Literary Notices. cxxxi 



treatment is the same. The author's statement made in the introduc- 

 tion to the articles just mentioned (April, 1891) that "Just what ex- 

 periments such a course should contain is itself as yet a matter of ex- 

 periment " is still true perhaps but certainly not to the same extent as 

 then. This series of experiments, at least, has stood the test of sev- 

 eral years of practical use ; and the psychological laboratories so rap- 

 idly springing up in all of our best colleges emphasize the necessity 

 for such a manual, adapted to the needs of undergraduate students 

 rather than for advanced research courses. With this apparently in 

 mind the author has selected for the most part subjects suitable for 

 demonstration before a class or for rapid individual verification, rather 

 than problems involving elaborate experimental and inductive pro- 

 cesses. So also simple apparatus is employed wherever possible. In 

 fact, one of the most practical features of the book is the skill dis- 

 played in directing precise experiments with the use of simple pieces, 

 most of which can, if necessary, be made by the instructor himself. 

 Another feature of the greatest helpfulness is the full citations of liter- 

 ature found at the close of each chapter. The 169 experiments out- 

 lined are all on the senses and are chiefly qualitative determinations 

 rather than exact quantitative measurements. 



Professor William O. Krohn's "Practical Lessons in Psychol- 

 ogy ' n is one of the volumes in The Working Teacher's Library and 

 well deserves a place in the hands, not merely of every public school 

 teacher, but of the hundreds of other people who desire to see the 

 practical applications of what is newest and best in the "new Psy- 

 chology" clearly set forth without formality or unnecessary technical- 

 ity. Most of the chapters are based on lectures delivered before vari- 

 ous gatherings of teachers and to this is due not only the fresh and 

 colloquial style and studied simplicity, but also a certain element of 

 diffuseness and repetition. We very rarely find a book which so suc- 

 cessfully meets the requirements of the general non-technical public 

 and at the same time comes into touch so closely with the original 

 sources. It is thoroughly up to date and the author seems to have 

 swept the whole horizon of psychological research until the very day 

 of publication. Comparative psychology is duely recognized and the 

 treatment of child-psychology is especially full and practical. In fact 

 every page fulfils the promise made at the start " that the book shall 

 be characterized by a practical ring rather than a scholastic rattle." 



c. j. H. 



1 Chicago, The Werner Company, 1894. 



