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Indicates "practicable railroad lines," and "proposed railroad lines." Summer isotherms are in red, winter isotherms are in blue.
Shows exploration routes and railroads in Washington and Montana. Relief shown by hachures. LC copy sectioned in 2 and mounted on 1 sheet of cloth. Available also through the Library of Congress Web site as a raster image.
Relief shown by hachures. At head of title: Route near the 47th and 49th Parallels. Map no. 1. "Drawn by John Lambert. Topographer of the exploration." From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps... to Illustrate the Various Reports... (Washington, 1859) Description derived from published bibliography. Scale 1:1,200,000. LC Railroad maps, 154 Available also through the Library of Congress Web site as a raster image.
Relief shown by hachures. At head of title: Route near the 47th and 49th Parallels. Map no. 2. "Drawn by John Lambert. Topographer of the exploration, assisted by J. R. P. Mechlin." From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps... to Illustrate the Various Reports... (Washington, 1859) Description derived from published bibliography. Scale 1:1,200,000. LC Railroad maps, 155 Available also through the Library of Congress Web site as a raster image.
Relief shown by hachures. At head of title: Route near the 47th and 49th Parallels. Map no. 3. "Drawn by John Lambert, topographer of the exploration." From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps . . . to Illustrate the Various Reports . . . (Washington, 1859) Description derived from published bibliography. Inset: (Supplementary sketch) Reconnaissance of the railroad route from Wallawalla to Seattle via Yak-e-mah River & Snoqualmie Pass. By A. W. Tinkham in January 1854. Drawn by J. R. P. Mechlin. 20 x 28 cm. Scale 1:1,200,000. LC Railroad maps, 156 Available also through the Library of Congress Web site as a raster image.
Each sheet includes profile of ground covered.