LETTER 



FROM THE 



SECRETARY OF THE SMITHSONIAN INSTITUTION 



SUBMITTING 



THE ANNUAL REPORT OE THE BOARD OF REGENTS OF THE 

 INSTITUTION FOR THE YEAR ENDING JUNE 30, 1920. 



Smithsonian Institution, 

 Washington., April 13, 1921. 

 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 end- 

 ing June 30, 1920. I have the honor to be, 



Very respectfully, your obedient servant, 



Charles D. Walcott, 



Secretary. 

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