In November 1884, Mr. Keely obtained a standard for progressive research in the success of an experiment, which he had tried many times before, without arriving at the result that his theories had led him to expect. One of those present, at the time that this test was made, afterwards wrote to Mr. Keely, to obtain an explanation of the dynamic force which had been witnessed, causing a small globe to rotate when two persons had taken hold of the rod together, with a firm grasp; one of whom was standing on a circular sheet of metal, from which piano wires stretched toward the globe, near enough to touch one of the plates of glass which insulated the ball. Mr. Keely replied, "I cannot describe it other than the receptive concussion of the two forces, positive and negative, coming together, seeking their coincidents and thus producing rotation by harmonious waves, not streams. You ask if sound waves had anything to do with the motion of the globe? Nothing; the introductory settings are entirely different. The ball ceased to rotate when I took your left hand in my right hand, while with our other hands holding the iron rod resting on the metal plate, because the receptive flows became independent of the circular chord of resonation as set up mechanically. The power of rotation comes on the positive; and the power of negation breaks it up."... Encouraged by this confirmation of his theories, Keely pursued his researches with renewed vigour. At this time he wrote, "I am straining every nerve to accomplish certain matters in a given time, working from twelve to fourteen hours daily. Although in my illness I have had some peaceful hours in thinking over the fascinating points associated with the researches to which I am devoting my life, I have also had some very stormy ones in reviewing the many unjust insinuations and denouncements that have been heaped upon me by the ignorant and the base-hearted. My one desire has been the acquisition of knowledge; and, no matter how great the impediment thrown in my path, I will work without ceasing to attain my end. After struggling for over seventeen years, allowing scientists to examine my machinery in the most thorough manner, and to make the most sensitive tests, denunciations have multiplied against me. One charge is that I use sodium in my mercury, in the vacuum test. I have thought that I would never again make any effort to prove that I am honest; but I am working in a new lead, and for the satisfaction of the few friends that I have I propose to show my introductory evolutions, in proof of the negatization of an etheric substance to produce vacuum. The mercury may be delivered to me by an expert: I will operate from an open mercury bath: using the most perfect mercury gauge obtainable, attached to the same sphere that the column is operated from. Professor Rogers, the highest authority we have, saw the operation of inducing these etheric vacuums and pronounced the result wonderful. He said that