Volume 147, Issue 4
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Features
Ultra-Violet Light and Forgery
Avalanches and Avalanche Protection
Things that Happen in Sunspots
America Emerges from Partial Maritime Eclipse
Flying in the Beginning, October 1932
In a Rifle Factory
Over 2500 Operations Are Required to Produce Accurate Rifles That Stand the Test of Use
Factory Punishment for Tires
Physical Laboratories of the Stars
Profiting by Enforced Leisure
Hoover Dam
Materials, Supplies, Manpower, and Program of Future Work
The Liner that Can not Roll
A 'Postoffice' for Freight
Houses of the Future
May Be Made in Factories But Will Be Built to Individual Design
Salmon Fishing
Brings Millions of Dollars Yearly to the Pacific Coast. How the Salmon Are Caught and Canned