Feature

Develops Instrument for Measuring National Morale

Psychoanalysts to Diagnose World’s Destructive Urge

Smoother Railroad Rides Seen Possible with New Invention

Nature Ramblings: What Is a Worm?

Two-Party Political System Prescribed for AMA

First Glances at New Books

Telephone for Use while Wearing Gas Mask Patented

Automatic Chlorinator Makes Drinking Water Safe

First Glances at New Books

Front Matter

Plague Epidemic Is Possible for U.S. under War Stress

[Photograph]: Airway “Light Buoys”