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38 x 48 cm. Relief shown by hachures and spot heights. "Atlas sheet no. 53(C)." "Issued May 7th 1877." "1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army." Prime meridians: Greenwich and Washington, D.C. Includes sectional diagram that shows how atlas sheets fit together. "Weyss, Herman & Lang, del." "Louis Nell, J. J. Young, topographical assistants." "Under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." "Expeditions of 1873 and 1876 under the command of 1st. Lieutenant William L. Marshall, Corps of Engineers, U. S. Army, 1st Lieutenant Eric Bergland, Corps of Engineers, U. S. Army, Executive Officers and field astronomers." "By order of the honorable the Secretary of War." Original publisher: Graphic Co. photo., Scale: 1 inch to 4 miles or 1:253440.

38 x 49 cm. Relief shown by hachures and spot heights. "Atlas sheet no. 61(D)." "Issued Jan. 10th 1878." "Expeditions of 1873, 74, 75 & 76 under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army." Prime meridians: Washington, D.C. and Greenwich. Includes sectional diagram showing how atlas sheets fit together. "Weyss, Lang & Herman, del." "By order of the honorable the Secretary of War." "Under the direction of Brig. General A. A. Hunphreys, Chief of Engineers, U. S. Army." " J. C. Spiller, Louis Nell, topographical assistants." "Expeditions of 1873, 74, 75 & 76 under the command of 1st. Lieutenant William L. Marshall, Corps of Engineers, U. S. Army, 1st Lieutenant Eric Bergland, Corps of Engineers, U. S. Army, Executive Officers and field astronomers." Original publisher: U.S. Geographical Surveys West of the 100th Meridian, Scale 1 inch to 4 miles or 1:253440.

Report on flood control programs in the Las Vegas, Moapa, and Virgin River Valleys.