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The medium-trance is, therefore, probably a hypnotic or mesmeric trance, induced telepathically by operators out of the body. When the trance has been induced, however, how does the "spirit" succeed in imparting information to the medium's brain and organism?
Why should the peculiar condition involved be instrumental in producing such striking results? It must be admitted at once that the innermost nature of this trance state is unknown. Certainly no purely physiological explanation suffices to explain the "medium-trance," even were it sufficient to account for similar conditions better known.