Territory of the United States from the Mississippi River to the Pacific Ocean; originally prepared to accompany the reports of the explorations for a Pacific railroad route
Relief shown by hachures and spot heights. "Railroads corrected June 5th 1873." This printing of the map includes the extension showing a portion of Canada compiled and drawn in 1871. Shows routes and dates of expeditions and surveys. Includes list of "Authorities" and inset "Territory of Alaska." Scale 1:3,000,000. Available also through the Library of Congress Web site as a raster image. Designed to show "Milt. posts underlined in red color." LC copy not colored. Vault AACR2
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