Invasion Communications
The Jobs of the Signal Corps are Many and Varied
Volume 169, Issue 2
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Features
Industrial Blasting
Technological Progress Reveals New Uses for Dynamite as Well as New Dynamites that are Safe, Controllable
Vest-Pocket Automobiles, Glue "Welding," and more
Galactic Gas Clouds
A Complex System of Enormous Rarefied Clouds of Gas Moving at High Velocity Has Been Discovered
Science Enters The Woods
Research Shows that Good Forestry Practice Can Provide a Permanent Pulp and Paper Supply
Elmer Sperry and His Magic Top
How an Inspired Inventor with an Ancient Toy Altered the World of Marine and Aerial Navigation
The Culprit Is Histamine
A Substance Normally in Our Body Cells Makes Trouble When it Escapes into the Blood Stream
Child Cancer, Whose Fault?
Cancer is Not Confined to Middle and Old Age; Nobody's—And Certainly Not the Mother's
Oil From Canadian Sands
Billions of Barrels of Oil, but Not for Lubrication, May be Drawn from Northeastern Alberta
Orphan Agar
But Poorly Known to the General Public, Agar is One of the Nation's Most Critical War Materials
Finest Wind Tunnel, Electrical Protection, and more
Plastic Adhesive and Cleaner, Wrinkle Finish, and more
Integral Supercharger, Post-War, and more
Pre-Flight Training
Economy of Both Time and Money are Achieved With Trainer that Gives Complete Illusion of Flight