. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Bui. 854, U. S. Dept. of Agriculture. Plate P. R. 0-623 Fig. I.—Changing the Grade of the Flume. Note 12-inch plank laid along top of flume for men to work on while changing grade. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.

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