Vol. 19 No. #532
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More Stories from the June 20, 1931 issue

  1. Front Matter

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  2. Earliest Americans Hunted Ice Age Beasts with Stone Darts

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  3. Moon Found to Have Influence on California Earthquakes

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  4. [Photograph]: Cold-Blooded Maternity

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  5. New Slow Electron Compass Points East Instead of North

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  6. X-Rays Relieve Baby’s Stomach Obstruction

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  7. New Seismograph Records Earthquakes beneath It

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  8. Death of Universe Required by Physical Law May Be Avoided

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  9. Mixing of Races Brought Greatness to Nations

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  10. Difficulty in Birth May Cause Dullness

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  11. June 22 Gets Most Sun, but Hottest Weather Comes Later

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  12. New Epilepsy Test May Avert Train Wrecks

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  13. In Science Fields

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  14. Harmless Relative Fights Germ of Syphilis to Cure Paresis

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  15. European Wisent Crossed with American Buffalo

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  16. New Earthquake Observatory Is Examined by Scientists

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  17. Nebulae Composed of Gases “A Classic of Science”

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  18. Mysterious Mexican Blindness Is Traced to Turkey Gnat

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  19. Sudden Thunderstorms Trouble Night Flying

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  20. Light Keeps Original Speed at End of 70,000,000 Years

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  21. Cancer Patients Alive Five Years after Operation

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  22. Peptic Ulcer Patients Are High-Strung

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  23. Man Lived 38 Years with Broken Spine

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  24. Food Is Used as Lure to Train the Feebleminded

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  25. Multiple Sclerosis Treatment by Electricity Is Hopeful

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  26. Nature Ramblings: Locust Trees

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  27. Sea Creatures Depend on Seemingly Remote Influences

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  28. First Glances at New Books

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