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Features

Building the Quebec Bridge, The Liberty Motor, and more

Second Attempt to Raise the 640-Foot Suspension Span into Position, Successful

Electricity- September 29, 1917

Science- September 29, 1917

The Submarine Problem --XVI

Protection, Internal to the Ship, Against the Torpedo

Ideas that will not Work

The Council of National Defense Must Keep an Open Mind, in Spite of Thousands of These
[article on military ideas that are useless]

By C. H. Claudy

Touring Plants

Curious Devices Which They Employ for Spreading from Place to Place

By S. Leonard Bastin

A National Asset in East Tennessee

By F. M. McClenahan

Departments

  • Letters

    Correspondence- September 29, 1917

  • Departments

    Invention- September 29, 1917

  • The Heavens in October, 1917

  • Inventions New and Interesting- September 29, 1917

  • Recently Patented Inventions- September 29, 1917

  • An Electric Furnace for Melting Brass

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September 29, 1917Cover Image: Camouflage robes worn by the crew of a French anti-aircraft cannon (see page 225)

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