Astounding Science Fiction September 1951 (Volume 48, Number 2)
Illustrations by Paul Orban, Hubert Rogers, Schneeman, Welker. Cover by Hubert Rogers (for "Day of the Moron.")

Novelettes: "Day of the Moron" by H. Beam Piper
"Untitled Story" by Frank M. Robinson
"The Universe Between" by Alan E. Nourse (formed part of The Universe Between).

Story: "Brick Wall" by J. A. Meyer.

Science: "No Green Cheese" by Daniel Whitton;
"Meteorite Craters" by Willy Ley

John W. Campbell's editorial is "Note for Chemists"; Book reviews by P. Schuyler Miller.