Smithsonian International Exchange Program Commences, July 21, 1851, Smithsonian Archives - History Div, The Smithsonian initiates full-scale operation of its international publications exchange, whereby it ships its own reports along with scientific publications from other American scientific organizations to Europe and in exchange receives scientific publications from abroad and distributes them within the United States. In 1852, the Smithsonian would transmit nearly eight thousand volumes and receive over four thousand foreign publications. The exchange system was eventually extended to Asia, Africa, Mexico, and South America. This program exemplifies Smithsonian Secretary Joseph Henry's belief that "the worth and importance of the institution is not to be estimated by what it accumulates within the walls of its building but by what it sends forth to the world.".