Rock Mill The final ball mill in the Chain O’ Mines concentrator. Behind it was a bucket of steel balls. Similar Images ...based on the tags: gears, machinery, mills, orange, pipes, rivets... Water at the bottom of the silo was perfectly clear. I really like the porcelain guides for the silk threads, probably used because they could be polished for perfect, persistent, smoothness. A flooded assembly line. The gulls wait to eat the next load of spilled grain. Arista 100. These monorails were on a side line to build smaller parts of the Ranger before being attached to the truck itself. Note in the upper right that there’s another conveyor above this section. Note the tiled floor between the bucket conveyors and an old mill. Installed in 1904 at the center of the plant, this is one of two batteries of boilers. Being in Oshkosh, heat was very important to keeping labor moving in the cold months. Rivets are sexy, and this old machine has more than a fair share. Looking toward downtown, one is reminded that when Stahlmann built here in 1855 that it was on the very edge of the city.