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Features

Erecting the Largest Steel Arch Bridge in Existence, The Second Pan-American Scientific Congress and more

How the War has Modified the Aeroplane

The Passing of the Military Monoplane, and Development of the Battle-Biplane

By Ladislas D*amp*apos;orcy

Strategic Moves of the War-August 25th, 1915

By Matthew E. Hanna

A Small Aero-Electric Plant

Making the Wind Generate Electric Current

By E. H. Williamson Jr.

Effect of the War on American Industries—I

Permanent Value to Manufacture on Our Soil with Our Native Raw Materials

By Edward Ewing Pratt

Where Wings are made for Fighting Men

How the War has Stimulated the Aeroplane Industry in this Country

By Frederick Eppelsheimer

Influence of the War on the Automobile Industry

What it was Expected to be, What it has been, and What it is Likely to be

By H. W. Perry

The Accuracy of Modem Rifles, Russian Naval Victory in the Baltic and more

By Edward C. Crossman

Mathematical Coincidences, Superposed Stereoscopic Pictures that Need no Stereoscope

By Alfred J. Lotka

The Loss of Two Great Physicians

By Paul Ehrlich

Tasks of German Inventors in Wartime

The Bee in Winter Time, Safety in Coal Mines and more

Cartridges for War

By Edward C. Crossman

Departments

  • Letters

    Correspondence - September 4, 1915

  • Departments

    The Heavens in September 1915

  • Recently Patented Inventions - September 4, 1915

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September 04, 1915Cover Image: How a Small Cannon Might Be Mounted on an Aeroplane

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