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"This category [science fiction] excludes rocket ships that make U-turns, serpent men of Neptune that lust after human maidens, and stories by authors who flunked their Boy Scout merit badge tests in descriptive astronomy."
- Robert Heinlein

Sleep-Inducer  
  A device that electronically imposes sleep on a human being.  

Merton snapped the elastic bands of the cabin seat around his waist and legs, then placed the electrodes of the sleep-inducer on his forehead. He set the timer for three hours and relaxed.

Very gently, hypnotically, the electronic pulses throbbed in the frontal lobes of his brain. Colored spirals of light expanded beneath his closed eyelids, widening outward to sleep.


(Sleep-inducer from Boy's Life)

From Sunjammer, by Arthur C. Clarke.
Published by Boy's Life in 1963
Additional resources -

Compare to sleep surrogate from Robert Heinlein's 1941 novel Methuselah's Children, the sleep set from Larry Niven's 1970 novel Ringworld and the napcap From Niven and Barnes' 2000 novel Saturn's Race.

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Additional resources:
  More Ideas and Technology from Sunjammer
  More Ideas and Technology by Arthur C. Clarke
  Tech news articles related to Sunjammer
  Tech news articles related to works by Arthur C. Clarke

Sleep-Inducer-related news articles:
  - Sleeep PRO Earplug For Maximum Rest

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