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Details of a German Bomb Sight

Our Search For The Supernatural-II

Did Queen Elizabeth's Spirit Appear?

By A. D. Rathbone

What Light for Industry?

Relative Freedom from Heat and Glare, Plus Color Control. In Fluorescent Tubes

By A. P. Peck

New Porcelain Insulation

High Mechanical Strength and Electrical Resistance in Die-Pressed Material

By H. T. Rutledge

Inspection, Timer, and more

Gamma Rays Pierce Steel, Show Defects

A Strange Picture

Chairman of the Department of Astronomy and Director of the Observatory at Princeton University. Research Associate of the Mount Wilson Observatory of the Carnegie Institution of Washington...

By Henry Norris Russell

Quality in Warplanes

How the British. Out-Numbered in Aircraft, Forced a Change in German Tactics

Speed and Sting--The M. T. B.'s

Motor Torpedo Boats Attain Speed of 60 Knots, Carry Four Torpedoes, Machine Guns

Atom Smashing: Two Methods

Why the Weaker Electrostatic Atom Smasher Thrives Despite the Powerful Cyclotron

By C. W. Sheppard

Petroleum Research, Home-Idity, and more

Increased 539 Percent in Eleven Years

Human Hibernation

What Today of the Frozen Sleep Therapy for Cancer? Failure, or Success?

By Barclay Moon Newman

Like Humans

Bacteria Have Their Own Periods of Weakness

Electrical Gold Mining

Giant Dredge and Gold Recovery Plant Are Gleaning Gold Near Famous Comstock Lode

Pulling the Wool off Your Eyes

"New Federal Law" Defines Wool, Sets Up Standards for Labeling Fabrics Honestly

Lubricant Washes the Engine

Designed for Heavy-Duty Gasoline and Diesel Engines, New Oil has Detergent Properties

Spray Poison, Aniseikonia, and more

Kills Codling Moth Worms, Spares Bees

Supercharging the Pilot

Aeroembolism Prevented by Pre-Flight Administration of Oxygen

By Alexander Klemin

Plane Location, Plane Conversion, and more

Triangulation-Plus Spots Transports


  • 50 Years Ago, May 1941

  • From the Editor

    Our Point of View, May 1941

  • Recommended

    Our Book Corner, May 1941

  • Departments

    Industrial Trends, May 1941

  • Camera Angles, May 1941

  • Your Firearms and Fishing Tackle, May 1941

  • Telescoptics, May 1941

  • Current Bulletin Briefs, May 1941

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