traits, I can make that mass demonstrate them both optically and audibly; but, without those special sympathetic touches, it is silent and remains an inert mass. This result is obtained by physical contact between the instrument and the mass, but we will now carry this another step forward and deal with the subject of the action of Influence at a distance, or what may be called Prayer, between two of these rigid masses. From what we have already seen, it is clear that the Soul of man could not possibly pray with efficacy to a graven image; there is nothing in sympathy between them, and, without sympathetic action, influence is impossible; but it is quite possible for Matter to pray with efficacy to Matter, provided the material soul, if we may use the analogy, is brought into perfect sympathy with the material god, and I can now put before you an experiment showing this taking place. I have another heavy bar of iron, not so long but of the same thickness as the one already described, and have found its strongest characteristic; I have another small rubber, fashioned so that its characteristic is in perfect sympathy with that of the bar, namely, that the number of vibrations, in a second, of the instrument are exactly equal to those of the iron mass, and it is, therefore, as we saw in the last experiment, able by contact to influence the bar sympathetically. The slightest touch throws the bar into such violent vibration that a great volume of sound is produced, which can be heard a quarter of a mile away. The result of this sympathetic touch is far from being transient, in fact, the bar will continue to move, audibly, for a long time. This movement in the mass of iron was started by physical contact, but having once started the bar praying, willing, or thinking, whichever you like to call it, that bar now has the power to affect, without contact, another rigid bar of iron even when removed to great distances, provided the second bar possesses a similar characteristic, and that that characteristic has been brought into perfect _sympathy_ with that of the first bar. I have a second bar which fulfils these conditions, and, although, at the outset, it had no power whatever to respond, it has been gradually, as it were, educated, namely, brought nearer and nearer into sympathy with the first bar, until it is now able to respond across long distances; it has acted across the whole length of one of the largest halls in London so strongly that it could be heard by all present. We will now reverse the process of bringing these bars into sympathy, and I will throw the first out of harmony by slightly changing its characteristic; the change is extremely small, quite inappreciable to the human ear, the bar giving out as full and pure a note as it did before the alteration was made; in fact, the change is so slight that it can still, with a little force, be stimulated by the same generator, and yet the whole power to influence has been lost; the