CHAPTER IV

Project X

"Heavy water!" Hartson Brant exclaimed softly.

Rick and Scotty looked at each other blankly.

And at that moment, Barby completed the connection and called to Steve.

He strode to the phone and picked it up. "Who's this? All right. Steve Ames here. Take down these names. Hobart Zircon. Richard Brant. Donald Scott. You'll find full data on them in the files. Prepare travel orders and get tickets for all three to Hong Kong via the first plane leaving New York after 7:00 p.m. tomorrow night. Arrange for a letter of credit in the usual amount on the National City Bank of Washington, and have the bank make arrangements with all their Far East branches. Put all three on the pay roll at the same grades they held before. Get pa.s.sports for them with visitor's visas for the Philippines, Hong Kong, Indo-China, Indonesia, Siam, and China. We don't know where they'll end up. Then put all that stuff in an envelope and get it to me here at Spindrift by special messenger ... wait, never mind that. I'll send Mike back right away, and he can bring it to me. Now read those instructions back."

Steve listened for a moment. "Right. Get going. What? Oh, charge the whole thing to a new case file. Mark it Project X."

He disconnected and turned to the group. "Now," he said grimly, "let's talk turkey."

He nodded at Rick and Scotty. "Zircon said he could leave in the morning, if necessary. That's rushing you a little too much. So I've given you until tomorrow night."

Rick grinned. Once things started to move with Steve Ames, they moved strictly jet-propelled.

"What are we supposed to do?" Scotty asked.

"Find Bradley. If you can. But don't spend too much time searching.

Getting all the dope--and I mean _all_--on that heavy water is the reason for your going out there. If you find Bradley, he can help. Maybe Chahda can help, too. But never forget for a minute that tracking down that heavy water is your mission."

"If we don't find Bradley, we won't know how to get started," Rick pointed out.

Steve grunted. "No? If I believed that, I'd have gone somewhere else for help. I came here because I knew Spindrift could give me ingenuity as well as scientific knowledge. And you hadn't better let me down!"

"We won't let you down," Scotty a.s.sured him.

Barby chimed in indignantly, "Of course they won't."

Steve smiled. "Don't worry. I'm not afraid of their falling down on the job. But it's a big one. I'll tell Zircon this when he comes, but you can be thinking it over in the meantime. You're to find out who is bringing heavy water to the Asia coast and what they're doing with it.

You're to find out where it comes from, and why it is being made. You're to get samples and send them back here. And most important of all, you're to locate and pinpoint for us any industrial plants you find."

Scotty scratched his head. "Fine. Only let's get back to the beginning.

What is heavy water? And why are you so excited about it?"

"I don't know, either," Barby added.

Hartson Brant looked at his son. "You do, don't you, Rick?"

"I know what it is, but I don't know why it's so important to Steve,"

Rick said. He had read a great deal about heavy water in studying elementary physics. It had many uses in physics experiments.

"Let's see how much you know," Steve directed. "Sound off."

Rick searched his memory, trying to marshal all the facts he knew.

"Well," he began, "ordinary water is composed of oxygen and hydrogen. In every water molecule there are two atoms of hydrogen and one of oxygen.

The important part, for what we're talking about, are the hydrogen atoms. Hydrogen is the lightest element, and it has the simplest atom.

There's just one proton and one electron."

He looked at his father, waiting for a nod to tell him he was on the right track. When the scientist nodded approval, he went on.

"That kind of hydrogen atom has a ma.s.s of one, as the scientists say.

But there are other kinds of hydrogen atoms, and they are pretty rare, called isotopes. An isotope is just a different variety of the ordinary kind of atom in each element. The thing that makes it different is a change in the nucleus. Well, hydrogen has two isotopes. One kind, which has a ma.s.s of two, is found in nature. It is called deuterium. Its nucleus is called a deuteron. Another kind, which can be made in a nuclear reactor, is called tritium. A little of it is found naturally but not enough to count for much."

He took a deep breath. "I hope I know what I'm talking about."

"You're doing fine," Hartson Brant said. "Go on."

"All right. Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen. In chemistry, there's no difference in the way heavy water acts. You can even drink it. In fact, people do drink it every day, because in ordinary water there is some heavy water. I forget the exact figures, but I think that, by weight, there are five thousand parts of ordinary hydrogen in water and only one part of deuterium."

"That's right." Steve Ames nodded. "Five thousand to one. Now tell us what is peculiar about all isotopes?"

Rick thought furiously and came up with what he hoped was the answer. "I think it's that isotopes aren't as stable as the basic elements. Some are pretty stable, but some are pretty shaky. That's why some of the isotopes of uranium can be split wide open in a chain reaction to make an atomic bomb, and ..."

A chill ran through him. His mouth opened. He knew! He knew why heavy water had Steve Ames all excited. He choked:

"Hydrogen bombs!"

Scotty and Barby gasped. Steve Ames and Hartson Brant smiled.

"It's true that one of the possibilities in building a hydrogen bomb concerns deuterium," the scientist said. "But I scarcely think that's the case here. How about it, Steve?"

"Possible, but extremely improbable," Steve agreed. "What I'm most interested in is a use for heavy water Rick hasn't mentioned. Know what a nuclear reactor is, Rick?"

Rick nodded. "It's what the newspapers usually call an 'atomic pile.' We have quite a few in this country, I think. The Atomic Energy Commission said quite a while ago that they used a nuclear reactor with uranium as a fuel to make plutonium, which is the artificial element that can be used in atomic bombs. Besides uranium itself, that is."

"That's right. What I'm interested in is the fact that heavy water can be used as a neutron moderator in a reactor."

Rick looked blank. Steve was talking way over his head. Hartson Brant saw his son's bewilderment and explained: "You've probably heard that the uranium in a reactor is encased in blocks of graphite, which is simply carbon, Rick. It prevents the neutrons from the uranium from simply running wild. Well, heavy water can be used for the same purpose."

"Exactly," Steve said. "So you see, I'm not afraid of the possibility of hydrogen bombs as much as I am of the possibility that somewhere in Asia is a nuclear reactor. Until we get international agreement on atomic weapons, we simply have to keep track of atomic developments everywhere for our own protection. If there's a new country going in for atomic research, and it can build a reactor, it might also be able to build an atomic bomb. Now, don't forget I said heavy water is a legitimate industrial product. We certainly can't object to a nation's manufacturing it. We wouldn't want to. But when it turns up in an odd corner of the world, I think we'd better find out why. If it's a peaceful reason, we'll mark it down and then forget it. If not, we'll make a report to the United Nations."

"Why not report it right now?" Barby asked.

"Good question. The answer is, we're not sure. Remember Carl Bradley was unsure enough to ask for help. If we got up before the UN and started hollering and it turned out to be plain water, we'd look pretty foolish."

"I don't even know how we'd begin," Scotty muttered. "How do you start on a job like this?"

"You'll start by being innocent tourists," Steve said. "You and Rick are students on a holiday, with Zircon, your uncle, as guide and tutor.

You'll be interested in a number of things, including hunting. That will give you a good excuse for barging around the country if you have to.

But you won't be able to decide what you want to hunt." Steve grinned.

"You'll decide after you find out where you have to go. And you'd better learn about Asiatic game animals. For instance, if the trail takes you to Indonesia, you may want to hunt the hairy Sumatran rhinoceros. In the Philippines, you'll hunt timarau, which are a special breed of wild water buffalo. In China, around the coast, you can hunt tigers. In Malaya, if the trail does take you down to Singapore, you can hunt tapir. Same for Siam. In Indo-China you can hunt tigers. Inland in China, toward the Tibetan border, you'd better be hunting bharals."