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"I love that computer science has made mathematics into something like an experimental science. I was never all that good at proving things, but I love doing computer experiments."
- Rudy Rucker

Magnetic Eyes  
  A device that permits remote monitoring of people or other objects.  

"`Magnetic eyes' are of great use to miners and Civil engineers. These instruments are something like the mariner's compass, with the sensitiveness enormously increased by galvanic currents. The `eye,' as it were, sees what substances are underground, and at what distances. It also shows how many people are in an adjoining room -- through the magnetic properties of the iron in their blood whether they are moving, and in what directions and at what speed they go. In connection with the phonograph and concealed by draperies, it is useful to detectives, who, through a registering attachment, can obtain a record of everything said and done.
Technovelgy from A Journey In Other Worlds, by John Jacob Astor IV.
Published by D. Appleton and Co. in 1894
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Additional resources:
  More Ideas and Technology from A Journey In Other Worlds
  More Ideas and Technology by John Jacob Astor IV
  Tech news articles related to A Journey In Other Worlds
  Tech news articles related to works by John Jacob Astor IV

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Science Fiction in the News

Jetson ONE Air Races Begin, Can Air Polo Be Far Behind?
'If you're one of those rarities who haven't attended a rocket-polo "carnage", let me tell you it's a colorful affair.'

Will Space Stations Have Large Interior Spaces Again?
'They filed clumsily into the battleroom, like children in a swimming pool for the first time, clinging to the handholds along the side.'

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Bipedal Robot Floats Gently While Walking
'a walking balloon proceeded with long strides of its aluminum legs...'

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'...a misshapen, many-tentacled thing about twice the size of a man.'

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Where have you gone, Mrs. Robinson?

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