So imagine you are at home, and you use the toilet a lot. After a while, the toilet can start to smell really bad, right? That's because of sewer gas. It's gas that comes from the pipes that take away the dirty water from the toilet.
Now, back in the old days, people didn't have indoor plumbing like we do now. They had outdoor toilets called "outhouses," and they used to have a big problem with sewer gas. It was really smelly and made people sick.
So, someone came up with an idea to get rid of the sewer gas. They invented something called a "sewer gas destructor lamp." It was a special kind of lamp that burned gas from the sewer pipes.
The lamp was made up of two parts: the burner and the chimney. The burner was like a little stove that burned the gas from the sewer pipes. The chimney was a tall, skinny pipe that took the smoke up into the air.
When the lamp was burning, it would suck in the bad smell from the toilet and burn it up. The fire would make the smell go away, and the chimney would take the smoke up into the air, so it didn't make people sick.
That's how the sewer gas destructor lamp worked. It was a way to get rid of the bad smell from the toilet and keep people healthy.