Feature

Hundred Flying Immigrants Return on Atlantic Clipper

Scientific “Torture” Tests Turbine Blades

Sulfur Aids Roads, Kills Germs, Covers Textiles

Nature Ramblings: Primal Slaughter

Russians Misunderstand Gene Theory They Attack

Synthetic Hormone Made Available to Public

First Glances at New Books

Front Matter

Glass Heated Cherry Red Can Be Plunged into Ice Water

France to Make Bid for Transatlantic Air Travel

Vitamins Outgrow ABCs; Thiamin Treats Neuritis

Sulfanilamide May Be Menace If Self-Administered