stour

"I consider the lodging-shops more injurious to the health of the miners than their work itself. So many sleeping in the same room, so many breaths so much stour arising from their working clothes, so much perspiration from the men themselves, it is impossible to be comfortable."

I have no idea what this word could mean. Does it relate to smell or wetness?

Stour - dirt, dust - in this case, coal-dust.