The subdivision of the Historical Sciences offers no methodological difficulty as soon as those epistemological arguments are acknowledged by which we sharply distinguish history from the Physical and Mental Sciences. If history is a system of will-relations which is in teleological connection with the will-demands that surround us, then political history loses its predominant rôle, and the history of law and of literature, of language and of economy, of art and religion, become coördinated with political development, while the mere anthropological aspect of man is relegated to the physical sciences. The more complete original scheme was here again finally condensed for practical reasons; for instance, the planned departments on the History of Education, on the History of Science, and on the History of Philosophy were sacrificed, and the department of Economic History was joined to that of Political History. In the same way we felt obliged to omit in the end many important sections in the departments; we had, for instance, in the History of Language at first a section on Slavic Languages; yet the number of scholars interested was too small to justify its existence beside a section on Slavic Literature. Also the History of Music was omitted from the History of Art; and the History of Law was planned at first with a fuller ramification. The division of Physical Sciences naturally suggested that kind of subdivision which the positivistic classification presents as a complete system of sciences. Considering physics and chemistry as the two fundamental sciences of general laws, we turn first to astronomy, then from the science of the whole universe to the one planet, to the sciences of the earth; thence to the living organisms on the earth; and from biology to the still narrower circle of anthropology. The special classification of physics offers a certain difficulty. To divide it in text-book fashion into sound, light, electricity, etc., seems hardly in harmony with the effort to seek logical principles in the other parts of the classification. The three groups which we finally formed, Physics of Matter, Physics of Ether, and Physics of Electron, may appear somewhat too much influenced by the latest theories of to-day, yet it seemed preferable to other principles. In the biological department, criticism seems justified in view of the fact that we constructed a special section, Human Anatomy. A strictly logical scheme might have acknowledged that human anatomy is to-day not a separate science, and that it has resolved itself into comparative anatomy. Sections of Invertebrate and Vertebrate Anatomy might have been more satisfactory. The final arrangement was a concession to the practical interests of the physicians, who have naturally to emphasize the anatomy of the human organism.