Ersatz Motor Fuels
Europe's Desperate Nationalisms Force Use of Native Fuels, To Conserve Gasoline for Possible War, Result: Enorlnous Net Monetary Losses
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
The Future of Navies
Second of Two Parts: Carriers, Cruisers, Destroyers, Submarines, Ships Building, Dimensions, Armor, Armament, Comparisons
Molded Fuselages and Wings Make Possible Mass Production. Plastics Employed. 36,000 Planes a Year, Tremendous Wartime Significance
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
Rubber's 'Little Brother'
Rubber-Like Material,Made of Limestone, Coke, Salt,Superior to Rubber in Several Ways, Not Yet Adapted to Automobile Tires
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...
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.
50 Years Ago, July 1939
- From the Editor
Our Point of View, July 1939
Our Book Corner, July 1939
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