"Just discovered...," he says! I'll bet he just discovered something after smoking that hookah you see to the right in the panel. Don't tell me that's supposed to be some sort of scientific instrument that helped him discover his "secret science" of time travel. Come on! I am a child of the sixties, people! I know a hookah when I see one. I'm betting just off panel there's a big ol' plate of Elizabethan potato chips. Dick Sprang and Charles Paris provide this image from the BATMAN story in DETECTIVE COMICS # 220, of all places.