There were four dials, and three huge switches. Arcot set all four dials, and threw one of the switches. Then he started slowly turning the fourth dial. In the center of the room a dim, shining mist a foot in diameter began to appear. It condensed, solidified without shrinking, a solid ball of matter a foot in diameter. It seemed black, but was a perfectly reflective surface--and luminous! "Then--then you had already known of this thing? Then why did you not tell me when I tried to show it?" demanded the Talsonian. Arcot was sending the globe, now perfectly non-luminous, about the room. It flattened out suddenly, and was a disc. He tossed a small weight on it, and it remained fixed, but began to radiate slightly. Arcot readjusted his dials, and it ceased radiating, held perfectly motionless. The sphere returned, and the weight dropped to the floor. Arcot maneuvered it about for a moment more. Then he placed his friends behind a screen of relux, and increased the radiation of the globe tremendously. The heat became intense, and he stopped the radiation. "No, Stel Felso Theu, we do not have this on our world," Arcot said. "You do not have it! You look at my apparatus fifteen minutes, and then work for an hour--and you have apparatus far more effective than ours, which required years of development!" exclaimed the Talsonian. "Ah, but it was not wholly new to me. This ship is driven by curving space into peculiar coordinates. Even so, we didn't do such a hot job, did we, Morey?" "No, we should have--" "What--it was not a good job?" interrupted the Talsonian. "You succeeded in creating it in air--in making it stop radiating, in making a ball a foot in diameter, made it change to a disc, made it carry a load--what do you want?" "We want the full possibilities, the only thing that can save us in this war," Morey said. "What you learned how to do was the reverse of the process we learned. How you did it is a wonder--but you did. Very well--matter is energy--does your physics know that?" asked Arcot. "It does; matter contains vast energy," replied the Talsonian. "Matter has mass, and energy because of that! Mass _is_ energy. Energy in any known form is a field of force in space. So matter is ordinarily a combination of magnetic, electrostatic and gravitational fields. Your apparatus combined the three, and put them together. The result was--matter! "You created matter. We can destroy it but we cannot create it. "What we ordinarily call matter is just a marker, a sign that there are those energy-fields. Each bit is surrounded by a gravitational field. The bit is just the marker of that gravitational field.