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Updated: May 18, 2025
It had two very simple controls, and a highly ingenious gimmick which kept it from turning itself on by accident. In an oblique fashion, it was a heat-pump. One control turned it on and intensified or diminished its effect. The other controlled the area it worked on. In any material but iron, it made heat flow together toward the center of its projected field.
If the device could be reversed, deserts would become temperate zones. As it was, the Arctic and Antarctic could be made to bloom. The gadget was an out-of-doors heat-pump. There was the box with the plastic sheet in it. One of the boys, very composed, operated it. On request, he opened it up. There was nothing in the case but a few curiously shaped bits of metal.
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