“All right. Fine. But you’re going to be surprised when you see what’s in here.”

“I probably will. I’ve been expecting a surprise,” Thorn said.

What he got was a real surprise.

There was a small pressure tank of hydrogen inside—one of the little ones that are sometimes used to fill toy balloons. There was a small batch of electronic circuitry that looked as though it might be the insides of an FM-AM radio.

All of the rest of the space was taken up by batteries.

And every single one of the cells was a familiar little cannister. They were small, rechargeable nickel-cadmium cells, and every one bore the trademark of North American Carbide & Metals!

One of the other men in the lab said: “What kind of a joke is this?”

“Do you mean, Mr. Sorensen,” Thorn asked with controlled precision, “that your million-dollar process is merely some kind of gimmickry with our own batteries?”

“No,” said Sorensen. “It’s—”

“Wait a minute,” said one of the others, “is it some kind of hydrogen fuel cell?”