We must not conclude, therefrom, that the impersonal consciousness is incapable of intelligent operation. No such thing; and events prove that the impersonal or subliminal consciousness is capable of accomplishing, with great perfection, the most complicated intellectual acts, without the personal consciousness being aware of it. In these cases, when the result of the operation is transmitted to the personal consciousness, this latter perceives it under the symbolical or dramatical form I pointed out. Observation shows, that all the features I have just described as being met with in cases where participation of the personal consciousness with our mental or physical activity is diminished, are to be found in hallucination and in dreams.[10] [10] Readers, interested to know my ideas on this point, will find them more extensively developed in my book, _L’Amnésie et les troubles de la conscience dans l‘épilepsie_. I beg to be excused for this digression; it was indispensable in order to develop, in a comprehensive manner, the analogies which are presented between dreams and hallucinations provoked by crystal-gazing, and the transcendental character which these visions can present, without being, however, supernatural. These considerations set forth, I arrive at the recital of some facts I have observed. The way in which imagination-images or hallucinations are induced, with most of the sensitives I have examined, is nearly always the same. I will describe it, pointing out at the same time that the formation of the hallucinatory image is the same in nearly every case, be the visual impression imaginary, or be it the expression of a true fact, past, present, or future. I have shown how to hold the crystal, and how to look at it. The sensitive, having fixed his eyes on the crystal for a few seconds or minutes—the time varies according to individuals—sees an opalescent, milky tint come over the crystal. I know a sensitive,—an intelligent and well-educated lady—who compares this impression, to that produced on the eye by rising mists and fleeting clouds. For her, the milky tint in the crystal is in movement. It breaks away like a cloud or mist, to disclose the hallucinatory image completely formed. To another sensitive, the cloud appears first of all immobile, and then becomes condensed into grey forms, which gradually become coloured and mobile. This sensitive enters so completely into the hallucination, that, as a rule, he thinks he is transported to the landscape he is gazing at; he has not only a hallucination of sight, but a hallucination of all the senses. Most people see the image in the crystal, but believe they see it life-size. The dimension of the crystal has no influence on the apparent dimension of the image;—at least, this is what I have nearly always remarked. What I say of the mode of induction of the image in the crystal can be applied to any other mode of induction—mirror, glass of water, decanter, etc.