Feature

  1. First False Teeth

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  2. First Glances at New Books

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  3. Nature Ramblings: Beaver Ways

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  4. Classics of Science: Malthus on Population

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  5. Front Matter

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  6. 3,400,000,000 Years Young

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  7. America a Melting Pot for Animal Stocks

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  8. Foolproof Matches and Cigarettes

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  9. Health Field Open

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  10. Airplanes Noisy If Engines Muffled

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  11. The Scientist’s Jig-Saw Puzzle

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  12. Separated Twins Become Unlike

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