While the Association is engaged in considering the proposals of the Statistical Committee, it may be helpful to note what has been written about insanity from the point of view of a librarian. The following extended classification has been found adequate for the arrangement of some 1,500 books and pamphlets relating to this subject. An authors catalogue is easily prepared upon the usual dictionary plan, but it assumes a wide knowledge of literature, not only as a matter of history, but also as an incessant and overmastering growth. A subjects catalogue, on the other hand, is the method of importance to workers who, with the least possible delay, want to ascertain what has been written on all or any of the various aspects of the main subject engaging attention.