ASTOUNDING SCIENCE FICTION OCTOBER 1951

Volume 48 Number 2

Serial

Iceworld (Part One of Three Parts) by Hal Clement

Novelette

Thinking Machine by H. B. Fyfe

Short Stories

“The Years Draw Nigh” by Lester Del Ray

Ulthima Thule by Eric Frank Russell

The Head Hunters by Ralph Williams

Article

These Rare Earths by William Olcott

Reader’s Departments

The Editor’s Page

The Analytical Library

In Times to Come

The Reference Library by P. Schuyler Miller

Brass Tacks

Cover by Richard Van Dongen

Illustrations by Edd Cartier, Paul Orban, and Richard Van Dongen