Vol 40, No 5. Contents: 5 • High Speed Pile • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 7 • Now You See It ... • [Foundation (Original Stories) • 7] • novella by Isaac Asimov 62 • The Helping Hand • short story by Burt MacFadyen 75 • In Times to Come (Astounding, January 1948) • [In Times to Come (Astounding)] • essay by The Editor 76 • Advent • [Advent • 1] • short story by William L. Bade 88 • The Analytical Laboratory: October 1947 (Astounding, January 1948) • [The Analytical Laboratory] • essay by The Editor 89 • Servomechanisms • essay by Lorne MacLaughlan 105 • Children of the Lens (Part 3 of 4) • [Lensman • 6] • serial by Edward E. Smith.