1912 International Congress Applied Chemistry Colorado Photos and Railroad Map For Sale

Vintage 1912 souvenir portfolio from the Eighth International Congress of Applied Chemistry tour, featuring the Denver & Rio Grande Railroad and Pennsylvania Railroad. This historical ephemera set includes a large fold-out map of the United States detailing the Pacific Coast and Chicago-Boston tour routes, along with a sepia-toned photograph of a steam locomotive traversing the Canon of the Grand River in the Colorado Rockies. The photograph is signed by Geo. L. Beam and includes an original business card for Frank A. Wadleigh, General Passenger Agent, clipped to the top. The outer envelope features decorative gold-tone seals and "See America" branding, serving as a rare piece of early 20th-century railroad and scientific history.