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Features

Air Conditioning and Lights Tenderize Beef

Ersatz Motor Fuels

Europe's Desperate Nationalisms Force Use of Native Fuels, To Conserve Gasoline for Possible War, Result: Enorlnous Net Monetary Losses

By Gustav Egloff

Lies -- Truths

Now that the Lie Detector Has Been Used by the Wichita Police for Three Years, How Successful Has it Proved? A Progress Report

By Thomas Hayes Jaycox

The Future of Navies

Second of Two Parts: Carriers, Cruisers, Destroyers, Submarines, Ships Building, Dimensions, Armor, Armament, Comparisons

By Oscar Parkes

Airplanes, Unlimited!

Molded Fuselages and Wings Make Possible Mass Production. Plastics Employed. 36,000 Planes a Year, Tremendous Wartime Significance

By Forrest Davis

What Keeps the Stars Shining?

According to Bethe's Theory, the Most Notable Achievement of Theoretical Astrophysics of the Last Fifteen Years, It is Atomic Transfortations

By Henry Norris Russell

Rubber's 'Little Brother'

Rubber-Like Material,Made of Limestone, Coke, Salt,Superior to Rubber in Several Ways, Not Yet Adapted to Automobile Tires

By Florian E. Wood

Relativity--20 Years After

An Evaluation of the Achievements of the Special and General Theories of Relativity During the 20 Years which Have Elapsed since the First Direct Observational Test of the General Theory

By H. P. Robertson

Looking for Trouble

The Great American Rite

Are Tonsils Useful? What Many Doctors Think About the Too Casual and Routine Removal of Tonsils, The Public Is Partly to Blame.

By T. Swann Harding

Departments

  • 50 Years Ago, July 1939

  • From the Editor

    Our Point of View, July 1939

  • Recommended

    Our Book Corner, July 1939

  • Departments

    The Screen of Television, Small Arc Welder, and more

  • Camera Angles, July 1939

  • Camera Angles Round Table, July 1939

  • Telescoptics, July 1939

  • Current Bulletin Briefs, July 1939

  • Legal High-Lights, July 1939

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July 1939

Think Outside the Gift Box