TABLES I. RELATIONSHIP OF BOOK READING TO THE USE OF OTHER TYPES OF COMMUNICATION 8 2. SOURCES OF BOOKS FOR ADULTS 12 3. SOURCES OF BOOKS FOR CHILDREN AND YOUNG PEOPLE 14 4. RELATIONSHIP BETWEEN PUBLIC LIBRARY USE AND THE USE OF OTHER COMMUNICA- TIONS 16 5. “JUVENILES” (UNDER FIFTEEN) IN THE POPULATION, IN REGISTRATION FOR PUBLIC LIBRARY SERVICE AND IN PUBLIC LIBRARY CIRCULATION, BY SIZE OF CITY 20 6. DIFFERENT AGE GROUPS (ADULTS) USING THE PUBLIC LIBRARY, ADAPTED FROM VAR- I0US STUDIES 23 7. PUBLIC LIBRARY USERS (ADULTS) IN DIF- FERENT AGE GROUPS, ADAPTED FROM VAR- IOUS STUDIES 25 8. DIFFERENT EDUCATIONAL GROUPS (ADULTS) USING THE PUBLIC LIBRARY, ADAPTED FROM VARIOUS STUDIES 26 9. PUBLIC LIBRARY USERS (ADULTS) IN DIF- FERENT EDUCATIONAL GROUPS, ADAPTED FROM VARIOUS STUDIES . RELATIONSHIP BETWEEN VARIOUS CHAR- ACTERISTICS OF ADULTS AND PUBLIC LI-