Trommel The first step of the filtering process is being spun through this tube. Similar Images ...based on the tags: cables, circles, dirty, machinery, pipes, rusty, staircases, trommels, tubes... Looking up to the second floor of the Nitrating House, where cotton would be soaked in nitric acid. These brought cotton into the building. Stained windows and sheet metal catch the sunset from across the Ohio River. A line of huge machines wait to be used as parts under a long-disused belt drive. Looking up at the LEMP malting plant elevator. Look at that BRICKWORK! Looking down the kiln line from atop the furnaces. It seems someone planned on stealing the fridge, but gave up on the second floor. The underground portions of the engine shop were mostly filled in. The roof compromised, rain water rolls down the main stairway. This wheel scoops the washings from the sluice room and places it on the tailings conveyor.