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Features

Repairing a Buckled Ship, Tinfoil in Condensers and more

Binder Twine from the Desert

How a Use Has Been Found for an Utterly Useless Plant

By John L. Von Blon

The Freedom of the Skies

Some of the Problems That Will Have to be Solved as the Human Race Takes to the Air

By Alexander McAdie

The First Round-Trip Trans-Atlantic Airship

Further Details of the R-34 and Its Return Flight from Long Island to the British Isles

Why Hawker Failed, Getting Away from Getting Under and more

By James L. Breese

Keeping the Big Guns at the Front Effective

The Mobile Repair Shops of the U. S. Army Ordnance Department

By Herbert T. Wade

Mechanical Equipment of the Farm

Latest Developments in Agricultural Machinery and Practical Suggestions for the Farmer

By Harry C. Ramsower

A Naval Land Gun that Can Fire from the Track at a Moment's Notice

By C. L. McCrea

Does Plate Glass Fade? How do Rats Carry Eggs?

Departments

  • Departments

    Correspondence - July 26, 1919

  • Inventions New and Interesting - July 26, 1919

  • Recently Patented Inventions - July 26, 1919

  • New Books, Etc. - July 26, 1919

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July 26, 1919

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