Feature

New Sulfa Drug May Prevent as Well as Cure Meningitis

German Army Psychologists Make Effective Use of Science

Simple Drugs Are Often to Blame for Mental Ills

Scientists for Defense

Front Matter

Fortifications of Concrete Not Useless despite “Failure”

First Glances at New Books

In Science Fields

Fifth Columnist Mosquitoes Crushed by Malaria Fighters

Amusement Park Airplane Ride May Launch Big Aircraft

Electric Device Aids in Study of Herring

New Invention Will Detect Airplanes by Invisible Rays