The height of the water column in this case is approximately 125 feet, which will exert a lifting force of nearly 50 pounds per square inch, which is a very powerful lifting force. Also, one which can be opened at will, when the pump is full. Also, one which can be opened at will, when the pump is full. This mechanism has one disadvantage. There are no bearings on east top of Wainscote.
Edge is seven-tenths of an inch higher than lowest point of bearing on west wall.
This design keeps round shaft snugly in place, and keeps end play friction at a minimum. This drawing is whopper-jawed for the purpose of illustration. When the float rises, the round cedar shaft rolls on the track. This rolling movement tightens the rope which in turn raises the slabs. The up and down movement of the float, activates the pulley mechanism, and causes the cedar shaft of roll back and forth on the track.