Vol. 35 No. #13
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More Stories from the April 1, 1939 issue

  1. Earthquake History of U. S. Compiled by Coast Survey

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  2. WPA Built 154 Airports, Improved 494 Others

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  3. Confirm Release of Neutrons from Splitting Uranium Atoms

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  4. Fire Aloft May Be Conquered by Safe Fuel and New Engines

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  5. Refugees and Air Raid Plans Bring Europe Health Problems

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  6. Sterilizing Lamp Tenderizes Tough Hamburger Beef

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  7. New Air Corps Bombers Rated at near 400 M.P.H.

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  8. Mechanical Model Shows How Electric Waves “Look”

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  9. Hitler Must Deal with New Racial Problems

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  10. Wing of Stratoliner Same as Flying Fortress

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  11. In Science Fields

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  12. Unique Sailing Ship Will Cruise Seas for Science

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  13. Solve Math Problem of Egyptian Workmen

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  14. Color Blindness May Be in Mind as Well as Eyes

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  15. Fate of King Solomon’s Gold May Be Revealed in Find

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  16. Whey Product Makes Cloth Resistant to Poison Gas

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  17. Obsolescence Is No Worry to Purchaser of Radio

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  18. Nest Protection Aids Eider Ducks’ Return

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  19. Nature Ramblings: Spring Flowers Are Short

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  20. Special Microscope Mount Shows Growth of Cells

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  21. New Sweet Corn Variety Resistant to Ear Worms

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  22. Soil Moisture Measured by Electric Current

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  23. First Glances at New Books

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  24. Front Matter

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  25. Find “Extinct” Fish Alive in South African Waters

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