February 1938
Cover art by Leo Morey
- Greta, Queen of Queens • W. K. Sonnemann • novella
- Spawn of the Ray • Maurice Duclos • short story
- Time—Eternal • J. Chapman Miske • poem
- Zagribud [Part 2 of 3; Elnek Jelfel] • John Russell Fearn • novel
- Mr. Bowen's Wife Reduces • Miles J. Breuer • short story
- Exiles from the Universe • Stanton A. Coblentz • short story
April 1938
Cover art by Leo Morey
- The Music-Monsters [Professor Jameson] • Neil R. Jones • novella
- Zagribud [Part 3 of 3; Elnek Jelfel] • John Russell Fearn • novel
- Daughter of Luna [different from the story of the same name in the August 1937 issue] • J. Lewis Burtt • short story
- Annus Mirabilis • Edward Carlisle • novella
June 1938
Cover art by Horace Hime
- The Man Who Ruled the World • Robert Moore Williams • novelette
- Escape Through Space • Ross Rocklynne • short story
- The Master of Golden City • Polton Cross • novelette
- The Vanishing Diamonds [Professor Stilwell] • Charles R. Tanner • short story
- A Summons from Mars • John Russell Fearn • novelette
- The Space Pirate • Eando Binder • novelette
- The Invisible Bomber • Lieut. John Pease • short story
August 1938
Cover art by Henry F. Kroeger, Jr.
- Secret of the Observatory • Robert Bloch • novelette
- Time for Sale • Ralph Milne Farley • short story
- The Blinding Ray • A. R. Steber • novelette
- The Meteor Monsters • Arthur R. Tofte • novelette
- Germs of Death • A. H. Vance • short story
- Kidnappers of Space • Thorp McClusky • novelette
- Outlaw of Space • Wallace Quitman • short story
October 1938
Cover art by Robert Fuqua
- The Gland Superman [Harley Gale] • Ed Earl Repp • novelette
- The Atom Smasher • Gordon A. Giles • short story
- Horror's Head • Lieut. John Pease • novelette
- Locked City • Thornton Ayre • novelette
- The Flying Dutchman of Space • Frederic Arnold Kummer • short story
- Artificial Hell • Harvey Emerson • short story
- Revolution of 1950 [Part 1 of 2] • Stanley G. Weinbaum • novella
November 1938
Cover art by Robert Fuqua
- Ray of Eternity • Richard Tooker • novelette
- Song of Death • Ed Earl Repp • short story
- Monstrosity of Evolution [Peters & Ethredge] • Thorp McClusky • novelette
- Revolution of 1950 [Part 2 of 2] • Stanley G. Weinbaum • novella
- The Man Who Lived Twice • Edmond Hamilton • short story
- Pirates of Eros • Frederic Arnold Kummer • short story
- The Secret of the Ring • Thornton Ayre • novelette
December 1938
Cover art by Robert Fuqua
- Ghost of Mars [Don Hargeaves] • Festus Pragnell • novelette
- Master of Telepathy • Eando Binder • novelette (© Copyright Renewed: details pending.)
- Purge of the Deaf • A. R. Tofte & L. A. Schmidt • short story
- Prince Deru Returns • Harl Vincent • novelette
- Patrolman E6 Gets His Man • Benson Herbert • novelette
- Kiss of Death • Neil R. Jones • novelette
- Polar Prison • Raymond A. Palmer • short story