Crystal or artificial visions are hallucinatory phenomena which, like automatic writing, can be cultivated by some people. The common technic is to have a person look into a crystal, at the same time concentrating the mind, or putting himself into a state of abstraction. Under these conditions the subject sees a vision, i.e., has a visual hallucination. The vision may be of some person or place, or may represent a scene which may be enacted. Because of the use of a crystal such hallucinations are called “crystal visions,” but a crystal is not requisite; any reflecting surface may be sufficient, or even the concentration of the attention. The crystal or other object used of course acts only by aiding the concentration of attention and by force of suggestion.—_The subconscious is tapped._ Footnote 21: Freud: Traumdeutung, 2 aufl. 1909. Footnote 22: Morton Prince: The Mechanism and Interpretation of Dreams. _The Journal of Abnormal Psychology_, October-November, 1910. Footnote 23: Zentralblatt für Nervenheilkunde und Psychiatrie; 1909, Heft 12. Footnote 24: According to Freud and his school it is always the imaginary fulfilment of a suppressed wish, almost always sexual. For our purposes it is not necessary to inquire into the correctness of this interpretation or the details of the Freudian theory. Footnote 25: For an example, see p. 98. Footnote 26: If the physiological interpretation be maintained, i.e., that the script was produced by a pure physiological process, this phenomenon would be a crucial demonstration of the nature of conservation, that it is in the form of physical alterations in nervous structure. I do not believe, however, that this interpretation can be maintained. LECTURE III CONSERVATION OF FORGOTTEN EXPERIENCES OF NORMAL, ARTIFICIAL, AND PATHOLOGICAL LIFE I. Normal Life (Continued)