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 NEW BOOKS. 123 among so colled synonyms. This is of course a " Dictionary" but not what one expects in these days of lexicographical specialising. As to its execution : Dr. Eisler's limitations are very evident. He has gone through many works, marking and copying pregnant sentences on this topic and that ; but his reading is mainly, almost entirely, German. Of English authors he cites works which have been translated into German or which are cited by German authors he has consulted. For example, Bain and Spencer are quoted the rest not ! As to living writers, the result is surprising. For example, under the psychological headings I find James's name twice no doubt a more diligent search would discover it twice again and in one of these references, James is put down with Bain, as a Vertreter of Associationism ! Now it is simply inexcusable for any man in these days to call himself educated in philosophy who cannot read the three great languages of literary Europe ; and to publish a work of a historical character on philosophische Grund- begrijf'e under such a limitation is to invite unsparing criticism. Again, the citations are of every degree of value from boiling down to zero. Some are detached sentences, worse than worthless separated from their context. Others are merely descriptive remarks not intended by the writer as definitions at all. All these are printed side by side, and the student finds himself " rich in the riches of confusion ". Moreover, certain favourite writers (notably Wundt) are cited everywhere from Alpha to Omega. Yet the service of the book remains. In the hands of the philosophi- cal expert it serves a double purpose. It brings to his door many good things which he would otherwise have to spend many hours in seeking. And better it presents, on the whole, under some of the main topics, data for a general view of the progress of a conception in history as em- bodied in quotations from the leading philosophers. But the student should beware of being misled by its single citations. In the references a high degree of accuracy has been attained, and the. publishers' work is all that could be desired. Furthermore, the list of terms seems fairly exhaustive for philosophy proper not for experi- mental psychology however and some English terms are included, yet without sufficient indication especially in case of Latin forms, e.g. ' emotion ' as to whether or not the same form is used in German. J. MARK BALDWIN. Aristoteles. Von. H. SIEBECK (Frommanns Klassiker der Philosophic, No. 8.) Stuttgart : Fr. Frommann, 1899. Pp. 142. This excellent little account of the greatest of ancient philosophies deserves to be widely known in England, where there is a curious dearth of works upon the principles of Aristotelianism as distinguished from monographs upon special points. Teachers who have to lecture upon the History of Ancient Philosophy will find Herr Siebeck's clear and concise presentation of the main doctrines of Peripateticism exceedingly useful for their own special purposes, and it may also be put with great profit into the hands of then- more intelligent pupils ; for the dullards its very conciseness will probably make it a little too difficult. It is no disparagement of a work of long-proved merit to say that Siebeck's book will be all the more welcome among us that it is written from another point of view than the well-known " Outlines " of the late Edwin Wallace, and seeks to measure Aristotelianism by comparison more with modern natural science than with later idealistic metaphysics. The brilliant account of Aristotle's metaphysical principles and their physical