Volume 125, Issue 4
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Features
Aeronautics, Science, Industrial Efficiency
Pulling the Mississippi's Teeth
What Is Being Done by Way of Making Our Longest River Navigable
The Temple Driver--a Powder Gun which has no Recoil, Concussion or Flash
Molybdenum Steel in the Motor Car
Reducing Weight in High-Power Cars by the Use of New Steel Alloys
Succeeding in Architecture
Opportunities Awaiting the Young Man in This Field, Especially in the Immediate Future
What Makes the Glow-Worm Glow?
What Recent Investigations Reveal in the Matter of the Luminous Organs of Various Insects and Sea Life
Reporting the Life Story of Rails
How Railroads Employ the Rail-Section Machine for Determining the Wear and Tear on Their Tracks
From German Munition Boxes to Workmen's Houses, What is the Aurora Borealis? and more
Our Floating Hospital
Some Features of the United States Navy Hospital Ship "Relief" Built Specifically for Hospital Purposes