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A Two-Stacker Gold Dredge, The Tractor Behind the Lines, and more

Science- July 14, 1917

Aeronautical- July 14, 1917

Astronomy- July 14, 1917

A Sea Fight in the Adriatic

Destroying a Mine-field Under the Guns of the Enemy

By F. E. Kleinschmidt

Strategic Moves of the War, July 5th, 1917

By Our Military Expert

Doing Our Bit--II

Present Conditions and the Remedy

Pictured Physiology

How Study of the Human Mechanism Is Made Popular for Young Readers

A Business Shock Absorber

How the Commercial Economy Board of the Council of National Defense Is Teaching War Economies

By C. H. Claudy

Submarine Problem--VII

The Zig-Zag Course as a Defense Against Submarines

A Plague of Mice

Fish Refrigerating Plants for New found land

A Waste Product of the Rice Field Now Used in the Sugar Refinery, Coal Resources of Switzerland


  • Letters

    Correspondence- July 14, 1917

  • Recommended

    New Books, Etc.- July 14, 1917

  • Departments

    Inventions New and Interesting- July 14, 1917

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