Number 1 edit
April 1935 IA
Cover art by Leo Morey
- The Mosquito Army • H. M. Crimp • novelette
- How Inventions Are Born • Bob Olsen • poem
- The Sunlight Master • E. J. Van Name • novelette
- Earth Rehabilitators, Consolidated [Part 2 of 2] • Henry J. Kostkos • novella
- The Martian Mail • J. Lewis Burtt • novelette
- Relativity to the Rescue • J. Harvey Haggard • novella
Number 2 edit
May 1935 IA
Cover art by Leo Morey
- The White City • David H. Keller • novelette
- Liners of Time [Part 1 of 4; Elnek Jelfel] • John Russell Fearn • novel
- Older Than Methuselah • Stanton A. Coblentz • novelette
- A Saga of Posi and Nega [Posi & Nega] • Joseph Wm. Skidmore • novelette
- The Gipsies of Thos • R. Frederick Hester • novelette
Number 3 edit
June 1935 IA
Cover art by Leo Morey
- Liners of Time [Part 2 of 4; Elnek Jelfel] • John Russell Fearn • novel
- Moon of Arcturus • Richard Tooker • novelette
- The Inner World [Part 1 of 3] • A. Hyatt Verrill • novella
- An Astounding Announcement • A. L. Hodges • vignette
- Six-Legged Gangsters • Bob Olsen • novelette
- 170 Miles a Minute • Ward Skeen • short story
- The Phytic Empire • Derald S. Walker • short story
Number 4 edit
July 1935 IA
Cover art by Leo Morey
- Space War [Professor Jameson] • Neil R. Jones • novelette
- Liners of Time [Part 3 of 4; Elnek Jelfel] • John Russell Fearn • novel
- The People of the Arrow • P. Schuyler Miller • short story
- Parasite • Harl Vincent • novella
- The Inner World [Part 2 of 3] • A. Hyatt Verrill • novella
- The Weather Master • Arthur Cave • short story
Number 5 edit
August 1935 IA
Cover art by Leo Morey
- The Kingdom of Thought • L. A. Eshbach • novella
- The Music of the Spheres • S. J. Byrne • short story
- The Golden Planetoid • Stanton A. Coblentz • novelette
- Evolution • M. G. Lathrop • poem
- The Inner World [Part 3 of 3] • A. Hyatt Verrill • novella
- The Never-Dying Light • J. Lewis Burtt • novelette
- Liners of Time [Part 4 of 4; Elnek Jelfel] • John Russell Fearn • novel
Number 6 edit
October 1935 IA
Cover art by Leo Morey
- A Legend of Posi and Nega [Posi & Nega] • Joseph Wm. Skidmore • novelette
- Another Dimension [Bell & Pearson] • George H. Scheer • novella
- The Chemistry Murder Case • Miles J. Breuer • short story
- Landscapes of Luna • Bob Olsen • poem
- The Inner Domain • Phil Collas • novelette
- Escape from Ceres • Clara E. Chesnutt • short story
- World Gone Mad • Nat Schachner • short story
Number 7 edit
December 1935 IA
Cover art by Leo Morey
- The Meteor Miners • L. A. Eshbach • short story
- The Fall of Mercury • Leslie F. Stone • novella
- Draught of Immortality • A. W. Bernal • novelette
- The Symphony of Death • Raymond A. Palmer • novelette
- Restitution • John Francis Kalland • novelette
Number 8 edit
February 1936 IA
Cover art by Leo Morey
- The Lurking Death • Dr. Walter Rose • short story
- The Maelstrom of Atlantis [Part 1 of 2] • Joseph Wm. Skidmore • novella
- Stroheim • James Brooke • short story
- We of the Sun • Henry J. Kostkos • short story
- When the Top Wobbled • Victor A. Endersby • novella
- Hoffman's Widow • Floyd Oles • short story
- "21931" • J. E. Keith • novelette
Number 9 edit
April 1936 IA
Cover art by Leo Morey
- Intelligence Undying • Edmond Hamilton • short story
- A Modern Comedy of Science • Isaac R. Nathanson • novelette
- The Maelstrom of Atlantis [Part 2 of 2] • Joseph Wm. Skidmore • novella
- "Labyrinth" [Professor Jameson] • Neil R. Jones • novelette
- The Pygmies of Phobos • Ralph Robin • short story
- The Airwayman • Logan Carlisle • short story
Number 10 edit
June 1936 IA
Cover art by Leo Morey
- Beyond the Stratosphere [Part 1 of 2] • William Lemkin • novella
- The Isle of Juvenescence • Bob Olsen • novella
- When the Meteor Struck • J. Lewis Burtt • short story
- Science and the Saucepans • Julia Boynton Green • poem
- Luvium Under the Sand [Luvium] • A. R. McKenzie • novella
- The Sword of Akalah • J. Leslie Chamberlain • short story
Number 11 edit
August 1936 IA
Cover art by Leo Morey
- He Who Shrank • Henry Hasse • novella
- Subconscious • John Russell Fearn • novella
- Mr. Dimmitt Seeks Redress • Miles J. Breuer • short story
- Beyond the Stratosphere [Part 2 of 2] • William Lemkin • novella
Number 12 edit
October 1936 IA
Cover art by Leo Morey
- Uncertainty [Part 1 of 2] • John W. Campbell • novella
- The Council of Drones • W. K. Sonnemann • novelette
- Six Who Were Masked • Henry J. Kostkos • short story
- The Human Pets of Mars • Leslie F. Stone • novella
- The Outpost on Ceres • L. A. Eshbach • novelette
Number 13 edit
December 1936 (transcription project)
Cover art by Leo Morey
- Uncertainty [Part 2 of 2] • John W. Campbell • novella
- The Time Control • Philip Jacques Bartel • short story
- The Space Marines and the Slavers [Capt. Brink] • Bob Olsen • novelette
- Devolution • Edmond Hamilton • short story
- Death Creeps the Moon • Wede • novelette
- When the Earth Stood Still • Arlyn H. Vance • novelette