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The Derelicts of Ganymede by John W. Campbell:
Science Fiction Inventions, Technology and Ideas
Fast-paced tale has communication inventions, beryllium from the Moon, trips to Mars and more.

(Derelicts of Ganymede by John Campbell)
Select
an invention:
Daisy Projector Beam of energy penetrates the Heaviside layer to enable communication from planet to planet.
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