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      Scientific American September 1929

      Current Bulletin Briefs, September 1929

      Short Reviews of Bulletins and Papers on Scientific and Allied Subjects, and Where to Get Them

      • September 1, 1929

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      More in the September 1929 issue of Scientific American
      • From the Scrap-Book of Science, September 1929
      • Looking Ahead With the Editor, September 1929
      • Our Point of View, September 1929
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