they contain. And whenever a question of fact comes up in general talk,
make a mental note of it, or better, one in writing, and the next time
you go to the library hunt it up in one of these reference books. You
will be surprised to see, when once you have made the habit, how short a
time it takes to settle disputes about most facts; and at the same time
you will be extending your general knowledge.

In learning the use of these and other books, do not forget the most
important source of all, the librarian. The one guiding principle of
modern librarianship is to make the books useful; and it gives every
proper librarian active pleasure to show you how to use the books in his
charge.

In using books and magazines scrutinize the character of the source. Is
it impartial or partisan? Is its treatment of the subject exhaustive and
definite, or cursory and superficial? Does the author know the subject
at first hand, or does he rely on other men? On such points the second
book or article will be easier to estimate than the first, and the third
than the second; for with each new source you have the earlier ones as a
basis for comparison. In any case do not trust to a single authority: no
matter how authoritative it is, sooner or later the narrow basis of your
views will betray itself, for an argument which is merely a revamping of
some one else's views is not likely to have much spontaneity.

In many subjects, and especially those of new or local interest, you
will not find the facts gathered and assimilated for you; you must go
out and gather your own straw for the making of your bricks. Such are
most questions of reform or change in school or college systems, in
athletics, in municipal affairs, in short, most of the questions on
which the average man after he leaves college is likely to be making