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"The writing is clicking away in my head and piling up, and unless I get it on paper somehow it's going to create uncomfortable pressure in my skull."
- Isaac Asimov

Emotion Meter  
  A device for empirically determining human emotion.  

You have probably all heard of the lie-detector which is now in use in some police departments in connection with crime. I have greatly improved upon it. My invention takes into consideration many more physical changes in the human body. It measures heartbeat, breathing, body temperature and increase or decrease of gland secretion. All of these are affected by emotion.
From The Emotion Meter, by W. Varick Nevins, III.
Published by Thrilling Wonder Stories in 1935
Additional resources -

Compare to HAL 9000 from 2001: A Space Odyssey (1968) by Arthur C. Clarke. In Star Trek: The Next Generation, Data has an emotion chip. Also, see Emotional Register from The Primal Urge (1961) by Brian Aldiss.

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Additional resources:
  More Ideas and Technology from The Emotion Meter
  More Ideas and Technology by W. Varick Nevins, III
  Tech news articles related to The Emotion Meter
  Tech news articles related to works by W. Varick Nevins, III

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