Analog: September 1964 ("Bedsheet" size issue: 8-1/2" by 11".)
Illustrations by John Schoenherr, Kelly Freas. Cover by John Schoenherr (for "A Case of Identity.") This is one of my favorite covers by Schoenherr: in a Vermeer-like study, note the bunsen burner and the phone on the wall…

Science: "The Risk-Takers" by Carolyn Meyer.

Novelette: "A Case of Identity" by Randall Garrett (First in the "Lord Darcy / Sean O'Lochlainn" series - a world where Magic got the attention to detail and development that Science got in ours...)

Stories: "The Machmen" by James H. Schmitz (a "Hub" story)
"Sheol" by Piers Anthony & H. James Hotaling.

Serial: "Sleeping Planet" (Conclusion) by William R. Burkett, Jr.

John W. Campbell's editorial is "A Counterblaste to Tobacco." Book reviews by P. Schuyler Miller.