Contents: The Silver Lining / essay by The Editor (i.e. John W. Campbell Jr.) The Weapon Makers, Part 1 of 3 (Weapon Shops of Isher #) / A.E. van Vogt; interior artwork by Frank Kramer In Times to Come / essay by unknown Flight into Darkness / Webb Marlowe (i.e. J. Francis McComas); interior artwork by Frank Kramer Mimsy Were the Borogoves / Lewis Padgett (i.e. Henry Kuttner and C.L. Moore); interior artwork by Kolliker The Man in the Moon / Henry A. Norton; interior artwork by Kolliker God's Footstool / essay by Malcolm Jameson The Analytical Laboratory: December 1942 / essay by The Editor (i.e. John W. Campbell Jr.) Blue Ice (Probability Zero series) / Henry Kuttner Probability Zero! / essay by L. Sprague de Camp and Fox B. Holden and Colin Keith and Henry Kuttner Efficiency (Probability Zero series) / Colin Keith (i.e. Malcolm Jameson) Noise is Beautiful! (Probability Zero series) / Fox B. Holden The Anecdote of the Movable Ears (Probability Zero series) / L. Sprague de Camp Brass Tacks / essay by The Editor (i.e. John W. Campbell Jr.) Opposites—React!, Part 2 of 2 (Seetee serial) / Willi Stewart (i.e. Jack Williamson); interior artwork by Kolliker