Free Postage for "SI Exchange" Packages
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PrintUnited States Congress passes a provision allowing free mailing privileges for all packages marked "Smithsonian Exchange" that are sent or received by the Smithsonian Institution.
Chronology of Smithsonian History
Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520, SIHistory@si.edu
June 8, 1872