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Preparedness for Peace

By F. D. McHugh

Automobiles for 1931 in Review

Refining Pluto's Orbit

By Henry Norris Russell

A Watch-Dog for the Carbureter

ON THE afternoon of December 3, last, Captain Frank Hawks arrived in Memphis, Tennessee, after a fast flight from New York in an airplane equipped with the Motovita which is described in the accompanying article...

Engineering Aspects of Michelson's Velocity-of-Light Experiment

By Edgar C. Nichols

The "Mystery Ship" Revealed

The Fastest Commercial Plane Yet Flown, It Has Out-Performed the Best Planes of the Army and Navy

The Baby of Them All

Bridging the Kill Van Kull

By John F. Galvin

More Evidence of the "Folsom Culture" Race

By Harold J. Cook

The Life and Death Rate of Cars

By R. W. Riis

From Sugar Cane to Crystal Cube

By Albert A. Hopkins

Vacationing Awheel

By A. P. Peck

The Broom in Industry

By Edwin P. Norwood

The Diesel on the Highway

Solving a 3400 Year Old Egyptian Enigma

The Aristocrats of Motordom

Books Selected by the Editors


  • Departments

    Across the Editor's Desk, February 1931

  • Back of Frontispiece, February 1931

  • Concentrated "Poison" for Aircraft

  • Our Point of View, February 1931

  • Teach Deaf and Dumb Children with Gas, Wire Cable Static Absorber and more

  • Radio Tube Patent Held Valid, Plant Patent Aid Provided and more

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