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    The Best-Laid Scheme by  L. Sprague de Camp: 
      Science Fiction Inventions, Technology and Ideas
    Excellent time-romp features a disheveled little man who discovers how to do backward-jumping in time. But won't that cause changes in our present? What happens if you send someone back to chase him? But I digress.
The ending is pure de Camp.
 
  
 
 Select
      an invention: 
    
         Paralyzing Eye  False eye contains mechanism for causing brief paralysis.
           
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         Vanwinkling  Another name for time-traveling into the future.
           
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Technovelgy.com is devoted
      to the creative inventions of science fiction authors and movie makers. Look
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      interests you, the Glossary of Science Fiction
      Inventions, the Timeline of Science Fiction
      Inventions, or see what's New. 
  Find new authors and technologies - Shop for yourself,
  your library and your lab. 
  
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	Science
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