Looking up to the second floor of the Nitrating House, where cotton would be soaked in nitric acid. These brought cotton into the building.
The individual ovens are skinny to allow even and fast heating of the whole interior. Numbers are cut into signs because no paint could withstand the heat or corrosive emissions from the coking process.
The newer tunnels were fitted with these fluorescent lights, although some skylights (block glass embedded in skywalks) let in some natural light during the day.
A hole in one of the boards casts the inverse image of a tree outside across a peeling sanatorium wall.
The new steel door of the diesel car shops, built in 1948 and used through the 1960s, as seen from the service pit. On the top of the photograph you can see the exhaust vent.
Miners would sit in this room before going into the mine. The boards on the right indicated whether every single miner was “in” or “out”.
One of the hundreds of wells across the depot, as seen through an open rail door. In the distance, the radome.
A scrapped steam turbine, perhaps. In the background you can see a gutted casing for another turbine.