STOLEN BRAINS by CAPTAIN S. P. MEEK
Dr. Bird, Scientific Sleuth Extraordinary, Goes After a Sinister Stealer of Brains.
THE INVISIBLE DEATH by VICTOR ROUSSEAU
With Night-Rays and Darkness-Antidote America Strikes Back, at the Terrific and Destructive Invisible Empire. (A Complete Novelette.)
PRISONERS ON THE ELECTRON by ROBERT H. LEITFRED
Fate Throws Two Young Earthians into Desperate Conflict with the Primeval Monsters of an Electron's Savage Jungles.
JETTA OF THE LOWLANDS by RAY CUMMINGS
Into Remote Lowlands, in an Invisible Flyer, Go Grant and Jetta—Prisoners of a Scientific Depth Bandit. (Part Two of a Three-Part Novel.)
AN EXTRA MAN by JACKSON GEE
Sealed and Vigilantly Guarded Was "Drayle's Invention, 1932"—for It Was a Scientific Achievement Beyond Which Man Dared Not Go.