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A Towing Barge for the Huge Naval Planes

Hurley and the Shipping Situation, The Humanity of Poison Gas and more

A 121-Mile Gun

Ordnance Officers of the United States Army Demonstrate Futility of Super-Range Guns

By J. Bernard Walker

Operating Room that Flies to the Battlefield

By F. Honor

England's Aircraft Industry

A Glimpse of Her Tremendous Achievement from Small Beginnings

By C. H. Claudy

The Chemical Foundation

A Semi-Official Corporation that Will Hold the Fort Against German Reinvasion of Our Chemical Industries

Return of the 17-Year Locust

What He is and How to Combat his Ravages

By W. H. Ballou
United States Chemical Warfare Service—I
The Sciences

United States Chemical Warfare Service—I

Building a Poison-Gas Plant With a Capacity of 200 Tons Per Day

World Markets for American Manufactures

A department devoted to the extension of American trade in foreign lands.

By Lynn W. Meekins

Measuring Visible and Invisible Light, Air Screens for Furnace Workers


  • Departments

    Correspondence - March 29, 1919

  • The Heavens in April, 1919

  • Inventions New and Interesting - March 29, 1919

  • Recently Patented Inventions - March 29, 1919

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The Essential Guide to the Modern World

The Essential Guide to the Modern World