SENSORY AND RATIONAL DISCRIMINATION 131 



tivc exercise, concerned with observational science, 

 and with strivings towards an ethical ideal. 



These outlines of research show how essential for 

 advance of a true science of Nature is a classifi 

 cation of the sciences. Whatever the value of our 

 modern watchword continuity, the need for division 

 of labour remains with us, as also the need for classifi 

 cation of functions. Physiology and psychology are 

 concerned with distinct phases of existence. Beyond 

 doubt, man belongs to Nature ; but it is impossible to 

 explain his activity within the area of the natural 

 sciences. A doctrine of the soul must be distinct 

 from a doctrine of organic function. 



It follows that final results cannot be reached, 

 through research into what has been named the 

 mechanism of thought/ or the physics of thought 

 and movement. Research of this kind is needful for 

 a true knowledge of our life. In this department of 

 inquiry, our obligations to Ferrier, and Wundt, and 

 Mlinsterberg are very great. But for full interpreta 

 tion of the causality of human life, as presented in 

 the ordinary consciousness of the race, we require a 

 department of science, which shall constitute a true 

 Psychology, distinct from Physiology. Appreciation 

 of the facts brought to light by experimental psycho 

 logy demands this. The facts of consciousness disclose 

 a vast region of inquiry, lying quite beyond the sphere 

 of experimental psychology. 



All that is carried into the physiological laboratory 

 belongs to the physics of thought and action. In 

 vestigation is concerned with the mechanism of sen 

 sibility and motion, with apparatus whose efficiency 

 has its explanation in chemical, or molecular, or 



