The collection of photographs from the Detroit Publishing Company Collection includes over 25,000 glass negatives and transparencies as well as about 300 color photolithograph prints, mostly of the eastern United States. A small group within the larger collection includes about 900 Mammoth Plate Photographs taken by William Henry Jackson along several railroad lines in the United States and Mexico in the 1880s and 1890s. The group also includes views of California, Wyoming and the Canadian Rockies.