Carleton Watkins Learned about Stereographs from the Langenheim Brothers
The Langenheim Brothers introduced the stereograph to America. Working in Philadelphia as early as 1852,
they produced and sold their images of notable cities and sites of the American Northeast. Carleton Watkins
apparently saw the stereographs, learned how to make them, and emulated the Langenheims's style and business
approach in the West.