Feature

  1. Prohibition Investigated

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  2. Nature Ramblings: Hay Fever Weeds

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  3. Clay Tells of Ice Age

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  4. Indian Mound Hides Graves

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  5. To Study Ancient Races

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  6. First Glances at New Books

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  7. Anniversaries of Science

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  8. “Hard Boiled” Bacteria

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  9. The Fly

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  10. Back Matter

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  11. Front Matter

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  12. Floating Islands for Transocean Air Routes

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