Feature

Possible New Northern Light like Celestial Searchlight

U. S. Radium May Compete with Foreign Product

Indians Were Peaceable People Made Warlike by Whites

Hot Photocells Give Largest Currents

Mammoth Beryl Crystal Added to Famous Collection

More Food Value in Sweet than in Irish Potato

An American Romance in Steel and Steam

Front Matter

Margarin Made from Palm Oil Becomes Competitor of Butter

First Glances at New Books

Synchronized Broadcasting Successful in Six-Month Test

Spring-Built Molecule Models Simulate Vibration of Atoms