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Rh chain a physical event—the changes in the cerebral tissues which are presumed to correspond to every act of thought or sensation. And it is not without interest to note in this connection that the arrangement of some of the nerve cells in the brain bears a superficial resemblance to the arrangement of particles in the "coherer" used for the reception of the message in wireless telegraphy. Again,

No such connection between thinking brains has been proved of course; but we have here a mechanism apparently sufficient for the purpose: sufficient at any rate to meet the objection urged by some that the establishment of telepathy would dislocate our entire conception of the physical universe. Nor does the fact that only certain persons, apparently, are affected by the telepathic impulse present any serious difficulty. For the brain of both agent and