Feature

  1. Most Delicate Flint Work

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  2. Books of the Week

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  3. New Machines and Gadgets

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  4. Extreme Cold Key to What Makes Steel Really Hard

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  5. Search for Scientists

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  6. Replacement of Teeth

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  7. Student Deferment Urged

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  8. Front Matter

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  9. Ozone as Preservative

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  10. [Photograph]: Maps Needed

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  11. Typewriter Makes Sheet Music Symbols

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  12. Tree Production Speed-up by Wires, Cutting Roots

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