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 As the screw was moved outward, and the pressure diminished, the force decreased, and when the screw was withdrawn to its fullest extent, the action of negative gravity entirely ceased.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.
When this little apparatus worked to my satisfaction I called my wife into my laboratory and explained to her my invention and its value. She had known that I had been at work with an important object, but I had never told her what it was. I had said that if I succeeded I would tell her all, but if I failed she need not be troubled with the matter at all. Being a very sensible woman, this satisfied her perfectly. Now I explained everything to her—the construction of the machine, and the wonderful uses to which this invention could be applied. I told her that it could diminish, or entirely dissipate, the weight of objects of any kind. A heavily loaded wagon, with two of these instruments fastened to its sides, and each screwed to a proper force, would be so lifted and supported that it would press upon the ground as lightly as an empty cart, and a small horse could draw it with ease. A bale of cotton, with one of these machines attached, could be handled and carried by a boy. A car, with a number of these machines, could be made to rise in the air like a balloon. Everything, in fact, that was heavy could be made light; and as a great part of labor, all over the world, is caused by the attraction of gravitation, so this repellent force, wherever applied, would make weight less and work easier. I told her of many, many ways in which the invention might be used, and would have told her of many more if she had not suddenly burst into tears.
“The world has gained something wonderful,” she exclaimed, between her sobs, “but I have lost a husband!”
“What do you mean by that?” I asked, in surprise.
“I haven’t minded it so far,” she said, “because it gave you something to do, and it pleased you, and it never interfered with our home pleasures and our home life. But now that is all over. You will never be your own master again. It will succeed, I am sure, and you may make a great deal of money, but we don’t need money. What we need is the happiness which we have always had until now. Now there will be companies, and patents, and lawsuits, and experiments, and people calling you a humbug, and other people saying they discovered it long ago, and all sorts of persons coming to see you, and you’ll be obliged to go to all sorts of places, and you will be an altered man, and we shall never be happy again. Millions of money will not repay us for the happiness we have lost.”
These words of my wife struck me with much force. Before I had called her my mind had begun to be filled and perplexed with ideas of what I ought to do now that the great invention was perfected. Until now the matter had not troubled me at all. Sometimes I had gone backward and sometimes forward, but, on the whole, I had always felt encouraged. I had taken great pleasure in the work, but I had never allowed myself to be too much absorbed by it. But now everything was different. I began to feel that it was due to myself and to my fellow-beings that I should properly put this invention before the world. And how should I set about it? What steps should I take? I must make no mistakes. When the matter should become known hundreds of scientific people might set themselves to work; how could I tell but that they might discover other methods of producing the same effect? I must guard myself against a great many things. I must get patents in all parts of the world. Already, as I have said, my mind began to be troubled and perplexed with these things. A turmoil of this sort did not suit my age or disposition. I could not but agree with my wife that the joys of a quiet and contented life were now about to be broken into.
“My dear,” said I, “I believe, with you, that the thing will do us more harm than good. If it were not for depriving the world of the invention I would throw the whole thing to the winds. And yet,” I added, regretfully, “I had expected a great deal of personal gratification from the use of this invention.”
“Now listen,” said my wife, eagerly; “don’t you think it would be best to do this: use the thing as much as you please for your own amusement and satisfaction, but let the world wait? It has waited a long time, and let it wait a little longer. When we are dead let Herbert have the invention. He will then be old enough to judge for himself whether it will be better to take advantage of it for his own profit, or simply to give it to the public for nothing. It would be cheating him if we were to do the latter, but it would also be doing him a great wrong if we were, at his age, to load him with such a heavy responsibility. Besides, if he took it up, you could not help going into it, too.”
I took my wife’s advice. I wrote a careful and complete account of the invention, and, sealing it up, I gave it to my lawyers to be handed to my son after my death. If he died first, I would make other arrangements. Then I determined to get all the good and fun out of the thing that was possible without telling any one anything about it. Even Herbert, who was away from home, was not to be told of the invention.
The first thing I did was to buy a strong leathern knapsack, and inside of this I fastened my little machine, with a screw so arranged that it could be worked from the outside. Strapping this firmly to my shoulders, my wife gently turned the screw at the back until the upward tendency of the knapsack began to lift and sustain me. When I felt myself so gently supported and upheld that I seemed to weigh about thirty or forty pounds, I would set out for a walk. The knapsack did not raise me from the ground, but it gave me a very buoyant step. It was no labor at all to walk; it was a delight, an ecstasy. With the strength of a man and the weight of a child, I gayly strode along. The first day I walked half a dozen miles at a very brisk pace, and came back without feeling in the least degree tired. These walks now became one of the greatest joys of my life. When nobody was looking, I would bound over a fence, sometimes just touching it with one hand, and sometimes not touching it at all. I delighted in rough places. I sprang over streams. I jumped and I ran. I felt like Mercury himself.
I now set about making another machine, so that my wife could accompany me in my walks; but when it was finished she positively refused to use it. “I can’t wear a knapsack,” she said, “and there is no other good way of fastening it to me. Besides, everybody about here knows I am no walker, and it would only set them talking.”
I occasionally made use of this second machine, but I will give only one instance of its application. Some repairs were needed to the foundation-walls of my barn, and a two-horse wagon, loaded with building-stone, had been brought into my yard and left there. In the evening, when the men had gone away, I took my two machines and fastened them, with strong chains, one on each side of the loaded wagon. Then, gradually turning the screws, the wagon was so lifted that its weight became very greatly diminished. We had an old donkey which used to belong to Herbert, and which was now occasionally used with a small cart to bring packages from the station. I went into the barn and put the harness on the little fellow, and, bringing him out to the wagon, I attached him to it. In this position he looked very funny with a long pole sticking out in front of him and the great wagon behind him. When all was ready I touched him up; and, to my great delight, he moved off with the two-horse load of stone as easily as if he were drawing his own cart. I led him out into the public road, along which he proceeded without difficulty. He was an opinionated little beast, and sometimes stopped, not liking the peculiar manner in which he was harnessed; but a touch of the switch made him move on, and I soon turned him and brought the wagon back into the yard. This determined the success of my invention in one of its most important uses, and with a satisfied heart I put the donkey into the stable and went into the house.
Our trip to Europe was made a few months after this, and was mainly on our son Herbert’s account. He, poor fellow, was in great trouble, and so, therefore, were we. He had become engaged, with our full consent, to a young lady in our town, the daughter of a gentleman whom we esteemed very highly. Herbert was young to be engaged to be married, but as we felt that he would never find a girl to make him so good a wife, we were entirely satisfied, especially as it was agreed on all hands that the marriage was not to take place for some time. It seemed to us that, in marrying Janet Gilbert, Herbert would secure for himself, in the very beginning of his career, the most important element of a happy life. But suddenly, without any reason that seemed to us justifiable, Mr. Gilbert, the only surviving parent of