CONFORMITY WITH PLAN 293 



(ii 12)_AU_ ^j^.g means that, in place of the action 



R MOI AO E ,, ,• R MOIi AO E _^ , 



■r — ~~ T ~ T ' ^^^ action j — ~" I "~ I ^^ ^^ 



performed ; and so forth. 



In all forms of action is revealed the close connection 

 between the individual organs and their associated impulse- 

 systems. But while the connection of the separate parts of 

 the framework within the organ, as well as of the organs 

 among themselves, is obvious to the inquiring eye, this is 

 not the case with the impulse-systems, which can be revealed 

 only by experimental methods. 



So long as we content ourselves with including in rules 

 what has been learnt through experiment concerning the 

 inner connections, we require no further auxiliary concept 

 in order to base the connection within a rule. This is already 

 given by the concept of the regularity of the rule itself. But 

 as soon as we transform the rule into an impulse-system, in 

 the attempt to see how it affects the protoplasm, we have 

 need of some idea which shall help us to visualise the unity 

 within an impulse-system, as well as the unity among the 

 impulse-systems considered collectively. For this purpose, 

 I choose the idea of internal equilihrium, which seems to me 

 to express more clearly what one usually understands by 

 correlation. 



FUNCTIONAL AND GENETICAL BUILDING-STONES 



Before I go on to speak of what has been learnt by experi- 

 mental research concerning the internal equilibrium of the 

 impulse-systems, I must discuss in more detail an idea that 

 has already been treated of in another connection — the idea 

 of functional building-stones. If I write down the simplest 



action-rule of the reflex j - j — t - t , I have, in so doing, 



broken up the whole reflex arc into functional building-stones. 



