ABSTRACT
So far we have alluded only casually to memory, to that apparent revival of past experience to which the richness and complexity of experience is due. Every stimulus which is ever received leaves behind it, so it is said, an imprint, a trace capable of being revived later and of contributing its quota to consciousness and to behaviour. To these effects of past experience the systematic, the organized character of our behaviour is due; the fact that they intervene is the explanation of our ability to learn by experience. It is a way peculiar to living tissue by which the past influences our present behaviour across, as it might appear, a gulf of time.
