caption: The image shows an old photo of a large machine inside of a building, with wooden planks, metal rods, and a wall in the background. The machine appears to be a millwheel, with a large wheel in the center and several smaller wheels on either side. The wheel is surrounded by a metal frame and has a handle on the top for easy maneuvering. The wall behind the machine is made of metal and has several windows, allowing natural light to enter the room.