Volume 124, Issue 13
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Features
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
Relativity and a Rotating Disk
An Application of Einstein's Theory that Has Caused Much Misunderstanding
Watermarking Hand-Made Papers
Some of the Details of This Obscure Art, as Practiced in Ancient and Modern Times
Putting Rejected Oranges to Work
How California Fruit Growers Are Utilizing Their Citrus By-Products
With the Engineers of Industry
A Department Devoted to the Physical Problems of the Plant Executive