Table of Contents

In this Issue


The Elementary Particles of Matter
by Carl D. Anderson
A report on what man already knows—and what he is finding out—about the ultimate nature of matter

by Pol Duwez
It's an old metal, but now that it's been discovered by the engineers its future looks bright

Science in Art: New Discoveries of the Middle Ages
by Earnest C. Watson

The Month at Caltech

Research in Progress: The Electric Analog Computer


Alumni News