Double Star by Robert Heinlein:
Science Fiction Inventions, Technology and Ideas

Terrific Heinlein; social upheaval on two planets, politics, spacemen, and real Martians. Lorenzo Smythe, an out-of-work actor is given the role of a lifetime (somewhat involuntarily) and the opportunity to act on a somewhat larger stage than he is accustomed to. Select an invention:

Bounce Tube - pneumatic tube system for people
A people-sized pneumatic tube system used for short, quick trips in the vertical dimension.

Cider Press - acceleration made bearable
Device used to make acceleration above 1 gravity more tolerable for groundhogs.

Hush Corner - noise reduction
A space made private by canceling sound waves in that area.

Maximum-security Booth - high security phone system
A special phone booth for receiving high-security, scrambled telephone calls, calls which included 3D visuals.

Teakettle - booster rocket
A standard rocket (uses hydrogen as a booster to leave the atmosphere).

Vacutubes
A system of public transportation that used partially evacuated tubes and capsules big enough for passengers.

 

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