Mr. HODGES described briefly the classification of the scientific books at Harvard. First, the serial publications of the broad learned societies, the societies taking cognizance of all branches of learning, are brought together arranged alphabetically by country and city. Secondly, the general scientific serials and the special scientific serials, however published, are arranged in a group; the general coming first, the others following according to subject, astronomy, mathematics, physics, chemistry, natural history, zoology, botany, etc. When suggesting the separation of the serials in pure science from the handbooks at the very outset of his work at Harvard, Mr. Hodges urged that the serials constitute a record literature to which the investigator must refer when carrying on original work, while the handbooks are used by the pedagog when preparing for his classwork. The general designation for the learned society group is L. Soc.; for the scientific serials, Sci. The handbooks on physics are in a group designated Phys.; the general treatises by Phys. 357-360. A treatise published in 1892 is marked Phys. 358-92; another of the same year, by Phys. 358.92.3. Mr. ROOT said: It may possibly have interest in this connection to note that the catalog of the University of Göttingen, which was established about 1750, has the feature which has been mentioned here as characteristic of the Harvard system. The books are grouped in large classes with an abbreviated heading, with minute sub-classification. Just when this system was introduced I do not know, but I suppose it to have been in use a hundred years or so, which I judge to be a longer life than Mr. Fletcher is willing to allow to the D. C. Interesting remarks were made by several others, notably Mr. Andrews, Dr. Steiner and Dr. Canfield. It is to be regretted that the revision of their remarks has not been received in time for publication. OLIVE JONES, _Secretary_. CATALOG SECTION. The Catalog Section of the American Library Association held two meetings in connection with the Waukesha conference. _FIRST SESSION._ The first session was held in one of the parlors of the Fountain Spring House, on the afternoon of Tuesday, July 9. The chairman, ANDERSON H. HOPKINS, called the meeting to order. It was _Voted_, That the section waive the formality of registration of members preliminary to voting. It was _Voted_, That the chairman appoint a nominating committee of three, to report at the close of the session. This committee was appointed as follows: Miss Sula Wagner, Mr. Jones, Mr. Roden.