Invasion Communications

The Jobs of the Signal Corps are Many and Varied

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