Slaves by Joseph Freeman

Again the grinding of the iron gods,
The old familiar fury of the wheels;
Again the accustomed clamor of the rods,
The giddy belting, and the room that reels;
The dim light dancing, and the shadows shaking,
The little sudden pains, the mute despairs,
The patient and the weary hands; till, waking,
At dusk, we tumble down the crazy stairs.

http://en.wikipedia.org/wiki/Joseph_Freeman_(writer)