Table of Contents

The Planets by Harold C. Urey
Electrolytic Manganese and its Alloys by Reginald S. Dean


Smog Research Pays Off
A progress report on the Los Angeles war on smog, which reveals that, with the help of scientific research, we are at last actually making progress.
by A. J. Haagen-Smit

High Compression Engines
They're providing real gains in power as well as in specific fuel consumption —but there's still a joker in this game.
by Peter Kyropoulos

The Engineering Crisis
—and what you can do about it
by John R. Weir

The 1952 Economy Run
by Bill Wright '51

Campus News:

Faculty Portrait: Robert P. Sharp

The Month at Caltech

Alumni News