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A Bomber Type Frequently Seen Over London

Milk Made More Digestible

Homogenization Eliminates Separation of Cream

By Barclay Moon Newman

Acid Bogey, Poliomyelitis, and more

We Do Not Eat Too Many Acid Foods

Insulation Test, Shellac Fortifier, and more

"Mechanical Finger" Nail Checks Wire Insulation

Our Search for the Supernatural

Scientific American Launches an Investigation of the Reality of Psychic Phenomena

Warbird Doctors

Planes Alone Don't Make an Airforce; It Takes Trained Men to Keep Fighting Pilots in the Air

By James L. H. Peck

Sealed, Brobdingnagian, and more

Swelling Rubber Retards Tank Leakage

Inside the White Dwarf Stars

How an "Absurdity" Became a Discovery, Revealing a New State of Matter

By Henry Norris Russell

Our Next Source of Oil

Petroleum Geologists are Turning from the Structural Trap to the Stratigraphic Trap

By Randall Wright

Lost Ring, "Fossil Lightning," and more

Physicist Squeezes Ring Out of Copper

Evolution in the Future

Where is Our Human Species Headed? Will Man Pull Himself Together and Go Ahead?

By Henry M. Lewis Jr.

Electricity Catches Trout

Science of Fisheries Research is Aided by Data Obtained With New Electric Shocker

By Duck Dormin

Frozen Food Pack, Wattage, and more

For Liquids, Vegetables, Fruits, Solids


  • 50 Years Ago, April 1941

  • From the Editor

    Our Point of View, April 1941

  • Browsing with the Editor, April 1941

  • Recommended

    Our Book Corner, April 1941

  • Departments

    Personalities in Industry, April 1941

  • Industrial Trends, April 1941

  • Camera Angles, April 1941

  • Your Firearms and Fishing Tackle, April 1941

  • Telescoptics, April 1941

  • Current Bulletin Briefs, April 1941

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