Feature

Christmas Eve Nova Discovered at Harvard

Air Fighters Should Tank up on Oxygen before Ascents

War Brings Renewed Danger of Invasions by Insect Foes

First Glances at New Books

Volume Information

Front Matter

Call to Action Sounded for All Men of Science

[Photograph]: Earth’s Magnetic Field Duplicated

Protection of Civilians Is Paramount Duty of Science

[Photograph]: Diatoms Test Lens Quality

Low Cost “Atom Sifter” Sorts Atoms by Their Weight

[Photograph]: Detect Radioactivity