Chapter 4
On its edges men were
digging, and filling buckets with the finer earth and gravel, which
was carried to a machine made like a baby's cradle, open at the
foot, and at the head a plate of sheet-iron or zinc, punctured full
of holes. On this metallic plate was emptied the earth, and water
was then poured on it from buckets, while one man shook the cradle
with violent rocking by a handle. On the bottom were nailed cleats
of wood.