al research, and an experimental social science.

REPRESENTATIVE WORKS IN SYSTEMATIC SOCIOLOGY AND METHODS OF SOCIOLOGICAL
RESEARCH

I. THE SCIENCE OF PROGRESS

(1) Comte, Auguste. _Cours de philosophie positive_, 5th ed. 6 vols.
Paris, 1892.

(2) ----. _Positive Philosophy._ Translated by Harriet Martineau, 3d ed.
London, 1893.

(3) Spencer, Herbert. _Principles of Sociology._ 3d ed. 3 vols. New
York, 1906.

(4) Schaeffle, Albert. _Bau und Leben des socialen Koerpers._ 2d ed., 2
vols. Tuebingen, 1896.

(5) Lilienfeld, Paul von. _Gedanken ueber die Socialwissenschaft der
Zukunft._ 5 vols. Mitau, 1873-81.

(6) Ward, Lester F. _Dynamic Sociology._ 2 vols. New York, 1883.

(7) De Greef, Guillaume. _Introduction a la sociologie._ 3 vols. Paris,
1886.

(8) Worms, Rene. _Organisme et societe._ Paris, 1896.

II. THE SCHOOLS

A. _Realists_

(1) Ratzenhofer, Gustav. _Die sociologische Erkenntnis._ Leipzig, 1898.

(2) Small, Albion W. _General Sociology._ Chicago, 1905.

(3) Durkheim, Emile. _De la Division du travail social._ Paris, 1893.

(4) Simmel, Georg. _Soziologie._ Untersuchungen ueber die Formen der
Vergesellschaftung. Leipzig, 1908.

(5) Cooley, Charles Horton. _Social Organization._ A study of the larger
mind. New York, 1909.

(6) Ellwood, Charles A. _Sociology and Its Psychological Aspects._ New
York and London, 1912.

B. _Nominalists_

(1) Tarde, Gabriel. _Les Lois de l'imitation._ Paris, 1895.

(2) Giddings, Franklin H. _The Principles of Sociology._ New York, 1896.

(3) Ross, Edward Alsworth. _The Principles of Sociology._ New York,
1920.

C. _Collective Behavior_

(1) Le Bon, Gustave. _The Crowd._ A study of the popular mind. New York,
1903.

(2) Sighele, Scipio. _Psychologie des sectes._ Paris, 1898.

(3) Tarde, Gabriel. _L'Opinion et la foule._ Paris, 1901.

(4) McDougall, William. _The Group Mind._ Cambridge, 1920.

(5) Vincent, George E. _The Social Mind and Education._ New York, 1897.

III. METHODS OF SOCIOLOGICAL INVESTIGATION

A. _Critical Observation on Methods of Research_

(1) Small, Albion W. _The Meaning of Social Science._ Chicago, 1910.

(2) Durkheim, Emile. _Les Regles de la methode sociologique._ Paris,
1904.

(3) Thomas, W. I., and Znaniecki, F. _The Polish Peasant in Europe and
America._ "Methodological Note," I, 1-86. 5 vols. Boston, 1918-20.

B. _Studies of Communities_

(1) Booth, Charles. _Labour and Life of the People: London._ 2