I love the instructions about improper use of an extension cord. Notice how socket B (presumably one of those surface-mount things with the triple-tap hooked into it) is being backfed via the cord that goes to socket A (the properly installed one).
Did you add the "Widowmaker" in red type?
Even back then, you had cowboys....
I love the design of the "Floor Outlet" with a metal screw in cover to protect the cord cap that is plugged into the recessed receptacle. It prevents the thing from getting yanked out accidentally or from dirt getting wedged in there.
Why did they discontinue that?
It seems like a good idea, especially for places like libraries where you don't want the reading table lamps getting unplugged.