Hot Metal Trench The working end of the blast furnace, where molten metal would flow like lava out of the furnace… a process called ‘tapping’. Related Similar Images ...based on the tags: circles, cranes, ditches, furnaces, graffiti, machinery, pipes... A retrofitted dust collector stands out from the geometry of the roofline. A dead belt-o-vator. The top floor of the Dominion Elevator. Acros 100 on 120. A long exposure of the side of the coke ovens, lit by the nearby streetlights. Without a roof, the bricks were being washed away in the later years of the roundhouse. The mill is one of the tallest buildings in the city. It’s too bad that the cupola with its big skylights and flagpole were removed. Inside the MLK High School chemistry laboratory. I did not take the escape ladder to the surface, but I am told it pops up in the middle of a hill next to the missile silo doors. I really like the porcelain guides for the silk threads, probably used because they could be polished for perfect, persistent, smoothness.