CHANGES IN THE CIRCULATION. 311 



ing, singing, and so forth, and make himself thoroughly familiar with 

 its natural history, without learning anything of its anatomy, the laws 

 of muscular contraction or digestion, so also the philosopher may in- 

 vestigate the actions of the mind, the succession and relations of ideas, 

 or may formulate the principles of logic, in entire ignorance of the 

 processes which occur in the brain. The conclusions in both cases may 

 be perfectly accurate, but they do not concern the more hidden and 

 less accessible factors. 



It is important to recognize the relation of psychology to the physi- 

 ology of the brain, and to relegate both to their proper places. In re- 

 ality they are only the different sides of one study and the best dis- 

 tinction of psychology is its success in arranging and classifying the 

 psychic phenomena, whose relation to the physical basis of mind is to 

 be determined. Although psychology is usually regarded as a de- 

 partment of philosophy, it is certainly more completely a natural science, 

 since it deals with natural events, which are learned by direct observa- 

 tion, and which we coordinate by our reason. The slow but unmis- 

 takable gravitation of psychology toward physiology does not fore- 

 cast, it seems to me, the demise of the former, but indicates rather that 

 psychologists, having now gathered and arranged a great mass of data 

 concerning the mind, are making an inevitable step in progress in seek- 

 ing deeper than ever before for explanations. During the new phase, 

 into which psychology has apparently entered, the principal problems 

 will probably concern the relation of mind to the substratum of matter 

 in which it displays itself. The most important steps which we can 

 hope to take at present must, as far as we can judge, be taken in the 

 field of physiological psychology, the essential purpose of which is to 

 discover the exact nature of the dependence of the psychic phenomena 

 on the physiological and anatomical properties of the body. It is pre- 

 cisely in this direction that Professor Mosso has made an important 

 advance. 



Mind appears to us as an image, dimly seen through the clouds of 

 physical facts which encompass it. Some assert it to be merely a 

 mirage, or, at most, an accidental shape into which physical facts have 

 compiled themselves. Others believe that mind is a thing of its own 

 kind. When the sunlight of discovery shall dispel the mists of the 

 unknown, that conceal the true nature of the mind, then that image, 

 now so dim, will become distinct, and its real character evident. That 

 such a result is attainable is the belief, without which many laborious 

 investigations would become purposeless. 



