The instructor for all the subjects mentioned excepting the public library is logically the teacher, because the subjects must be introduced as occasion arises in class. For instance the time for teaching the physical care of a book is when a book is first put into the child's hands. For the talk on the public library, the library itself is obviously the place, and the children's librarian the instructor Some special methods which suggest themselves are as follows: for the physical care of a book, a class drill in opening, holding, shutting, laying down, etc., rewards for the cleanest books, etc.; for the card catalogue, sample sets of catalogue cards (author, title and subject). The latter method is successfully used by the Binghamton (N. Y.) public library. In high school, students vary in age from the grammar school boy on the one side, to the college freshman on the other, and the subjects and methods of instruction vary accordingly. In the matter of bibliographical instruction this greater range is reflected in a closer study of reference tools, including those parts of an ordinary book not taken up in the grades, (e.g., copyright date, preface, peculiar indexes, etc.), the unabridged dictionary, selected reference books, card catalog, magazine indexes, etc. The intelligent care of books can be re-emphasized by an explanation of book structure from dissected examples. The specific subjects to be taught will vary with the time available, the class of the student, the subjects taught in school and the method of teaching them, and the material on hand in the public or school library. As to general methods of instruction, these also must vary to suit the subject, the age of the student and the time available. Straight lecturing economizes time but makes the class restless and inattentive. An oral quiz drawing on the student's own experience is useful in getting the recitation started and revives interest when interspersed through a lecture. Each point should be illustrated by concrete examples from books themselves when possible, or from the blackboard. The lesson should be concluded by a written exercise, not too difficult, which should be marked. For example, the dictionary might be illustrated from the sample sheets issued by the publishers; and the class should then be given a list of questions to be answered from the dictionary. The questions can frequently be framed so as to be answered by a page number instead of a long answer, and each student should as far as practicable have a set of questions to answer different from every other student's. If the high school possesses a library, much of the instruction is most logically given there. This save the time of the class in travelling back and forth from the school to the public library, particularly if the course is an extended one. But why does the instruction of school children in the use of books and libraries concern the public library?