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"A good science fiction story should be able to predict not the automobile but the traffic jam."
- Frederik Pohl

Radiation Trap Helmet  
  A very specialized helmet for use in mines with radiation.  

ARMORED, but carrying his heavy helmet under one arm, Blane stepped aboard the shaft cage and was whisked downward at a rate that threatened to make his stomach misbehave. The six thousand foot drop was made in darkness relieved only by the feeble glow of the cage lamp. At the bottom Faulkner was waiting, completely armored. Blane put on his helmet.


(Radiation trap helmet from 'Radiation Trap' by Harry Walton)

Made of heavy gauge metal, this headpiece was equipped with mirrors which reflected light from outside around a number of baffle plates. These blocked radiation but left the helmet open to the air. The wearer could see clearly, although within a limited angle of vision, and could both breathe and speak naturally.

Technovelgy from Radiation Trap, by Harry Walton.
Published by Astonishing Stories in 1941
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