IV NOMENCLATURE OF MENTAL OPERATIONS 109 



which the idea of that which is remembered is 

 related by co-existence with other ideas, and by 

 antecedence with present impressions. 



If I say I remember A. B., the chance acquaint- 

 ance of ten years ago, it is not because my idea of 

 A. B. is very vivid on the contrary, it is extremely 

 faint but because that idea is associated with 

 ideas of impressions co-existent with those which 

 I call A. B. ; and that all these are at the end of 

 the long series of ideas, which represent that 

 much past time. In truth I have a much more 

 vivid idea of Mr. Pickwick, or of Colonel New- 

 come, than I have of A. B. ; but, associated 

 with the ideas of these persons, I have no idea 

 of their having ever been derived from the world 

 of impressions ; and so they are relegated to the 

 world of imagination. On the other hand, the 

 characteristic of an imagination may properly be 

 said to lie not in its intensity, but in the fact, that 

 as Hume puts it, " the arrangement," or the 

 relations, of the ideas are different from those in 

 which the impressions, whence these ideas are de- 

 rived, occurred ; or in other words, that the thing 

 imagined has not happened. In popular usage, 

 however, imagination is frequently employed for 

 simple memory " In imagination I was back in 

 the old times." 



It is a curious omission on Hume's part that 

 while thus dwelling on two classes of ideas, 

 Memories and Imaginations, he has not, at the 



