Feature

Front Matter

“Missing Link” Skulls Doubted

For a Place in the Sun

Solar System Rushing through Space

U. S. May Lose Cotton Supremacy

Diet Increases Tropical Disease

Summarizes Biological Literature

Rats Harbor Typhus

Sky Mappers of the Alaska Aerial Survey

New Baking Powder Leaves No Residue

Hinged Wing Marks Contest Airplane

Helium Heart’s Affinity