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Features

Railroad Accidents and How They Work, Our Attitude Toward the Port and Harbor Plan and more

By Ralph Howard

The Electric Battleship

Features of the U. S. S. Tennessee Designed from First to Last for Electric Drive

Canada's Superpower Zone

What Ontario Has Done in Hydroelectric Development

By Robert G. Skerrett

Relativity and a Rotating Disk

An Application of Einstein's Theory that Has Caused Much Misunderstanding

By Leigh Page

Watermarking Hand-Made Papers

Some of the Details of This Obscure Art, as Practiced in Ancient and Modern Times

By Dard Hunter

Putting Rejected Oranges to Work

How California Fruit Growers Are Utilizing Their Citrus By-Products

By Arthur L. Dahl

With the Engineers of Industry

A Department Devoted to the Physical Problems of the Plant Executive

Departments

  • Departments

    Correspondence

  • Inventions New and Interesting

  • Recently Patented Inventions

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March 1921

Think Outside the Gift Box