Martian Guns by Stanley D. Bell:
Science Fiction Inventions, Technology and Ideas

Intriguing story of Martians who build a gun on the Moon to attack the Earth; presages Heinlein's use of this plot idea in The Moon is a Harsh Mistress.


(Martian Guns by Stanley D. Bell)

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Reaction Pistol - zero gee maneuvering
A hand-held device for maneuvering in zero gravity in a space suit.

 

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