Astounding Stories, May, 1931

W. M. CLAYTON, Publisher HARRY BATES, Editor DR. DOUGLAS M. DOLD, Consulting Editor The Clayton Standard on a Magazine Guarantees That the stories therein are clean, interesting, vivid, by leading writers of the day and purchased under conditions approved by the Authors' League of America; That such magazines are manufactured in Union shops by American workmen; That each newsdealer and agent is insured a fair profit; That an intelligent censorship guards their advertising pages. The other Clayton magazines are : ACE-HIGH MAGAZINE, RANCH ROMANCES, COWBOY STORIES, CLUES, FIVE-NOVELS MONTHLY, ALL STAR DETECTIVE STORIES, RANGELAND LOVE STORY MAGAZINE, WESTERN ADVENTURES, and WESTERN LOVE STORIES. More than Two Million Copies Required to Supply the Monthly Demand for Clayton Magazines. VOL. VI, No. 2 CONTENTS May, 1931 COVER DESIGN H. W. WESSO Painted in Water-Colors from a Scene in "Dark Moon. " DARK MOON CHARLES W. DIFFIN 148 Mysterious, Dark, Out of the Unknown Deep Comes a New Satellite to Lure Three Courageous Earthlings on to Strange Adventure. ( A Complete Novelette. ) WHEN CAVERNS YAWNED CAPTAIN S. P. MEEK 198 Only Dr. Bird's Super-Scientific Sleuthing Stands in the Way of Ivan Sarnoff's Latest Attempt at Wholesale Destruction. THE EXILE OF TIME RAY CUMMINGS 216 Young Lovers of Three Eras Are Swept down the Torrent of the Sinister Cripple Tugh's Frightful Vengeance. (Part Two of a Four-Part Novel.) WHEN THE MOON TURNED GREEN HAL K. WELLS 241 Outside His Laboratory Bruce Dixon Finds a World of Living Dead Men—and Above, in the Sky, Shines a Weird Green Moon. THE DEATH-CLOUD NAT SCHACHNER AND ARTHUR L. ZAGAT 256 The Epic Exploit of One Who Worked in the Dark and Alone, Behind the Enemy Lines, in the Great Last War. THE READERS' CORNER ALL OF US 276 A Meeting Place for Readers of Astounding Stories. Single Copies, 20 Cents (In Canada, 25 Cents) Yearly Subscription, $2.00 Issued monthly by Readers' Guild, Inc., 80 Lafayette Street, New York, N. Y. W. M. Clayton, President; Francis P. Pace, Secretary. Entered as second-class matter December 7, 1929, at the Post Office at New York, N. Y., under Act of March 3, 1879. Title registered as a Trade Mark in the U. S. Patent Office. Member Newsstand Group. For advertising rates address The Newsstand Group, Inc., 80 Lafayette St., New York or The Wrigley Bldg., Chicago. Behind them a red ship was falling—falling free! Dark Moon A COMPLETE NOVELETTE…