It needs very little argument to convince the average thinking person of the great importance of memory, although even then very few begin to realize just how important is the function of the mind that has to do with the retention of mental impressions. The first thought of the average person when he is asked to consider the importance of memory, is its use in the affairs of every-day life, along developed and cultivated lines, as contrasted with the lesser degrees of its development. In short, one generally thinks of memory in its phase of ‘a good memory’ as contrasted with the opposite phase of ‘a poor memory.’ But there is a much broader and fuller meaning of the term than that of even this important phase.