580 



PISYCHOLOGY. 



similar association. A in each is the passing, B the coming 

 thought. In 'impartial,' all parts of A are equally opera- 



FlG. 41. 



tive in calling up B. In ' mixed,' most parts of A are inert. 

 The part M alone breaks out and awakens B. In ' similar,' 

 the focalized part M is much smaller than in the previous 



Fig. 42. 



case, and after awakening its new set of associates, instead 

 of fading out itself, it continues persistently active along 

 with them, forming an identical part in the two ideas, and 

 making these, pro tanfo, resemble each other. 



Fig. 43. 



Why a single portion of the passing thought should 

 break out from its concert Avith tlie rest and act, as we say, 

 on its own hook, why the other parts should become inert, 

 are mysteries which we can ascertain but not explain. Pos- 

 sibly a minuter insight into the laws of neural action will 



