Vol. 19 No. #526

More Stories from the May 9, 1931 issue

  1. Parenthood Seems to Depend on Inorganic Manganese

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  2. Earth’s Magnets Quiver Day after Outburst on Sun

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  3. California Astronomer Chosen National Academy President

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  4. [Photograph]: Insatiable Curiosity

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  5. Python Likes New Home; Lays Clutch of Eggs

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  6. Pressure of Sunlight Strong Enough to Break Comet in Two

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  7. New Camera Photographs Disease in Ear

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  8. Lifeless Drops Can Act as If They Had Life in Them

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  9. Cancer Kills More Quickly as Blood Alkalinity Rises

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  10. Five Hundredth of an Atom’s Diameter Measured Exactly

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  11. Gas Made Non-Poisonous by Famous German Chemist

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  12. [Photograph]: Mobile Beacon of the Seas

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  13. Hair and Eye Color Are Index to One’s Emotional Behavior

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  14. Magnetic Storms Most Frequent at Equinox

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  15. Orchid Greenhouse Rotates to Catch Full Sunlight

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  16. In Science Fields

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  17. Home of America’s Vestal Virgins

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  18. New Self Respect Sought for Dementia Praecox Patients

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  19. Man Must Use Brains to Sleep Normally

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  20. Birds Excel Man’s Airplanes as Efficient Flying Machines

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  21. Tropical Disease of Cattle Gains Foothold in U. S.

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  22. Health Officials Act on Methanol Regulation

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  23. Nature Ramblings: Solomon’s Seal

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  24. New Kind of Toxin May Yield Serum for Many Diseases

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  25. Bacteria-Eating Protozoa Thrive Best on Mixed Diet

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  26. First Glances at New Books

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  27. Front Matter

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