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      Scientific American January 1973

      The Amateur Scientist, January 1973

      An inexpensively modified transistor radio is used in several entertaining experiments

      • By C. L. Stong

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      More in the January 1973 issue of Scientific American
      • 50 and 100 years ago, January 1973
      • Snow Crystals
      • How the Immune Response to a Virus Can Cause Disease
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