780Fs0301: "Tile on section of template board ready for pouring concrete plug in bottom."
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Title information from "Improving the Distribution of Water to Farmers by Use of the Parshall Measuring Flume" by Ralph L. Parshall. See Figure 16. Tile used as stilling well for Parshall flume. Caption further reads, "Hole in tile for Ha inlet tube. The tip of 45-caliber cartridge shell shows at the right of the upright tile. The four nails, in adjacent space, may also serve as a means of holding the lower end of the guide rod at the center of the plug. The top cross block, 1 1/2 inches wide, supports the top end of the guide rod. The details of this block may be noted at the right end of the ...