further advance can enlightenment and improvement be brought about. I shall pick out one of the constellations leading to the formation of dreaMs. We have learned that the dream replaces a number of thoughts derived from daily life which are perfectly formed logically. We cannot therefore doubt that these thoughts originate from our normal mental life. All the qualities which we esteem in our mental operations, and which distinguish these as complicated activities of a high order, we find repeated in the dream thoughts. There is, however, no need of assuming that this mental work is performed during sleep, as this would materially impair the conception of the psychic state of sleep we have hitherto adhered to.

These thoughts may just as well have originated from the day, and, unnoticed by our consciousness from their