"The interplanetary companies have been tinkering with drivers for years and years," said Walt. "They have never detected it?"
"Could be, but there are a couple of facts that I'd like to point out. One is that they're not interested in detection. They only want the best in driver efficiency. Another thing is that the radiation from the drivers is sufficient to ionize atmosphere into a dull red glow that persists for several minutes. Next item is the fact that we on Venus Equilateral should be able to invent a detector; we've been tinkering with detectors long enough. Oh, I'll admit that it is secondary-electronics—"
"Huh? That's a new one on me."
"It isn't electronics," said Channing. "It's subetheric or something like that. We'll call it sub-electronics for lack of anything else. But we should be able to detect it somehow."
"Suppose there is nothing to detect?"
"That smacks of one hundred percent efficiency," laughed Don. "Impossible."
"How about an electric heater?" asked Arden.
"Oh Lord, Arden, an electric heater is the most ineffic—"
"Is it?" interrupted Arden with a smile. "What happens to radiation when intercepted?"
"Turns to heat, of course."