Contents (view Concise Listing)

• 8 • John Carter and the Giant of Mars • [Barsoom] • (1941) • novella by Edgar Rice Burroughs
• 44 • The Invisible Wheel of Death • (1941) • novelette by Don Wilcox
• 70 • Scientific Mysteries: The Pyramid of Gizeh • [Scientific Mysteries] • (1941) • essay by Joseph J. Millard
• 72 • Mystery Moon • (1941) • novelette by Edmond Hamilton
• 108 • The Armageddon of Johann Schmidt • (1941) • short story by Arthur T. Harris
• 118 • Hammer of the Gods • (1941) • short story by David Wright O'Brien [as by John York Cabot]
• 124 • Skidmore's Strange Experiment • (1941) • short story by David Wright O'Brien
• 129 • Meet the Authors: Don Wilcox • (1941) • essay by Don Wilcox
• 144 • A City on Venus • (1941) • essay by unknown [as by Henry Gade]
• 8 • Battering Rams of Space • [Lester Allison] • (1941) • novella by Don Wilcox
• 54 • Scientific Mysteries: How Long Has the Earth to Live? • (1941) • essay by Morrison Colladay
• 56 • The Last Analysis • (1941) • short story by David Wright O'Brien [as by John York Cabot]
• 61 • An Anesthesia 2300 Years Old • (1941) • essay by Simpson M. Ritter
• 62 • Adam Link in the Past • [Adam Link] • (1941) • novella by Otto Binder [as by Eando Binder]
• 98 • The Accidental Murders • (1941) • short story by Robert Moore Williams
• 108 • The Stillwell Degravitator • (1941) • short story by Charles R. Tanner
• 120 • The Winking Lights of Mars • (1941) • short story by Otto Binder [as by Gordon A. Giles]
• 127 • Ultimate Reality • (1941) • essay by Morrison Colladay
• 129 • Meet the Authors: Charles R. Tanner • (1941) • essay by Charles R. Tanner
• 144 • A City on Jupiter • (1941) • essay by unknown [as by Henry Gade]
• 8 • The City of Mummies • [Barsoom] • (1941) • novella by Edgar Rice Burroughs
• 44 • Scientific Mysteries: Life from Electricity • (1941) • essay by Jack West
• 46 • The Man Who Lived Next Week • (1941) • novelette by David Wright O'Brien
• 68 • Murder in the Past • (1941) • short story by David Wright O'Brien [as by John York Cabot]
• 76 • Hok and the Gift of Heaven • [Hok] • (1941) • novelette by Manly Wade Wellman
• 96 • Phoney Meteor • (1941) • novelette by John Wyndham (variant of Meteor) [as by John Beynon]
• 114 • The Lost Colony—A Strange Civilization in the Heart of the Superstition Mountains • (1941) • short story by James Norman
• 124 • Mystery of the Amazing Battery • (1941) • short story by Albert Bernstein [as by Donald Bern]
• 130 • Chicago Invaded—By the Men from Mars! • essay by Anonymous
• 133 • Meet the Authors: James Norman • (1941) • essay by James Norman
• 144 • A City on Neptune • (1941) • essay by unknown [as by Henry Gade]