Feature

  1. Between the Ears

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  2. Modern Mayas May Explain Ancestors

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  3. Blind Good Listeners

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  4. Urge Study of American Medical History

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  5. Child Ills Increase

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  6. Front Matter

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  7. Two New Vitamins

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  8. Infantile Paralysis

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  9. Making Gas from Cornstalks

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  10. Nerves like Radio

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  11. Scientific Ape Colony

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  12. Medical Examinations for Students

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