I had been a professional man, but some years before had retired upon a very comfortable income. I had always been very fond of scientific pursuits, and now made these the occupation and pleasure of much of my leisure time. Our home was in a small town; and in a corner of my grounds I built a laboratory, where I carried on my work and my experiments. I had long been anxious to discover the means not only of producing, but of retaining and controlling, a natural force, really the same as centrifugal force, but which I called negative gravity. This name I adopted because it indicated better than any other the action of the force in question, as I produced it. Positive gravity attracts everything toward the centre of the earth. Negative gravity, therefore, would be that power which repels everything from the centre of the earth, just as the negative pole of a magnet repels the needle, while the positive pole attracts it. My object was, in fact, to store centrifugal force and to render it constant, controllable, and available for use. The advantages of such a discovery could scarcely be described. In a word, it would lighten the burdens of the world. I will not touch upon the labors and disappointments of several years. It is enough to say that at last I discovered a method of producing, storing, and controlling negative gravity. The mechanism of my invention was rather complicated, but the method of operating it was very simple. A strong metallic case, about eight inches long, and half as wide, contained the machinery for producing the force; and this was put into action by means of the pressure of a screw worked from the outside. As soon as this pressure was produced, negative gravity began to be evolved and stored, and the greater the pressure the greater the force. As the screw was moved outward, and the pressure diminished, the force decreased, and when the screw was withdrawn to its fullest extent, the action of negative gravity entirely ceased. Thus this force could be produced or dissipated at will to such degrees as might be desired, and its action, so long as the requisite pressure was maintained, was constant.