Feature

New Invention Just Patented Makes Scene Visible by Heat

No Danger of Shortage in World’s Quinine Supply

Erratum: In Science Fields: Protein Molecules Seen with Electron Microscope

National Security Lessons from Human Physiology

Volume Information

Discovery Gives Promise of Dental Decay Prevention

[Photograph]: Continental Drift

Holiday Comet

Front Matter

Million-Volt X-Ray Unit Dedicated at G.E.Anniversary

First Glances at New Books

Earth’s Core May Be Solid, with Hydrogen Dissolved