These bars rest on the cross-heads y, whose pins p act on the bearing boxes of the pressure rolls.
If any of the valve-stems should become loose in the cross-heads they may screw themselves either in or out.
There is art in alliterative headlines and startling “cross-heads.”
It has been superseded in our day, by improved piston guides and cross-heads, the construction of which in Pg.
The engine had two vertical cylinders and worked the propelling gear with cross-heads and connecting-rods.