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      Scientific American October 1998

      50, 100 and 150 Years Ago: Red Scare, Ethereal Chemistry and Modern Barometer

      Articles from the Scientific American archive

      • October 1, 1998

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      More in the October 1998 issue of Scientific American
      • Digital Certificates
      • How Hackers Break In. . . and how they are Caught
      • Letters to the Editors, October 1998
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