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      Scientific American June 15, 1918

      Making America Self-Supporting

      Breaking Germany's Monopoly on Sugar-Beet Seed

      • By Truman G. Palmer on June 15, 1918

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      More in the June 15, 1918 issue of Scientific American
      • Our Wartime Barrel of Oil, The Amazing Case of General Wood, and more
      • Surgery by Mathematical Formula
      • Shoes for Soldiers
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