"It would operate beyond the planets," said Greg. "It would operate equally well anywhere in space, for all of space is filled with gravitational stress. We could use gravitational bodies many light years away as the driver of our ships."
A half-wild light glowed momentarily in his eyes.
"Russ," he said, "we're going to put space fields to work at last."
He walked to the chair, picked it up and sat down in it.
"We'll start building a ship," he stated, "just as soon as we know the mechanics of this gravity concentration and control. Russ, we'll build the greatest ship, the fastest ship, the most powerful ship the Solar System has ever known!"
"Damn," said Russ, "that thing's slipped again."
He glared at the offending nut. "I'll put a lock washer on it this time."
Wilson stepped towar
