780Af0203: "Trenches and control apparatus for maintaining constant elevation of water surface in compartments of trenches, Davis, California"
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This negative is of a photograph. Title information from "Seepage Losses from Irrigation Channels" by Carl Rohwer and Oscar Van Pelt Stout. See Figure 5. This experiment was located on the west side of the University Farm School campus (now known as the University of California, Davis).