;
and appropriation of knowledge, 403-4;
and art, 401-8;
circular reaction, 390-91;
communication by, 72;
defined, 344, 390-91, 391-94;
in emotional communication, 404-7;
and fashion, 390;
and the imitative process, 292-93;
internal, 404-5;
and like-mindedness, 33;
as a process of learning, 344, 393-94;
and rapport, 344;
in relation to attention and interest, 344, 391-94;
in relation to trial and error, 344-45;
and the social inheritance, 390-91;
as the social process, 21;
study of, 423-24;
and suggestion, differentiated, 346;
and suggestion, inner relation between, 688-889;
and the transmission of tradition, 391-92.

IMMIGRATION:
_bibliography_, 780-81;
and Americanization, 772-75;
involves accommodation, 719.
_See_ Migration.

IMMIGRATION COMMISSION, REPORT OF, 772-73.

INBORN CAPACITIES, defined, 73-74.

INDIVIDUAL:
_bibliography_, 149-50, 152-53;
an abstraction, 24;
isolated, 55;
and person 55;
subordination to, 698-99.

INDIVIDUAL DIFFERENCES:
_bibliography_, 152-54, 276;
assimilation and the mediation of, 766-69;
cause of isolation, 228-29;
described, 92-94;
developed by city life, 313-15;
measurement of, 145-46;
in primitive and civilized man, 90;
and sex differences, 87.

INDIVIDUAL REPRESENTATION, 37, 193.

INDIVIDUALISM, and the division of labor, 718.

INDUSTRIAL ORGANIZATION:
_bibliography_, 564-65;
impersonality of, 287.

INHERITANCE, BIOLOGICAL:
_bibliography_, 147.

INHERITANCE, SOCIAL:
through imitation, 390-91.
_See_ Heritages, social.

"INNER ENEMIES." _See_ Defectives, dependents, and delinquents.

INSPIRATION, and public sentiment, 34, 35.

INSTINCTS:
_bibliography_, 147-48, 152-54;
and character, 190-93;
in conflict, 576-77; 579-82;
defined, 73-74;
gregarious, 742-45;
in the human baby, 82-84;
instinctive movements as race movements, 82;
physiological bases of assimilation, 742-45.
_See_ Human nature, Original nature.

INSTITUTIONS: defined, 796-97, 841;
investigations of, 51;
and law, 797-99;
and mass movements, 915-24;
and mores, 841-43;
natural history of, 16;
and sects, 872-74;
and social control, 796-99, 841-48, 851-53.

INTERACTION, SOCIAL:
_chap. vi_, 339-434;
_bibliography_, 425-31;
in communication, 341-43, 344-46, 356-89, 408-42;
concept of, 339-41;
in conflict, 582-86;
defines the group in time and space, 3