As a suggestion to those interested in psychological researches I will mention that Keely has copied nature in all his instruments from the Vibrophone, which is fashioned after the human ear, up to the Disintegrator, in which the neutral centre represents the human heart. With the system which Keely is unfolding to us we may well say, with Buckle, "A vast and splendid career lies before us, which it will take many ages to complete. As we surpass our fathers, so will our children surpass us. Waging against the forces of nature what has too often been a precarious, unsteady, and unskilled warfare, we have never yet put forth the whole of our strength, and have never united all our faculties against our common foe. We have, therefore, been often worsted, and have sustained many and grievous reverses. But, even so, such is the elasticity of the human mind, such is the energy of that immortal and godlike principle which lives within us, that we are baffled without being discouraged, our very defeats quickening our resources, and we may hope that our descendants, benefiting by our failures, will profit by our example, and that for them is reserved that last and decisive stage of the great conflict between man and nature, in which advancing from success to success, fresh trophies will be constantly won; every struggle issuing in a conquest, and every battle ending in a victory." The force discovered by Keely--no, the force revealed to him--will rule the earth with an influence mighty in the interests of humanity. The completion of his system for science and commerce will usher in the dawning of a new era. While our leading men of science are everywhere occupying themselves with the mysteries of electro-magnetic radiation, with the action of the ether, with the structure of the molecule, the instruments with which they are researching are, in comparison with those which Keely has invented, for his researches, like the rudest implements of the savage, compared to those developed by modern civilization. A discussion has recently been carried on in one of our Reviews, as to whether the energy which feeds the magnet comes from the atmosphere, from gravity, from solar rays, or from earth currents. Nothing is more simple than Keely's explanation, as proved by his demonstrations. The energy of the magnet comes from the polar stream; and, though the introductory impulse is so slight that it cannot be weighed any more than can the flow of the mind, yet, if kept up for years, it could not be computed by billions of tons in its effect. The magnet that lifts pounds to-day, if the load of the armature is gradually increased day by day, will lift double the amount in time. Whence comes this energy? Keely teaches that it comes from sympathetic association with one of the triune currents of the polar stream, and that its energy will increase as long as sympathetic flows last, which is through eternity.