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True and False Anti-Submarine Strategy, Work for the Cripple to Do, and more

Exploring the Burrows of the German Army

Elaborate and Well Furnished Subterranean Dwellings
[bunkers and dugouts on the Western Front]

American Supremacy of the Air

The Problem of the Air Craft Production Board

By C. H. Claudy

Strategic Moves of the War--June 21st, 1917

By Our Military Expert
[Russian revolution, Macedonia, Ypres]

Recent Chemical Developments- June 30, 1917

Grinding Wheels

By Ellwood Hendrick

What I Can Do for My Country

VI. The Civil Engineer

The Submarine Problem--V.

Some Points in the U-boat Campaign

By Percival A. Hislam


  • Departments

    The Heavens in July, 1917

  • Inventions New and Interesting- June 30, 1917

  • Index- June 30, 1917

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