Grippers Robotic pincers to move molten rods of glass between machines. Similar Images ...based on the tags: black&white, bokeh, machinery... 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. The chapel (left) and surgical suite (straight on) move in an out of view as fog rolls up from the St. Louis River valley. On the upper floors where the sunlight is yellow–the color of flour dust, once exposed to the elements. There are 700 of these storage bunkers. Their design was to funnel explosions upward, rather than toward other buildings, to minimize secondary explosions. The power pulley that ran air compressors straight off of the steam plant’s axel. Looking toward a void–formerly a hallway to the mineshaft–now a hole in the ground. A steel powder keg serves as a door prop on the static-proof wood core floor. Note the ‘XXX’ marking to the left of the double door. The last tailings on a broken conveyor belt. A heavy steel rail door to help funnel explosions upward, rather than outward.