The U. S. battleship “Ohio” in the east chamber of the Pedro Miguel
Locks. On the left is seen the electric locomotive used in drawing
vessels through.]
[Illustration: LADDER DREDGE, PANAMA CANAL]
[Illustration: SUCTION DREDGE, PANAMA CANAL
The upper view shows a ladder dredge, which operates by means of buckets
on a continuous chain, dipping the contents of the buckets into the scow
which lies alongside. The lower view shows a suction dredge, which
operates on soft mud or sands, pumping the discharge through the pipe
seen at the left of the illustration. The pipe may be carried to any
desired point and used for filling.]
[Illustration: _Copyright, C. H. Graves Co._