Vol. 20 No. #535
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More Stories from the July 11, 1931 issue

  1. Super-Giant Star Discovered in Large Cloud of Magellan

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  2. Copper Put into Auto Valves to Make Them Last Longer

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  3. [Photograph]: Good to Eat: And Safe

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  4. New Transmission System May Bring Power Greater Distances

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  5. Mastodon Remains Found in Turkey

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  6. Some Elements Yielded by Yttrium: “A Classic of Science”

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  7. Drinking Troughs Preserve Rare African Elephants

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  8. New Studies Cast Doubt on Cancer Treatment Value

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  9. In Science Fields

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  10. The Dog’s Family Tree

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  11. Electric Heating Keeps Chickens Warm

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  12. Unlike Relatives, Trout Prefer to Stay Home

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  13. Research Results Lie Fallow Unless “Sold” to Public

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  14. Mummy’s Interior Studied without Spoiling Exterior

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  15. Trumpeter Swans Again Nesting in Yellowstone

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  16. “Healthy Savage” Myth Hit by Research on African Natives

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  17. Children Are More Alert than Their Teachers

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  18. Nature Ramblings: Garden Spiders

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  19. Studies Show That Alcoholism May Be Part Cause of Pellagra

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  20. “Giant” Indian Skeletons Turn out to Be Ordinary

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  21. First Glances at New Books

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  22. Front Matter

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  23. Hot Waves Bring Northwest Grasshopper Invasion Menace

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  24. Female Gland Extract Checks Bleeders’ Disease in Males

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