Arka Kapak Yazısı: This matter of association by relation is one of the most important things in the whole subject of thought, and the degree of correct and efficient thinking depends materially upon it. It does not suffice us to merely "know" a thing—we must know where to find it when we want it. As old Judge Sharswood, of Pennsylvania, once said: "It] is not so much to know the law, as to know where to find it." Kay says: "Over the associations formed by contiguity in time or space we have but ...