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Harnessing Nature?, The Society for Electrical Development and more

Achievements of Military Aircraft

Lessons Taught by the European Maneuvers and by the Tripolitan and Balkan Campaigns

By H. Bannerman-Phillips

Harnessing the Public Water Power

Progress in the Development of Our Natural Resources

By C. J. Blanchard

Suspension Insulators Suitable for 110,000-volt Transmission

Tests Showing the Weaknesses of Standard Types

By Joseph B. Baker

The Destruction of the German Dirigible "L. Z. 15."

By Carl Dienstbach

Fighting the Chestnut Bark Disease

The State of Pennsylvania's Work

The Recent Storms and Floods

A Remarkable Series of Cataclysms

Notes for Inventors, Legal Notes and more

Latent Pressure in Rock Strata, The Problem of the World's Oil Supply and more


  • Letters

    Correspondence - April 5, 1913

  • Departments

    Inventions New and Interesting - April 5, 1913

  • Recently Patented Inventions - April 5, 1913

  • Notes and Queries - April 5, 1913

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