Jesse Shirleys Bone Mill was opened in 1857 and closed in 1972
The building has sunk 6 feet. due to subsidence from coal mining since it was constructed.
The mill opened with a second hand walking beam steam engine built in 1820. This engine operated the mill until it closed.
This is a shot of the Princess's walking beam. The flywheel is 4 ton and is turned at 20 rpm by 20 lbs of steam pressure coming from a boiler in the next room.
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