LETTER 
FROM THE 
SECRETARY OF THE SMITHSONIAN INSTITUTION, 
ACCOMPANYING 
The annual report of the Board of Regents of the Institution to the end of 
June, 1891, 
SMITHSONIAN INSTITUTION, 
Washington, D. O., July 1, 1891. 
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, expenditures, and con- 
dition of the Smithsonian Institution for the year ending June 30, 1891. 
I have the honor to be, very respectfully, your obedient servant, 
S. P. LANGLEY, 
Secretary of Smithsonian Institution, 
Hon. LEvi P. MorTon, 
President of the Senate. 
Hon. THOMAS B. REED, 
Speaker of the House of Representatives. 
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