We have long been accustomed to speak of three great factors in modern civilization--the school, the church, and the home. Must we, in view of such a significant meeting as this, add a fourth factor--the library? The modern library has in some places become a true school; in other places it has radiated something of the refinement for which we once looked to the home, and something of the idealism which is a peculiar gift of the church. The library is vastly more than a collection of books: it is a social, civilizing, moralizing force. We expect to find the library building in every city and town as much as to find the spire of the church or the flag of the schoolhouse. The visitor to Boston to-day finds the public library as commanding a pile as Trinity Church, and far more imposing than any schoolhouse. The visitor to New York finds the new public library building climbing into a mass and dignity as great as that of any cathedral. No smallest village is now complete without its library, and when some future Goldsmith shall sing the praise of another "Deserted village," he will point out not only with the "noisy mansion" of the school-master, not only the church adorned with the meek and unaffected grace of the rural pastor, but the loaded shelves, the catalogs and reference lists, the chairs and tables, and the zeal unaffected, though not always meek, of the modern librarian. These libraries have sprung into being throughout the land without specific legislation and without deliberate propaganda. The church missionary societies of the country have adopted the avowed policy of planting a church in every community, and appointing superintendents of missions to see that this is done. Every state in the Union has its laws for the establishment and maintenance of schools. But these multiplying libraries have come into being without enactment of law or the preaching of the crusade. They have spread from sea to sea by a happy contagion, they have become a noble American epidemic. The great inarticulate thirst for knowledge has demanded satisfaction, and created its own supply. Our wisest directors of public sentiment and philanthropic endeavor have realized that through the library may come a charity that does not pauperize, a help that induces self-help, light to irradiate the dark places of civilization, inspiration for every calling, and access and power to every worthy institution and noble cause. What then is the specific function of this new and powerful institution in modern life? What is the contribution of the library to modern civilization? The library makes to the nation three gifts: the gift of knowledge, the gift of perspective, the gift of ideals. Putting the matter in another way, we may say it gives us facts, relations, values.