LITMIR.BIZ

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      She had to wait some time for an answer to her call, but finally she got Creighton on the wire.

      "He had just come in," she said, hanging up the receiver. "He'll be there if we come down right away."

      Adele Laidlaw drove us downtown in her own high-powered car, which, true to her mechanical instincts, she handled herself. She drove it very well, too. In fact, I felt safer than with Kennedy, who, like many drivers, was inclined to take chances when he was at the wheel himself and could see what he was up against, though he balked severely when anyone else did it.

      "How did you become interested in this perpetual motion machine, Miss Laidlaw?" he asked as we threaded our way through the dense traffic.

      "Well, I suppose everyone knows that I'm interested in engines," she replied, as we waited for the signal from a policeman at a cross-street. "I've spent a good deal on them in speed-boats and in racing cars, too. An acquaintance, a friend of Mr. Creighton's, a Mrs. Barry,—Mr. Tresham knows her,—thought perhaps I might use the motor somehow and told me of it. I went down to see it and—I must confess that it fascinated me."

      I had not yet quite got myself accustomed to a girl who was interested in such things, though, in these days, I must confess, saw no reason why she should not be. Kennedy was dividing his attention between the admirable manner in which she handled the car and her very expressive face. Was it really, I wondered, that Creighton, more than his motor, has fascinated her?

      She drew up before the Consolidated Bank Building, a modern steel and concrete structure in the uptown business section.

      "The laboratory is next door," she said, as she let the car slide ahead a few feet more. "Mr. Tresham's office is in the Bank Building. I've had to go there so often since father died that I stopped through force of habit, I suppose."

      Mindful of Kennedy's admiration for Freud, his theory of forgetting occurred to me. Was there any significance in the mistake? Had the unconscious blunder betrayed something which perhaps she herself consciously did not realize? Was it Tresham, after all, whom she really admired and wanted to see?

      Creighton's workshop was in an old two-story brick building, evidently awaiting only the development of the neighborhood before it was torn down. Meanwhile the two buildings were in marked contrast. Which of them typified Creighton? Was he hopelessly out of date, or really ahead of his time? I must confess to having had a lively curiosity to meet the inventor.

      The entrance to the laboratory from the street was through a large door into a room in which was a carpenter's bench. On one side were some powerful winches and a large assortment of tools. In the back of the room a big door led to another room on the ground floor to the rear.

      "Mr. Creighton's is upstairs," remarked Miss Laidlaw, turning past the locked door and going up a worn flight of steps.

      "Whose shop is that?" asked Kennedy, indicating the door.

      "I don't know who rents these rooms down here," she replied.

      Up the stairway we went to the second floor. On the top landing stood some old machinery. In a little room on one side was a big desk, as well as books, instruments, and drawings of all sorts. Opposite this room was another little room, with many bits of expensive machinery on shelves and tables. Back of these two, and up a step, was a large room, the full width of the building, the workshop of the inventor, into which she led us.

      "I've brought a couple of friends of mine who may be interested in the vibrodyne motor," Miss Laidlaw introduced us.

      "Very pleased to meet you, gentlemen," Creighton returned. "Before we get through, I think you'll agree with me that you never dreamed of anything more wonderful than this motor of mine."

      He was a large, powerfully built man, with a huge head, square jaw with heavy side whiskers, and eyes that moved restlessly under a shock of iron-gray hair. Whether it was the actual size of his head or his bushy hair, one got the impression that his cranium housed a superabundant supply of brains.

      Every action was nervous and quick. Even his speech was rapid, as though his ideas outstripped his tongue. He impressed one as absorbed in this thing which he said frankly had been his life study, every nerve strained to make it succeed and convince people.

      "Just what is this force you call vibrodyne?" asked Craig, gazing about at the curious litter of paraphernalia in the shop.

      "Of course, I'm willing to admit," began Creighton quickly, in the tone of a man who was used to showing his machine to skeptical strangers but must be allowed to explain it in his own way, "that never before by any mechanical, electrical, thermal, or other means has a self-moving motor been made."

      He paused apparently to let us grasp the significance of what he was about to say. "But, is it impossible, as some of the old scientists have proved to their own satisfaction it must be?" he went on, warming up to his subject. "May there not be molecular, atomic, even ionic forces of which we have not dreamed? You have only to go back a few years and study radioactivity, for instance, to see how ideas may change.

      "Today," he added emphatically, "the conservation of energy, in the old sense at least, has been overthrown. Gentlemen, all the old laws must be modified by my discovery of vibrodyne. I loose new new forces—I create energy!"

      I watched him narrowly as he proposed and rapidly answered his own questions. He was talking quite as much for Miss Laidlaw's benefit, I thought, as ours. In fact, it was evident that her interest in the machine and in himself pleased him greatly.

      I knew already that though the search after perpetual motion through centuries had brought failure, still it captivated a certain type of inventive mind. I knew also that, just as the exact squaring of the circle and the transmutation of metals brought out some great mathematical discoveries and much of modern chemistry, so perpetual motion had brought out the greatest of all generalizations of physics—the conservation of energy.

      Yet here was a man who questioned the infallibility of that generalization. Actually taking the ultra-modern view that matter is a form of energy, he was asserting that energy in some way might be created or destroyed, at least transformed in a manner that no one had ever understood before. To him, radioactivity which had overthrown or amplified many of the old ideas was only a beginning.

      "Here is the machine," he pointed out at last, still talking, leading us proudly across the littered floor of his laboratory.

      It seemed, at first glance, to consist of a circular iron frame, about a foot and a half in diameter, firmly bolted to the floor.

      "I have it fastened down because, as you will see, it develops such a tremendous power," explained the inventor, adding, as he pointed above it, "That is all the power is developed from, too."

      On a shelf was a Daniell battery of four cells. In the porous cup was bichromate of potash and in the outer vessel dilute sulphuric acid.

      "Let me show you how I get two and a half horsepower out of three ounces of zinc for nine hours," went on Creighton proudly. "As you doubtless know, the usual thing is one horsepower per pound of zinc per hour. Ultimately, I expect to perfect the process until I get a thousand horsepower from an ounce in this vibrodyne motor."

      He started the engine by attaching the wires from the comparatively weak Daniell cells. Slowly it began to move, gaining speed, until finally the very floor shook from the great power and the rapidity of the motion.

      It seemed incredible that the small current from the battery should develop such apparent power and I looked at Kennedy in amazement.

      "There's a carelessly—or purposely—ill-balanced flywheel, I suspect," whispered Craig to me surreptitiously.

      "Yes, but the power," I persisted.

      He shook his head. Evidently he was not convinced, but had no theory, yet.

      Adele Laidlaw looked at Craig questioningly, as though to read what he thought of it. Before her he betrayed nothing. Now and then she would look earnestly at Creighton. It was evident that she admired him very much, yet there seemed to be something about him that she did

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