To do so involves consequences which may be inconvenient. For a possible service means a correlative duty. And as I myself to a degree represent here the central authority in question, whatever I state as a service appropriate for that authority, I shall have to admit as a duty in which I must share. I shall try to be candid. But under the circumstances I cannot be expected to be more than candid. In some respects the Federal Government of the United States has already influenced the constitution, resources and service of our public libraries. It has enacted laws which, having for their primary purpose the protection of authors and publishers, benefit libraries by encouraging the manufacture of books soundly, substantially and honestly made. It has favored public libraries by exempting from tariff duty books imported for their use. It has encouraged the study of the classics by laying a penalty upon the general importation of books less than twenty years old. In its executive capacity it is itself investigator, author, publisher, manufacturer, distributor, statistician, bibliographer, and librarian. It maintains at Washington, with a generosity not paralleled by any other government, bureaus for scientific research; it compiles, publishes, and freely distributes the results of this research. It is the greatest publisher in the world, and the largest manufacturer of books. In a single publication, repeated each year, it consumes over a million pounds of paper stock; and it maintains a bureau whose purpose is to replenish the forests which as publisher it thus depletes. It distributes gratuitously to the libraries of the United States each year over 300,000 volumes, embodying the results of its research, its legislative proceedings, and an account of its administrative activities. It maintains a bureau for the investigation of problems in education, for the accumulation and dissemination of information concerning the work of educational institutions; and it has included the public libraries of this country among such educational institutions. This bureau has issued three reports tabulating statistics concerning them, one also (in 1876) summarizing their history and two (in 1876 and in 1893) containing essays which embody the best contemporary opinion as to library equipment and methods. It has published as a document the A. L. A. list of best books to form the basis of a public library. Through its bureau of documents it is seeking to index and adequately to exhibit its own publications, to facilitate their distribution to libraries and to afford to libraries as to federal documents a clearing house for duplicates. All such services are obviously appropriate for the national authority and may doubtless be continued and extended. If the interchange of books among libraries is to be facilitated by special postal regulations this can be accomplished by the national authority alone.