6″ Boiler Lagging -3, and back to the Dredger Engine.
The brass bands which secure the wooden lagging strips were installed. 5 bands were required to make sure that every piece of wood is held once the glue lets go. The bands are only 4.75mm wide. The bolts which apply the tension pass through small brass blocks which are silver soldered onto the ends of the strips. (thanks Ben De Gabriel of EJ Winter for that tip! And for the band material!)
And back to the Trevithick Dredger Engine….