Vol 21, No 5. Contents: 6 • Voyage 13 • short story by Ray Cummings 20 • The Secret of the Canali • short story by Clifton B. Kruse 31 • Beyond That Limit—? • essay by uncredited 32 • Rule 18 • novelette by Clifford D. Simak 52 • Good Old Brig! • [Pvt. Kelton] • short story by Kent Casey 63 • Language for Time Travelers • essay by L. Sprague de Camp 73 • Contest • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 74 • The Men and the Mirror • [Colbie & Deverel] • novelette by Ross Rocklynne 99 • The Analytical Laboratory: May 1938 (Astounding, July 1938) • [The Analytical Laboratory] • essay by uncredited 99 • In Times to Come (Astounding, July 1938) • [In Times to Come (Astounding)] • essay by uncredited 100 • The Dangerous Dimension • short story by L. Ron Hubbard 113 • Giant Stars • essay by John W. Campbell, Jr. [as by Arthur McCann] 118 • The Legion of Time (Part 3 of 3) • [Legion of Time] • serial by Jack Williamson 140 • Hotel Cosmos • short story by Raymond Z. Gallun 152 • Relativity in Metallurgy • essay by uncredited 153 • Science Discussions and Brass Tacks (Astounding, July 1938) • [Brass Tacks] • essay by The Editor 153 • Letters. 【 PREVIOUS ISSUE ← July 1938 → NEXT ISSUE 】