N° 62 - janvier 1935  
Couverture de Frank R. Paul

The Hidden Colony [Part 1 of 3] • Otfrid von Hanstein; trans. by Fletcher Pratt • n.
The Prenatal Plagiarism • Mortimer Weisinger •
One-Way Tunnel • David H. Keller • nv
The Emotion Meter • W. Varick Nevins, III • ss
Master of the Genes • Edmond Hamilton • ss
Cosmic Joke • Leslie F. Stone • ss
Dawn to Dusk [Part 3 of 3; by Earl Binder & Otto Binder] • Eando Binder

N° 63 - fιvrier 1935  
Couverture de Frank R. Paul

The Robot Aliens [by Earl Binder & Otto Binder] • Eando Binder • nv
The Fatal Glance • Derwin Lesser • vi
The Truth Gas • Edmond Hamilton • ss
The Life Detour • David H. Keller • ss
The Hidden Colony [Part 2 of 3] • Otfrid von Hanstein

N° 64 - mars 1935  
Couverture de Frank R. Paul

In Caverns Below [Part 1 of 3] • Stanton A. Coblentz
The Eternal Cycle • Edmond Hamilton • ss
The Celestial Visitor • Lilith Lorraine • nv
Pigments Is Pigments • Mortimer Weisinger • ss
The Hidden Colony [Part 3 of 3] • Otfrid von Hanstein

N° 65 - avril 1935  
Couverture de Frank R. Paul

The Elixir of Progress • Philip J. Bartel • nv
Phantom Monsters • Joseph H. Kraus • ss
A Suitor by Proxy • Harry Collier • ss
The Insect World [*Eo, Reports to the Scientific Council] • Thos. S. Gardner • ss
The Missing Hours • Morton Brotman • ss
The Prophetic Voice • Laurence Manning • ss
In Caverns Below [Part 2 of 3] • Stanton A. Coblentz • n.

N° 66 - mai 1935  
Couverture de Frank R. Paul

The Waltz of Death [Part 1 of 3] • P. B. Maxon
Human Ants • J. Harvey Haggard • nv
The Moaning Lily • Emma Vanne • ss
The Living Machine • David H. Keller • ss
In Caverns Below [Part 3 of 3] • Stanton A. Coblentz • n.

Seeds from Space [*Stranger Club] • Laurence Manning • nv
Pygmalion's Spectacles • Stanley G. Weinbaum • 
The Mystery of the -/- • W. Varick Nevins, III • ss
Death from Within • Sterling S. Cramer • nv
The Waltz of Death [Part 2 of 3] • P. B. Maxon

N° 68 - juillet 1935
Couverture ?

The Green Man of Graypec [Part 1 of 3; *Kilsona] • Festus Pragnell • n.
Justice of the Atoms • Charles B. Pool • ss
The Memory Machine • Bernard Sachs • nv
A Thief in Time • Raymond A. Young • ss
The Waltz of Death [Part 3 of 3] • P. B. Maxon  

N° 69 - aoϋt 1935
Couverture ?

The Reign of the Reptiles • A. Connell • nv
The Worlds of If [*Van Manderpootz] • Stanley G. Weinbaum • ss
The Man With the Four Dimensional Eyes • Leslie F. Stone • ss
The Branches of Time • David R. Daniels • ss
The Green Man of Graypec [Part 2 of 3; *Kilsona] • Festus Pragnell • n.

N° 70 - septembre 1935
Couverture de Frank R. Paul

World of the Mist [Part 1 of 2] • Laurence Manning 
The Ideal [*Van Manderpootz] • Stanley G. Weinbaum • ss
One Hundred Generations • Philip Jacques Bartel
The Space Lens • Millard Verne Gordon • ss
The Green Man of Graypec [Part 3 of 3; *Kilsona] • Festus Pragnell •

N° 71 - octobre 1935  
Couverture de Frank R. Paul

The Perfect World [Part 1 of 3] • Benson Herbert • n.
The Cosmic Pantograph • Edmond Hamilton • ss
Martian Gesture • Alexander M. Phillips • nv
The Sex Serum • H. O. Dickinson • nv
World of the Mist [Part 2 of 2] • Laurence Manning • na

N° 72 - novembre, dιcembre 1935
Couverture de Frank R. Paul

Dream's End • A. Connell • ss
The Isle of Madness • Lilith Lorraine • nv
Red Moon • Kenneth Sterling • ss
Three from the Test-Tube • Raymond A. Palmer
The Rays from the Asteroid • R. D. Parkinson • 
The Perfect World [Part 2 of 3] • Benson Herbert • n

N° 74 - mars, avril 1936
Couverture de Frank R. Paul

The World of Singing Crystals [*Eo, Reports to the Scientific Council] • Thos. S. Gardner
The Cosmic Cocktail • Siegfried Wagener • ss
Earth's Lucky Day • Francis Flagg & Forrest J. Ackerman • ss
The Duplicate • A. Connell • ss
The Imperfect Guess • Philip Barshofsky • ss
Fate • Alan Conn • vi
Emotion Solution • Arthur K. Barnes • ss
Futility • Gerald H. Adams • ss
The Emotion Gas • George F. Gatter • ss
A World Unseen [Part 2 of 2] • Joseph Wm. Skidmore • na

N° 1 - 1950
Couverture ?

The Onslaught from Rigel • Fletcher Pratt • n
The Eternal Man • D. D. Sharp • nv
The Derelict of Space • William T. Thurmond & Ray Cummings • nv 
The Moon Devils • John Beynon Harris • ss 
The Age of Convenience • Simpson M. Ritter • ms
The Robot Aliens [by Earl Binder & Otto Binder] • Eando Binder • nv 
Exiles of Mars • Frank K. Kelly • nv

N° 2 - 1951
Couverture de Rudolph Belarsky

Turnabout [by Mortimer Weisinger] • Will Garth • 
Twice in Time • Manly Wade Wellman • n. 
The Last Hour • Alexander Samalman • ss 
The Chessboard of Mars • Eando Binder • nv 
The Alien Intelligence • Jack Williamson • na

N° 3 - 1952
Couverture d'Alex Schomburg

Guaranteed • E. Everett Evans • vi 
The Death of Iron • S. S. Held; trans. by Fletcher Pratt • n. 
Around Infinity • Oliver Saari • ss 
The Lanson Screen • Arthur Leo Zagat • ss 
Three Wise Men • Lloyd Arthur Eshbach • ss 
Earth-Venus 12 • Gabriel Wilson • ss 
The Brain Stealers of Mars [*Penton & Blake] • John W. Campbell, Jr. • 
The Invincible Midge • Paul Ernst

N° 4 - 1953
Couverture de Emsh

Gateway to Paradise • Jack Williamson • 
Christmas on Ganymede • Isaac Asimov 
Call Him Demon • Henry Kuttner • ss 
Find the Sculptor • Samuel Mines • ss 
Nothing Sirius • Fredric Brown • ss 
Jerry Is a Man • Robert A. Heinlein • ss 
The Irritated People • Ray Bradbury • ss