Feature

Scientists to Identify Unprofitable Lands

New U. S. Submarine’s Hull Joined Together by Welding

Tanks Fight Fires in California Woods

First Glances at New Books

Front Matter

Fast-Moving Positive Particles Produce New Kind of X-Rays

Exposition Visitors Examined for New Racial Type

Blast Furnace Gets Phosphorus Cheaply from Tennessee Rock

Fish Spins on Tail over Sea Surface

Unpredictable Human Factor Attacked by Psychologists

[Photograph]: Roaring Northeaster

Thyroid Removal Gives Relief to Heart Disease Sufferers