Fourth annual report of the Board of Regents of the Smithsonian Institution, to the Senate and House of Representatives, showing the operations, expenditures, and condition of the Institution during the year 1849. July 25, 1850. Laid upon the table, and ordered to be printed
Appendix to the Report of the Board of Regents of the Smithsonian Institution, containing a report of the public libraries of the United States of America, January 1, 1850, follows p. 64.
Index to the Appendix follows p. 191.
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