Page:Outlines of Psychology (Wundt) 1907.djvu/13

  AUTHOR’S PREFACE TO THE GERMAN EDITIONS FROM THE FOURTH TO THE SEVENTH.

THE fourth edition contained more additions and minor revisions than did the second and third editions. The chief change is one which I introduced in compliance with a request that has frequently been made; this change consists in the addition of brief lists of reading references at the end of each of the sections and chief divisions. These references, in keeping with the general character of the book, must of course be limited to the most important contributions to the discussions in question; and not all the important references can be given, but those must be selected which will furnish the reader who wishes to go into the subject more thoroughly with easy means of finding further references for his study. Sections of my “Grundzüge der physiologischen Psychologie”, and my “Vorlesungen über die Menschen- und Tierseele”, which have been included in these lists of references are cited from the fifth and third editions respectively, and are referred to by abbreviated titles ).