In many departments of investigation, Washington takes the lead with the large collection of the various scientific, economic, and technical bureaus of the government. The best known of these is the unique medical library of the War Department. Then there is the Library of Congress, with many more than a million volumes, which today has an official right to one copy of every book published in the United States, and so may claim to be a national library. It is still not comparable to the many-sided and complete collection of the British Museum; the national library is one-sided, or at least shows striking gaps. Having started as the Library of Congress, it has, aside from its one copy of every American book and the books on natural science belonging to the Smithsonian Institution, few books except those on politics, history, political economy, and law. The lack of space for books, which existed until a few years ago, made it seem inexpedient to spend money for purposes other than the convenience of congressmen. But the American people, in its love for books, has now erected such a building as the world had never before seen devoted to the storing of books. The new Congressional Library was opened in 1897, and since the stacks have still room for several million volumes, the library will soon grow to an all-round completeness like that at London. This Library has a specially valuable collection of manuscripts and correspondences. All the collections of books which we have so far mentioned are virtually like those of Germany. But since they mostly date from the nineteenth century, the American libraries are more modern, and contain less dead weight in the way of unused folios. Much more important is their greatly superior accessibility. Their reading-rooms are more comfortable and better lighted, their catalogs more convenient, library hours longer, and, above all, books are more easily and quickly delivered. Brooks Adams said recently, about the library at Washington as a place for work, that this building is well-nigh perfect; it is large, light, convenient, and well provided with attendants. In Paris and London, one works in dusty, forbidding, and overcrowded rooms, while here the reading-rooms are numerous, attractive, and comfortable. In the National Library at Paris, one has to wait an hour for a book; in the British Museum, half an hour, and in Washington, five minutes. This rapid service, which makes such a great difference to the student, is found everywhere in America; and everywhere the books are housed in buildings which are palatial, although perhaps not so beautiful as the Washington Library.