=Dream and Civilization.=--The function of the brain which is most encroached upon in slumber is the memory; not that it is wholly suspended, but it is reduced to a state of imperfection as, in primitive ages of mankind, was probably the case with everyone, whether waking or sleeping. Uncontrolled and entangled as it is, it perpetually confuses things as a result of the most trifling similarities, yet in the same mental confusion and lack of control the nations invented their mythologies, while nowadays travelers habitually observe how prone the savage is to forgetfulness, how his mind, after the least exertion of memory, begins to wander and lose itself until finally he utters falsehood and nonsense from sheer exhaustion. Yet, in dreams, we all resemble this savage. Inadequacy of distinction and error of comparison are the basis of the preposterous things we do and say in dreams, so that when we clearly recall a dream we are startled that so much idiocy lurks within us. The absolute distinctness of all dream-images, due to implicit faith in their substantial reality, recalls the conditions in which earlier mankind were placed, for whom hallucinations had extraordinary vividness, entire communities and even entire nations laboring simultaneously under them. Therefore: in sleep and in dream we make the pilgrimage of early mankind over again. 13 =Logic of the Dream.=--During sleep the nervous system, through various inner provocatives, is in constant agitation. Almost all the organs act independently and vigorously. The blood circulates rapidly. The posture of the sleeper compresses some portions of the body. The coverlets influence the sensations in different ways. The stomach carries on the digestive process and acts upon other organs thereby. The intestines are in motion. The position of the head induces unaccustomed action. The feet, shoeless, no longer pressing the ground, are the occasion of other sensations of novelty, as is, indeed, the changed garb of the entire body. All these things, following the bustle and change of the day, result, through their novelty, in a movement throughout the entire system that extends even to the brain functions. Thus there are a hundred circumstances to induce perplexity in the mind, a questioning as to the cause of this excitation. Now, the dream is a _seeking and presenting of reasons_ for these excitations of feeling, of the supposed reasons, that is to say. Thus, for example, whoever has his feet bound with two threads will probably dream that a pair of serpents are coiled about his feet. This is at first a hypothesis, then a belief with an accompanying imaginative picture and the argument: "these snakes must be the _causa_ of those sensations which I, the sleeper, now have." So reasons the mind of the sleeper. The conditions precedent, as thus conjectured, become, owing to the excitation of the fancy, present realities. Everyone knows from experience how a dreamer will transform