_2._ Give a brief account of four bibliographies of bibliography stating the method and arrangement of two of them. _3._ Give a suggestive list of twelve reference books valuable as aids to book selection. _4._ Name ten modern books containing valuable bibliographies. _5._ Name six special bibliographies giving their plan of arrangement. _Lesson 3._ PRINCIPLES OF SELECTION. Book knowledge of the ideal selector should be both professional and technical, connoting familiarity with bibliographical aids, ability to compile bibliographical lists, and a thorough understanding of good bookmaking. A knowledge of printing and an acquaintance with the book trade, and a sense of personal intimacy with the books themselves is also necessary. Book selection is the most important part of a librarian’s work. To be efficient the student must make a study of the many important aids to book selection and bibliographical guides. His general education should include a wide knowledge of literary and general history, with a smattering of the arts and sciences, followed by a close study of the textual characteristics of books in comparison with editions and reprints, in analysis of the many and various translations of standard books and classics. General principles and theory of selection. Remember that public libraries cater for all readers, those who seek instruction, and others seeking recreation. Attempt made to satisfy all classes of readers. Principles governed by the student’s estimation, of the field of choice; the kind of library to be catered for; size of the library; amount of money available for book purchase. Even large libraries can only make a selection; the smaller the library the smaller the selection within a selection. Selection for public libraries differs from that necessary for private libraries, the former selects, the latter collects. Geographical position of the library to other libraries. Social conditions of the population. Proportional representation. Methods of selection. Choice between editions. Withdrawals and replacements. Unfinished publications. Donations. Duplication. Classification as an aid to selection. Second-hand books. Reader’s suggestions. Revision of stock. READING LIST. Adams--The problem of the small public library. _L.J. Vol. 29, 1904, pp. 365-367._ Bacon--Principles of book selection. _N.Y. Libraries. Vol. I. 1907, pp. 3-6._ Baker--Book selection for public libraries. _In The Librarian’s Guide, 1923. pp. 13-17._ Baker--Book selection: fundamental principles and some application. _L.A.R. Vol. 13, 1911, pp. 17-29._ Baker--Wanted a guide to books. _L.A.R. Vol. 2, 1900, pp. 89-97._ Barrett--On the selection of books for branch libraries. _L.A.R. Vol. 6, 1904, pp. 179-191._ Bascom--Book selection. _(A.L.A. Manual of library economy. Chap. 16). Published separately, 1922._ Bostwick--The American public library. _3rd edition. Appleton: New York, 1923. Chaps. 10 and 11, pp. 132-161._