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Smoothing the Bore of a Hoover Dam Tunnel

Flying in the Beginning

By General William Mitchell and Hugh D. Wise

The Peregrinations of a Freight Car

By Francis X. Milholland

New Planetary Discoveries

By Henry Norris Russell

The Muscular Power of Insects

By S. F. Aaron

A Masterpiece of Museum-Craft

Radio in the Forest Service

New Transmitter-Receivers, One Weighing Only Ten Pounds, Are to be Thoroughly Tested This Year

By A. Gael Simson

Solo Man--A New Fossil Skull

By William F. F. Oppenoorth

New Notes on Ancient Man

By Albert G. Ingalls

Tropical Fish as Pets

Food for a Floating Hotel

The Supplies for an Ocean Liner's Next Trip Are Ordered While 1000 Miles at Sea

By Albert A. Hopkins

Whirling Molten Steel to Make Gun Castings

By Steven L. Conner

Treasure Trove in Lowly 'Sweeps'

Building Safety into Automobile Glass

By Byron C. Foy

Quartz Takes up Fire Fighting

By Grace Lockhart


  • Departments

    Across the Editor's Desk, September 1932

  • Back of Frontispiece, September 1932

  • Our Point of View, September 1932

  • Youthful Maturity, Colored Newspapers in Siam and more

  • Advertising as a Curb on Product Design Pirates, Patent Assignment Rights Defined and more

  • Books Selected by the Editors, September 1932

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