Analog Science Fiction - Science Fact August 1969 (Volume 83, Number 6)
Illustrations by N. Blakely, Vincent Di Fate, Peter Skirka, Leo R. Summers. Cover by Kelly Freas (for "The Teacher.")

Novelettes: "The Teacher" by Colin Kapp
"The Timesweepers" by Keith Laumer
"All Fall Down" by John T. Phillifent (a.k.a. "John Rackham")
"Antrotomy and the Scion" by Jack Wodhams.

Stories: "Pressure" by Harry Harrison
"Womb to Tomb" by Joseph Wesley.

Science: "Minds and Molecules" by Carl A. Larsen
"Chemistry... A.D. 1819."

John W. Campbell's editorial is "How to End All Crime"; Book reviews by P. Schuyler Miller.