ft fuer Philosophie und philosophische Kritik_, CXLI (1911),
1-40.

(5) Newell, W. W. "Individual and Collective Characteristics in
Folk-Lore," _Journal of American Folk-Lore_, XIX (1906), 1-15.

(6) Campeano, M. _Essai de psychologie militaire individuelle et
collective._ Avec une preface de M. Th. Ribot. Paris, 1902.

(7) Hartenberg, P. "Les emotions de Bourse. (Notes de psychologie
collective)." _Revue philosophique_, LVIII (1904), 163-70.

(8) Scalinger, G. M. _La Psicologia a teatro._ Napoli, 1896.

(9) Burckhard, M. "Das Theater." Die Gesellschaft. _Sammlung
Sozial-Psychologische Monographien_, 18. Frankfurt-am-Main, 1907.

(10) Woolbert, C. H. "The Audience." "University of Illinois Studies."
_Psychological Monograph_, No. 92, XXI (1916), 36-54.

(11) Howard, G. E. "Social Psychology of the Spectator," _American
Journal of Sociology_, XVIII (1912), 33-50.

(12) Peterson, J. "The Functioning of Ideas in Social Groups,"
_Psychological Review_, XXV (1918), 214-26.

IV. MASS MOVEMENTS

(1) Bryce, James. "Migrations of the Races of Men Considered
Historically," _Contemporary Review_, LXII (1892), 128-49.

(2) Mason, Otis T. "Migration and the Food Quest: A Study in the
Peopling of America," _American Anthropologist_, VII (1894), 275-92.

(3) Pflugk-Harttung, Julius von. _The Great Migrations._ Translated from
the German by John Henry Wright. Philadelphia, 1905.

(4) Bradley, Henry. _The Story of the Goths._ From the earliest times to
the end of the Gothic dominion in Spain. New York, 1888.

(5) Jordanes. _The Origin and Deeds of the Goths._ English version by
Charles C. Mierow. Princeton, 1908.

(6) Archer, T. A., and Kingsford, C. L. _The Crusades._ New York, 1894.

(7) Ireland, W. W. "On the Psychology of the Crusades," _Journal of
Mental Science_, LII (1906), 745-55; LIII (1907), 322-41.

(8) Groves, E. R. "Psychic Causes of Rural Migration," _American Journal
of Sociology_, XXI (1916), 623-27.

(9) Woodson, Carter G. _A Century of Negro Migrations._ Washington,
1918. [Bibliography.]

(10) Fleming, Walter L. "'Pap' Singleton, the Moses of the Colored
Exodus," _American Journal of Sociology_, XV (1909-10), 61-82.

(11) Bancroft, H. H. _History of California._ Vol. VI, 1848-59. Chaps.
ii-ix, pp. 26-163. San Francisco, 1888. [The discovery of gold in
California.]

(12) Down, T. C. "The Rush to the Klondike," _Cornhill Magazine_, IV
(1898), 33-43.

(13) Ziegler, T. _Die geistigen und social