Rhoda screamed. It was a familiar sound to Karl. He noted with satisfaction that Leon could hardly stand on his feet and that his face was covered with plasters. Then, startled, he saw that Leon was shivering as with the ague. His outline on the screen grew dim and indistinct as the rate of vibration increased. Then the body bloated and became misty. He could see through it. The vibrating death! His father had gone the same way!
Karl groaned at the thought. The whine of the distant machine rose in pitch until it passed the limit of audibility. Tiny pin-points of incandescence glowed here and there from the Zar’s victims as periods of vibration were reached that coincided with the natural periods of certain of the molecules of their structure. They were no longer recognizable as human beings. Shimmering auras surrounded them. Suddenly they were torches of cold fire, weaving, oscillating with inconceivable rapidity. Then they were gone; vanished utterly.
The Zar laughed—that horrible cackle again.
“Great God!” exclaimed Karl, “let’s go! The fiend must not live a moment longer than necessary. Are you ready?”
Rudolph’s brother smiled. “We’re ready Karl,” he said.
The great vessel hummed with activity. The five torpedo-shaped aeros of the battle fleet were ready to take off from the cavities in the hull. In the flagship Karl was stationed at the control of the heat-ray. His instructions in its operation had been simple. A telescopic sight with crosshairs for the centering of the object to be attacked; a small lever. That was all. He burned with impatience.
Then they were dropping; falling clear of the mother ship. The pilot pressed a button and the electronic motors started. A burst of roaring energy streamed from the tapered stern of their vessel and the earth lurched violently to meet them. Down, down they dived until the rocking surface of Dorn was just beneath them. Then they flattened out and circled the vast upper surface. From the corner of his eye Karl saw that the other four vessels of his fleet were just behind. There was a flurry among the wasplike clouds of pleasure craft over the city. They scurried for cover. Something was amiss!
“Hurry!” shouted Karl. “The warning is out! There is no time to lose!”