Коллектив авторов - Grantville Gazette 37

"And rubies are just aluminum oxide, after all. Spinels and tourmaline are out, too. But what about a carbuncle?"

"No. All red garnets have aluminum in the B location, all the ones with something else are green or black."

"Then I guess you need see if Roth's can suggest anything," Johann said.

HDG Laboratories, Jena

Lips helped his brother-in-law set up his latest creation-a three-color camera-obscura. Not that Phillip was laying claim to the idea for the machine. That had been someone at Schmucker and Schwentzel, in Rudolstadt. After seeing the poster for Paxton's Revitalizing Cream, Phillip had been as interested as Lips in learning how it was done. And Lips had learned just how powerful his brother-in-law was, although to be fair, Phillip didn't seem to be aware of his power.

No sooner had Phillip asked Paxton's how the poster had been produced, than he'd been directed to Schmucker and Schwentzel. The fact that Paxton's Revitalizing Cream was riding on the coattails of Phillip's revitalizing fluid probably had something to do with the friendly response to his inquiries.

The printers hadn't been as obeisant when Phillip and Lips turned up to ask questions, but they'd been more than willing to describe their technique-maybe the fact the film and photographic chemicals they were using all came from one of the HDG facilities had something to do with it. Not that Lips was feeling cynical.

The visit had seen the commissioning of a smaller version of Schmucker and Schwentzel's camera. The camera for Phillip had been treated as a rush job, and been delivered just yesterday. Lips, again not feeling particularly cynical, wondered how much Phillip was going to be charged, because none of the people they dealt with that day had mentioned anything as common as price. He made a mental note to ask Frau Mittelhausen how much everything had cost.

"It would be so much easier if we had color film," Lips said. Certainly Phillip's black and white camera was nowhere near as finicky to set up.

"It would, but there have been difficulties replicating the Autochrome process."

The Autochrome process used starch grains dyed in red, green and blue, randomly distributed over a photosensitive emulsion. Or at least that's what the instructions in the eleventh edition of the Encyclopedia Britannica said. "Do you know what is wrong?"

"It is obvious that there is some step, some additional chemical or process missing from the published directions, so we will do what we always do."

"And that is?" Lips asked.

"Revert to basic principles. Take what we know, and try adding things to the known until we discover the unknown."

That didn't fit with the basic principles of chemistry he'd picked up in the few up-time science classes he'd managed to sneak into back in Grantville. Those had suggested a much more theoretical approach. "Does that work?"

"It is how I discovered how to make the Amazing Essence of Fire Tablets the up-time chemists claimed couldn't be made." Phillip pulled the camera's blackout cloth over his head.

Yes, well, Lips knew all about those fire tablets. If you knew what you were doing, and Hans Saltzman, Phillip's trusted personal laborant of nearly five years, certainly did know, you could turn those fire tablets into high explosive. It had been interesting watching Hans make up some of the explosive and then detonate it on a farm outside Jena's walls. For such a small amount of explosive, it had made a very big hole. But it was the first time he'd heard that the up-timers hadn't believed it was possible to make the precursor. Maybe there was something to Phillip's approach to research that was better than the up-timer science.

Phillip reappeared from under the blackout cloth and closed the shutter before opening the slides on the film cassettes. "Everything is ready. If you would like to set the experiment in motion."

Lips took the hint and turned off the lights before initiating the flame test. Moments later the spectral lines were visible on the detector. Phillip opened the shutter, and Lips ensured the flame had a steady supply of prepared loops for the twenty-second exposure.

****

Lips sat beside Phillip as he studied the color image projected onto the screen. The use of colored filters meant that the sets of black and white photographs taken by the three-color camera could be projected onto a screen to form a single color image. On the screen in front of him was a nearly perfect record of the spectral lines produced in the flame test.

"Well, that seems to have worked," Phillip said.

"You sound surprised?"

"Of course I'm surprised. Nothing ever works the first time."

"But Schmucker and Schwentzel's camera worked, so why shouldn't yours?"

Phillip looked up and shook his head. "The voice of someone who has not yet run into the great Murphy." He looked Lips directly in the eyes. "If anything can go wrong, it will. Remember that, Lips. Remember that."

January 1636, Prague

There was a hubbub of conversation in the meeting room of the Prague chapter of the Society of Aural Investigators, the professional body responsible for maintaining the standards of the profession. Zacharias carried his steaming mug of Tincture of Cacao-the beverage the society had virtually made its own-to the table where Johann was sitting. "Sorry I'm late, but some fool forgot to refill the Wetmore's reservoir, and it ran out of water in the middle of a calculation. I had to refill the reservoir and bleed the whole thing before I could do anything."

"Another reading for the king?" Johann asked.

"Yes." Zacharias was proud of himself. He hadn't come across as overly smug. As Aural Investigator to the king, he was someone -and the increase in business from people who wanted the king's aural investigator to read their aura didn't hurt.

"Did you manage to find yourself a red gemstone for the bracelet?"

"Yes, Roth's had the perfect red gemstone-a Mexican opal. I had them cut and set it in the bracelet."

"Did it work?"

"It was the calculations based on the bracelet that kept me so long." He took out a notebook, opened it to the right page, and passed it to Johann. "Have a look. The king should be highly impressed when I tell him how much closer to the ideal state his aura is."

Johann skimmed over the numbers before handing the notebook back. "Of course, it would be a lot better if you could record the aura in color."

"Of course it would be easier, but nobody is doing color . . ." Zacharias stopped because Johann was shaking his head. "Someone is?"

"If you'd been here earlier you would have heard Zankel reading from the latest issue of the Proceedings of the HDG Laboratories . It has a centerfold of color photographs from one of the doctor's experiments."

"What?" Zacharias was horrified that he'd missed such news. He stood and searched the tables for a copy of the Proceedings . Sighting one, he hastened over and secured a copy. He knew he had the right issue as soon as he opened it. There was a centerfold in high-quality white paper with color images of spectral lines from flame tests. He hastened back to Johann and sat down. "Does he say how he does it?"

"Would you?" Johann asked.

"No." Of course he wouldn't give away information like that. It'd be worth a fortune. He hastily skimmed through the articles in the journal, looking for anything that might cast light on the question of how it was done, and more importantly, how long it would be before the technique was available for everyday use.

"You can stop hunting. Everyone has already looked, and there is nothing about the method in that issue."

Zacharias quickly checked the publication date-January, 1636. The Proceedings were published three times a year, so that meant the next issue wouldn't be out until May. "A letter to the doctor asking about the technique's application to Kirlian imaging is definitely indicated."