"A systematic examination was made of the personal consciousness in hypnosis regarding the perceptions and content of the secondary consciousness during definite moments, of which the events were prearranged or otherwise known, the subject not being in absent-mindedness. It is not within the scope of an address of this sort to give the details of these observations, but in this connection I may state briefly a summary of the evidence, reserving the complete observation for future publication. It was found that— "1. A large number of perceptions—visual, auditory, tactile, and thermal images, and sometimes emotional states—occurred outside of the personal consciousness and, therefore, the subject was not conscious of them when awake. The visual images were particularly those of peripheral vision, such as the extra-conscious [marginal or ultra-marginal] perception of a person in the street who was not recognized by the personal waking consciousness; and the perception of objects intentionally placed in the field of peripheral vision and not perceived by the subject, whose attention was held in conversation. Auditory images of passing carriages, of voices, footsteps, etc., thermal images of heat and cold from the body were similarly found to exist extra-consciously, and to be entirely unknown to the personal waking consciousness. "2. As to the content of the concomittant (dissociated) ideas, it appeared, by the testimony of the hypnotic self, that as compared with those of the waking consciousness the secondary ideas were quite limited. They were, as is always the experience of the subject, made up for the most part of emotions (e. g., annoyances), and sensations (visual, auditory, and tactile images of a room, of particular persons, people’s voices, etc). They were not combined into a logical proposition, though in using words to describe them it is necessary to so combine them and therefore give them a rather artificial character as ‘thoughts.’ It is questionable whether the word ‘thoughts’ may be used to describe mental states of this kind, and the word was used by the hypnotic self subject to this qualification. Commonly, I should infer, a succession of such ‘thoughts’ may arise, but each is for the most part limited to isolated emotions and sensorial images and lacks the complexity and synthesis of the waking mentation.