1mouth, lies open; the bottom is covered with a plate of
iron, a palm thick
and two palms and as many digits wide, each end of which is wedged into the
timber with broad wedges, and the front and back part of it are fixed to the
timber with iron nails. To the sides of the mortar above the block are fixed
two upright posts, whose upper ends are somewhat cut back and are mor
tised to the timbers of the building. Two and a half feet above the mortar
and two palms and as many digits wide, each end of which is wedged into the
timber with broad wedges, and the front and back part of it are fixed to the
timber with iron nails. To the sides of the mortar above the block are fixed
two upright posts, whose upper ends are somewhat cut back and are mor
tised to the timbers of the building. Two and a half feet above the mortar