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      Scientific American January 20, 1917

      Our Waning Food Supply

      What the Census Bureau Can Tell Us About the High Cost of Living

      • January 20, 1917

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      More in the January 20, 1917 issue of Scientific American
      • The Vast Literature of Mathematics, German Substitutes for Rubber Bicycle Tires and more
      • A Portable Skating Rink, Launching the Largest Gold Dredge, and more
      • Recently Patented Inventions- January 20, 1917
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