themselves as a psychical complex of the most complicated superstructure. Their parts stand in the most diverse relationship to each other; they form backgrounds and foregrounds, stipulations, digressions, illustrations, demonstrations, and protestations. It may be said to be almost the rule that one train of thought is followed by its contradictory. No feature known to our reason whilst awake is absent.

If a dream is to grow out of all this, the psychical matter is submitted to a pressure which condenses it extremely, to an inner shrinking and displacement, creating at the same time fresh surfaces, to a selective interweaving among the constituents best adapted for the construction of these scenes. Having regard to the origin of this stuff, the term regression can be fairly applied to this process. The logical chains