Feature

Warns U. S. Is in Danger of Invasion by Epidemics

“Whiskers” Made Visible on Micro-Organisms

Fourth Comet of the Year Is Found by Harvard Man

Fitness for National Defense Stressed by Recreation Experts

In Science Fields

Clouds Prevent the Viewing of Sun’s Total Eclipse

Barro Colorado Island Now a Government Center

Kiwi, Bird That Supplies Aviation Nickname, Shown

Chemical Treatment of Glass Makes It More Transparent

[Photograph]: Science Service at the Fair

To Register 40,000 Indians and Eskimos for Draft

Nature Ramblings: Rooted Counsellors