beyond' the subject's brain 'without being transformed. Nevertheless, like any other force, it cannot remain isolated; like any other force it escapes, but in disguise. Orthodox science allows it only one way out, the motor nerves. These are the holes in the dark lantern through which the rays of light escape. * * * Thought remains in the brain, just as the chemical energy of the galvanic battery remains in the cells, but each is represented outside by its correlative energy, which in the case of the battery is called the electric current, but for which in the other we have as yet no name. In any case there is some correlative energy--for the currents of the motor nerves do not and cannot constitute the only dynamic equivalent of cerebral energy--to represent all the complex movements of the cerebral mechanism.'" The above hypothesis may, or may not, afford a clue to the mysterious phenomena of telepathy, but it will doubtless satisfy to some extent those thinkers who demand physical explanations of the known and unknown laws of the universe. The president of the Society for Psychical Research (1894,) A. J. Balfour, in an address on the relation of the work of the Society to the general course of modern scientific investigation, is more cautious than the writers already quoted. He says: "Is this telepathic action an ordinary case of action from a center of disturbance? Is it equally diffused in all directions? Is it like the light of a candle or the light of the sun which radiates equally into space in every direction at the same time? If it is, it must obey the law--at least, we should expect it to obey the law--of all other forces which so act through a non-absorbing medium, and its effects must diminish inversely as the square of the distance. It must, so to speak, get beaten out thinner and thinner the further it gets removed from its original source. But is this so? Is it even credible that the mere thoughts, or, if you please, the neural changes corresponding to these thoughts, of any individual could have in them the energy to produce sensible effects equally in all directions, for distances which do not, as far as our investigations go, appear to have any necessary limit? It is, I think, incredible; and in any case there is no evidence whatever that this equal diffusion actually takes place. The will power, whenever will is used, or the thoughts, in cases where will is not used, have an effect, as a rule, only upon one or two individuals at most. There is no appearance of general diffusion. There is no indication of any disturbance equal at equal distances from its origin and radiating from it alike in every direction.