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LETTER 



FROM THE 



SBOBETAEY OF THE SMITHSONIAN INSTITUTION 



SUBMITTING 



THE ANNUAL REPORT OP THE BOARD OF REGENTS OE THE 

 INSTITUTION FOR THE YEAR ENDING JUNE 30, 1921. 



Smithsonian Institution, 

 Washington, April 18, 1922. 

 To the Congress of the United States: 



In accordance with section 5593 of the Revised Statutes of the 

 United States, I have the honor, in behalf of the Board of Regents, 

 to submit to Congress the annual report of the operations, expendi- 

 tures, and condition of the Smithsonian Institution for the year 

 ending June 30, 1921. I have the honor to be, 

 Very respectfully, your obedient servant, 



Charles D. Walcott, 



Secretary. 



Ml 



