It is well to remember that, as far as its place in the school is concerned, the library must always be an auxiliary, not an independent affair--an auxiliary of the greatest importance which aids all courses but interferes with none. This is what it is in the increasing number of schools in which the use of the library is being successfully taught and whenever teachers are shown that librarians are urging something that is a time-saver, not a time-consumer, and that the course they suggest is not an independent affair but something which, even in its own lessons and problems can be made to bear directly on the daily work of the school, there will not be much trouble in getting periods in which to teach the use of the library. As we too often present the matter, in the form of courses planned with little reference to actual conditions in the school and with problems compiled from our library-school note-books, or our training-class notes and not from material selected for its direct relation to the subject matter of any course in the school, we are seemingly asking the teacher to become interested in _our_ work, not in a subject that is of importance to teacher as well as to librarian. No general can plan a successful campaign of invasion without a knowledge of the topography and people of the country to be invaded and no course of study can be successful unless based on sound pedagogy and visibly related to the cultural or vocational need of the persons for whom it is intended. It is also well to remember that in strategy an officer counts for more than a private and that if official recognition is to be secured for any subject, the interest of principals and superintendents, who plan the curricula, is absolutely necessary. Work with subordinate teachers alone will make slow progress. Another point which we are just beginning to emphasize is the necessity of getting articles in which we desire teachers to be interested, into periodicals intended for teachers instead of confining them to the columns of library periodicals. The advertiser who wants to reach engineers will not send his advertisements exclusively to the "American journal of theology."