No. 217. The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy s More
Stereograph shows rock formations. Part of: Views among the Rocky Mountains of Colorado. Expedition of 1874. No. 237. Photographed for the U.S. Geological Survey of the Territories, F. V. Hayden, U.S. Geologis More