One of the functions of the modern library is that of a huge
cyclopedia, kept continually up to date by the acquisition
of new material--books, periodicals, prints, pamphlets,
clippings, publicity matter and manuscripts. It is the
cyclopedia on cards long advocated by Dr. Dewey, except that
the cards are in its catalogue and do not contain the
information directly but serve only as keys to it. In this
kind of service the library is for the moment getting away
from books and nearer to the worker, whether at home, in
school or laboratory, or in commerce and industry.