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20 years of Broadcasting

Time to the Second

Modern Tempo of Living Requires Close Timing

By Mortimer H. Cobb

Better Health From the Sea

Vitamin A from Shark Livers, Varied Products from Weeds, Form Growing Industries

By Andrew R. Boone

Verification, Eyesight, and more

An Ice Bag on The Forehead Lowers Brain Temperature: Given to Blind Person Necessitates Adjustments; Beat As One, in a Manner of Speaking

Fighting Friction

Just How Friction Operates Between Metals Is Not So Simple as it Sometimes Seems

By Walter L. Finlay

Photometer, March of Technology

Eliminates Human Element In Spectrographs Analysis; Research Necessary to Plan For More Stable Economy

Sun-Spot Distribution

What Had Seemed to be an Anomaly Proves to be an Optical Effect with Odd Cause

By Henry Norris Russell


Network of Seaplane Floats Dots Waterways

Robot Photographic Observer

Army Air Corps Develops Power-Driven Movie Camera for Test Flights

By Alexander Klemin

Cockpit Release, Test Tower

We Build More Ships

Our Merchant Fleet Adds About One Ship A Week—Efficient, Economical, Safest

By W.Creighton Peet Jr.

Floating Power Plant, Test Bomb

Would See Service In Emergencies; Determines Power Of Explosives

Eye Science Moves Forward

Vision, Precious to All of Us, is Aided and Saved By Optical Industry's Developments

By J. F. Neumueller

Extruded Metals, Bearing Checker, and more

Process Common Abroad, Little Known Here

What is 'FM'?

Frequency Modulation Broadcasting Offers Improved Sound Range, Freedom from Noise


Half Soles, Shockless Fuse, and more

Grand Prize Winners

Legal High-Lights

Patent, Trade Mark, and Related Legal Proceedings That May Have a Direct Effect on Your Business

By Orson D. Munn


  • 50 Years Ago, February 1941

  • From the Editor

    Our Point of View, February 1941

  • Browsing with the Editor, February 1941

  • Recommended

    Our Book Corner, February 1941

  • Departments

    Personalities in Industry, February 1941

  • Industrial Trends, February 1941

  • Camera Angles, February 1941

  • Your Firearms and Fishing Tackle, February 1941

  • Telescoptics, February 1941

  • Current Bulletin Briefs, February 1941

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