Movements._ Philadelphia and London, 1918.

(7) Jennings, H. S. _Behavior of the Lower Organisms._ New York, 1906.

(8) Watson, John. _Behavior: an Introduction to Comparative Psychology._
New York, 1914.

(9) Thorndike, E. L. _The Original Nature of Man._ Vol. I of
"Educational Psychology." New York, 1913.

(10) Paton, Stewart. _Human Behavior._ In relation to the study of
educational, social, and ethical problems. New York, 1921.

(11) Faris, Ellsworth. "Are Instincts Data or Hypotheses?" _American
Journal of Sociology_, XXVII (Sept., 1921.)

B. _Heredity and Eugenics_

1. Systematic Treatises:

(1) Castle, W. E., Coulter, J. M., Davenport, C. B., East, E. M., and
Tower, W. L. _Heredity and Eugenics._ Chicago, 1912.

(2) Davenport, C. B. _Heredity in Relation to Eugenics._ New York, 1911.

(3) Goddard, Henry H. _Feeble-mindedness._ New York, 1914.

2. Inherited Inferiority of Families and Communities:

(1) Dugdale, Richard L. _The Jukes._ New York, 1877.

(2) M'Culloch, O. C. _The Tribe of Ishmael._ A study in social
degradation. National Conference of Charities and Correction, 1888,
154-59; 1889, 265; 1890, 435-37.

(3) Goddard, Henry H. _The Kallikak Family._ New York, 1912.

(4) Winship,