"While in the beginning the attempt was made to adhere fairly closely to the proportion of titles to each subject given in the 1904 Catalog, it was found impossible to do so without impairing the usefulness of the list. The output of books in the subjects grouped under Sociology has been so great, and the demand for them so heavy, that it seemed better to include a larger number than was originally planned rather than risk weakening the usefulness of the section. The greatest increase has been in Useful Arts, and this was intentional, since there is no division where the average librarian is more in need of help, nor where it is more difficult to find the "best book" on short notice. "Two special lists are incorporated in the Catalog, both in answer to definite requests. One is a selection of about 50 titles of religious books specially chosen for Catholic readers. Two preliminary selections were made, one by an assistant in the St. Louis public library at the request of the librarian, Dr. A. E. Bostwick, and a second by the Rev. W. J. McMullen of Pittsburgh, at the request of the librarian of the Carnegie library of Pittsburgh, Mr. H. W. Craver. Both lists were then incorporated into a much more extensive one, covering all subjects, compiled by Mr. William Stetson Merrill, of the Newberry library. The final selection, limited to religious books, was submitted to Archbishop Ireland, and at his request was examined by the Rev. J. A. Ryan, of the St. Paul Seminary, St. Paul, Minn." The second list consists of 50 titles of modern drama and books about it. It was impossible to get any unanimity of opinion on such a brief selection and the editor is aware that it will satisfy a very small proportion of libraries. It is allowed to stand, however, for the suggestion it may give to the perplexed librarian of the smaller library.