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 VI. NEW BOOKS. [These Notes do not exclude Critical Notices later on,] The Methods of Ethics. By HENRY SIDGWICK, Knightsbridge Professor of Moral Philosophy in the University of Cambridge. Third Edition. London : Macinillan, 1884. Pp. xxx., 505. A Supplement to the Second Edition of the Methods of Ethics. Containing all the important Additions and Alterations in the Third Edition. Pp. viii., 184. The Methods of Ethics, which appeared in the Second Edition of about the same size as in the First, though the changes, as set out also in a separate Supplement, were very considerable, has now undergone a still more thorough revision, with changes which, though not extending to the whole 184 pp. of the new Supplement, again separately issued for the con- venience of possessors of the previous editions, add, when the final balance ruck, quite 30 pp. to the size of the original work. The new matter will, it is hoped, very soon be duly examined in these pages, where former editions of the work have not been overlooked. Meanwhile the author's own account of the distinctive features of the present issue is quoted : " In this third edition, I have again made extensive alterations, and intro- duced a considerable amount of new matter. Some of these changes and additions are due to modifications of my own ethical or psychological vie^s : but I do not think that any of these are of great importance in relation to the main subject of the treatise. And by far the largest part of the new matter introduced has been written either (1) to remove obscurities, ambiguities, and minor inconsistencies in the exposition of my views which the criticisms of others or my own reflection have enabled me to discover ; or (2) to treat as fully as seemed desirable certain parts or aspects of the subject which I had either passed over altogether or dis- cussed too slightly in my previous editions, and on which it now appears to me important to explain my opinions, either for the greater complete- ness of my treatise, according to my own view of the subject, or for its better adaptation to the present state of ethical thought in England. The most important changes of the first kind have been made in chaps. 1 and 9 of Book i. [' Introduction,' ' Good '], chaps, 1 3 of Book iL [' Principle and Method of Egoism,' ' Empirical Hedonism'], and chaps. 13 and 14 of Book iii. [' Philosophical Intuitionism.' ' The Sutnmum Bonum '] : under the second head I may mention the discussions of the relation of intel- lect to moral action in Book i. chap. 3, of volition in Book i. chap. 5, of the causes of pleasure and pain in Book ii. chap. 6, of the notion of virtue in the morality of Common Sense in Book iiL chap. 2, and of evolutional ethics in Book iv. chap. 4 (chiefly).'' Proctedinas of the Society for Psychical Research. Parts iv.-vi London : Triibner, 1883, 4. Since reference was last made in MDTD XXXII., 621, to the Proceed- ings of this Society, three more Parts have appeared. In these are especially to be noted the accounts of " Experiments on Thought-Trans- ference," by Mr. Malcolm Guthrie of Liverpool (iv., v.), followed by the account of Prof. Lodge's further trials with Mr. Guthrie's two chief " per- cipients ". Whatever interpretation is to be put upon the facts reported,