Feature

Four Types of Brain Wave Formed during Sleep

Confusion of Causes Hampers Treatment of Mental Ills

[Photograph]: Collared for His Own Good

Second Male Sex Hormone Will Soon Be Synthesized

In Science Fields

Fish That Bite Men

Airplane Propeller Makes World’s Noisiest Roar

Stratosphere Balloonists to Seek Sun’s Neutrons

New Stratosphere Flight to Be Made in October

High Temperatures Calculated for Radio Roof of World

Thin Aluminum Foil Highly Efficient as Heat Insulator

Chemist Sees Eventual Profit in Gold from Sea Water