ACTION COMICS (1938) #41

“THE SABOTAGE RING.” Superman follows up leads in a case involving the sabotage of the Gargan Factory by plotters bent on causing widespread destruction! Superman: Clark and Lois are about to tour the Gargan Factory when Clark’s X-ray vision spots a bomb hidden under the floor. Slipping away to change to Superman, he returns to remove the bomb. Due to the level of security at the factory, Clark deduces it must have been an inside job, so after seeing which workers were absent that day, he and Sergeant Casey visit each of them.…