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Strong suddenly thought of the professor's investigation of the landing disturbance. It could only have been the result of radioactivity in a large mass. So the professor must have discovered a large deposit of uranium. Strong's mind raced on. Sykes would have taken the report to Vidac or Hardy, or both, and Strong forced himself to stop thinking.

The first and most difficult job was building a gigantic maneuverable derrick and jet barge for removing, hauling, and installing the heavy machinery. Astro had been assigned to the crew responsible for the construction of the jet barge. With many of the vital parts aboard the crashed freighters still hot with radioactivity, the crew had to improvise.

But this radioactivity hardly attains the ten-thousandth part of that presented by uranium, or the ten-millionth of that appertaining to radium. Two other bodies, polonium and actinium, the one characterised by the special nature of the radiations it emits and the other by a particular spectrum, seem likewise to exist in pitchblende.

We'll have to organize an expedition to Brazil, sometime, to get seeds and try raising some." Loudons blew a smoke ring toward the rear of the cabin. "A much overrated beverage," he replied. "We found some, once, when I was on that expedition into Idaho, in what must have been the stockroom of a hotel. Vacuum-packed in moisture-proof containers, and free from radioactivity.

Jimmy Holden sat back and remembered. The vacuum that was to follow the loss of his parents was not yet in evidence. They were gone and the knowledge made him unhappy, but he was not cognizant of the real meaning or emotion of grief. Burned and ruined, with the atomic energy kit and he had hoped that he could use the kit to tease his father into giving him some education in radioactivity.

In the physical sciences, electricity, for example, years of co-ordinated world progress are required to produce an epoch-making discovery which might have critical and direct war significance. Radioactivity has shown us what undreamt-of energy is bound up in the atom, and many are the prophesies regarding the harnessing of these forces for constructive activities.

"As for heat, I've been wondering about that. It must be due to internal heat, because even though Jupiter may be warm, or even hot, it certainly isn't radiating much, since it has a temperature of minus two hundred at the visible surface, which, of course, is the top of the atmosphere. Our heat here is probably caused by radioactivity that's the most modern dope, I believe.

The substance emanated can neither be weighed nor can its elastic force be ascertained; but its transformations may be followed, as it is luminous, and it is even more certainly characterised by its essential property, i.e. its radioactivity.

"That crater looks peculiar, like a meteor had struck here but those stunted plants hmm there must have been some radioactivity too." He looked at the crater speculatively. "Now I wonder " he began. Copper had turned a sickly white. "No!" she said in a half-strangled voice "oh, no!" Kennon looked at her. "You know what this is?" he demanded. "No," Copper said. But her voice was unsteady.

The hull was probably too radioactive to approach from the outside. And radioactivity cools off slowly. It might take several lifetimes for its level to become low enough to approach if there was no decontamination equipment available." "I suppose that's why the early ones thought the Egg was cursed." Kennon nodded. "Now let's check oh! oh! what's this?"