Vol 26, No 5. Contents: 5 • Invention • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 9 • Sixth Column (Part 1 of 3) • serial by Robert A. Heinlein [as by Anson MacDonald] 42 • The Day We Celebrate • short story by Nelson S. Bond 54 • The Mechanical Mice • novelette by Maurice G. Hugi and Eric Frank Russell [as by Maurice G. Hugi] 73 • In Times to Come (Astounding, January 1941) • [In Times to Come (Astounding)] • essay by The Editor 73 • The Analytical Laboratory: November 1940 (Astounding, January 1941) • [The Analytical Laboratory] • essay by The Editor 74 • The Traitor • [Kilkenny Cats] • novelette by L. Ron Hubbard [as by Kurt von Rachen] 90 • Starting Point • essay by Norman R. Goldsmith 103 • Lost Rocket • short story by Manly Wade Wellman 115 • Book Review (Astounding, January 1941) • essay by John W. Campbell, Jr. 116 • The Opportunists • short story by E. A. Grosser 128 • Doom Ship • novelette by Harry Walton 155 •  Letter (Astounding, January 1941) • essay by Bill Stoy 155 • Brass Tacks (Astounding, January 1941) • [Brass Tacks] • essay by The Editor 155 •  Letter (Astounding, January 1941) • essay by Paul A. Carter [as by Paul Carter] 156 •  Letter (Astounding, January 1941) • essay by Ralph Williams (I) 157 • Science Discussions (Astounding, January 1941) • essay by The Editor 158 •  Letter (Astounding, January 1941) • [Letters: Isaac Asimov] • essay by Isaac Asimov 160 • Dead—and Embalmed • essay by John W. Campbell, Jr. [as by Arthur McCann]. 【 PREVIOUS ISSUE ← January 1941 → NEXT ISSUE 】