Businessman Burt Carpe and his scientist sidekick Jeff struggle with coming up with a plan to make money from their time machine. In the end, they take a large lump of carbon back to an unspecified ice age a few million years in the past. Can you guess why?
Michael Main
There she is, my cyclo-metronome, a real live time-machine!

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(1)
  1. “The Lodestone” by Joe Gill [?]:] and Ernie Bach, Unusual Tales #3 (Charlton Comics, April 1956).
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Joe Gill [uncredited]