Smithsonian Institution, March 1, 1851. 

 Sir: — I have the honor herewith to transmit to you the Annual Report 

 of the Board of Regents of the Smithsonian Institution, and beg leave to 

 request that you will present the same to the Senate of the United States. 

 I am very respectfully. 



Your obedient servant, 



JOSEPH HENRY, 



Secretary Smithsonian Institution. 

 Hon. William R. King, 



President United States Senate. 



