of, 742-45;
investigations and problems, 769-75;
as like-mindedness, 735, 741;
and mediation of individual differences, 766-69;
natural history of, 774;
in personal development, 511;
popular conceptions of, 724-35;
a problem of secondary groups, 761;
a process of prolonged contact, 741;
of races, 756-62;
and racial differences, 769-70;
sociology of, 735-37.
_See_ Amalgamation, Americanization, Cultures, conflict and fusion of,
Denationalization.

ATTENTION, in relation to imitation, 344, 391-94.

ATTITUDES:
_bibliography_, 501;
as behavior patterns, 439-42;
complexes of, 57;
polar conception of, 441-42;
as the social element, 438-39;
as social forces, 467-78;
in subordination and superordination, 692-95;
and wishes, 442-43;
wishes as components of, 439.

BALKED DISPOSITION, a result of secondary contacts, 287.

BEHAVIOR:
defined, 185-86;
expressive and positive, 787-88.

BEHAVIOR, COLLECTIVE. _See_ Collective behavior.

BEHAVIOR PATTERNS, and culture, 72.

BLUSHING, communication by, 365-70.

BOLSHEVISM, 909-15.

BUREAU OF MUNICIPAL RESEARCH, of New York City, 46, 315.

CARNEGIE REPORT UPON MEDICAL EDUCATION, 315.

CASTE:
_bibliography_, 728;
as an accommodation of conflict, 584;
defined, 203-4;
a form of accommodation group, 50;
interpreted by superordination and subordination, 684-88;
its origin in India, 681-84;
and the limitation of free competition, 620-22;
study of, 722-23.

CATEGORIC CONTACTS. _See_ Sympathetic contacts.

CEREMONY:
_bibliography_, 855-56;
as expressive behavior, 787-88;
fundamental form of social control, 787.

CHARACTER:
defined, 81;
inherited or acquired, 127-28;
and instinct, 190-93;
as the organization of the wishes of the person, 490;
related to custom, 192-93.

CIRCLE, VICIOUS. _See_ Vicious circle.

CIRCULAR REACTION. _See_ Reaction, circular.

CITY:
an area of secondary contacts, 285-87;
aversion, a protection of the person in the, 584-85;
and the evolution of individual types, 712-14;
growth of, 534-35;
physical human type of, 535-38;
planning, studies of, 328-29;
studies of, 331.

CIVILIZATION:
and historical continuity, 298-301;
life of, 956-57;
and mobility, 303-5;
a part of nature, 3;
an organization to realize wishes, 958;
and permanent settlement, 529-30.

CLASS CONSCIOUSNESS, 40.

CLASSES, SOCIAL:
_bibliography_,