Atom 2, August-September 1962, pages 8  and 10
© National Periodical Publications (DC Comics) 

Editor: Julius Schwartz

Cover

Penciler: Gil Kane
Inker: Murphy Anderson
Colorist: unknown
Letterer: unknown

"The Oddest Man on Earth" and "The Prisoners Who Vanished

Script:  Gardner Fox
Penciler: Gil Kane
Inker: Murphy Anderson
Colorist: unknown
Letterer: unknown

The story "The Prisoners Who Vanished " in the second issue of the Silver Age Atom's own comic book features the return of one of his first foes, Carl Ballard from Showcase 34.  Ballard has rediscovered the secret, stolen from alien Kulan Dar, of using Europium for teleportation.  He is again using this power to carry out crimes, with members of his gang mysteriously disappearing from prison.  Not surprisingly, Ballard is again defeated by the Atom.  At the end of the story, it is revealed that Ballard himself is allergic to Europium – surely an unusual allergy – and cannot use it to teleport himself!

For more information on the Silver Age Atom and Europium, please go to Showcase 34.