recognized the name. But go on. What—"

"Garrett communicated with dad, secretly. He posed as Starrett Blade, as you, and told dad that he was developing certain new power processes. And he is! He has a new—or maybe it isn't so new—way of electrolyzing water to liberate hydrogen and oxygen."

"I think I understand," said Star quickly. "When the oxygen and hydrogen are allowed to combine, and produce an explosion which drive a turbine-generator. Then that could be hitched up to a cyclotron, and even the most barren of Alpha's lake-rock planets could be...."

"No," she shook her head puzzledly. "It's just electric power. He said that atomics would release stray rays that would attract pirates."

"I know," Star nodded, abstractedly. "I was thinking of another application of it ... hmm. But say! What was Garrett after? I know that he wouldn't do this just to get a secret process sold. He must have had another plan behind it. Got any idea?"

Anne shook her head slowly. "I don't know. I can't see...."

"Perhaps I could help you?" Devil Garrett asked smoothly from the door.

Star whirled, thrust Anne behind him, but there was no way out. Garrett stood in the door, and there were men behind him. The jet in his hand could kill both of the two at one shot. And they had no weapons to resist with.

Devil Garrett stepped them out of the room, and down the corridor, through a large door Star had noticed at the end of the passage, and into a huge room.

It must have been a thousand feet long, and half that wide. It was at least a hundred yards deep. And it was almost filled with gigantic machines.

Between the machinery, the spaces were almost filled with steel ladders and cat-walks. Crews of men swarmed over them. It was the largest mass of equipment Starrett had ever seen.

His eyes began to pick out details. Those huge vat-like things down at the far end, with the large cables running into them, and the mighty pumps connected to them ... they were probably the electrolysis chambers.

And those great pipes, they must carry the hydrogen and oxygen from the electro chambers to the large replicas of engines, which could be nothing else but the explosion chambers, where the gases were allowed to re-unite, and explode. And there 

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