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Time and the Railroad Dispatcher

By Francis X. Milholland

Carl Akeley's Africa

Which Shall Inherit the Earth--Man or the Insects?

By L. O. Howard

A $35,000,000 Business Home

Worlds From a Catastrophe

By Henry Norris Russell

Hydro-Electric Power in the Ozarks

By A. J. Seaburg

To Stop Soil Erosion Losses

Meeting the Emergencies of a Great City

By Albert A. Hopkins

The Big Noise Behind the 'Mike'

The Earth Beneath

By Ernest A. Hodgson

Staying the Hand of Time

By Milton Wright

And Now, It's Seaweed

Kelp from the Pacific Coast May Supply Elements Which Are Now Lacking in Our Diet

By Helen R. Crane and Emory W. Thurston

Progress and the Telephone

By F. D. McHugh

A Book-Print Reader for the Blind

By Robert E. Naumburg

Blasting Roads to Settle Them

Asquith and Kitchener

A Biographical Study of Two Eminent Englishmen

By W. D. Puleston


  • Departments

    Across the Editor's Desk, August 1931

  • Back of Frontispiece, August 1931

  • Correct Time is Essential to Safe Railroading

  • Our Point of View, August 1931

  • Marine Electrolysis Eliminator, Pointers on Nail Points and more

  • Langmuir Patent Invalid, Chemical Patents and more

  • Books Selected by the Editors, August 1931

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