"You're right," Craven conceded, "but we'll be able to get more. We'll build up what speed we can and then we'll shut off the drive and let momentum carry us along. In the meantime our collector will gather power for us. We're advancing toward the source of radiation now, instead of away from it. Out here, where there's little gravity stress, fewer conflicting lines of gravitation, we'll be able to spread out the field, widen it, make it thousands of miles across. And the new photo-cells will be a help as well."
"How are the photo-cells coming?" asked Chambers.
Craven grinned. "We'll have a bank of them in within a few hours, and replace the others as fast as we can. I have practically the whole crew at work on them. Manning doesn't know it, but he found the limit of those photo-cells wh
