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      Memorial Day Sale

      Scientific American June 1925

      Out of Doors With the Earth

      With a Simple Vacation Equipment, the Amateur May Easily Learn the Meaning of the Earth's Ever-varied Geological Features

      • By Albert G. Ingalls on June 1, 1925

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      More in the June 1925 issue of Scientific American
      • Herbert Hoover and the Patent Office
      • News for Inventors, June 1925
      • Science and Money, June 1925
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