Induction, and its rationale, depends also very largely upon conception and its intimate consequences, denomination, attribution, and relationising. Deduction and the Syllogism are trite themes, although the part that attribution plays in the process has been insufficiently noticed, and although the rules of deduction from relation-terms, the most important and fruitful of all, are as yet very partially ascertained. What is needed as an indispensable prerequisite to this last, seems to be a census and classification of the manifold relations that are known, after the model of say Roget's Thesaurus, and then a determination of the consequences of such combinations and constructions as are admissible and fruitful, and a tabulation of the same as our multiplication table is a tabulation of the consequences of the multiplication of numbers. The Logic of Relatives as it is called suffers from its having been formed thus far on so very abstract and formal a plan that its formation lacks the check and correction of frequent comparison with concrete knowledge, while its results are almost if not quite useless owing to their extreme generality, which in defect of the mediate formula leaves them inapplicable to aught that can manifest their utility or power. F. C. R. THE TIME-RELATIONS OF MENTAL PHENOMENA. By _Joseph Jastrow_. New York: N. D. C. Hodges. The accomplished Professor of Psychology at the University of Wisconsin gives in this publication, which forms one of the series of "Facts and Theory Papers" issued by Mr. Hodges, the results of numerous observations by Cattell, Münsterberg and other observers. His object is to present a general view of what has been done already in this department of research. The study of the time-relations of mental phenomena is of importance in various connections. As Professor Jastrow remarks: "It serves as an index of mental complexity, giving the sanction of objective demonstration to the results of subjective observation; it indicates a mode of analysis of the simpler mental acts, as well as the relation of these laboratory products to the processes of daily life; it demonstrates the close interrelation of psychological with physiological facts, an analysis of the former being indispensable to the right comprehension of the latter; it suggests means of lightening and shortening mental operations, and thus offers a mode of improving educational methods; and it promises in various directions to deepen and widen our knowledge of those processes by the complication and elaboration of which our mental life is so wonderfully built up."