The question naturally arises, "Are not the forces with which Keely is dealing of too subtle a nature to be harnessed to do the daily work of the world?" Even were it so, the fascination attendant upon his researches would prevent him from abandoning them; but his faith in his ability to accomplish all that he has undertaken to do for the Keely Motor Company and for others is equalled only by the persistent energy which, in the face of gigantic obstacles, of cruel obloquy, of baffled endeavours, leads him to persevere to the end. He believes that the successful result is as positive as are the continued revolutions of our globe, under the great law which governs all Nature's highest, grandest, and most sensitive operations. And when has Nature ever revealed a force save to permit man to subjugate it for the progress of our race? Another question often heard is, "Why does not Keely make known his discoveries?" 10th. He has written three treatises to explain his system, the titles of which are as follows:-- I. Theoretical Exposé or Philosophical Analysis of Vibro-Molecular, Vibro-Atomic, and Sympathetic Vibro-Etheric Forces, as applied to induce Mechanical Rotation by Negative Sympathetic Attraction. II. Explanatory Analysis of Vibro-Acoustic Mechanism in all its Different Groupings or Combinations to induce Propulsion and Attraction (sympathetically) by the Power of Sound-Force; as also the Different Conditions of Intensity, both Positive and Negative, on the Progressive Octaves to Ozonic Liberation and Luminosity. III. The Determining Principle of Matter, or the Connective Link between the Finite and the Infinite, progressively considered from the Crude Molecular to the Compound Inter-Etheric; showing the Control of Spirit over Matter in all the Variations of Mass-Chords and Molecular Groupings, both Physical and Mechanical. If these treatises were read from the first page to the last, by men of science, they would not at present be any better understood than were Gilbert's writings in his age, author of "De Magnete."