Contents: 5 • Denatured Atoms • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 7 • Cold Front • novelette by Hal Clement 46 • In Times to Come (Astounding, July 1946) • [In Times to Come (Astounding)] • essay by The Editor 47 • Rain Check • short story by Henry Kuttner and C. L. Moore [as by Lewis Padgett] 60 • Trouble • novelette by George O. Smith 84 • The Blindness • novelette by R. S. Richardson [as by Philip Latham] 99 • Visitor from Beyond • essay by uncredited 101 • Portrait of a Voice • essay by John R. Pierce [as by J. J. Coupling] 122 • The Analytical Laboratory: April 1946 (Astounding, July 1946) • [The Analytical Laboratory] • essay by The Editor 130 • Stability • short story by A. Bertram Chandler 148 • Film Library • novelette by A. E. van Vogt 167 • Brass Tacks (Astounding, July 1946) • [Brass Tacks] • essay by The Editor 169 •  Letter (Astounding, July 1946) • [Letters: Willy Ley] • essay by Willy Ley 172 •  Letter (Astounding, July 1946) • essay by R. S. Richardson [as by Robert S. Richardson] 172 •  Letter (Astounding, July 1946) • essay by Selden G. Thomas [as by S. G. Thomas] 174 •  Letter (Astounding, July 1946) • essay by George O. Smith