Most of the classrooms had two or three persons at the blackboards, and a crowd watching from low perches. It was hard to tell who was the prof and who the student. In some cases, Hrunkner couldn't even guess the field being discussed. They stopped for a moment by one door. A current-generation cobblie was lecturing a bunch of old cobbers. The blackboard scratching looked like a combination of celestial mechanics and electromagnetics. Sherkaner stopped, waved a smile at the people in the room. "You remember the aurora we saw in Dark? I have a fellow here who thinks that maybe it was caused by objects in space, things that are exceptionally dark."
"They weren't dark when we saw them."
"Yes! Maybe they actually have something to do with the start of the New Sun. I have my doubts. Jaybert doesn't know much celestial mechanics yet. Hedoes know E&M. He's working on a wireless device that can radiate at wavelengths of just a few inches."
"Huh? That sounds more like super far-red than radio."
"It's not something we could ever see, but it's going to be neat. He wants to use it as an echo finder for his space rocks."
They walked farther down the hall. He noticed that Underhill was suddenly silent, no doubt to give him time to think on the idea. Hrunkner Unnerby was a very practical fellow; he suspected that was the reason he was essential to some of General Smith's wilder projects. But even he could be brought up short by an idea that was spectacular enough. He had only the vaguest notion how such short wavelengths would behave, though they should be highly directional. The power needed for echo detection would vary as the inverse fourth power of the range—they'd have effective ground uses for it before they ever had enough juice to go looking for rocks in outer space. Hmm. The military angle could be more important than anything this Jaybert was planning...."Has anyonebuilt this high-frequency transmitter?"
His interest must have shown; Underhill was smiling more and more. "Yes, and that's Jaybert's real work of genius, something he calls a cavity oscillator. I've got a little antenna on the roof; it looks more like a telescope mirror than a radio mast. Victory installed a row of relays down the Westermost Range to Lands Command. I can talk to her as reliably as over the telephone cable. I'm using it as a test bed for one class's crypto schemes. We'll end up with the most secure, high-volume wireless you can imagine."
Even if Jaybert's stargazing never works out.Sherkaner Underhill was as crazy as ever, and Unnerby was beginning to see what he was getting at, why he refused to drop everything and work on atomic power. "You really think this school is going to produce the geniuses we need at Lands Command?"
"It's going to find them, anyway—and I think we're bringing out the best in what we find. I've never had more fun in my life. But you have to be flexible, Hrunk. The essence of real creativity is a certain playfulness, a flitting from idea to idea without getting bogged down by fixated demands. Of course, you don't always get what you thought you were asking for. From this era on, I think invention will be the parent of necessity—and not the other way around."
That was easy for Sherkaner Underhill to say. He didn't have to engineer the science into reality.
Underhill had stopped at an empty classroom; he peeked in at the blackboards. More gobbledegook. "You remember the cam-and-gear devices that Lands Command used in the War, to figure ballistic tables? We're making things like that with vacuum tubes and magnet cores. They're a million times faster than the cam gadgets, and we can input the numbers as symbol strings instead of vernier settings. Your physicists will love it." He chuckled. "You'll see, Hrunk. Except for the fact that the inventions are first-patented by our sponsors, you and Victory will have more than enough to keep you happy... ."
They continued up the long spiral stair. It opened finally onto an atrium near the top of the hill. There were higher hills around Princeton, but the view from here was spectacular enough, even in a cool drizzle. Unnerby could see a trimotor coming in at the airport. Tracts of late-phase development on the other side of the valley were the colors of wet granite and just-laid asphalt. Unnerby knew the company on that job. They had faith in the rumors that there would be power available to live long into the next Dark. What would Princeton be like if that were so? A city under the stars and hard vacuum, yet not asleep, and its deepnesses empty. The biggest risks would be late in the Waning Years, when people must decide whether to stock up for a conventional Dark, or gamble on what Hrunkner Unnerby's engineers thought they could do. His nightmares were not of failure, but of partial success.
