Machu Picchu Hiram Bingham

View of Hiram Bingham III standing atop ruins at Machu Picchu in Peru. Hand-colored glass slide, from original image by Harry Ward Foote. Date of Creation 1911. Foote was a Yale Ph.B. (1895) and Ph.D. (1898), who was a professor of chemistry at Yale College, and served as the expedition collector and naturalist on Bingham's expeditions to Peru. Yale Peruvian Expedition Papers, Yale University Manuscripts & Archives Digital Images Database, Yale University, New Haven, Connecticut. This Image (or other media file) is in the public domain because its copyright has expired. This applies to the United States, where Works published prior to 1923 are copyright protected for a maximum of 75 years. See Circular 1 "COPYRIGHT BASICS" PDF from the U.S. Copyright Office. Works published before 1923 (in this case 1913) are now in the public domain.