Feature

New White Paint Developed during War

Seeds and Insects to Be Tested in Atomic Blast

Nature Ramblings: Fish Can Drown

Germany’s Progress in Use of Magnesium Alloys

Amateurs Plan to See South American Eclipse

Peruvian City Was Largest Ancient Center

Radioactive “Tracers”

Front Matter

In Science Fields

Spine Trouble May Cause Heart Disease Symptoms

Background of Atomic Bomb

Valuable Chlorine from Sulfur and Common Salt