It is interesting to see that these sensations of pressure, mounting, so to speak, to the level of our visual field and taking advantage of the luminous dust which fills it, effect its transformation into forms and colors. M. Max Simon tells of having a strange and somewhat painful dream. He dreamt that he was confronted by two piles of golden coins, side by side and of unequal height, which for some reason or other he had to equalize. But he could not accomplish it. This produced a feeling of extreme anguish. This feeling, growing moment by moment, finally awakened him. He then perceived that one of his legs was caught by the folds of the bedclothes in such a way that his two feet were on different levels and it was impossible for him to bring them together. From this the sensation of inequality, making an irruption into the visual field and there encountering (such at least is the hypothesis which I propose) one or more yellow spots, expressed itself visually by the inequality of the two piles of gold pieces. There is, then, immanent in the tactile sensations during sleep, a tendency to visualize themselves and enter in this form into the dream. More important still than the tactile sensations, properly speaking, are the sensations which pertain to what is sometimes called internal touch, deep-seated sensations emanating from all points of the organism and, more particularly, from the viscera. One cannot imagine the degree of sharpness, of acuity, which may be obtained during sleep by these interior sensations. They doubtless already exist as well during waking. But we are then distracted by practical action. We live outside of ourselves. But sleep makes us retire into ourselves. It happens frequently that persons subject to laryngitis, amygdalitis, etc., dream that they are attacked by their affection and experience a disagreeable tingling on the side of their throat. When awakened, they feel nothing more, and believe it an illusion; but a few hours later the illusion becomes a reality. There are cited maladies and grave accidents, attacks of epilepsy, cardiac affections, etc., which have been foreseen and, as it were, prophesied in dreams. We need not be astonished, then, that philosophers like Schopenhauer have seen in the dream a reverberation, in the heart of consciousness, of perturbations emanating from the sympathetic nervous system; and that psychologists like Schemer have attributed to each of our organs the power of provoking a well-determined kind of dream which represents it, as it were, symbolically; and finally that physicians like Artigues have written treatises on the semeiological value of dreams, that is to say, the method of making use of dreams for the diagnosis of certain maladies. More recently, M. Tissie, of whom we have just spoken, has shown how specific dreams are connected with affections of the digestive, respiratory, and circulatory apparatus.