The 1920's New Yorker was glutted with full-page advertisements from The Pittsburgh Press. These advertisements were meant to prove...errr...something, and took the strangest logical detours in order to prove...errr...whatever it was they were proving.
I give you this baby. He looks like he's saying "Hey, screw you, lady!"
Why all this Pittsburgh-boosting? Why the babies? "Why is the man pounding the table?" We may never know.