But let Keely answer for himself. Some years since he wrote as follows:--"In analyzing theoretically the mechanical standard necessary for a solution of the philosophy of 'Etheric Vibration,' and the systematic mechanism to produce a rotating circle of etheric force, I must admit that the phenomenon, as presented to myself, by seeming accident, after almost a lifetime of study, still partially holds itself to my understanding as paradoxical. After constructing many mechanical devices in my vain attempts to come more closely to what I term a radiaphonic vibratory position, with microphonic adjustments, I have only been able to reach a few true and standard positions, which I can satisfactorily analyze. There is but one principle underlying all, and this principle is the key to the problem." Keely continues with an explanation of the mechanism of his generator, which he invented and constructed for the multiplication of vibrations, under the disturbance of equilibrium by mediums of different specific gravities--air as one, water as the other. He has since abandoned the generator for a vibratory machine which he calls a "liberator," in which no water is used to develop the force: the disturbance of the equilibrium being effected by a medium thoroughly vibratory in its character. The vapour which Keely produces from this liberator is perfectly free from all humidity, thus giving it a tenuity which he had never been able to reach before, and of a character most desirable for the perfect and high lines of action. In the various improvements which Keely has made in his mechanism, feeling his way in the dark as it were, he sometimes speaks of having "stupidly stumbled over them," of "seeming accident," or "seeming chance," where another would call it "inspiration." "Providence sends chance, and man moulds it to his own design." The improvement upon the generator was conceived by Keely during his desperate struggles to effect a simultaneous action between the molecular and atomic leads--an action that was absolutely essential for the full line of continuation. This shorter and simpler way of reaching his desired end was suggested, in part, to him by a quotation from some one of our scientific writings, made in a letter that he received. I am not sure about this quotation, but I think it was: "Nature works with dual force, but at rest she is a unit." "In the image of God made He man," and in the image of man Keely has constructed his liberator. Not literally, but, as his vibrophone (for collecting the waves of sound and making each wave distinct from the other in tone when the "wave-plate" is struck after the sound has died away) is constructed after the human ear, so his liberator corresponds in its parts to the human head.