Why not admit that certain tenets of science may prove to be nothing more than hypotheses, too hastily adopted as theories, and that Keely has succeeded, as he claims, to have discovered the order of vibration, which by increasing the oscillation of the atom, causes it to rupture itself? This introductory impulse is given at forty-two thousand eight hundred vibrations, instead of one hundred millions; which, having been reached by Professor Hertz, failed to tear apart the atom, and convinced Professor Fitzgerald of the "long way off" that they still are from rupturing it. But even this conclusion was arrived at under an erroneous hypothesis; for the atomic charge does not oscillate across the diameter of the atom, and its possible radiating power was calculated on this hypothesis. Again, as to the canons of science, which are proved by Mr. Keely's researches to be erroneous: take the one which teaches that molecular aggregation is ever attended with dissipation of energy. From whence, then, comes the immense force which is liberated from the constituents of gunpowder by its exciter, fire?--which is a certain order of vibration. Concussion, another order of vibration, releases the hidden energy stored in the molecules of dynamite, which tears the rocks asunder as if they were egg-shells. Still another order of vibration, which Keely has discovered, dissociates the supposed elements of water, releasing from its corpuscular embrace almost immeasurable volumes of force. The discoverer of this law of nature has long been harassed and made to feel like a galley-slave chained to a rock, while with Prometheus aspirations he is seeking to bring down fire and light from heaven for his fellow-men. When Professor Leidy followed his impulse to leap the hedge which divided his special field of research from the domain that Keely was exploring, his was the first effort made by a man of science to save to the world "the hidden knowledge" bestowed upon one who, in my opinion, is alone capable of completing his system in a form to transmit this knowledge to others. I doubt not that this will seem to you as the language of fanaticism; but my convictions do not come from things hoped for. They are the result of the evidence of things seen, year after year, for nearly a decade of years. As a school-girl, fifty years ago, I had the privilege of attending courses of lectures at Yale College, where experiments were given in natural philosophy and in chemistry; which kept up the interest that was awakened in earlier years; when, with my mineral hammer and basket, my father took me in his walks, laying the foundation of that love of true science which has made the discoveries of Keely of such intense interest to me.