Long is the List
Coal, a Plentiful Raw Material, Fills Many Needs of War and Peace
Volume 168, Issue 5
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Features
Electrical Progress, Cold Conquest, and more
Engineers Work for Present, Plan for Future
A Hobby Goes to War
Scientific American's Amateur Telescope Makers Find Their Peacetime Optical Skills are a Wartime Asset
The Betatron
World's Most Powerful X-Ray Machine Holds Vast Possibilities for Medicine, Industry, Research
Color and Heat, T V Archeology
Nature's Cross-Word Puzzles
Typical Examples of a Kind of Indoor Sport Indulged in by a Few Astrophysical Fans: Simple Arithmetic
Who Were Our Ancestors?
The Strange Tale of an Ancient Skull that Baffled a Committee of Experts Appointed to Investigate it
What About Vitamin Tablets?
What Can Science Say Today about the Desirability of Taking Supplementary Vitamins? Is it Good or Bad?
Ideal Weights, Menace
A Little Hunger May Improve the Nation's Health
Testing for Victory
Industrial Safety in All its Phases is the Direct Concern of a Unique Non-Profit Organization
Ants, Visual Purple, and more
New Mexico Ants Help Man Mine Garnets
Grinders, Sander, and more
In Portable Form, For High-Speed Production
When Engineers Meet
Aeronautical Experts Contract a Sort of Mental Indigestion that is Good for the Whole Country
Engine Production
Speeded by Assembly-Line Methods