We are indebted to the Messrs. Westermann, of this city, for the ninth and tenth parts of Dr. ANDREE'S admirable work, entitled, _Amerika_, of which we have before spoken at length. These parts conclude the first volume, of 810 octavo pages, printed with an elegance which, among us, is not generally attributed to German books. This volume is devoted to North America, and these two parts, are divided into chapters upon:--the New England States; the Middle States; the Southern Atlantic States; the South on the Gulf of Mexico; the Western Slave States; the Non-slaveholding, West and North; the Far West, and the Pacific Coast. Each state and territory is treated with extreme clearness and comprehensiveness, and with a correctness that seems astonishing, when we consider that the book was written in Germany. This volume is dedicated to Dr. Hermann E. Ludewig, of this city, in three or four pages, giving an account of the motives which induced Dr. Andree to write the work; we translate the dedicatory paragraph: "This book, honored sir, I dedicate to you. The literature of North American history is greatly indebted to your valuable labors; for these ten years no small part of your time has been devotedly spent in disinterestedly aiding, by advice and assistance, our emigrating countrymen on their arrival in New-York. In your new country, which you understand so keenly and so profoundly, you are still a cultivator of German science, holding your old fatherland in appropriate honor. You are in America a worthy and most estimable representative of German culture and German integrity. Receive friendly this inscription, and the cordial greetings I send you beyond the sea!" We trust the other volumes of this work may speedily appear: the second will be upon Mexico and Central America, and the third upon South America. * * * * * SPINOZA'S _Tractatus Politicus_ is the subject of a work recently published at Dessau, by J. E. HORN. The author defends Spinoza's political ideas as of a practical nature, and not at all connected with the analogous theories of modern German metaphysicians. The work is the result of much thought, and of all the industry which seems to belong to every scholar of Germany. Another work on Spinoza, is by Professor ZIMMERMANN of Olmütz, and is entitled, _Uber einige logische Fehler der spinozistischen Ethik_. It attempts to prove at length that the syllogistic method of the great Jew can only be correct on the supposition that in substance the idea and the reality are coincident, which supposition Spinoza himself expressly affirms. The radical fault of this method, according to the Professor, is the application of mathematical demonstration to things not susceptible thereof. On the whole this publication adds little to the treasures of philosophy.