Feature

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

Hypnosis Urged for Speed-up Treatment of War Neurosis

Average Person Can Give Blood Every Three Months

[Photograph]: New Wind Tunnel