Contents (view Concise Listing)

• The Undersea Tube • (1929) • short story by L. Taylor Hansen
• B. C. 30,000 • novelette by S. P. Meek (variant of B.C. 30,000 1932) [as by Capt. S. P. Meek]
• Old Shag • (1960) • short story by Bob Farnham
• In the Jag-Whiffing Service • (1959) • short story by David R. Bunch
• The Short Snorter • (1958) • short story by Charles Einstein
• The Rumble and the Roar • (1957) • short story by Stephen Bartholomew
• Shock Troop • (1956) • short story by Richard Bolton
• The Ethicators • (1955) • short story by Willard Marsh
• Lonesome Hearts • (1954) • short story by R. R. Winterbotham [as by Russ Winterbotham]
• Irresistible Weapon • (1953) • short story by H. B. Fyfe
• Welcome, Martians! • (1952) • short story by Evan Hunter [as by S. A. Lombino]
• Operation Distress • (1951) • short story by Lester del Rey
• Les Machines • (1954) • short story by Joe Love
• Transfer Point • (1950) • novelette by Anthony Boucher
• Micro-Man • (1947) • short story by Forrest J. Ackerman (variant of Micro Man 1946) [as by Weaver Wright]
• I'm Through! • essay by Henry Hasse (variant of I'm Through 1939) [as by Foo E. Onya]
• The Door Into Infinity • (1936) • novelette by Edmond Hamilton
• Am I Still There? • (1963) • short story by James R. Hall
• The Floating Island of Madness • (1933) • novelette by Jason Kirby
• The Feeling • (1961) • short story by Roger Dee
• Dawningsburgh • (1962) • short story by Wallace West