Colton's railroad map (intermediate size) of the United States reduced from "Colton's railroad and commercial map of the United States."
G.W. & C.B. Colton & Co.
cartographic
New York,
1870.
eng
Detailed map of the United States showing drainage, cities and towns, internal boundaries, railroads named along the line, and railroads under construction.
Scale 1:2,217,600.
LC Railroad maps,
Description derived from published bibliography.
Inset: Plan of the western portion of the Unites States. 32 x 42 cm.
Railroads--United States--Maps.
United States.
Available also through the Library of Congress Web site as a raster image.
http://hdl.loc.gov/loc.gmd/g3701p.rr000500