130 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1926 
Bureau, the Bureau of Mines, the Air Service, the National Research 
Gincicil the National Advisory Committee ae Aeronautics, and the 
principal learned societies, colleges, universities, museums, and art 
galleries of the East and Middle West. It also lends to public libra- 
ries, and sometimes borrows from them. 
Respectfully submitted. 
Wii14m L. Corsin, 
Librarian. 
Dr. Cuartes D. WatcortT, 
Secretary, Smithsonian Institution. 
Ay 
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