activity. From the standpoint of the relationship of latent to manifest dream-content, dreams can be divided into three classes. We can, in the first place, distinguish those dreams which have a meaning and are, at the same time, intelligible, which allow us to penetrate into our psychical life without further ado. Such dreams are numerous; they are usually short, and, as a general rule, do not seem very noticeable, because everything remarkable or exciting surprise is absent.

Their occurrence is, moreover, a strong argument against the doctrine which derives the dream from the isolated activity of certain cortical elements. All signs of a lowered or subdivided psychical activity are wanting. Yet we never raise any objection to characterizing them as dreams, nor do we confound them with the products of our waking life.