Vol 12, No 4 Contents: 2 • Land of the Lost (Part 1 of 2) • serial by Charles Willard Diffin 29 • The Machine That Knew Too Much • short story by A. T. Locke 39 • Agitation! • essay by uncredited 40 • The Invading Blood Stream • novelette by Paul Starr 56 • Some Ghosts Explained • essay by uncredited 57 • The Purple Brain • short story by Hal K. Wells 70 • Ancestral Voices • short story by Nat Schachner 83 • Stratosphere Planes • essay by uncredited 84 • Last Sacrifice • short story by J. Gibson Taylor, Jr. 97 • Vampire Bats • essay by uncredited 98 • Farewell to Earth • [A Race Through Time • 2] • novelette by Donald Wandrei 116 • Terror Out of Time • novelette by Jack Williamson 131 • The Demon of the Flower • short story by Clark Ashton Smith 139 • Brass Tacks (Astounding Stories, December 1933) • [Brass Tacks] • essay by The Editors 140 •  Letter (Astounding, December 1933) • essay by Donald Wandrei 141 •  Letter (Astounding, December 1933) • essay by Nat Schachner 141 •  Letter (Astounding, December 1933) • essay by Julius Schwartz 142 •  Letter (Astounding, December 1933) • essay by Lester Anderson 143 •  Letter (Astounding, December 1933) • [Letters: Forrest J. Ackerman] • essay by Forrest J. Ackerman 143 •  Letter (Astounding, December 1933) • essay by William S. Sykora 144 •  Letter (Astounding, December 1933) • essay by Ross Rocklynne [as by Paul Cahendon]. 【 PREVIOUS ISSUE ← December 1933 → NEXT ISSUE 】