In the arrangement of the papers the order of the official programme is followed exactly, with the exception that, under Historical Science, Departments 3, 4, and 8, covering History of Politics, Law, and Religion, are combined in one volume; and Departments 5, 6, and 7, covering History of Language, Literature, and Art, are combined in the succeeding volume. In volume one, the first chapter is devoted to the history of the Congress, written by the editor, in which is set forth the plain narrative of the growth and development of the Congress, as much for the benefit of similar undertakings in the future as for the interest of those participating in this Congress. The second chapter contains the scientific introduction, written by Prof. Hugo Münsterberg of Harvard University, First Vice-President of the Congress and Member of the Organizing Committee. This is written for the purpose of giving in detail the principles upon which the classification was based, and the relations which the different sections and departments held to each other. Each paper is prefaced by a very short biographical note in categorical form, for the purpose of insuring the identity of the speaker as long in the future as the volumes may exist. Appended to the addresses of each department is a short bibliography, which is essential for a general study of the subject in question. These are in no wise exhaustive or complete, but are rather designed to be a small, valuable, working reference library for students. The bibliographies have been prepared by eminent experts in the departments of the Congress, but are necessarily somewhat uneven, as some of the writers have gone into the subject more thoroughly than others. The general arrangement of the bibliographies is: 1. Historical books and standard works dealing with the subject. 2. General books for the whole department. 3. Books for sections of departments. Appended also to the addresses of each department and sections are résumés of the ten-minute addresses delivered by invitation at the meeting of the department or section. Many of these papers are of high value; but inasmuch as very few of them were written in accord with the plan of the Congress, and with the main thought to be developed by the Congress, but deal rather with some interesting and detached phase of the subject, it has been deemed best not to print them in full, but to indicate in brief the subject and the treatment given it by the writer. Those which do accord with the plan of the Congress are given more extensive treatment. CONCLUSION What the results of the Congress will be; what influence it may have; was it worth the work and cost, are questions often fairly asked.