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Features

Long Range Defense

Inventions Win Wars

Suggested Developments, To Detect, Defeat Warplanes, Submarines, Humanitarian Aspects, Physical Principles Which Inventors Must Follow

By William H. Wenstrom

Seismographing for Oil

History in a Bog

Forest Managers Beginning to Use a Method of Long-range Climatic Prediction, Based on the Study of Fossil Pollen Grains with Microscopes

By W. F. McCulloch

What Causes Magnetic Storms?

Not Sun-Spots but Gases Erupted from the Sun and Traveling to Earth at Times of Solar Turmoil, Sun-Spots May but Need Not Accompany This

By Henry Norris Russell

Tantalum--New Old Metal

Unsurpassed In Many Uses, Especially Chemical Equipment, Has Passivity of Glass, Strength of Steel, Hard Tools Made by Powder Metallurgy

By Philip H. Smith

What is Death?

Science May Know When it Learns What Life Is, No Surgeon Ever Brought a Dead Patient Back to Life, We Do Not Die All Over, All at Once

By Barclay Moon Newman

Marvels of the Night

Striking Natural Phenomena, The Aurora, Zodiacal Light, and Bizarre Types of Lunar Halos

By William Crowder

Foods X-Rayed

To Reveal Presence of Foreign Objects, Some Impurities, Also Condition of Products, Fruits, Fluoroscopic Inspection Widely Used

A Big Gun of Science

The Brasch and Lange Apparatus, Old-timer in Splitting the Atomic Nucleus, Faces a Revival with Improvements in Generating Artificial Lightning

By C. W. Sheppard

For Better Roads

Extensive Studies of Present Highways, Visibility, Grades, Curves, Traffic Quantity, Quality, Speed, Data Aid Future Planning

By Thomas H. MacDonald

Goethe Link Observatory

Built, With Its 36-Inch Telescope, by Amateur Astronomers of Indianapolis, Financed by Local Enlightenment, Presented to Science

By Victor E. Maier

Ghost Forests

Insects, Number One Forest Enemy, Make Ghosts of a Vast Number of Trees, Bark Beetle Heads the List, Other Insects, Man Combat the Pest

By Ruth Ringle

Indian Arrow Poison for Arthritis, Mental Disease, Enamels for Plastics, and more

By F. D. McHugh and Alexander Klemin

Departments

  • 50 Years Ago, June 1940

  • From the Editor

    Our Point of View, June 1940

  • Recommended

    Our Book Corner, June 1940

  • Departments

    Camera Angles, June 1940

  • Telescoptics, June 1940

  • Current Bulletin Briefs, June 1940

  • Legal High-Lights

  • Index to Vol. 162

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June 1940

See the World from a Different Perspective

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