The voice from the observatory wailed:
"It's crazy! It can't be going like that!"
They waited. Fifteen seconds more. Sixteen. Eighteen. Twenty. The beep sounded. The spurt of sound had dropped a full octave. The signal-rocket, traveling normally, might have attained a maximum velocity of some two thousand feet per second. It was now moving at a speed which was an appreciably large fraction of the speed of light. Which was starkly impossible. It simply happened to be true.
They heard the signal once more. The observatory's multiple-receptor receiver had been stepped up to maximum amplification. The signal was distinct, but very faint indeed. And the rocket was then traveling—so it was later computed—at seven-eighths of the speed of light. Between the flat cone on the front of the distress-torpedo, and the flat cone on the ground, a field of force existed. The field was not on the back surface of the torpedo's cone, but before the front surface. It went back to the moon from there, so all the torpedo and its batteries were in the columnar stressed space. And an amount of rocket-push that should have sent the four-foot torpedo maybe twenty miles during its period of burning, had actually extended its flight to more than thirty-seven hundred miles before the red sparks were too far separated to be traced any farther, and by then had kicked the torpedo up impossibly close to light-speed.
In a sense, the Dabney field had an effect similar to the invention of railways. The same horsepower moved vastly more weight faster, over steel rails, than it could haul over a rutted dirt road. The same rocket-thrust moved more weight faster in the Dabney field than in normal space. There would be a practical limit to the speed at which a wagon could be drawn over a rough road. The speed of light was a limit to the speed of matter in normal space. But on a railway the practical speed at which a vehicle could travel went up from three miles an hour to a hundred and twenty. In the Dabney field it was yet to be discovered what the limiting velocity might be. But old formulas for acceleration and increase-of-mass-with-velocity simply did not apply in a Dabney field.
Jones rode back to Lunar City with Cochrane and Holden and Babs. His face was dead-pan.
Babs tried to recover the mien and manner of the perfect secretary.
"Mr. Cochrane," she said professionally, "will you want to read the publicity releases Mr. Bell turns out from what Mr. West and Mr. Jamison tell him?"
"I don't think it matters," said Cochrane. "The newsmen will pump West and Jamison empty, anyhow. It's all right. In fact, it's better than our own releases would be. They'll contradict each other. It'll sound more authentic that way. We're building up a customer-demand for information."
The small moon-jeep rolled and bumped gently down the long, improbable highway back to Lunar City. Its engine ran smoothly, as steam-engines always do. It ran on seventy per cent hydrogen peroxide, first developed as a fuel back in the 1940s for the pumps of the V2 rockets that tried to win the Second World War for Germany. When hydrogen peroxide comes in contact with a catalyst, such as permanganate of potash, it breaks down into oxygen and water. But the water is in the form of high-pressure steam, which is used in engines. The jeep's fuel supplied steam for power and its ashes were water to drink and oxygen to breathe. Steam ran all motorized vehicles on Luna.