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Features

Reaping the Whirlwind, The Natural Time Unit in the Organic World and more

How Mexican Rebels Destroy Railways and Bridges

By G. F Weeks

The Military Value of Low Flying, The Two-speed Rear Axle and more

By C. Dienstbach

Opening of the World's Greatest Power Plant

Damming the Mississippi River to Produce 300,000 Hydro-electric Horse-power.

An Encyclopaedia on the Card-index System, Military Aviation in Italy and more

By Our Berlin Correspondent

The Current Supplement - September 13, 1913

The Industrial Need of Technically Trained Men.--VII

The Possibilities That Await the Hydraulic Engineer

By Chester W. Larner

Departments

  • Departments

    Inventions New and Interesting - September 13, 1913

  • Recently Patented Inventions - September 13, 1913

  • Notes and Queries - September 13, 1913

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September 13, 1913

Think Outside the Gift Box