_The Law of Contiguity includes what._--It is contended that this gives a wider extension to the law of contiguity in time and space than properly belongs to it. I reply, not wider than is intended by those who make use of this expression. Aristotle, the earliest writer who attempts any classification of the laws of suggestion, distinctly includes under the law of _coadjacence_ whatever stand as parts of the same whole, as, _e. g._, parts of the same building, traits of the same character, species of the same genus, the sign and the thing signified, different wholes of the same part, correlate terms, as the abstract and concrete, etc., etc. _Reference to the subjective Laws._--If it still is asked why does the minster of Strasburg, or any given object, suggest one of these several conceptions, and not some other in its place? the reason for this must doubtless be sought in the state of the mind at the time; in other words, in those subjective or secondary laws of suggestion, of which we have already spoken, as given by Brown and others. Aristotle has more concisely answered the question in the important rule which he adds as supplementary of his general law; viz., that, of two thoughts, one tends to suggest the other, in proportion, 1. To its comparative importance; 2. Its comparative interest. For the first reason, the foot is more likely to suggest the head than the head the foot. For the second reason, the dog is more likely to suggest the master than the master the dog. § II--MENTAL RECOGNITION, AS DISTINGUISHED FROM MENTAL REPRODUCTION. I. GENERAL CHARACTER OF THIS PROCESS. _The Faculty as thus far considered._--Thus far we have considered the faculty of mental representation only under one of its forms, viz., as _reproductive_. By the operation of this power, the intuitions of sense are replaced before the mind, in the absence of the original objects; images, so to speak, of the former objects of perception are brought out from the dark background of the past, and thrown in relief upon the mental canvas. Picture after picture thus comes up, and passes away. The mind has the power of thus reproducing for itself, according to laws of suggestion already considered, the objects of its former perception. This it is constantly doing. No small part of our thinking is the simple reproduction of what has been already, in some form, before the mind.