This work does not profess to be a treatise on the subject of feeling, but merely a series of studies, and rather tentative ones at that. I have attempted to deduce from the standpoint of biologic evolution the origin and development of feeling, and then to consider how far introspection confirms these results. I am well aware that I traverse moot points—what points in psychology are not moot?—and I trust that the position taken will receive thorough criticism. I should be very glad to have new facts adduced, whatever way they may bear. I have no theory to defend, but the results offered are simply the best interpretation I have as yet been able to attain.

viSome of the material of this book has appeared during the last ten years in the pages of Mind, Monist, Science, Philosophical Review and Psychological Review, but my contributions to these periodicals have in many cases been largely re-written.
Hiram M. Stanley.

Lake Forest, Illinois, U S.A.