=Focalized Recall, or Association by Similarity.=--In partial or mixed association we have all along supposed the interesting portion of the disappearing thought to be of considerable extent, and to be sufficiently complex to constitute by itself a concrete object. Sir William Hamilton relates, for instance, that after thinking of Ben Lomond he found himself thinking of the Prussian system of education, and discovered that the links of association were a German gentleman whom he had met on Ben Lomond, Germany, etc. The interesting part of Ben Lomond as he had experienced it, the part operative in determining the train of his ideas, was the complex image of a particular man. But now let us suppose that the interested attention refines itself still further and accentuates a portion of the passing object, so small as to be no longer the image of a concrete thing, but only of an abstract quality or property. Let us moreover suppose that the part thus accentuated persists in consciousness (or, in cerebral terms, has its brain-process continue) after the other portions of the object have faded. _This small surviving portion will then surround itself with its own associates_ after the fashion we have already seen, and the relation between the new thought's object and the object of the faded thought will be a _relation of similarity_. The pair of thoughts will form an instance of what is called '_association by similarity_.' The similars which are here associated, or of which the first is followed by the second in the mind, are seen to be _compounds_. Experience proves that this is always the case. _There is no tendency on the part of_ SIMPLE _'ideas,' attributes, or qualities to remind us of their like_. The thought of one shade of blue does not summon up that of another shade of blue, etc., unless indeed we have in mind some general purpose of nomenclature or comparison which requires a review of several blue tints.