#onThisDay in 1940 #LexLuthor debuted in @DC.com #Superman #comics #4 in #2Adventures 1st scheming to #blackmailTheWorld w an #EarthquakeMachine but bested by #TheManOfSteel & in the 2nd cause havoc w the nation’s #oilWells from a #glassDomedCity #risingFromTheOcean & inhabited by #prehistoricBeasts