Both of my parents were from, what is now known as, the “iron bound” section. I remember it as being called “down neck”. I grew up in 50s & 60s, not far away from Newark, in a highly industrial town called Linden, where the sun rose over Exxon (back then it was called Esso), and set over Merck.
Back then, you could tell which way the wind was blowing from the smell in the air. If the wind was from the east you smelled Exxon’s refinery, from the south, it was General Aniline (organic solvents), from the southwest it was Teneco (coffee), from the west Merck, and from the North, no distinct smell, which we though of as being fresh air.
We used to get freshly baked bread smell in Newark at the time of day when we should be heading home for dinner. It was one of those big bread companies. Reveals how far ahead they make the next day’s bread!