Ixxii Journal of Comparative Neurology. 



aginative process is essentially the same as that of the school girl who 

 constructs a story in which she as heroine passes through a variety of 

 episodes with Prince Charming. 



It seems that if a method could be found for measuring the extent 

 to which the "story" is objectivized and projected clear of the ego 

 and also the degree to which it is associated with purposive elements a 

 pedagogic value would be acquired. 



In the paper on syntesthesia the most valuable contribution is per- 

 haps the very full list of questions carefully tabulated and arranged. 



c. L. H. 



Kraepelin's Psycliologisclie Arbeiten. 



The first number of this volume contains a paper by the editor on 

 Psychological Experiments in Psychiatry, and one by A. Osborn entitled 

 Experimental Studies as a Contribution to Individual-Psychology. Nei- 

 ther of these admits of synopsis, while the remaining paper is referred 

 to elsewhere. The first "heft" is well-printed and forms a pamphlet 

 of over 200 pages devoted to the department of experimental psychol- 

 ogy requiring the most tedious experiments and involving the greatest 

 demands on good judgement and insight. It is to be hoped that the 

 subsequent numbers will fulfill the promise of the first. 



C. L. H. 



Influence of Fatigue on Psychical Processes.^ 



The results reached from a laborious study of bodily and mental 

 fatigue are summarized as follows : Mental exercise of addition for one 

 hour or physical exercise as in a two hours' walk results in a diminution 

 of mental power — as evidenced in the time occupied in recognition, 

 choice and association, and in the enfeeblement of memory and de- 

 crease of the amenabihty to practice. In the main, physical effort was 

 more influential than mental, so that gymnastics and walking cannot be 

 considered as refreshment from mental effort. After mental labor there 

 were symptoms of motor fatigue, after physical of central motor ex- 

 citability, the latter disappearing more quickly than the former. Great 

 fatigue (night experiments) produced in contrast to others, a depression 

 which continued several days. 



The evidence seems to show what practical experience has often 

 suggested, that the elements of mental fatigue are all corporeal. Prac- 

 tically, the beneficial effects of exercise lie on this side of excessive fa- 

 tigue whether mental or muscular. c. l. h. 



^Bettmann, S. Psychologische Arbeiten. Herausg. v. Emil Kraepelin. 

 Heidelberg, I, i, 1895. 



