Feature

Radium-like Substances Produced Inexpensively

Protein Migrations May Aid in Diagnosis

Only by Continuous Effort Can Disorder Be Prevented

Nature Ramblings: Sizes of Seeds

Defense Requires Knowledge, Organized and Implemented

First Glances at New Books

Fish Carry Own Lights in Under-Ocean Blackout

[Photograph]: Fights Aerial Invasion

First Glances at New Books

Front Matter

Need American Efficiency in Planning for Defense

Army, Navy Take Part in Defense Research