Part of a hydraulic engine. "A device for separating sand and other heavy particles from running water. F. cast-iron body; B. cover; A. finely perforated diaphragm; D. induction-port for water; E, valve. (Water enters through D, and the sand is collected in C.) G. plug for clearing out sand." —Whitney, 1889

Sand Trap

Part of a hydraulic engine. "A device for separating sand and other heavy particles from running water.…