Feature

In Science Fields

Rockets for Tomorrow’s Warfare

Airplanes Raise Question of How High Neutrality Goes

Bacteriology of Foods Extremely Important in War

New Instrument Aids in Making Airplanes Safe

Nature Ramblings: Treeline Stays Put

First Glances at New Books

Front Matter

Propaganda Protection Needed in the United States Today

[Photograph]: Test for High Flying

War Interrupts Natural Activities of Living

War Propaganda Success Depends upon Rousing Hate