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Low Cost Cure for Radio Interference

The Future of Navies

Powers Build Larger Battleships: Sizes, Armament, Armor, Use, Effectiveness

By Oscar Parkes

How Metals Relax

Research Engineers Demonstrate that Metals Stretch and Lose Their Grip with Time and High Temperature

Controlling the 'Heat'

Relativity--20 Years After

By H.P. Robertson

Railroading's Latest Chapter

By C.P. Fisher

Sulfanilamide And Sulfapyridine

Now that Enough Time has Elapsed to Permit Calm Estimate of These Newly Developed Drugs, How and Where do They Stand in the World of Medicine ?

By Barclay Moon Newman

Cold Light

If Man Can Discover the Secret of the Firefly, the Effect will he Far-reaching,Experiments in Which man Tries to Imitate Nature's Successes

By Evans W. Cottman

Color on a Huge Screen

What Keeps the Stars Shining?

For the Source of Stellar Energy We Must Look To Reactions Between Charged Atomic Nuclei, Discussions and Background for Bethe's Theory

By Henry Norris Russell

They Never Say 'No'

"Prop Men" Furnish the Thousands of Odd Items That Make Motion Pictures More Realistic

By Andrew R. Boone


  • 50 Years Ago, June 1939

  • From the Editor

    Our Point of View, June 1939

  • Recommended

    Books Selected by the Editors, June 1939

  • Departments

    Food in a Balloon, Pilot Valve, and more

  • Camera Angles, June 1939

  • Camera Angles Round Table, June 1939

  • Telescoptics, June 1939

  • Current Bulletin Briefs, June 1939

  • Legal High-Lights, June 1939

  • Index To Volume 160, January-June, 1939

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