The conduct of the trial, the duties of all persons concerned, members, judge-advocate, prisoner, witnesses, counsel, etc., are given in detail, and will be very easily learned. Forms of orders for convening courts-martial, modes of recording the proceedings, the form of a general order confirming or disapproving the proceedings, the form of the judge-advocate's certificate, and the forms of charges and specifications under different articles of war, are given in the Appendix, and are used _verbatim_ by all judge-advocates and recorders. There are also explanations of the duties of courts of inquiry, and of boards for retiring disabled officers; and extracts from the Acts of Congress bearing upon military law. The Articles of War are also given for reference. The book is thus rendered complete as a manual for the conduct of courts-martial, from the original order to the execution of the sentence. From what has been said, it will be gathered that the work was needed, that it admirably supplies the need, and that it may be recommended, without qualification, as providing all the information which it purports to provide, and which could be demanded of it, in a lucid, systematic, and simple manner. It is an octavo volume, containing 377 pages, clearly printed in large type, and on excellent paper; the binding is serviceable, being in strong buff leather, like other law-books. _Lectures on Moral Science_. Delivered before the Lowell Institute, Boston. By MARK HOPKINS, D.D., LL.D. Boston: Gould and Lincoln. 12mo. It is a little curious that there is not a single science in which man is constitutionally, and therefore directly interested, to which Emanuel Kant has not, in one way or another, written a _Prolegomena_. Professionally he did so in the case of Metaphysic: and out of the great original claim which he here established there emanates a separate claim, in each particular science of the order already indicated, to a sublime dictatorship. And chiefly is this claim valid in Moral Philosophy; for it was his province, the first of all men, clearly to reveal, as a scientific fact certified by demonstration, the divine eminence of the practical above the merely speculative powers of man,--the fulfilment of which mission justly entitled him to all the privileges incident to the vantage-ground thus gained,--privileges widely significant in a survey of that field where chiefly these practical powers hold their Olympian supremacy, the field of Moral Philosophy.