The heads of the piles are sawn off, and a platform of timber or concrete rests on them.
A load of sawn or hewn timber contains 50 cub.
The vessel may be a flower-pot sawn in two, so that the halves may be bound together when used, or it may be a flower-pot or box with a side slit which will admit the shoot; this vessel is to be filled compactly with suitable porous earth, the opening at the slit being stopped by pieces of slate or tile.
A balk is a log hewn or sawn to a square section, and varying in size from I 1 to 18 in.
In all cases the bricks have been made, the stone quarried and dressed, the timber sawn, the iron cast, forged and wrought by the prisoners.