Scale [ca. 1:4,000,000]. From his The American Atlas (London, J. Arrowsmith, 1839) LC Railroad maps, 6 Description derived from published bibliography. Map of the continental United States showing relief by hachures, drainage, state boundaries, cities and towns, roads, trails, canals, and railroads. Available also through the Library of Congress Web site as a raster image. col. map 91 x 124 cm.