Early railroad photography consisted mostly of advertisements for the railroads, which hired photographers like William Henry Jackson. In Jackson's case, the Denver & Rio Grande Railroad even provided a special 3-car train with a mobile dark room to develop the plate glass negatives he used. Jackson used a combination of photography and lithography, providing eye-catching color advertisements in an era of black and white.
The Colorado Historical Society is displaying these advertisements in an exhibition at the society's Byers-Evans House Museum, 1310 Bannock Street in Denver. The exhibition is free and will run through the end of May. Visit the CHS site on the Byers-Evans House for more information.