tortured by hunger in the redoubt at Magdeburg, likewise saw himself surrounded by wonderful meals, and George Back, who took part in Franklin's first expedition, dreamed regularly and consistently of luxurious meals when, as a result of terrible privations, he was nearly dead of hunger." A man who feels great thirst at night after enjoying highly seasoned food for supper, often dreams that he is drinking. It is of course impossible to satisfy a rather strong desire for food or drink by means of the dream; from such a dream one awakes thirsty and must now drink real water. The effect of the dream is in this case practically trifling, but it is none the less clear that it was called up for the purpose of maintaining the sleep in spite of the urgent impulse to awake and to act. Dreams of satisfaction often overcome needs of a lesser intensity. In a like manner, under the influence of sexual stimuli, the dream brings about satisfaction that shows noteworthy peculiarities. As a result of the characteristic of the sexual urge which makes it somewhat less dependent upon its object than hunger and thirst, satisfaction in a dream of pollution may be an actual one, and as a result of difficulties to be mentioned later in connection with the object, it happens especially often that the actual satisfaction is connected with confused or distorted dream content. This peculiarity of the dream of pollution, as O. Rank has observed, makes it a fruitful subject to pursue in the study of dream distortion. Moreover, all dreams of desire of adults usually contain something besides satisfaction, something that has its origin in the sources of the purely psychic stimuli, and which requires interpretation to render it intelligible. Moreover we shall not maintain that the wish-fulfillment dreams of the infantile kind occur in adults only as reactions to the known imperative desires. We also know of short clear dreams of this sort under the influence of dominating situations that arise from unquestionably psychic sources. As, for example, in dreams of impatience, whenever a person has made preparations for a journey, for a theatrical performance, for a lecture or for a visit, and now dreams of the anticipated fulfillment of his expectations, and so arrives at his goal the night before the actual experience, in the theatre or in conversation with his host. Or the well-named dreams of comfort, when a person who likes to prolong his sleep, dreams that he is already up, is washing himself, or is already in school, while as a matter of fact he continues sleeping, hence would rather get up in a dream than in reality. The desire for sleep which we have recognized as a regular part of the dream structure becomes intense in these dreams and appears in them as the actual shaping force of the dream. The wish for sleep properly takes its place beside other great physical desires.