119 – Acidproof

A panel from Superman #5, May 1940.
A panel from Superman #5, May 1940.

Superman #5 (May 1940) has our hero soliloquizing about his acid-proof costume that he invented himself, making him a scientific genius as well as a god-on-Earth, I guess. This will be retconned years later to be threads from his baby blanket from Krypton 🙂