Black and white lantern slide of the masonry walls of the Yen Chow Fu spillway.

Black and white lantern slide of the Yen Chow Fu spillway. A low brick wall separates spillways and a small building sits to the right of the frame.

Black and white lantern slide of two men standing at the bank of the Yellow River near a gauging station.

Black and white lantern slide of two men with a silt pump. One man holds a bucket under the pump spout.

Black and white lantern slide of six people aboard a small boat, reading the meter of a water gauge in the Yellow River.

Black and white lantern slide of seven people aboard a small boat, reading the meter of a water gauge in the Yellow River.

Black and white lantern slide of a line of laborers pushing heavily laden wheelbarrows along a dirt road atop a dike in China.

Black and white lantern slide of a line of laborers pushing heavily laden wheelbarrows along a dirt road atop a dike in China.

Black and white lantern slide of a breakwater structure near a canal lock at Wei Hu, China.

Black and white lantern slide of a man standing next to a windlass, or winch, with a bucket attached.

Black and white lantern slide of a wagon train traveling through a dirt path cut between two steep hillsides.

Black and white lantern slide of a wagon train traveling through a dirt path cut between two steep hillsides.