Vol 21, No 2. Contents: 4 • In Times to Come (Astounding, April 1938) • [In Times to Come (Astounding)] • essay by The Editor 6 • Three Thousand Years! (Part 1 of 3) • serial by Thomas Calvert McClary (book publication as Three Thousand Years 1954) 27 • Matter Is Conserved • short story by Raymond A. Palmer 38 • Of the 500 Known Elements • essay by uncredited 39 • Hyperpilosity • short story by L. Sprague de Camp (variant of Hyperpelosity) 48 • Negative Space • novelette by Nat Schachner 78 • The Faithful • short story by Lester del Rey 85 • Detail—But Immensely Important to Engineering • essay by John W. Campbell, Jr. [as by uncredited] 86 • Iszt—Earthman • novelette by Raymond Z. Gallun 116 • Radiation in Uniform • essay by Herbert C. McKay 125 • Democracy • [Editorial (Astounding)] • essay by The Editor 126 • Jason Sows Again (Part 2 of 2) • serial by Arthur J. Burks 149 • Ignition Point • essay by John W. Campbell, Jr. [as by Arthur McCann] 151 • Science Discussions and Brass Tacks (Astounding, April 1938) • [Brass Tacks] • essay by The Editor 151 • Letters. First edition here. 【 PREVIOUS ISSUE ← April 1938 → NEXT ISSUE 】