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Disarmament and Pacifism, The Technique of Road Repairing and more

The Hudson River Caissons

Giant Shafts from Which the Vehicular Tunnel Will be Built and Later Ventilated

By Robert G. Skerrett

Behind the Exhibits

Departments and Activities of a Museum Which the Layman Never Sees

By Albert A. Hopkins

The Science of Athletics

What is it that Distinguishes the Star from the Mediocre Performer?

By Charles W. Paddock

High Pressure Steam

A New Departure in Power and Heating Plant Engineering By Our Berlin Correspondent

Making Lenses in America

How the Electrically Heated Melting Pot is Putting us on a Par with Germany

Fighting the Water Hyacinth

Clearing the Clogged Waterways of Louisiana and Florida by Means of Live Steam

By Thomas Ewing Dabney


  • Departments

    Correspondence, Oct. 1921

  • Inventions New and Interesting

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