INTRODUCTORY. 



logical and scientific procedure, and as a justifica- 

 tion of this attempt to introduce new inquiries into 

 the nerve-system. I have omitted any attempt 

 at cerebral localization, and do not think that the 

 present work has greatly suffered thereby. The 

 work done by others in that direction has been of 

 immense service to me, and possibly this work 

 may indirectly forward that most desirable inquiry. 

 Many purely medical facls might have been intro- 

 duced, but it appeared best not to produce them in 

 this volume. 



The present work has been sent out under its 

 present title as an instalment of a larger work in 

 hand. I think that the accurate observation of the 

 motor outcome of brain action, and the observation 

 of the effects of external forces upon such func- 

 tions, will give us much information as to the effect 

 of physical forces in causing the evolution of 

 the individual, and the development of mind by 

 educational processes. 



Glancing over the succeeding chapters,. they may 

 be classified as follows : 



The first five chapters explain the scope and 

 general method of the work. The scope and 

 meaning of the term " expression " is explained to 

 include all outward manifestations of hidden things. 

 Thus it is seen that vital phenomena can only be 

 studied by their expressions, or physical signs ; on 

 the contrary, all vital and inscrutable phenomena 

 may be studied by these expressions, if we know 

 how to observe and record the physical signs of 

 the expression. 



