Feature

Thumb-Tip Test Devised to Detect Nerve Injury

Modified Blackouts Suggested by Electrical Engineer

New Mental Ill Forecast; It Is “Radio Fatigue”

Absence of Uniforms Seen as Preventing Neuroses

Rubberless Wheels Are Not Considered Generally Practical

Fumigant Kills Insects in Stored Grain and Flour

Nature Ramblings: Shoreline Victory

Building up Machine Parts Can Save Much Metal for War

Magnesium Extracted from Dolomitic Limestone

New Machines and Gadgets

First Glances at New Books

Front Matter