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

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

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