ADMINISTRATIVE REPORT 17 
inritern slidesuss) Si usu adiene! b_stedinile eo gots |r 16 
Photosraphicienlarcementss- Ssae0 Ssn seas Ean eres 6 
Film rolls developed from field exposures_____-_-_________ 24 
About 70 per cent of the photographie laboratory work 
for the bureau was done by Dr. A. J. Olmsted, of the 
United States National Museum; and 50 per cent of the 
illustration work by Mr. Gill was for the publications of 
the various bureaus of the Smithsonian Institution in co- 
operation. This arrangement has proved eminently satis- 
factory during the past year, with a substantial saving 
of more than 80 per cent of the former cost of photo- 
graphic work. 
LIBRARY 
The reference library has continued under the immedi- 
ate care of Miss Ella Leary, librarian, assisted by Mr. 
Thomas Blackwell. The library consists of 27,141 vol- 
umes, about 15,937 pamphlets, and several thousand un- 
bound periodicals. During the year 480 books were 
accessioned, of which 83 were acquired by purchase and 
397 by gift and exchange; also 3,950 serials, chiefly the 
publications of learned societies, were received and re- 
corded, of which only 102 were obtained by purchase, the 
remainder being received through exchange. Of pam- 
phlets, 225 were obtained. During the year 288 volumes 
were sent to the bindery. The catalogue was increased by 
the addition of 1,980 cards. A considerable amount of 
time was given to preparing bibliographic lists for corre- 
spondents. The endeavor to supply deficiencies in the sets 
of publications of institutions of learning was continued 
without remission. Requisition was made on the Library 
of Congress during the year for an aggregate of 300 vol- 
umes for official use. The bureau library was frequently 
consulted by officers of other Government establishments. 
COLLECTIONS 
92528. Collection of archeological and skeletal material (740 speci- 
mens) secured along the Upper Columbia River, Washing- 
ton, during the spring of 1926 by Herbert W. Krieger. 
