Analog Science Fiction / Science Fact, August 1969 (Vol. LXXXIII, No. 6) edited by John W. Campbell, with cover art by Kelly Freas and interior illustrations by N. Blakely, Vincent Di Fate, Peter Skirka, and Leo Summers. Fiction and non-fiction contents include: The Teacher, a novelette by Colin Kapp; The Timesweepers, a novelette by Keith Laumer; All Fall Down, a novelette by John T. Phillifent; Androtomy and the Scion, a novelette by Jack Wodhams; Pressure, a short story by Harry Harrison; Womb to Tomb, a short story by Joseph Wesley; Minds and Molecules, a science fact article by Carl A. Larson; Chemistry... AD 1819, a science fact article by John W. Campbell; and How to End All Crime, an editorial by John W. Campbell. Regular features include: The Analytical Laboratory; In Times to Come; The Reference Library, with book reviews by P. Schuyler Miller; and Brass Tacks, with letters from the readers.