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      Scientific American October 1980

      The Amateur Scientist, October 1980

      A home made mercury-vapor ion laser that emits both green and red-orange

      • By Jearl Walker

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      More in the October 1980 issue of Scientific American
      • Books, October 1980
      • Positron-Emission Tomography
      • The Bizarre Spectrum of SS 433
      View Full Contents
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