Contents: 5 • Stunted Seedling • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 7 • Ex Machina • [Gallegher (Henry Kuttner)] • novelette by Henry Kuttner [as by Lewis Padgett] 36 • The House Dutiful • short story by William Tenn 53 • He Walked Around the Horses • [Paratime Police] • novelette by H. Beam Piper 71 • New Wings • short story by A. Bertram Chandler 87 • The Analytical Laboratory: January 1948 (Astounding, April 1948) • [The Analytical Laboratory] • essay by The Editor 88 • Man on Mira • essay by R. S. Richardson 101 • Brass Tacks (Astounding, April 1948) • [Brass Tacks] • essay by The Editor 101 •  Letter (Astounding, April 1948) • essay by Willis E. McNelly 106 •  Letter (Astounding, April 1948) • essay by Dale Tarr 107 •  Letter (Astounding, April 1948) • essay by Terry Jeeves [as by B. T. Jeeves] 110 • In Times to Come (Astounding, April 1948) • [In Times to Come (Astounding)] • essay by The Editor 111 • ... And Searching Mind (Part 2 of 3) • [Humanoids] • serial by Jack Williamson (book publication as The Humanoids 1949)