"Put it in the rear of the ship," Wade suggested. "We'll mount one of the Nigran telectroscopes." "Control room in the bow, of course," Morey chipped in. "I've got you," Fuller said. "I'll work the thing out and give you a cost estimate and drawings." "Fine," said Arcot, standing up. "Meanwhile, the rest of us will work out our little exhibition to impress Mr. Morey and Dad. Come on, lads, let's get back to the lab." III It was two weeks before Dr. Robert Arcot and his old friend Arthur Morey, president of Transcontinental Airways, were invited to see what their sons had been working on. The demonstration was to take place in the radiation labs in the basements of the Transcontinental building. Arcot, Wade, Morey, and Fuller had brought the equipment in from the country place in Vermont and set it up in one of the heavily-lined, vault-like chambers that were used for radiation experiments. The two older men were seated before a huge eighty-inch three-dimensional television screen several floors above the level where the actual demonstration was going on. "There can't be anyone in the room, because of radiation burns," explained Arcot, junior. "We could have surrounded the thing with relux, but then you couldn't have seen what's going on. "I'm not going to explain anything beforehand; like magic, they'll be more astounding before the explanation is given." He touched a switch. The cameras began to operate, and the screen sprang into life. The screen showed a heavy table on which was mounted a small projector that looked something like a searchlight with several heavy cables running into it. In the path of the projector was a large lux metal crucible surrounded by a ring of relux, and a series of points of relux aimed into the crucible. These points and the ring were grounded. Inside the crucible was a small ingot of coronium, the strong, hard, Venerian metal which melted at twenty-five hundred degrees centigrade and boiled at better than four thousand. The crucible was entirely enclosed in a large lux metal case which was lined, on the side away from the projector, with roughened relux. Arcot moved a switch on the control panel. Far below them, a heavy relay slammed home, and suddenly a solid beam of brilliant bluish light shot out from the projector, a beam so brilliant that the entire screen was lit by the intense glow, and the spectators thought that they could almost feel the heat. It passed through the lux metal case and through the coronium bar, only to be cut off by the relux liner, which, since it was rough, absorbed over ninety-nine percent of the rays that struck it. The coronium bar glowed red, orange, yellow, and white in quick succession, then suddenly slumped into a molten mass in the bottom of the crucible.