Feature

New Machines and Gadgets

Safer Rough-Water Hulls Promised for Flying Ships

Check Polio-Induced Limp

Air Travel Made Safer by Central Weather Service

In Science Fields

Ammonium Nitrate Safe When Properly Handled

Front Matter

Automatic Electric Device Makes Own Wind Record

Fish Bite When Hungry

Elasticity of Plane Wings

Find Way to Keep Powders Suspended in Liquids

Halt Spread of Infection