Feature

Cave Man Lover

Intricate Mathematical Brain Solves New Physics Problem

In Science Fields

Ionosphere Rays Possible as New Name for Cosmic Rays

New Communication System Discovered in Animal Body

New Steel-Making Materials Aid U. S. Defense Plans

Eddington Reveals Details of His Theory of the Electron

First Glances at New Books

Front Matter

Compression of Hydrogen May Cut Guess at Sun’s Age

Height of Shooting Stars Measured with Wire Frame

New Chapters in American History