Feature

  1. First Glances at New Books

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  2. Two Weeks’ Delay Precedes X-Ray Sterility in Mice

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  3. Engineers Plan Program of Movie Standardization

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  4. Better Trees Being Bred for Future Forest Crops

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  5. Larger Families May Again Become Fashionable

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  6. September Evening Skies

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  7. X-Rays Can Speed up and Reverse Evolution

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  8. Front Matter

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  9. Indian Drum Religion Is Thriving American Cult

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  10. New Race of Fossil Men Found in North Africa

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  11. Nature Ramblings: Lovers of Open Fields

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  12. Science Explains Hang-over after Alcoholic Debauch

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