Coventry by Robert Heinlein:
Science Fiction Inventions, Technology and Ideas

Coventry is classic Heinlein; lots of interesting devices that nobody thought of in 1940, and more social and political commentary on the rights of the individual versus the rights of the states. Select an invention:

Air Blast - the first air dryer

Barrier (Force Field) - force field fence

Knockdown Cabin - portable shelter

Refreshing Chamber

Steel Tortoise - the original ATV

Sunpower Screen - photovoltaic cells power vehicle

 

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