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pamphlet will be found useful, as a competent résumé of the subject, by the general student of philosophy as well as by the student of modern logic.

Dr. Urban says: "The following essay may be looked upon as an attempt to show, by means of a historical study of the development of the principle of Sufficient Reason, the standpoint occupied by the modern German logicians, as contrasted with the epistemologists of the metaphysical schools … The connexio rerum is the great problem of metaphysics, the connexio idearum the last question of logic in its broadest sense, and in no way have the mutual relations of the two been so subtly elucidated as in the critical study of this basal principle of Sufficient Reason." The Pre-Leibnizians are treated briefly; and Leibniz himself, of course, in considerable detail. The ambiguity of Leibniz's formulation of the principle is pointed out, an ambiguity which lends countenance, on the one hand, to a logical, and, on the other, to a metaphysical interpretation. The following historical treatment shows "that the succeeding movement at first manifests a decided trend toward the metaphysical side, to be replaced in more modern thought by the reformation of the logical point of view, broadened and changed.".

E. A.

The following books have also been received:

The Theatætus of Plato. By S. W. Dyde. A Translation with Introduction. Glasgow, James Maclehose & Sons, 1899.—pp. viii, 173.

The Philosophy of Greece. By A. W. Benn. London, Grant Richards, 1898.—pp. x, 308.

History of Ancient Philosophy. By W. Winderband. Translated by H. E. Cushman. New York, Charles Scribner's Sons, 1899.—pp. xv, 393.

The Moral Order of the World. By A. B. Bruce. New York, Charles Scribner's Sons, 1899.—pp. x, 431.

Syllabus of Psychology. By James H. Hyslop. New York, The Macmillan Company; Berlin, Mayer & Müller, 1899.—pp. viii, 116.

Syllabus of an Introduction to Philosophy. By W. T. Marvin. New York, The Macmillan Company; Mayer & Müller, 1899.—pp. x, 279.

Dionysos and Immortality. By B. I. Wheeler. Boston and New

York, Houghton, Mifflin & Company; Cambridge, The Riverside Press,

1899.—pp. x, 67.

Philosophy of History. By A. H. Lloyd. Ann Arbor, George Wahr, 1899.—pp. xix, 257.

Spinozistic Immortality. By G. S. Fullerton. University of Pennsylvania

Publications No. 3. Philadelphia, 1899. Ginn &Co., Selling Agents,

Tremont Place, Boston.—pp. x, 154.

Social Laws. By G. Tarde. Translated by H. C. Warren, with Preface

by J. M. Baldwin. New York, The Macmillan Company; London,

Macmillan & Co., Ltd., 1899.—pp. xi, 213.