or according to the activities with which they have to do. Simultaneous attention may be trained by such games as "Hide-the-thimble" or Jack-straws, and homogeneous attention may be trained by some such action as hammering nails in the upper left hand corners of all the squares on a board. Imagination is developed by retelling stories, and invention by solving puzzles; voluntary memory is strengthened by writing original rhymes and automatic memory may be strengthened by having the child write out a list of all the things in his kitchen or any other room with which he may happen to be familiar. Different types of backward children are described and a few pages are devoted to a discussion of hysteria. It is a book which will, in all probability, arouse considerable discussion and which will find some warm friends and some determined enemies. As one more publication calling attention to this important problem, it is of great value and it will probably be read more widely than any other book in this field which has appeared. Perhaps its greatest practical value lies in its suggestiveness as to the ways in which one may use his personality and initiative in dealing with backward children, rather than sticking so closely to prescribed tests and methods. RAYMOND BELLAMY. Emory & Henry College, Emory, Va. CONTINUITY: THE PRESIDENTIAL ADDRESS TO THE BRITISH ASSOCIATION FOR 1913. By Sir Oliver Lodge. G. P. Putnam s Sons, New York and London, 1914. Pp. v, 131. The most obvious particular wisdom of the present scientific period is undoubtedly just that concept denoted by the title of this volume, continuity. And this wisdom is advanced wisdom and, withal, wisdom which is very expedient and even indispensable at this day, as a reaction required to set right the over-specialization of recent minds thoughtful only of some little branch of knowledge. Just in proportion as one esteems "authority" will one give heed to the pronouncement of the presidential address before the British Association, yet for its own intrinsic sake it is a piece of work which cannot be ignored.