It needs very little argument to convince the average thinking person of the great magnitude 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