Because if children learn to use ordinary books intelligently it means a saving of the librarian's time by her not having to find the precise page of every reference for a child. It means a diminished amount of handling of books. It means less disturbance from children who do not know how to find what they want. Other results will doubtless suggest themselves. It is not proposed to train the student to be a perfectly independent investigator. That would be impracticable and undesirable. It is simply proposed to give him such bibliographical knowledge as will be distinctly useful to him as a student now, and later as a citizen and patron of the library. But what part may the public library play in this instruction? It obviously may play a very large part in high schools, the librarian of which it supplies, as in the city of Cleveland. In high schools when the librarian is appointed by the school authorities, it can cooperate with the school librarian by lending speakers to describe the public library, by furnishing sets of specimen catalogue cards for comparison--for public library cataloging may differ from high school cataloging--by lending old numbers of the Readers' Guide for practice in bibliography making, etc., etc. Where there is no high school library and instruction must be given by the teacher or the public librarian, again the opportunities of the public library are clear. First there are teachers to be interested. English and history teachers most obviously, and department heads of these subjects are strategic points for attack. The subject of course should never be forced and a beginning should be made only with those teachers who seem likely to take interest. In the Binghamton public library before referred to, the librarian contrived to get the teachers together socially at the library, and the plan was then discussed before being put into operation. In laying the foundation for such a campaign, the librarian should have a simple, but definite plan in mind, based on her experience with school children so that when asked for suggestion, she can advance a practicable proposition. Finally, under any circumstances, the public library can always be open for visits from classes, and ready to give class instruction in either library or school room as necessity or opportunity suggests. These methods are of course well known. Much informal instruction can also be given to students on using the index of an ordinary book, or the encyclopedia as occasion arises. Summing up the chief points of this superficial review, we have seen (1) that the change in teaching methods has made the subject of library instruction important. (2) That the subjects of such instruction should be simple, and that both subjects and methods must be adapted to the occasion, (3) and finally that the public library is interested in the subject from a practical point of view and is able to take an influential part in shaping and administering courses.