The Atom.

"Ivy University professor and scientist Ray Palmer discovers a mysterious meteorite giving him the ability to shrink his body to microscopic size! Fashioning a uniform from fibers taken from the meteorite, Dr. Palmer learned to control not only his size but also his mass, emerging as a mighty champion of justice and enemy of all evil -- as the hero called the Atom! Now an experienced crime-fighter, the Tiny Titan defends Ivy Town against the villainy of such foes as Chronos the Time-Bandit, the Thinker, the Panther, the Bug-Eyed Bandit and many others"--P. [4] of cover.